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authorLinus Torvalds <torvalds@linux-foundation.org>2012-03-20 11:16:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-03-20 11:16:20 -0700
commit4a52246302f01596f0edf7b4a3e6425e23479192 (patch)
treef384d86722d3ccfc875e3e5e8d8726e993a922ee /drivers
parent9f9d2760da8c7f94fae119fac3e13d5a1702f8f0 (diff)
parentadc80ae60eae24a43a357bf5b30fb496f34aa605 (diff)
Merge tag 'driver-core-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core patches for 3.4-rc1 from Greg KH: "Here's the big driver core merge for 3.4-rc1. Lots of various things here, sysfs fixes/tweaks (with the nlink breakage reverted), dynamic debugging updates, w1 drivers, hyperv driver updates, and a variety of other bits and pieces, full information in the shortlog." * tag 'driver-core-3.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (78 commits) Tools: hv: Support enumeration from all the pools Tools: hv: Fully support the new KVP verbs in the user level daemon Drivers: hv: Support the newly introduced KVP messages in the driver Drivers: hv: Add new message types to enhance KVP regulator: Support driver probe deferral Revert "sysfs: Kill nlink counting." uevent: send events in correct order according to seqnum (v3) driver core: minor comment formatting cleanups driver core: move the deferred probe pointer into the private area drivercore: Add driver probe deferral mechanism DS2781 Maxim Stand-Alone Fuel Gauge battery and w1 slave drivers w1_bq27000: Only one thread can access the bq27000 at a time. w1_bq27000 - remove w1_bq27000_write w1_bq27000: remove unnecessary NULL test. sysfs: Fix memory leak in sysfs_sd_setsecdata(). intel_idle: Revert change of auto_demotion_disable_flags for Nehalem w1: Fix w1_bq27000 driver-core: documentation: fix up Greg's email address powernow-k6: Really enable auto-loading powernow-k7: Fix CPU family number ...
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/processor_driver.c1
-rw-r--r--drivers/acpi/processor_perflib.c22
-rw-r--r--drivers/base/Kconfig3
-rw-r--r--drivers/base/Makefile1
-rw-r--r--drivers/base/base.h6
-rw-r--r--drivers/base/bus.c6
-rw-r--r--drivers/base/core.c2
-rw-r--r--drivers/base/cpu.c11
-rw-r--r--drivers/base/dd.c148
-rw-r--r--drivers/base/driver.c35
-rw-r--r--drivers/base/soc.c183
-rw-r--r--drivers/cpufreq/cpufreq-nforce2.c8
-rw-r--r--drivers/cpufreq/e_powersaver.c20
-rw-r--r--drivers/cpufreq/elanfreq.c14
-rw-r--r--drivers/cpufreq/gx-suspmod.c9
-rw-r--r--drivers/cpufreq/longhaul.c8
-rw-r--r--drivers/cpufreq/longrun.c13
-rw-r--r--drivers/cpufreq/p4-clockmod.c17
-rw-r--r--drivers/cpufreq/powernow-k6.c12
-rw-r--r--drivers/cpufreq/powernow-k7.c14
-rw-r--r--drivers/cpufreq/powernow-k8.c19
-rw-r--r--drivers/cpufreq/sc520_freq.c14
-rw-r--r--drivers/cpufreq/speedstep-centrino.c24
-rw-r--r--drivers/cpufreq/speedstep-ich.c15
-rw-r--r--drivers/cpufreq/speedstep-lib.c1
-rw-r--r--drivers/cpufreq/speedstep-smi.c15
-rw-r--r--drivers/crypto/padlock-aes.c9
-rw-r--r--drivers/crypto/padlock-sha.c16
-rw-r--r--drivers/hid/hid-core.c6
-rw-r--r--drivers/hv/channel_mgmt.c87
-rw-r--r--drivers/hv/hv.c4
-rw-r--r--drivers/hv/hv_kvp.c253
-rw-r--r--drivers/hv/hv_kvp.h184
-rw-r--r--drivers/hv/hv_util.c3
-rw-r--r--drivers/hv/hyperv_vmbus.h5
-rw-r--r--drivers/hwmon/coretemp.c17
-rw-r--r--drivers/hwmon/via-cputemp.c16
-rw-r--r--drivers/idle/intel_idle.c112
-rw-r--r--drivers/input/gameport/gameport.c1
-rw-r--r--drivers/input/serio/serio.c1
-rw-r--r--drivers/media/video/cx18/cx18-alsa-main.c1
-rw-r--r--drivers/media/video/ivtv/ivtvfb.c2
-rw-r--r--drivers/media/video/s5p-fimc/fimc-mdevice.c5
-rw-r--r--drivers/media/video/s5p-tv/mixer_video.c1
-rw-r--r--drivers/net/phy/phy_device.c6
-rw-r--r--drivers/pci/pci-driver.c52
-rw-r--r--drivers/pci/xen-pcifront.c3
-rw-r--r--drivers/pcmcia/ds.c11
-rw-r--r--drivers/power/Kconfig14
-rw-r--r--drivers/power/Makefile1
-rw-r--r--drivers/power/ds2781_battery.c874
-rw-r--r--drivers/regulator/core.c4
-rw-r--r--drivers/s390/cio/ccwgroup.c2
-rw-r--r--drivers/s390/cio/device.c8
-rw-r--r--drivers/s390/net/smsgiucv_app.c9
-rw-r--r--drivers/ssb/main.c20
-rw-r--r--drivers/usb/core/driver.c66
-rw-r--r--drivers/usb/dwc3/dwc3-pci.c12
-rw-r--r--drivers/w1/masters/w1-gpio.c3
-rw-r--r--drivers/w1/slaves/Kconfig13
-rw-r--r--drivers/w1/slaves/Makefile1
-rw-r--r--drivers/w1/slaves/w1_bq27000.c36
-rw-r--r--drivers/w1/slaves/w1_ds2781.c201
-rw-r--r--drivers/w1/slaves/w1_ds2781.h136
-rw-r--r--drivers/w1/w1_family.h1
65 files changed, 2138 insertions, 679 deletions
diff --git a/drivers/acpi/processor_driver.c b/drivers/acpi/processor_driver.c
index 8ae05ce1850..2801b418d7b 100644
--- a/drivers/acpi/processor_driver.c
+++ b/drivers/acpi/processor_driver.c
@@ -474,6 +474,7 @@ static __ref int acpi_processor_start(struct acpi_processor *pr)
#ifdef CONFIG_CPU_FREQ
acpi_processor_ppc_has_changed(pr, 0);
+ acpi_processor_load_module(pr);
#endif
acpi_processor_get_throttling_info(pr);
acpi_processor_get_limit_info(pr);
diff --git a/drivers/acpi/processor_perflib.c b/drivers/acpi/processor_perflib.c
index 85b32376dad..0af48a8554c 100644
--- a/drivers/acpi/processor_perflib.c
+++ b/drivers/acpi/processor_perflib.c
@@ -240,6 +240,28 @@ void acpi_processor_ppc_exit(void)
acpi_processor_ppc_status &= ~PPC_REGISTERED;
}
+/*
+ * Do a quick check if the systems looks like it should use ACPI
+ * cpufreq. We look at a _PCT method being available, but don't
+ * do a whole lot of sanity checks.
+ */
+void acpi_processor_load_module(struct acpi_processor *pr)
+{
+ static int requested;
+ acpi_status status = 0;
+ struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+
+ if (!arch_has_acpi_pdc() || requested)
+ return;
+ status = acpi_evaluate_object(pr->handle, "_PCT", NULL, &buffer);
+ if (!ACPI_FAILURE(status)) {
+ printk(KERN_INFO PREFIX "Requesting acpi_cpufreq\n");
+ request_module_nowait("acpi_cpufreq");
+ requested = 1;
+ }
+ kfree(buffer.pointer);
+}
+
static int acpi_processor_get_performance_control(struct acpi_processor *pr)
{
int result = 0;
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 7be9f79018e..9aa618acfe9 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -176,6 +176,9 @@ config GENERIC_CPU_DEVICES
bool
default n
+config SOC_BUS
+ bool
+
source "drivers/base/regmap/Kconfig"
config DMA_SHARED_BUFFER
diff --git a/drivers/base/Makefile b/drivers/base/Makefile
index 610f9997a40..b6d1b9c4200 100644
--- a/drivers/base/Makefile
+++ b/drivers/base/Makefile
@@ -19,6 +19,7 @@ obj-$(CONFIG_MODULES) += module.o
endif
obj-$(CONFIG_SYS_HYPERVISOR) += hypervisor.o
obj-$(CONFIG_REGMAP) += regmap/
+obj-$(CONFIG_SOC_BUS) += soc.o
ccflags-$(CONFIG_DEBUG_DRIVER) := -DDEBUG
diff --git a/drivers/base/base.h b/drivers/base/base.h
index b858dfd9a37..6ee17bb391a 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -59,6 +59,10 @@ struct driver_private {
* @knode_parent - node in sibling list
* @knode_driver - node in driver list
* @knode_bus - node in bus list
+ * @deferred_probe - entry in deferred_probe_list which is used to retry the
+ * binding of drivers which were unable to get all the resources needed by
+ * the device; typically because it depends on another driver getting
+ * probed first.
* @driver_data - private pointer for driver specific info. Will turn into a
* list soon.
* @device - pointer back to the struct class that this structure is
@@ -71,6 +75,7 @@ struct device_private {
struct klist_node knode_parent;
struct klist_node knode_driver;
struct klist_node knode_bus;
+ struct list_head deferred_probe;
void *driver_data;
struct device *device;
};
@@ -105,6 +110,7 @@ extern void bus_remove_driver(struct device_driver *drv);
extern void driver_detach(struct device_driver *drv);
extern int driver_probe_device(struct device_driver *drv, struct device *dev);
+extern void driver_deferred_probe_del(struct device *dev);
static inline int driver_match_device(struct device_driver *drv,
struct device *dev)
{
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 40fb12288ce..26a06b801b5 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -1194,13 +1194,15 @@ EXPORT_SYMBOL_GPL(subsys_interface_register);
void subsys_interface_unregister(struct subsys_interface *sif)
{
- struct bus_type *subsys = sif->subsys;
+ struct bus_type *subsys;
struct subsys_dev_iter iter;
struct device *dev;
- if (!sif)
+ if (!sif || !sif->subsys)
return;
+ subsys = sif->subsys;
+
mutex_lock(&subsys->p->mutex);
list_del_init(&sif->node);
if (sif->remove_dev) {
diff --git a/drivers/base/core.c b/drivers/base/core.c
index 74dda4f697f..7050a75dde3 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -921,6 +921,7 @@ int device_private_init(struct device *dev)
dev->p->device = dev;
klist_init(&dev->p->klist_children, klist_children_get,
klist_children_put);
+ INIT_LIST_HEAD(&dev->p->deferred_probe);
return 0;
}
@@ -1188,6 +1189,7 @@ void device_del(struct device *dev)
device_remove_file(dev, &uevent_attr);
device_remove_attrs(dev);
bus_remove_device(dev);
+ driver_deferred_probe_del(dev);
/*
* Some platform devices are driven without driver attached
diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
index 4dabf5077c4..adf937bf409 100644
--- a/drivers/base/cpu.c
+++ b/drivers/base/cpu.c
@@ -11,6 +11,7 @@
#include <linux/device.h>
#include <linux/node.h>
#include <linux/gfp.h>
+#include <linux/slab.h>
#include <linux/percpu.h>
#include "base.h"
@@ -244,6 +245,9 @@ int __cpuinit register_cpu(struct cpu *cpu, int num)
cpu->dev.id = num;
cpu->dev.bus = &cpu_subsys;
cpu->dev.release = cpu_device_release;
+#ifdef CONFIG_ARCH_HAS_CPU_AUTOPROBE
+ cpu->dev.bus->uevent = arch_cpu_uevent;
+#endif
error = device_register(&cpu->dev);
if (!error && cpu->hotpluggable)
register_cpu_control(cpu);
@@ -268,6 +272,10 @@ struct device *get_cpu_device(unsigned cpu)
}
EXPORT_SYMBOL_GPL(get_cpu_device);
+#ifdef CONFIG_ARCH_HAS_CPU_AUTOPROBE
+static DEVICE_ATTR(modalias, 0444, arch_print_cpu_modalias, NULL);
+#endif
+
static struct attribute *cpu_root_attrs[] = {
#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
&dev_attr_probe.attr,
@@ -278,6 +286,9 @@ static struct attribute *cpu_root_attrs[] = {
&cpu_attrs[2].attr.attr,
&dev_attr_kernel_max.attr,
&dev_attr_offline.attr,
+#ifdef CONFIG_ARCH_HAS_CPU_AUTOPROBE
+ &dev_attr_modalias.attr,
+#endif
NULL
};
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 142e3d600f1..1b1cbb571d3 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -28,6 +28,141 @@
#include "base.h"
#include "power/power.h"
+/*
+ * Deferred Probe infrastructure.
+ *
+ * Sometimes driver probe order matters, but the kernel doesn't always have
+ * dependency information which means some drivers will get probed before a
+ * resource it depends on is available. For example, an SDHCI driver may
+ * first need a GPIO line from an i2c GPIO controller before it can be
+ * initialized. If a required resource is not available yet, a driver can
+ * request probing to be deferred by returning -EPROBE_DEFER from its probe hook
+ *
+ * Deferred probe maintains two lists of devices, a pending list and an active
+ * list. A driver returning -EPROBE_DEFER causes the device to be added to the
+ * pending list. A successful driver probe will trigger moving all devices
+ * from the pending to the active list so that the workqueue will eventually
+ * retry them.
+ *
+ * The deferred_probe_mutex must be held any time the deferred_probe_*_list
+ * of the (struct device*)->p->deferred_probe pointers are manipulated
+ */
+static DEFINE_MUTEX(deferred_probe_mutex);
+static LIST_HEAD(deferred_probe_pending_list);
+static LIST_HEAD(deferred_probe_active_list);
+static struct workqueue_struct *deferred_wq;
+
+/**
+ * deferred_probe_work_func() - Retry probing devices in the active list.
+ */
+static void deferred_probe_work_func(struct work_struct *work)
+{
+ struct device *dev;
+ struct device_private *private;
+ /*
+ * This block processes every device in the deferred 'active' list.
+ * Each device is removed from the active list and passed to
+ * bus_probe_device() to re-attempt the probe. The loop continues
+ * until every device in the active list is removed and retried.
+ *
+ * Note: Once the device is removed from the list and the mutex is
+ * released, it is possible for the device get freed by another thread
+ * and cause a illegal pointer dereference. This code uses
+ * get/put_device() to ensure the device structure cannot disappear
+ * from under our feet.
+ */
+ mutex_lock(&deferred_probe_mutex);
+ while (!list_empty(&deferred_probe_active_list)) {
+ private = list_first_entry(&deferred_probe_active_list,
+ typeof(*dev->p), deferred_probe);
+ dev = private->device;
+ list_del_init(&private->deferred_probe);
+
+ get_device(dev);
+
+ /*
+ * Drop the mutex while probing each device; the probe path may
+ * manipulate the deferred list
+ */
+ mutex_unlock(&deferred_probe_mutex);
+ dev_dbg(dev, "Retrying from deferred list\n");
+ bus_probe_device(dev);
+ mutex_lock(&deferred_probe_mutex);
+
+ put_device(dev);
+ }
+ mutex_unlock(&deferred_probe_mutex);
+}
+static DECLARE_WORK(deferred_probe_work, deferred_probe_work_func);
+
+static void driver_deferred_probe_add(struct device *dev)
+{
+ mutex_lock(&deferred_probe_mutex);
+ if (list_empty(&dev->p->deferred_probe)) {
+ dev_dbg(dev, "Added to deferred list\n");
+ list_add(&dev->p->deferred_probe, &deferred_probe_pending_list);
+ }
+ mutex_unlock(&deferred_probe_mutex);
+}
+
+void driver_deferred_probe_del(struct device *dev)
+{
+ mutex_lock(&deferred_probe_mutex);
+ if (!list_empty(&dev->p->deferred_probe)) {
+ dev_dbg(dev, "Removed from deferred list\n");
+ list_del_init(&dev->p->deferred_probe);
+ }
+ mutex_unlock(&deferred_probe_mutex);
+}
+
+static bool driver_deferred_probe_enable = false;
+/**
+ * driver_deferred_probe_trigger() - Kick off re-probing deferred devices
+ *
+ * This functions moves all devices from the pending list to the active
+ * list and schedules the deferred probe workqueue to process them. It
+ * should be called anytime a driver is successfully bound to a device.
+ */
+static void driver_deferred_probe_trigger(void)
+{
+ if (!driver_deferred_probe_enable)
+ return;
+
+ /*
+ * A successful probe means that all the devices in the pending list
+ * should be triggered to be reprobed. Move all the deferred devices
+ * into the active list so they can be retried by the workqueue
+ */
+ mutex_lock(&deferred_probe_mutex);
+ list_splice_tail_init(&deferred_probe_pending_list,
+ &deferred_probe_active_list);
+ mutex_unlock(&deferred_probe_mutex);
+
+ /*
+ * Kick the re-probe thread. It may already be scheduled, but it is
+ * safe to kick it again.
+ */
+ queue_work(deferred_wq, &deferred_probe_work);
+}
+
+/**
+ * deferred_probe_initcall() - Enable probing of deferred devices
+ *
+ * We don't want to get in the way when the bulk of drivers are getting probed.
+ * Instead, this initcall makes sure that deferred probing is delayed until
+ * late_initcall time.
+ */
+static int deferred_probe_initcall(void)
+{
+ deferred_wq = create_singlethread_workqueue("deferwq");
+ if (WARN_ON(!deferred_wq))
+ return -ENOMEM;
+
+ driver_deferred_probe_enable = true;
+ driver_deferred_probe_trigger();
+ return 0;
+}
+late_initcall(deferred_probe_initcall);
static void driver_bound(struct device *dev)
{
@@ -42,6 +177,13 @@ static void driver_bound(struct device *dev)
klist_add_tail(&dev->p->knode_driver, &dev->driver->p->klist_devices);
+ /*
+ * Make sure the device is no longer in one of the deferred lists and
+ * kick off retrying all pending devices
+ */
+ driver_deferred_probe_del(dev);
+ driver_deferred_probe_trigger();
+
if (dev->bus)
blocking_notifier_call_chain(&dev->bus->p->bus_notifier,
BUS_NOTIFY_BOUND_DRIVER, dev);
@@ -142,7 +284,11 @@ probe_failed:
driver_sysfs_remove(dev);
dev->driver = NULL;
- if (ret != -ENODEV && ret != -ENXIO) {
+ if (ret == -EPROBE_DEFER) {
+ /* Driver requested deferred probing */
+ dev_info(dev, "Driver %s requests probe deferral\n", drv->name);
+ driver_deferred_probe_add(dev);
+ } else if (ret != -ENODEV && ret != -ENXIO) {
/* driver matched but the probe failed */
printk(KERN_WARNING
"%s: probe of %s failed with error %d\n",
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index b631f7c5945..60e4f77ca66 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -153,34 +153,6 @@ int driver_add_kobj(struct device_driver *drv, struct kobject *kobj,
}
EXPORT_SYMBOL_GPL(driver_add_kobj);
-/**
- * get_driver - increment driver reference count.
- * @drv: driver.
- */
-struct device_driver *get_driver(struct device_driver *drv)
-{
- if (drv) {
- struct driver_private *priv;
- struct kobject *kobj;
-
- kobj = kobject_get(&drv->p->kobj);
- priv = to_driver(kobj);
- return priv->driver;
- }
- return NULL;
-}
-EXPORT_SYMBOL_GPL(get_driver);
-
-/**
- * put_driver - decrement driver's refcount.
- * @drv: driver.
- */
-void put_driver(struct device_driver *drv)
-{
- kobject_put(&drv->p->kobj);
-}
-EXPORT_SYMBOL_GPL(put_driver);
-
static int driver_add_groups(struct device_driver *drv,
const struct attribute_group **groups)
{
@@ -234,7 +206,6 @@ int driver_register(struct device_driver *drv)
other = driver_find(drv->name, drv->bus);
if (other) {
- put_driver(other);
printk(KERN_ERR "Error: Driver '%s' is already registered, "
"aborting...\n", drv->name);
return -EBUSY;
@@ -275,7 +246,9 @@ EXPORT_SYMBOL_GPL(driver_unregister);
* Call kset_find_obj() to iterate over list of drivers on
* a bus to find driver by name. Return driver if found.
*
- * Note that kset_find_obj increments driver's reference count.
+ * This routine provides no locking to prevent the driver it returns
+ * from being unregistered or unloaded while the caller is using it.
+ * The caller is responsible for preventing this.
*/
struct device_driver *driver_find(const char *name, struct bus_type *bus)
{
@@ -283,6 +256,8 @@ struct device_driver *driver_find(const char *name, struct bus_type *bus)
struct driver_private *priv;
if (k) {
+ /* Drop reference added by kset_find_obj() */
+ kobject_put(k);
priv = to_driver(k);
return priv->driver;
}
diff --git a/drivers/base/soc.c b/drivers/base/soc.c
new file mode 100644
index 00000000000..05f150382da
--- /dev/null
+++ b/drivers/base/soc.c
@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) ST-Ericsson SA 2011
+ *
+ * Author: Lee Jones <lee.jones@linaro.org> for ST-Ericsson.
+ * License terms: GNU General Public License (GPL), version 2
+ */
+
+#include <linux/sysfs.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/stat.h>
+#include <linux/slab.h>
+#include <linux/idr.h>
+#include <linux/spinlock.h>
+#include <linux/sys_soc.h>
+#include <linux/err.h>
+
+static DEFINE_IDR(soc_ida);
+static DEFINE_SPINLOCK(soc_lock);
+
+static ssize_t soc_info_get(struct device *dev,
+ struct device_attribute *attr,
+ char *buf);
+
+struct soc_device {
+ struct device dev;
+ struct soc_device_attribute *attr;
+ int soc_dev_num;
+};
+
+static struct bus_type soc_bus_type = {
+ .name = "soc",
+};
+
+static DEVICE_ATTR(machine, S_IRUGO, soc_info_get, NULL);
+static DEVICE_ATTR(family, S_IRUGO, soc_info_get, NULL);
+static DEVICE_ATTR(soc_id, S_IRUGO, soc_info_get, NULL);
+static DEVICE_ATTR(revision, S_IRUGO, soc_info_get, NULL);
+
+struct device *soc_device_to_device(struct soc_device *soc_dev)
+{
+ return &soc_dev->dev;
+}
+
+static mode_t soc_attribute_mode(struct kobject *kobj,
+ struct attribute *attr,
+ int index)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
+
+ if ((attr == &dev_attr_machine.attr)
+ && (soc_dev->attr->machine != NULL))
+ return attr->mode;
+ if ((attr == &dev_attr_family.attr)
+ && (soc_dev->attr->family != NULL))
+ return attr->mode;
+ if ((attr == &dev_attr_revision.attr)
+ && (soc_dev->attr->revision != NULL))
+ return attr->mode;
+ if ((attr == &dev_attr_soc_id.attr)
+ && (soc_dev->attr->soc_id != NULL))
+ return attr->mode;
+
+ /* Unknown or unfilled attribute. */
+ return 0;
+}
+
+static ssize_t soc_info_get(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
+
+ if (attr == &dev_attr_machine)
+ return sprintf(buf, "%s\n", soc_dev->attr->machine);
+ if (attr == &dev_attr_family)
+ return sprintf(buf, "%s\n", soc_dev->attr->family);
+ if (attr == &dev_attr_revision)
+ return sprintf(buf, "%s\n", soc_dev->attr->revision);
+ if (attr == &dev_attr_soc_id)
+ return sprintf(buf, "%s\n", soc_dev->attr->soc_id);
+
+ return -EINVAL;
+
+}
+
+static struct attribute *soc_attr[] = {
+ &dev_attr_machine.attr,
+ &dev_attr_family.attr,
+ &dev_attr_soc_id.attr,
+ &dev_attr_revision.attr,
+ NULL,
+};
+
+static const struct attribute_group soc_attr_group = {
+ .attrs = soc_attr,
+ .is_visible = soc_attribute_mode,
+};
+
+static const struct attribute_group *soc_attr_groups[] = {
+ &soc_attr_group,
+ NULL,
+};
+
+static void soc_release(struct device *dev)
+{
+ struct soc_device *soc_dev = container_of(dev, struct soc_device, dev);
+
+ kfree(soc_dev);
+}
+
+struct soc_device *soc_device_register(struct soc_device_attribute *soc_dev_attr)
+{
+ struct soc_device *soc_dev;
+ int ret;
+
+ soc_dev = kzalloc(sizeof(*soc_dev), GFP_KERNEL);
+ if (!soc_dev) {
+ ret = -ENOMEM;
+ goto out1;
+ }
+
+ /* Fetch a unique (reclaimable) SOC ID. */
+ do {
+ if (!ida_pre_get(&soc_ida, GFP_KERNEL)) {
+ ret = -ENOMEM;
+ goto out2;
+ }
+
+ spin_lock(&soc_lock);
+ ret = ida_get_new(&soc_ida, &soc_dev->soc_dev_num);
+ spin_unlock(&soc_lock);
+
+ } while (ret == -EAGAIN);
+
+ if (ret)
+ goto out2;
+
+ soc_dev->attr = soc_dev_attr;
+ soc_dev->dev.bus = &soc_bus_type;
+ soc_dev->dev.groups = soc_attr_groups;
+ soc_dev->dev.release = soc_release;
+
+ dev_set_name(&soc_dev->dev, "soc%d", soc_dev->soc_dev_num);
+
+ ret = device_register(&soc_dev->dev);
+ if (ret)
+ goto out3;
+
+ return soc_dev;
+
+out3:
+ ida_remove(&soc_ida, soc_dev->soc_dev_num);
+out2:
+ kfree(soc_dev);
+out1:
+ return ERR_PTR(ret);
+}
+
+/* Ensure soc_dev->attr is freed prior to calling soc_device_unregister. */
+void soc_device_unregister(struct soc_device *soc_dev)
+{
+ ida_remove(&soc_ida, soc_dev->soc_dev_num);
+
+ device_unregister(&soc_dev->dev);
+}
+
+static int __init soc_bus_register(void)
+{
+ spin_lock_init(&soc_lock);
+
+ return bus_register(&soc_bus_type);
+}
+core_initcall(soc_bus_register);
+
+static void __exit soc_bus_unregister(void)
+{
+ ida_destroy(&soc_ida);
+
+ bus_unregister(&soc_bus_type);
+}
+module_exit(soc_bus_unregister);
diff --git a/drivers/cpufreq/cpufreq-nforce2.c b/drivers/cpufreq/cpufreq-nforce2.c
index 7bac808804f..13d311ee08b 100644
--- a/drivers/cpufreq/cpufreq-nforce2.c
+++ b/drivers/cpufreq/cpufreq-nforce2.c
@@ -385,6 +385,14 @@ static struct cpufreq_driver nforce2_driver = {
.owner = THIS_MODULE,
};
+#ifdef MODULE
+static DEFINE_PCI_DEVICE_TABLE(nforce2_ids) = {
+ { PCI_VENDOR_ID_NVIDIA, PCI_DEVICE_ID_NVIDIA_NFORCE2 },
+ {}
+};
+MODULE_DEVICE_TABLE(pci, nforce2_ids);
+#endif
+
/**
* nforce2_detect_chipset - detect the Southbridge which contains FSB PLL logic
*
diff --git a/drivers/cpufreq/e_powersaver.c b/drivers/cpufreq/e_powersaver.c
index 4bd6815d317..3fffbe6025c 100644
--- a/drivers/cpufreq/e_powersaver.c
+++ b/drivers/cpufreq/e_powersaver.c
@@ -16,6 +16,7 @@
#include <linux/io.h>
#include <linux/delay.h>
+#include <asm/cpu_device_id.h>
#include <asm/msr.h>
#include <asm/tsc.h>
@@ -437,18 +438,19 @@ static struct cpufreq_driver eps_driver = {
.attr = eps_attr,
};
+
+/* This driver will work only on Centaur C7 processors with
+ * Enhanced SpeedStep/PowerSaver registers */
+static const struct x86_cpu_id eps_cpu_id[] = {
+ { X86_VENDOR_CENTAUR, 6, X86_MODEL_ANY, X86_FEATURE_EST },
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, eps_cpu_id);
+
static int __init eps_init(void)
{
- struct cpuinfo_x86 *c = &cpu_data(0);
-
- /* This driver will work only on Centaur C7 processors with
- * Enhanced SpeedStep/PowerSaver registers */
- if (c->x86_vendor != X86_VENDOR_CENTAUR
- || c->x86 != 6 || c->x86_model < 10)
- return -ENODEV;
- if (!cpu_has(c, X86_FEATURE_EST))
+ if (!x86_match_cpu(eps_cpu_id) || boot_cpu_data.x86_model < 10)
return -ENODEV;
-
if (cpufreq_register_driver(&eps_driver))
return -EINVAL;
return 0;
diff --git a/drivers/cpufreq/elanfreq.c b/drivers/cpufreq/elanfreq.c
index c587db472a7..960671fd3d7 100644
--- a/drivers/cpufreq/elanfreq.c
+++ b/drivers/cpufreq/elanfreq.c
@@ -23,6 +23,7 @@
#include <linux/delay.h>
#include <linux/cpufreq.h>
+#include <asm/cpu_device_id.h>
#include <asm/msr.h>
#include <linux/timex.h>
#include <linux/io.h>
@@ -277,17 +278,16 @@ static struct cpufreq_driver elanfreq_driver = {
.attr = elanfreq_attr,
};
+static const struct x86_cpu_id elan_id[] = {
+ { X86_VENDOR_AMD, 4, 10, },
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, elan_id);
static int __init elanfreq_init(void)
{
- struct cpuinfo_x86 *c = &cpu_data(0);
-
- /* Test if we have the right hardware */
- if ((c->x86_vendor != X86_VENDOR_AMD) ||
- (c->x86 != 4) || (c->x86_model != 10)) {
- printk(KERN_INFO "elanfreq: error: no Elan processor found!\n");
+ if (!x86_match_cpu(elan_id))
return -ENODEV;
- }
return cpufreq_register_driver(&elanfreq_driver);
}
diff --git a/drivers/cpufreq/gx-suspmod.c b/drivers/cpufreq/gx-suspmod.c
index ffe1f2c92ed..456bee058fe 100644
--- a/drivers/cpufreq/gx-suspmod.c
+++ b/drivers/cpufreq/gx-suspmod.c
@@ -82,6 +82,7 @@
#include <linux/errno.h>
#include <linux/slab.h>
+#include <asm/cpu_device_id.h>
#include <asm/processor-cyrix.h>
/* PCI config registers, all at F0 */
@@ -171,6 +172,7 @@ static struct pci_device_id gx_chipset_tbl[] __initdata = {
{ PCI_VDEVICE(CYRIX, PCI_DEVICE_ID_CYRIX_5510), },
{ 0, },
};
+MODULE_DEVICE_TABLE(pci, gx_chipset_tbl);
static void gx_write_byte(int reg, int value)
{
@@ -185,13 +187,6 @@ static __init struct pci_dev *gx_detect_chipset(void)
{
struct pci_dev *gx_pci = NULL;
- /* check if CPU is a MediaGX or a Geode. */
- if ((boot_cpu_data.x86_vendor != X86_VENDOR_NSC) &&
- (boot_cpu_data.x86_vendor != X86_VENDOR_CYRIX)) {
- pr_debug("error: no MediaGX/Geode processor found!\n");
- return NULL;
- }
-
/* detect which companion chip is used */
for_each_pci_dev(gx_pci) {
if ((pci_match_id(gx_chipset_tbl, gx_pci)) != NULL)
diff --git a/drivers/cpufreq/longhaul.c b/drivers/cpufreq/longhaul.c
index f47d26e2a13..53ddbc760af 100644
--- a/drivers/cpufreq/longhaul.c
+++ b/drivers/cpufreq/longhaul.c
@@ -35,6 +35,7 @@
#include <linux/acpi.h>
#include <asm/msr.h>
+#include <asm/cpu_device_id.h>
#include <acpi/processor.h>
#include "longhaul.h"
@@ -951,12 +952,17 @@ static struct cpufreq_driver longhaul_driver = {
.attr = longhaul_attr,
};
+static const struct x86_cpu_id longhaul_id[] = {
+ { X86_VENDOR_CENTAUR, 6 },
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, longhaul_id);
static int __init longhaul_init(void)
{
struct cpuinfo_x86 *c = &cpu_data(0);
- if (c->x86_vendor != X86_VENDOR_CENTAUR || c->x86 != 6)
+ if (!x86_match_cpu(longhaul_id))
return -ENODEV;
#ifdef CONFIG_SMP
diff --git a/drivers/cpufreq/longrun.c b/drivers/cpufreq/longrun.c
index 34ea359b370..8bc9f5fbbae 100644
--- a/drivers/cpufreq/longrun.c
+++ b/drivers/cpufreq/longrun.c
@@ -14,6 +14,7 @@
#include <asm/msr.h>
#include <asm/processor.h>
+#include <asm/cpu_device_id.h>
static struct cpufreq_driver longrun_driver;
@@ -288,6 +289,12 @@ static struct cpufreq_driver longrun_driver = {
.owner = THIS_MODULE,
};
+static const struct x86_cpu_id longrun_ids[] = {
+ { X86_VENDOR_TRANSMETA, X86_FAMILY_ANY, X86_MODEL_ANY,
+ X86_FEATURE_LONGRUN },
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, longrun_ids);
/**
* longrun_init - initializes the Transmeta Crusoe LongRun CPUFreq driver
@@ -296,12 +303,8 @@ static struct cpufreq_driver longrun_driver = {
*/
static int __init longrun_init(void)
{
- struct cpuinfo_x86 *c = &cpu_data(0);
-
- if (c->x86_vendor != X86_VENDOR_TRANSMETA ||
- !cpu_has(c, X86_FEATURE_LONGRUN))
+ if (!x86_match_cpu(longrun_ids))
return -ENODEV;
-
return cpufreq_register_driver(&longrun_driver);
}
diff --git a/drivers/cpufreq/p4-clockmod.c b/drivers/cpufreq/p4-clockmod.c
index 6be3e0760c2..827629c9aad 100644
--- a/drivers/cpufreq/p4-clockmod.c
+++ b/drivers/cpufreq/p4-clockmod.c
@@ -31,6 +31,7 @@
#include <asm/processor.h>
#include <asm/msr.h>
#include <asm/timer.h>
+#include <asm/cpu_device_id.h>
#include "speedstep-lib.h"
@@ -289,21 +290,25 @@ static struct cpufreq_driver p4clockmod_driver = {
.attr = p4clockmod_attr,
};
+static const struct x86_cpu_id cpufreq_p4_id[] = {
+ { X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_ACC },
+ {}
+};
+
+/*
+ * Intentionally no MODULE_DEVICE_TABLE here: this driver should not
+ * be auto loaded. Please don't add one.
+ */
static int __init cpufreq_p4_init(void)
{
- struct cpuinfo_x86 *c = &cpu_data(0);
int ret;
/*
* THERM_CONTROL is architectural for IA32 now, so
* we can rely on the capability checks
*/
- if (c->x86_vendor != X86_VENDOR_INTEL)
- return -ENODEV;
-
- if (!test_cpu_cap(c, X86_FEATURE_ACPI) ||
- !test_cpu_cap(c, X86_FEATURE_ACC))
+ if (!x86_match_cpu(cpufreq_p4_id) || !boot_cpu_has(X86_FEATURE_ACPI))
return -ENODEV;
ret = cpufreq_register_driver(&p4clockmod_driver);
diff --git a/drivers/cpufreq/powernow-k6.c b/drivers/cpufreq/powernow-k6.c
index b3379d6a5c5..af23e0b9ec9 100644
--- a/drivers/cpufreq/powernow-k6.c
+++ b/drivers/cpufreq/powernow-k6.c
@@ -16,6 +16,7 @@
#include <linux/timex.h>
#include <linux/io.h>
+#include <asm/cpu_device_id.h>
#include <asm/msr.h>
#define POWERNOW_IOPORT 0xfff0 /* it doesn't matter where, as long
@@ -210,6 +211,12 @@ static struct cpufreq_driver powernow_k6_driver = {
.attr = powernow_k6_attr,
};
+static const struct x86_cpu_id powernow_k6_ids[] = {
+ { X86_VENDOR_AMD, 5, 12 },
+ { X86_VENDOR_AMD, 5, 13 },
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, powernow_k6_ids);
/**
* powernow_k6_init - initializes the k6 PowerNow! CPUFreq driver
@@ -220,10 +227,7 @@ static struct cpufreq_driver powernow_k6_driver = {
*/
static int __init powernow_k6_init(void)
{
- struct cpuinfo_x86 *c = &cpu_data(0);
-
- if ((c->x86_vendor != X86_VENDOR_AMD) || (c->x86 != 5) ||
- ((c->x86_model != 12) && (c->x86_model != 13)))
+ if (!x86_match_cpu(powernow_k6_ids))
return -ENODEV;
if (!request_region(POWERNOW_IOPORT, 16, "PowerNow!")) {
diff --git a/drivers/cpufreq/powernow-k7.c b/drivers/cpufreq/powernow-k7.c
index d71d9f37235..cf7e1ee005a 100644
--- a/drivers/cpufreq/powernow-k7.c
+++ b/drivers/cpufreq/powernow-k7.c
@@ -28,6 +28,7 @@
#include <asm/timer.h> /* Needed for recalibrate_cpu_khz() */
#include <asm/msr.h>
#include <asm/system.h>
+#include <asm/cpu_device_id.h>
#ifdef CONFIG_X86_POWERNOW_K7_ACPI
#include <linux/acpi.h>
@@ -110,18 +111,19 @@ static int check_fsb(unsigned int fsbspeed)
return delta < 5;
}
+static const struct x86_cpu_id powernow_k7_cpuids[] = {
+ { X86_VENDOR_AMD, 6, },
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, powernow_k7_cpuids);
+
static int check_powernow(void)
{
struct cpuinfo_x86 *c = &cpu_data(0);
unsigned int maxei, eax, ebx, ecx, edx;
- if ((c->x86_vendor != X86_VENDOR_AMD) || (c->x86 != 6)) {
-#ifdef MODULE
- printk(KERN_INFO PFX "This module only works with "
- "AMD K7 CPUs\n");
-#endif
+ if (!x86_match_cpu(powernow_k7_cpuids))
return 0;
- }
/* Get maximum capabilities */
maxei = cpuid_eax(0x80000000);
diff --git a/drivers/cpufreq/powernow-k8.c b/drivers/cpufreq/powernow-k8.c
index 8f9b2ceeec8..c0e816468e3 100644
--- a/drivers/cpufreq/powernow-k8.c
+++ b/drivers/cpufreq/powernow-k8.c
@@ -40,6 +40,7 @@
#include <linux/delay.h>
#include <asm/msr.h>
+#include <asm/cpu_device_id.h>
#include <linux/acpi.h>
#include <linux/mutex.h>
@@ -520,6 +521,15 @@ static int core_voltage_post_transition(struct powernow_k8_data *data,
return 0;
}
+static const struct x86_cpu_id powernow_k8_ids[] = {
+ /* IO based frequency switching */
+ { X86_VENDOR_AMD, 0xf },
+ /* MSR based frequency switching supported */
+ X86_FEATURE_MATCH(X86_FEATURE_HW_PSTATE),
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, powernow_k8_ids);
+
static void check_supported_cpu(void *_rc)
{
u32 eax, ebx, ecx, edx;
@@ -527,13 +537,7 @@ static void check_supported_cpu(void *_rc)
*rc = -ENODEV;
- if (__this_cpu_read(cpu_info.x86_vendor) != X86_VENDOR_AMD)
- return;
-
eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE);
- if (((eax & CPUID_XFAM) != CPUID_XFAM_K8) &&
- ((eax & CPUID_XFAM) < CPUID_XFAM_10H))
- return;
if ((eax & CPUID_XFAM) == CPUID_XFAM_K8) {
if (((eax & CPUID_USE_XFAM_XMOD) != CPUID_USE_XFAM_XMOD) ||
@@ -1553,6 +1557,9 @@ static int __cpuinit powernowk8_init(void)
unsigned int i, supported_cpus = 0, cpu;
int rv;
+ if (!x86_match_cpu(powernow_k8_ids))
+ return -ENODEV;
+
for_each_online_cpu(i) {
int rc;
smp_call_function_single(i, check_supported_cpu, &rc, 1);
diff --git a/drivers/cpufreq/sc520_freq.c b/drivers/cpufreq/sc520_freq.c
index 1e205e6b172..e42e073cd9b 100644
--- a/drivers/cpufreq/sc520_freq.c
+++ b/drivers/cpufreq/sc520_freq.c
@@ -22,6 +22,7 @@
#include <linux/timex.h>
#include <linux/io.h>
+#include <asm/cpu_device_id.h>
#include <asm/msr.h>
#define MMCR_BASE 0xfffef000 /* The default base address */
@@ -150,18 +151,19 @@ static struct cpufreq_driver sc520_freq_driver = {
.attr = sc520_freq_attr,
};
+static const struct x86_cpu_id sc520_ids[] = {
+ { X86_VENDOR_AMD, 4, 9 },
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, sc520_ids);
static int __init sc520_freq_init(void)
{
- struct cpuinfo_x86 *c = &cpu_data(0);
int err;
- /* Test if we have the right hardware */
- if (c->x86_vendor != X86_VENDOR_AMD ||
- c->x86 != 4 || c->x86_model != 9) {
- pr_debug("no Elan SC520 processor found!\n");
+ if (!x86_match_cpu(sc520_ids))
return -ENODEV;
- }
+
cpuctl = ioremap((unsigned long)(MMCR_BASE + OFFS_CPUCTL), 1);
if (!cpuctl) {
printk(KERN_ERR "sc520_freq: error: failed to remap memory\n");
diff --git a/drivers/cpufreq/speedstep-centrino.c b/drivers/cpufreq/speedstep-centrino.c
index 6ea3455def2..3a953d519f4 100644
--- a/drivers/cpufreq/speedstep-centrino.c
+++ b/drivers/cpufreq/speedstep-centrino.c
@@ -25,6 +25,7 @@
#include <asm/msr.h>
#include <asm/processor.h>
#include <asm/cpufeature.h>
+#include <asm/cpu_device_id.h>
#define PFX "speedstep-centrino: "
#define MAINTAINER "cpufreq@vger.kernel.org"
@@ -595,6 +596,24 @@ static struct cpufreq_driver centrino_driver = {
.owner = THIS_MODULE,
};
+/*
+ * This doesn't replace the detailed checks above because
+ * the generic CPU IDs don't have a way to match for steppings
+ * or ASCII model IDs.
+ */
+static const struct x86_cpu_id centrino_ids[] = {
+ { X86_VENDOR_INTEL, 6, 9, X86_FEATURE_EST },
+ { X86_VENDOR_INTEL, 6, 13, X86_FEATURE_EST },
+ { X86_VENDOR_INTEL, 6, 13, X86_FEATURE_EST },
+ { X86_VENDOR_INTEL, 6, 13, X86_FEATURE_EST },
+ { X86_VENDOR_INTEL, 15, 3, X86_FEATURE_EST },
+ { X86_VENDOR_INTEL, 15, 4, X86_FEATURE_EST },
+ {}
+};
+#if 0
+/* Autoload or not? Do not for now. */
+MODULE_DEVICE_TABLE(x86cpu, centrino_ids);
+#endif
/**
* centrino_init - initializes the Enhanced SpeedStep CPUFreq driver
@@ -612,11 +631,8 @@ static struct cpufreq_driver centrino_driver = {
*/
static int __init centrino_init(void)
{
- struct cpuinfo_x86 *cpu = &cpu_data(0);
-
- if (!cpu_has(cpu, X86_FEATURE_EST))
+ if (!x86_match_cpu(centrino_ids))
return -ENODEV;
-
return cpufreq_register_driver(&centrino_driver);
}
diff --git a/drivers/cpufreq/speedstep-ich.c b/drivers/cpufreq/speedstep-ich.c
index a748ce782fe..7432b3a72cd 100644
--- a/drivers/cpufreq/speedstep-ich.c
+++ b/drivers/cpufreq/speedstep-ich.c
@@ -25,6 +25,8 @@
#include <linux/pci.h>
#include <linux/sched.h>
+#include <asm/cpu_device_id.h>
+
#include "speedstep-lib.h"
@@ -388,6 +390,16 @@ static struct cpufreq_driver speedstep_driver = {
.attr = speedstep_attr,
};
+static const struct x86_cpu_id ss_smi_ids[] = {
+ { X86_VENDOR_INTEL, 6, 0xb, },
+ { X86_VENDOR_INTEL, 6, 0x8, },
+ { X86_VENDOR_INTEL, 15, 2 },
+ {}
+};
+#if 0
+/* Autoload or not? Do not for now. */
+MODULE_DEVICE_TABLE(x86cpu, ss_smi_ids);
+#endif
/**
* speedstep_init - initializes the SpeedStep CPUFreq driver
@@ -398,6 +410,9 @@ static struct cpufreq_driver speedstep_driver = {
*/
static int __init speedstep_init(void)
{
+ if (!x86_match_cpu(ss_smi_ids))
+ return -ENODEV;
+
/* detect processor */
speedstep_processor = speedstep_detect_processor();
if (!speedstep_processor) {
diff --git a/drivers/cpufreq/speedstep-lib.c b/drivers/cpufreq/speedstep-lib.c
index 8af2d2fd9d5..7047821a7f8 100644
--- a/drivers/cpufreq/speedstep-lib.c
+++ b/drivers/cpufreq/speedstep-lib.c
@@ -249,6 +249,7 @@ EXPORT_SYMBOL_GPL(speedstep_get_frequency);
* DETECT SPEEDSTEP-CAPABLE PROCESSOR *
*********************************************************************/
+/* Keep in sync with the x86_cpu_id tables in the different modules */
unsigned int speedstep_detect_processor(void)
{
struct cpuinfo_x86 *c = &cpu_data(0);
diff --git a/drivers/cpufreq/speedstep-smi.c b/drivers/cpufreq/speedstep-smi.c
index c76ead3490b..6a457fcaaad 100644
--- a/drivers/cpufreq/speedstep-smi.c
+++ b/drivers/cpufreq/speedstep-smi.c
@@ -20,6 +20,7 @@
#include <linux/delay.h>
#include <linux/io.h>
#include <asm/ist.h>
+#include <asm/cpu_device_id.h>
#include "speedstep-lib.h"
@@ -379,6 +380,17 @@ static struct cpufreq_driver speedstep_driver = {
.attr = speedstep_attr,
};
+static const struct x86_cpu_id ss_smi_ids[] = {
+ { X86_VENDOR_INTEL, 6, 0xb, },
+ { X86_VENDOR_INTEL, 6, 0x8, },
+ { X86_VENDOR_INTEL, 15, 2 },
+ {}
+};
+#if 0
+/* Not auto loaded currently */
+MODULE_DEVICE_TABLE(x86cpu, ss_smi_ids);
+#endif
+
/**
* speedstep_init - initializes the SpeedStep CPUFreq driver
*
@@ -388,6 +400,9 @@ static struct cpufreq_driver speedstep_driver = {
*/
static int __init speedstep_init(void)
{
+ if (!x86_match_cpu(ss_smi_ids))
+ return -ENODEV;
+
speedstep_processor = speedstep_detect_processor();
switch (speedstep_processor) {
diff --git a/drivers/crypto/padlock-aes.c b/drivers/crypto/padlock-aes.c
index 29b9469f837..37b2e9406af 100644
--- a/drivers/crypto/padlock-aes.c
+++ b/drivers/crypto/padlock-aes.c
@@ -19,6 +19,7 @@
#include <linux/percpu.h>
#include <linux/smp.h>
#include <linux/slab.h>
+#include <asm/cpu_device_id.h>
#include <asm/byteorder.h>
#include <asm/processor.h>
#include <asm/i387.h>
@@ -503,12 +504,18 @@ static struct crypto_alg cbc_aes_alg = {
}
};
+static struct x86_cpu_id padlock_cpu_id[] = {
+ X86_FEATURE_MATCH(X86_FEATURE_XCRYPT),
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, padlock_cpu_id);
+
static int __init padlock_init(void)
{
int ret;
struct cpuinfo_x86 *c = &cpu_data(0);
- if (!cpu_has_xcrypt)
+ if (!x86_match_cpu(padlock_cpu_id))
return -ENODEV;
if (!cpu_has_xcrypt_enabled) {
diff --git a/drivers/crypto/padlock-sha.c b/drivers/crypto/padlock-sha.c
index 06bdb4b2c6a..9266c0e2549 100644
--- a/drivers/crypto/padlock-sha.c
+++ b/drivers/crypto/padlock-sha.c
@@ -22,6 +22,7 @@
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/scatterlist.h>
+#include <asm/cpu_device_id.h>
#include <asm/i387.h>
struct padlock_sha_desc {
@@ -526,6 +527,12 @@ static struct shash_alg sha256_alg_nano = {
}
};
+static struct x86_cpu_id padlock_sha_ids[] = {
+ X86_FEATURE_MATCH(X86_FEATURE_PHE),
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, padlock_sha_ids);
+
static int __init padlock_init(void)
{
int rc = -ENODEV;
@@ -533,15 +540,8 @@ static int __init padlock_init(void)
struct shash_alg *sha1;
struct shash_alg *sha256;
- if (!cpu_has_phe) {
- printk(KERN_NOTICE PFX "VIA PadLock Hash Engine not detected.\n");
- return -ENODEV;
- }
-
- if (!cpu_has_phe_enabled) {
- printk(KERN_NOTICE PFX "VIA PadLock detected, but not enabled. Hmm, strange...\n");
+ if (!x86_match_cpu(padlock_sha_ids) || !cpu_has_phe_enabled)
return -ENODEV;
- }
/* Register the newly added algorithm module if on *
* VIA Nano processor, or else just do as before */
diff --git a/drivers/hid/hid-core.c b/drivers/hid/hid-core.c
index af08ce7207d..bce53fa0e16 100644
--- a/drivers/hid/hid-core.c
+++ b/drivers/hid/hid-core.c
@@ -1619,11 +1619,7 @@ static ssize_t store_new_id(struct device_driver *drv, const char *buf,
list_add_tail(&dynid->list, &hdrv->dyn_list);
spin_unlock(&hdrv->dyn_lock);
- ret = 0;
- if (get_driver(&hdrv->driver)) {
- ret = driver_attach(&hdrv->driver);
- put_driver(&hdrv->driver);
- }
+ ret = driver_attach(&hdrv->driver);
return ret ? : count;
}
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 36484db36ba..9ffbfc575a0 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -37,81 +37,6 @@ struct vmbus_channel_message_table_entry {
void (*message_handler)(struct vmbus_channel_message_header *msg);
};
-#define MAX_MSG_TYPES 4
-#define MAX_NUM_DEVICE_CLASSES_SUPPORTED 8
-
-static const uuid_le
- supported_device_classes[MAX_NUM_DEVICE_CLASSES_SUPPORTED] = {
- /* {ba6163d9-04a1-4d29-b605-72e2ffb1dc7f} */
- /* Storage - SCSI */
- {
- .b = {
- 0xd9, 0x63, 0x61, 0xba, 0xa1, 0x04, 0x29, 0x4d,
- 0xb6, 0x05, 0x72, 0xe2, 0xff, 0xb1, 0xdc, 0x7f
- }
- },
-
- /* {F8615163-DF3E-46c5-913F-F2D2F965ED0E} */
- /* Network */
- {
- .b = {
- 0x63, 0x51, 0x61, 0xF8, 0x3E, 0xDF, 0xc5, 0x46,
- 0x91, 0x3F, 0xF2, 0xD2, 0xF9, 0x65, 0xED, 0x0E
- }
- },
-
- /* {CFA8B69E-5B4A-4cc0-B98B-8BA1A1F3F95A} */
- /* Input */
- {
- .b = {
- 0x9E, 0xB6, 0xA8, 0xCF, 0x4A, 0x5B, 0xc0, 0x4c,
- 0xB9, 0x8B, 0x8B, 0xA1, 0xA1, 0xF3, 0xF9, 0x5A
- }
- },
-
- /* {32412632-86cb-44a2-9b5c-50d1417354f5} */
- /* IDE */
- {
- .b = {
- 0x32, 0x26, 0x41, 0x32, 0xcb, 0x86, 0xa2, 0x44,
- 0x9b, 0x5c, 0x50, 0xd1, 0x41, 0x73, 0x54, 0xf5
- }
- },
- /* 0E0B6031-5213-4934-818B-38D90CED39DB */
- /* Shutdown */
- {
- .b = {
- 0x31, 0x60, 0x0B, 0X0E, 0x13, 0x52, 0x34, 0x49,
- 0x81, 0x8B, 0x38, 0XD9, 0x0C, 0xED, 0x39, 0xDB
- }
- },
- /* {9527E630-D0AE-497b-ADCE-E80AB0175CAF} */
- /* TimeSync */
- {
- .b = {
- 0x30, 0xe6, 0x27, 0x95, 0xae, 0xd0, 0x7b, 0x49,
- 0xad, 0xce, 0xe8, 0x0a, 0xb0, 0x17, 0x5c, 0xaf
- }
- },
- /* {57164f39-9115-4e78-ab55-382f3bd5422d} */
- /* Heartbeat */
- {
- .b = {
- 0x39, 0x4f, 0x16, 0x57, 0x15, 0x91, 0x78, 0x4e,
- 0xab, 0x55, 0x38, 0x2f, 0x3b, 0xd5, 0x42, 0x2d
- }
- },
- /* {A9A0F4E7-5A45-4d96-B827-8A841E8C03E6} */
- /* KVP */
- {
- .b = {
- 0xe7, 0xf4, 0xa0, 0xa9, 0x45, 0x5a, 0x96, 0x4d,
- 0xb8, 0x27, 0x8a, 0x84, 0x1e, 0x8c, 0x3, 0xe6
- }
- },
-
-};
-
/**
* vmbus_prep_negotiate_resp() - Create default response for Hyper-V Negotiate message
@@ -321,20 +246,8 @@ static void vmbus_onoffer(struct vmbus_channel_message_header *hdr)
struct vmbus_channel *newchannel;
uuid_le *guidtype;
uuid_le *guidinstance;
- int i;
- int fsupported = 0;
offer = (struct vmbus_channel_offer_channel *)hdr;
- for (i = 0; i < MAX_NUM_DEVICE_CLASSES_SUPPORTED; i++) {
- if (!uuid_le_cmp(offer->offer.if_type,
- supported_device_classes[i])) {
- fsupported = 1;
- break;
- }
- }
-
- if (!fsupported)
- return;
guidtype = &offer->offer.if_type;
guidinstance = &offer->offer.if_instance;
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c
index 12aa97f31f9..15956bd48b4 100644
--- a/drivers/hv/hv.c
+++ b/drivers/hv/hv.c
@@ -155,9 +155,9 @@ int hv_init(void)
union hv_x64_msr_hypercall_contents hypercall_msr;
void *virtaddr = NULL;
- memset(hv_context.synic_event_page, 0, sizeof(void *) * MAX_NUM_CPUS);
+ memset(hv_context.synic_event_page, 0, sizeof(void *) * NR_CPUS);
memset(hv_context.synic_message_page, 0,
- sizeof(void *) * MAX_NUM_CPUS);
+ sizeof(void *) * NR_CPUS);
if (!query_hypervisor_presence())
goto cleanup;
diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c
index 0e8343f585b..6186025209c 100644
--- a/drivers/hv/hv_kvp.c
+++ b/drivers/hv/hv_kvp.c
@@ -28,8 +28,6 @@
#include <linux/workqueue.h>
#include <linux/hyperv.h>
-#include "hv_kvp.h"
-
/*
@@ -44,9 +42,10 @@
static struct {
bool active; /* transaction status - active or not */
int recv_len; /* number of bytes received. */
- int index; /* current index */
+ struct hv_kvp_msg *kvp_msg; /* current message */
struct vmbus_channel *recv_channel; /* chn we got the request */
u64 recv_req_id; /* request ID. */
+ void *kvp_context; /* for the channel callback */
} kvp_transaction;
static void kvp_send_key(struct work_struct *dummy);
@@ -73,15 +72,20 @@ kvp_register(void)
{
struct cn_msg *msg;
+ struct hv_kvp_msg *kvp_msg;
+ char *version;
- msg = kzalloc(sizeof(*msg) + strlen(HV_DRV_VERSION) + 1 , GFP_ATOMIC);
+ msg = kzalloc(sizeof(*msg) + sizeof(struct hv_kvp_msg), GFP_ATOMIC);
if (msg) {
+ kvp_msg = (struct hv_kvp_msg *)msg->data;
+ version = kvp_msg->body.kvp_register.version;
msg->id.idx = CN_KVP_IDX;
msg->id.val = CN_KVP_VAL;
- msg->seq = KVP_REGISTER;
- strcpy(msg->data, HV_DRV_VERSION);
- msg->len = strlen(HV_DRV_VERSION) + 1;
+
+ kvp_msg->kvp_hdr.operation = KVP_OP_REGISTER;
+ strcpy(version, HV_DRV_VERSION);
+ msg->len = sizeof(struct hv_kvp_msg);
cn_netlink_send(msg, 0, GFP_ATOMIC);
kfree(msg);
}
@@ -103,23 +107,28 @@ kvp_work_func(struct work_struct *dummy)
static void
kvp_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp)
{
- struct hv_ku_msg *message;
+ struct hv_kvp_msg *message;
+ struct hv_kvp_msg_enumerate *data;
- message = (struct hv_ku_msg *)msg->data;
- if (msg->seq == KVP_REGISTER) {
+ message = (struct hv_kvp_msg *)msg->data;
+ switch (message->kvp_hdr.operation) {
+ case KVP_OP_REGISTER:
pr_info("KVP: user-mode registering done.\n");
kvp_register();
- }
+ kvp_transaction.active = false;
+ hv_kvp_onchannelcallback(kvp_transaction.kvp_context);
+ break;
- if (msg->seq == KVP_USER_SET) {
+ default:
+ data = &message->body.kvp_enum_data;
/*
* Complete the transaction by forwarding the key value
* to the host. But first, cancel the timeout.
*/
if (cancel_delayed_work_sync(&kvp_work))
- kvp_respond_to_host(message->kvp_key,
- message->kvp_value,
- !strlen(message->kvp_key));
+ kvp_respond_to_host(data->data.key,
+ data->data.value,
+ !strlen(data->data.key));
}
}
@@ -127,19 +136,105 @@ static void
kvp_send_key(struct work_struct *dummy)
{
struct cn_msg *msg;
- int index = kvp_transaction.index;
+ struct hv_kvp_msg *message;
+ struct hv_kvp_msg *in_msg;
+ __u8 operation = kvp_transaction.kvp_msg->kvp_hdr.operation;
+ __u8 pool = kvp_transaction.kvp_msg->kvp_hdr.pool;
+ __u32 val32;
+ __u64 val64;
msg = kzalloc(sizeof(*msg) + sizeof(struct hv_kvp_msg) , GFP_ATOMIC);
+ if (!msg)
+ return;
- if (msg) {
- msg->id.idx = CN_KVP_IDX;
- msg->id.val = CN_KVP_VAL;
- msg->seq = KVP_KERNEL_GET;
- ((struct hv_ku_msg *)msg->data)->kvp_index = index;
- msg->len = sizeof(struct hv_ku_msg);
- cn_netlink_send(msg, 0, GFP_ATOMIC);
- kfree(msg);
+ msg->id.idx = CN_KVP_IDX;
+ msg->id.val = CN_KVP_VAL;
+
+ message = (struct hv_kvp_msg *)msg->data;
+ message->kvp_hdr.operation = operation;
+ message->kvp_hdr.pool = pool;
+ in_msg = kvp_transaction.kvp_msg;
+
+ /*
+ * The key/value strings sent from the host are encoded in
+ * in utf16; convert it to utf8 strings.
+ * The host assures us that the utf16 strings will not exceed
+ * the max lengths specified. We will however, reserve room
+ * for the string terminating character - in the utf16s_utf8s()
+ * function we limit the size of the buffer where the converted
+ * string is placed to HV_KVP_EXCHANGE_MAX_*_SIZE -1 to gaurantee
+ * that the strings can be properly terminated!
+ */
+
+ switch (message->kvp_hdr.operation) {
+ case KVP_OP_SET:
+ switch (in_msg->body.kvp_set.data.value_type) {
+ case REG_SZ:
+ /*
+ * The value is a string - utf16 encoding.
+ */
+ message->body.kvp_set.data.value_size =
+ utf16s_to_utf8s(
+ (wchar_t *)in_msg->body.kvp_set.data.value,
+ in_msg->body.kvp_set.data.value_size,
+ UTF16_LITTLE_ENDIAN,
+ message->body.kvp_set.data.value,
+ HV_KVP_EXCHANGE_MAX_VALUE_SIZE - 1) + 1;
+ break;
+
+ case REG_U32:
+ /*
+ * The value is a 32 bit scalar.
+ * We save this as a utf8 string.
+ */
+ val32 = in_msg->body.kvp_set.data.value_u32;
+ message->body.kvp_set.data.value_size =
+ sprintf(message->body.kvp_set.data.value,
+ "%d", val32) + 1;
+ break;
+
+ case REG_U64:
+ /*
+ * The value is a 64 bit scalar.
+ * We save this as a utf8 string.
+ */
+ val64 = in_msg->body.kvp_set.data.value_u64;
+ message->body.kvp_set.data.value_size =
+ sprintf(message->body.kvp_set.data.value,
+ "%llu", val64) + 1;
+ break;
+
+ }
+ case KVP_OP_GET:
+ message->body.kvp_set.data.key_size =
+ utf16s_to_utf8s(
+ (wchar_t *)in_msg->body.kvp_set.data.key,
+ in_msg->body.kvp_set.data.key_size,
+ UTF16_LITTLE_ENDIAN,
+ message->body.kvp_set.data.key,
+ HV_KVP_EXCHANGE_MAX_KEY_SIZE - 1) + 1;
+ break;
+
+ case KVP_OP_DELETE:
+ message->body.kvp_delete.key_size =
+ utf16s_to_utf8s(
+ (wchar_t *)in_msg->body.kvp_delete.key,
+ in_msg->body.kvp_delete.key_size,
+ UTF16_LITTLE_ENDIAN,
+ message->body.kvp_delete.key,
+ HV_KVP_EXCHANGE_MAX_KEY_SIZE - 1) + 1;
+ break;
+
+ case KVP_OP_ENUMERATE:
+ message->body.kvp_enum_data.index =
+ in_msg->body.kvp_enum_data.index;
+ break;
}
+
+ msg->len = sizeof(struct hv_kvp_msg);
+ cn_netlink_send(msg, 0, GFP_ATOMIC);
+ kfree(msg);
+
return;
}
@@ -151,10 +246,11 @@ static void
kvp_respond_to_host(char *key, char *value, int error)
{
struct hv_kvp_msg *kvp_msg;
- struct hv_kvp_msg_enumerate *kvp_data;
+ struct hv_kvp_exchg_msg_value *kvp_data;
char *key_name;
struct icmsg_hdr *icmsghdrp;
- int keylen, valuelen;
+ int keylen = 0;
+ int valuelen = 0;
u32 buf_len;
struct vmbus_channel *channel;
u64 req_id;
@@ -181,6 +277,9 @@ kvp_respond_to_host(char *key, char *value, int error)
kvp_transaction.active = false;
+ icmsghdrp = (struct icmsg_hdr *)
+ &recv_buffer[sizeof(struct vmbuspipe_hdr)];
+
if (channel->onchannel_callback == NULL)
/*
* We have raced with util driver being unloaded;
@@ -188,41 +287,67 @@ kvp_respond_to_host(char *key, char *value, int error)
*/
return;
- icmsghdrp = (struct icmsg_hdr *)
- &recv_buffer[sizeof(struct vmbuspipe_hdr)];
- kvp_msg = (struct hv_kvp_msg *)
- &recv_buffer[sizeof(struct vmbuspipe_hdr) +
- sizeof(struct icmsg_hdr)];
- kvp_data = &kvp_msg->kvp_data;
- key_name = key;
/*
- * If the error parameter is set, terminate the host's enumeration.
+ * If the error parameter is set, terminate the host's enumeration
+ * on this pool.
*/
if (error) {
/*
- * We don't support this index or the we have timedout;
- * terminate the host-side iteration by returning an error.
+ * Something failed or the we have timedout;
+ * terminate the current host-side iteration.
*/
- icmsghdrp->status = HV_E_FAIL;
+ icmsghdrp->status = HV_S_CONT;
goto response_done;
}
+ icmsghdrp->status = HV_S_OK;
+
+ kvp_msg = (struct hv_kvp_msg *)
+ &recv_buffer[sizeof(struct vmbuspipe_hdr) +
+ sizeof(struct icmsg_hdr)];
+
+ switch (kvp_transaction.kvp_msg->kvp_hdr.operation) {
+ case KVP_OP_GET:
+ kvp_data = &kvp_msg->body.kvp_get.data;
+ goto copy_value;
+
+ case KVP_OP_SET:
+ case KVP_OP_DELETE:
+ goto response_done;
+
+ default:
+ break;
+ }
+
+ kvp_data = &kvp_msg->body.kvp_enum_data.data;
+ key_name = key;
+
/*
* The windows host expects the key/value pair to be encoded
- * in utf16.
+ * in utf16. Ensure that the key/value size reported to the host
+ * will be less than or equal to the MAX size (including the
+ * terminating character).
*/
keylen = utf8s_to_utf16s(key_name, strlen(key_name), UTF16_HOST_ENDIAN,
- (wchar_t *) kvp_data->data.key,
- HV_KVP_EXCHANGE_MAX_KEY_SIZE / 2);
- kvp_data->data.key_size = 2*(keylen + 1); /* utf16 encoding */
+ (wchar_t *) kvp_data->key,
+ (HV_KVP_EXCHANGE_MAX_KEY_SIZE / 2) - 2);
+ kvp_data->key_size = 2*(keylen + 1); /* utf16 encoding */
+
+copy_value:
valuelen = utf8s_to_utf16s(value, strlen(value), UTF16_HOST_ENDIAN,
- (wchar_t *) kvp_data->data.value,
- HV_KVP_EXCHANGE_MAX_VALUE_SIZE / 2);
- kvp_data->data.value_size = 2*(valuelen + 1); /* utf16 encoding */
+ (wchar_t *) kvp_data->value,
+ (HV_KVP_EXCHANGE_MAX_VALUE_SIZE / 2) - 2);
+ kvp_data->value_size = 2*(valuelen + 1); /* utf16 encoding */
- kvp_data->data.value_type = REG_SZ; /* all our values are strings */
- icmsghdrp->status = HV_S_OK;
+ /*
+ * If the utf8s to utf16s conversion failed; notify host
+ * of the error.
+ */
+ if ((keylen < 0) || (valuelen < 0))
+ icmsghdrp->status = HV_E_FAIL;
+
+ kvp_data->value_type = REG_SZ; /* all our values are strings */
response_done:
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE;
@@ -249,11 +374,18 @@ void hv_kvp_onchannelcallback(void *context)
u64 requestid;
struct hv_kvp_msg *kvp_msg;
- struct hv_kvp_msg_enumerate *kvp_data;
struct icmsg_hdr *icmsghdrp;
struct icmsg_negotiate *negop = NULL;
+ if (kvp_transaction.active) {
+ /*
+ * We will defer processing this callback once
+ * the current transaction is complete.
+ */
+ kvp_transaction.kvp_context = context;
+ return;
+ }
vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE, &recvlen, &requestid);
@@ -268,29 +400,16 @@ void hv_kvp_onchannelcallback(void *context)
sizeof(struct vmbuspipe_hdr) +
sizeof(struct icmsg_hdr)];
- kvp_data = &kvp_msg->kvp_data;
-
- /*
- * We only support the "get" operation on
- * "KVP_POOL_AUTO" pool.
- */
-
- if ((kvp_msg->kvp_hdr.pool != KVP_POOL_AUTO) ||
- (kvp_msg->kvp_hdr.operation !=
- KVP_OP_ENUMERATE)) {
- icmsghdrp->status = HV_E_FAIL;
- goto callback_done;
- }
-
/*
* Stash away this global state for completing the
* transaction; note transactions are serialized.
*/
+
kvp_transaction.recv_len = recvlen;
kvp_transaction.recv_channel = channel;
kvp_transaction.recv_req_id = requestid;
kvp_transaction.active = true;
- kvp_transaction.index = kvp_data->index;
+ kvp_transaction.kvp_msg = kvp_msg;
/*
* Get the information from the
@@ -308,8 +427,6 @@ void hv_kvp_onchannelcallback(void *context)
}
-callback_done:
-
icmsghdrp->icflags = ICMSGHDRFLAG_TRANSACTION
| ICMSGHDRFLAG_RESPONSE;
@@ -330,6 +447,14 @@ hv_kvp_init(struct hv_util_service *srv)
return err;
recv_buffer = srv->recv_buffer;
+ /*
+ * When this driver loads, the user level daemon that
+ * processes the host requests may not yet be running.
+ * Defer processing channel callbacks until the daemon
+ * has registered.
+ */
+ kvp_transaction.active = true;
+
return 0;
}
diff --git a/drivers/hv/hv_kvp.h b/drivers/hv/hv_kvp.h
deleted file mode 100644
index 9b765d7df83..00000000000
--- a/drivers/hv/hv_kvp.h
+++ /dev/null
@@ -1,184 +0,0 @@
-/*
- * An implementation of HyperV key value pair (KVP) functionality for Linux.
- *
- *
- * Copyright (C) 2010, Novell, Inc.
- * Author : K. Y. Srinivasan <ksrinivasan@novell.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
- * NON INFRINGEMENT. See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- */
-#ifndef _KVP_H
-#define _KVP_H_
-
-/*
- * Maximum value size - used for both key names and value data, and includes
- * any applicable NULL terminators.
- *
- * Note: This limit is somewhat arbitrary, but falls easily within what is
- * supported for all native guests (back to Win 2000) and what is reasonable
- * for the IC KVP exchange functionality. Note that Windows Me/98/95 are
- * limited to 255 character key names.
- *
- * MSDN recommends not storing data values larger than 2048 bytes in the
- * registry.
- *
- * Note: This value is used in defining the KVP exchange message - this value
- * cannot be modified without affecting the message size and compatibility.
- */
-
-/*
- * bytes, including any null terminators
- */
-#define HV_KVP_EXCHANGE_MAX_VALUE_SIZE (2048)
-
-
-/*
- * Maximum key size - the registry limit for the length of an entry name
- * is 256 characters, including the null terminator
- */
-
-#define HV_KVP_EXCHANGE_MAX_KEY_SIZE (512)
-
-/*
- * In Linux, we implement the KVP functionality in two components:
- * 1) The kernel component which is packaged as part of the hv_utils driver
- * is responsible for communicating with the host and responsible for
- * implementing the host/guest protocol. 2) A user level daemon that is
- * responsible for data gathering.
- *
- * Host/Guest Protocol: The host iterates over an index and expects the guest
- * to assign a key name to the index and also return the value corresponding to
- * the key. The host will have atmost one KVP transaction outstanding at any
- * given point in time. The host side iteration stops when the guest returns
- * an error. Microsoft has specified the following mapping of key names to
- * host specified index:
- *
- * Index Key Name
- * 0 FullyQualifiedDomainName
- * 1 IntegrationServicesVersion
- * 2 NetworkAddressIPv4
- * 3 NetworkAddressIPv6
- * 4 OSBuildNumber
- * 5 OSName
- * 6 OSMajorVersion
- * 7 OSMinorVersion
- * 8 OSVersion
- * 9 ProcessorArchitecture
- *
- * The Windows host expects the Key Name and Key Value to be encoded in utf16.
- *
- * Guest Kernel/KVP Daemon Protocol: As noted earlier, we implement all of the
- * data gathering functionality in a user mode daemon. The user level daemon
- * is also responsible for binding the key name to the index as well. The
- * kernel and user-level daemon communicate using a connector channel.
- *
- * The user mode component first registers with the
- * the kernel component. Subsequently, the kernel component requests, data
- * for the specified keys. In response to this message the user mode component
- * fills in the value corresponding to the specified key. We overload the
- * sequence field in the cn_msg header to define our KVP message types.
- *
- *
- * The kernel component simply acts as a conduit for communication between the
- * Windows host and the user-level daemon. The kernel component passes up the
- * index received from the Host to the user-level daemon. If the index is
- * valid (supported), the corresponding key as well as its
- * value (both are strings) is returned. If the index is invalid
- * (not supported), a NULL key string is returned.
- */
-
-/*
- *
- * The following definitions are shared with the user-mode component; do not
- * change any of this without making the corresponding changes in
- * the KVP user-mode component.
- */
-
-#define CN_KVP_VAL 0x1 /* This supports queries from the kernel */
-#define CN_KVP_USER_VAL 0x2 /* This supports queries from the user */
-
-enum hv_ku_op {
- KVP_REGISTER = 0, /* Register the user mode component */
- KVP_KERNEL_GET, /* Kernel is requesting the value */
- KVP_KERNEL_SET, /* Kernel is providing the value */
- KVP_USER_GET, /* User is requesting the value */
- KVP_USER_SET /* User is providing the value */
-};
-
-struct hv_ku_msg {
- __u32 kvp_index; /* Key index */
- __u8 kvp_key[HV_KVP_EXCHANGE_MAX_KEY_SIZE]; /* Key name */
- __u8 kvp_value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE]; /* Key value */
-};
-
-
-
-
-#ifdef __KERNEL__
-
-/*
- * Registry value types.
- */
-
-#define REG_SZ 1
-
-enum hv_kvp_exchg_op {
- KVP_OP_GET = 0,
- KVP_OP_SET,
- KVP_OP_DELETE,
- KVP_OP_ENUMERATE,
- KVP_OP_COUNT /* Number of operations, must be last. */
-};
-
-enum hv_kvp_exchg_pool {
- KVP_POOL_EXTERNAL = 0,
- KVP_POOL_GUEST,
- KVP_POOL_AUTO,
- KVP_POOL_AUTO_EXTERNAL,
- KVP_POOL_AUTO_INTERNAL,
- KVP_POOL_COUNT /* Number of pools, must be last. */
-};
-
-struct hv_kvp_hdr {
- u8 operation;
- u8 pool;
-};
-
-struct hv_kvp_exchg_msg_value {
- u32 value_type;
- u32 key_size;
- u32 value_size;
- u8 key[HV_KVP_EXCHANGE_MAX_KEY_SIZE];
- u8 value[HV_KVP_EXCHANGE_MAX_VALUE_SIZE];
-};
-
-struct hv_kvp_msg_enumerate {
- u32 index;
- struct hv_kvp_exchg_msg_value data;
-};
-
-struct hv_kvp_msg {
- struct hv_kvp_hdr kvp_hdr;
- struct hv_kvp_msg_enumerate kvp_data;
-};
-
-int hv_kvp_init(struct hv_util_service *);
-void hv_kvp_deinit(void);
-void hv_kvp_onchannelcallback(void *);
-
-#endif /* __KERNEL__ */
-#endif /* _KVP_H */
-
diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c
index 55d58f21e6d..dbb8b8eec21 100644
--- a/drivers/hv/hv_util.c
+++ b/drivers/hv/hv_util.c
@@ -28,9 +28,6 @@
#include <linux/reboot.h>
#include <linux/hyperv.h>
-#include "hv_kvp.h"
-
-
static void shutdown_onchannelcallback(void *context);
static struct hv_util_service util_shutdown = {
.util_cb = shutdown_onchannelcallback,
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index 6d7d286d544..699f0d8e59e 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -457,7 +457,6 @@ static const uuid_le VMBUS_SERVICE_ID = {
},
};
-#define MAX_NUM_CPUS 32
struct hv_input_signal_event_buffer {
@@ -483,8 +482,8 @@ struct hv_context {
/* 8-bytes aligned of the buffer above */
struct hv_input_signal_event *signal_event_param;
- void *synic_message_page[MAX_NUM_CPUS];
- void *synic_event_page[MAX_NUM_CPUS];
+ void *synic_message_page[NR_CPUS];
+ void *synic_event_page[NR_CPUS];
};
extern struct hv_context hv_context;
diff --git a/drivers/hwmon/coretemp.c b/drivers/hwmon/coretemp.c
index a6c6ec36615..249ac460e3d 100644
--- a/drivers/hwmon/coretemp.c
+++ b/drivers/hwmon/coretemp.c
@@ -39,6 +39,7 @@
#include <linux/moduleparam.h>
#include <asm/msr.h>
#include <asm/processor.h>
+#include <asm/cpu_device_id.h>
#define DRVNAME "coretemp"
@@ -759,13 +760,23 @@ static struct notifier_block coretemp_cpu_notifier __refdata = {
.notifier_call = coretemp_cpu_callback,
};
+static const struct x86_cpu_id coretemp_ids[] = {
+ { X86_VENDOR_INTEL, X86_FAMILY_ANY, X86_MODEL_ANY, X86_FEATURE_DTS },
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, coretemp_ids);
+
static int __init coretemp_init(void)
{
int i, err = -ENODEV;
- /* quick check if we run Intel */
- if (cpu_data(0).x86_vendor != X86_VENDOR_INTEL)
- goto exit;
+ /*
+ * CPUID.06H.EAX[0] indicates whether the CPU has thermal
+ * sensors. We check this bit only, all the early CPUs
+ * without thermal sensors will be filtered out.
+ */
+ if (!x86_match_cpu(coretemp_ids))
+ return -ENODEV;
err = platform_driver_register(&coretemp_driver);
if (err)
diff --git a/drivers/hwmon/via-cputemp.c b/drivers/hwmon/via-cputemp.c
index 8eac67d769f..8689664ef03 100644
--- a/drivers/hwmon/via-cputemp.c
+++ b/drivers/hwmon/via-cputemp.c
@@ -37,6 +37,7 @@
#include <linux/cpu.h>
#include <asm/msr.h>
#include <asm/processor.h>
+#include <asm/cpu_device_id.h>
#define DRVNAME "via_cputemp"
@@ -308,15 +309,20 @@ static struct notifier_block via_cputemp_cpu_notifier __refdata = {
.notifier_call = via_cputemp_cpu_callback,
};
+static const struct x86_cpu_id cputemp_ids[] = {
+ { X86_VENDOR_CENTAUR, 6, 0xa, }, /* C7 A */
+ { X86_VENDOR_CENTAUR, 6, 0xd, }, /* C7 D */
+ { X86_VENDOR_CENTAUR, 6, 0xf, }, /* Nano */
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, cputemp_ids);
+
static int __init via_cputemp_init(void)
{
int i, err;
- if (cpu_data(0).x86_vendor != X86_VENDOR_CENTAUR) {
- printk(KERN_DEBUG DRVNAME ": Not a VIA CPU\n");
- err = -ENODEV;
- goto exit;
- }
+ if (!x86_match_cpu(cputemp_ids))
+ return -ENODEV;
err = platform_driver_register(&via_cputemp_driver);
if (err)
diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 54ab97bae04..1c15e9b3357 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -62,6 +62,7 @@
#include <linux/notifier.h>
#include <linux/cpu.h>
#include <linux/module.h>
+#include <asm/cpu_device_id.h>
#include <asm/mwait.h>
#include <asm/msr.h>
@@ -81,6 +82,17 @@ static unsigned int mwait_substates;
/* Reliable LAPIC Timer States, bit 1 for C1 etc. */
static unsigned int lapic_timer_reliable_states = (1 << 1); /* Default to only C1 */
+struct idle_cpu {
+ struct cpuidle_state *state_table;
+
+ /*
+ * Hardware C-state auto-demotion may not always be optimal.
+ * Indicate which enable bits to clear here.
+ */
+ unsigned long auto_demotion_disable_flags;
+};
+
+static const struct idle_cpu *icpu;
static struct cpuidle_device __percpu *intel_idle_cpuidle_devices;
static int intel_idle(struct cpuidle_device *dev,
struct cpuidle_driver *drv, int index);
@@ -88,12 +100,6 @@ static int intel_idle(struct cpuidle_device *dev,
static struct cpuidle_state *cpuidle_state_table;
/*
- * Hardware C-state auto-demotion may not always be optimal.
- * Indicate which enable bits to clear here.
- */
-static unsigned long long auto_demotion_disable_flags;
-
-/*
* Set this flag for states where the HW flushes the TLB for us
* and so we don't need cross-calls to keep it consistent.
* If this flag is set, SW flushes the TLB, so even if the
@@ -319,27 +325,68 @@ static void auto_demotion_disable(void *dummy)
unsigned long long msr_bits;
rdmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits);
- msr_bits &= ~auto_demotion_disable_flags;
+ msr_bits &= ~(icpu->auto_demotion_disable_flags);
wrmsrl(MSR_NHM_SNB_PKG_CST_CFG_CTL, msr_bits);
}
+static const struct idle_cpu idle_cpu_nehalem = {
+ .state_table = nehalem_cstates,
+ .auto_demotion_disable_flags = NHM_C1_AUTO_DEMOTE | NHM_C3_AUTO_DEMOTE,
+};
+
+static const struct idle_cpu idle_cpu_atom = {
+ .state_table = atom_cstates,
+};
+
+static const struct idle_cpu idle_cpu_lincroft = {
+ .state_table = atom_cstates,
+ .auto_demotion_disable_flags = ATM_LNC_C6_AUTO_DEMOTE,
+};
+
+static const struct idle_cpu idle_cpu_snb = {
+ .state_table = snb_cstates,
+};
+
+#define ICPU(model, cpu) \
+ { X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
+
+static const struct x86_cpu_id intel_idle_ids[] = {
+ ICPU(0x1a, idle_cpu_nehalem),
+ ICPU(0x1e, idle_cpu_nehalem),
+ ICPU(0x1f, idle_cpu_nehalem),
+ ICPU(0x25, idle_cpu_nehalem),
+ ICPU(0x2c, idle_cpu_nehalem),
+ ICPU(0x2e, idle_cpu_nehalem),
+ ICPU(0x1c, idle_cpu_atom),
+ ICPU(0x26, idle_cpu_lincroft),
+ ICPU(0x2f, idle_cpu_nehalem),
+ ICPU(0x2a, idle_cpu_snb),
+ ICPU(0x2d, idle_cpu_snb),
+ {}
+};
+MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);
+
/*
* intel_idle_probe()
*/
static int intel_idle_probe(void)
{
unsigned int eax, ebx, ecx;
+ const struct x86_cpu_id *id;
if (max_cstate == 0) {
pr_debug(PREFIX "disabled\n");
return -EPERM;
}
- if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL)
- return -ENODEV;
-
- if (!boot_cpu_has(X86_FEATURE_MWAIT))
+ id = x86_match_cpu(intel_idle_ids);
+ if (!id) {
+ if (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL &&
+ boot_cpu_data.x86 == 6)
+ pr_debug(PREFIX "does not run on family %d model %d\n",
+ boot_cpu_data.x86, boot_cpu_data.x86_model);
return -ENODEV;
+ }
if (boot_cpu_data.cpuid_level < CPUID_MWAIT_LEAF)
return -ENODEV;
@@ -353,43 +400,8 @@ static int intel_idle_probe(void)
pr_debug(PREFIX "MWAIT substates: 0x%x\n", mwait_substates);
-
- if (boot_cpu_data.x86 != 6) /* family 6 */
- return -ENODEV;
-
- switch (boot_cpu_data.x86_model) {
-
- case 0x1A: /* Core i7, Xeon 5500 series */
- case 0x1E: /* Core i7 and i5 Processor - Lynnfield Jasper Forest */
- case 0x1F: /* Core i7 and i5 Processor - Nehalem */
- case 0x2E: /* Nehalem-EX Xeon */
- case 0x2F: /* Westmere-EX Xeon */
- case 0x25: /* Westmere */
- case 0x2C: /* Westmere */
- cpuidle_state_table = nehalem_cstates;
- auto_demotion_disable_flags =
- (NHM_C1_AUTO_DEMOTE | NHM_C3_AUTO_DEMOTE);
- break;
-
- case 0x1C: /* 28 - Atom Processor */
- cpuidle_state_table = atom_cstates;
- break;
-
- case 0x26: /* 38 - Lincroft Atom Processor */
- cpuidle_state_table = atom_cstates;
- auto_demotion_disable_flags = ATM_LNC_C6_AUTO_DEMOTE;
- break;
-
- case 0x2A: /* SNB */
- case 0x2D: /* SNB Xeon */
- cpuidle_state_table = snb_cstates;
- break;
-
- default:
- pr_debug(PREFIX "does not run on family %d model %d\n",
- boot_cpu_data.x86, boot_cpu_data.x86_model);
- return -ENODEV;
- }
+ icpu = (const struct idle_cpu *)id->driver_data;
+ cpuidle_state_table = icpu->state_table;
if (boot_cpu_has(X86_FEATURE_ARAT)) /* Always Reliable APIC Timer */
lapic_timer_reliable_states = LAPIC_TIMER_ALWAYS_RELIABLE;
@@ -470,7 +482,7 @@ static int intel_idle_cpuidle_driver_init(void)
drv->state_count += 1;
}
- if (auto_demotion_disable_flags)
+ if (icpu->auto_demotion_disable_flags)
on_each_cpu(auto_demotion_disable, NULL, 1);
return 0;
@@ -522,7 +534,7 @@ int intel_idle_cpu_init(int cpu)
return -EIO;
}
- if (auto_demotion_disable_flags)
+ if (icpu->auto_demotion_disable_flags)
smp_call_function_single(cpu, auto_demotion_disable, NULL, 1);
return 0;
diff --git a/drivers/input/gameport/gameport.c b/drivers/input/gameport/gameport.c
index c351aa421f8..da739d9d190 100644
--- a/drivers/input/gameport/gameport.c
+++ b/drivers/input/gameport/gameport.c
@@ -449,7 +449,6 @@ static ssize_t gameport_rebind_driver(struct device *dev, struct device_attribut
} else if ((drv = driver_find(buf, &gameport_bus)) != NULL) {
gameport_disconnect_port(gameport);
error = gameport_bind_driver(gameport, to_gameport_driver(drv));
- put_driver(drv);
} else {
error = -EINVAL;
}
diff --git a/drivers/input/serio/serio.c b/drivers/input/serio/serio.c
index ba70058e2be..d0f7533dbf8 100644
--- a/drivers/input/serio/serio.c
+++ b/drivers/input/serio/serio.c
@@ -441,7 +441,6 @@ static ssize_t serio_rebind_driver(struct device *dev, struct device_attribute *
} else if ((drv = driver_find(buf, &serio_bus)) != NULL) {
serio_disconnect_port(serio);
error = serio_bind_driver(serio, to_serio_driver(drv));
- put_driver(drv);
serio_remove_duplicate_events(serio, SERIO_RESCAN_PORT);
} else {
error = -EINVAL;
diff --git a/drivers/media/video/cx18/cx18-alsa-main.c b/drivers/media/video/cx18/cx18-alsa-main.c
index a1e6c2a3247..e118361c2e7 100644
--- a/drivers/media/video/cx18/cx18-alsa-main.c
+++ b/drivers/media/video/cx18/cx18-alsa-main.c
@@ -285,7 +285,6 @@ static void __exit cx18_alsa_exit(void)
drv = driver_find("cx18", &pci_bus_type);
ret = driver_for_each_device(drv, NULL, NULL, cx18_alsa_exit_callback);
- put_driver(drv);
cx18_ext_init = NULL;
printk(KERN_INFO "cx18-alsa: module unload complete\n");
diff --git a/drivers/media/video/ivtv/ivtvfb.c b/drivers/media/video/ivtv/ivtvfb.c
index d0fbfcf7133..e5e7fa9e737 100644
--- a/drivers/media/video/ivtv/ivtvfb.c
+++ b/drivers/media/video/ivtv/ivtvfb.c
@@ -1293,7 +1293,6 @@ static int __init ivtvfb_init(void)
drv = driver_find("ivtv", &pci_bus_type);
err = driver_for_each_device(drv, NULL, &registered, ivtvfb_callback_init);
- put_driver(drv);
if (!registered) {
printk(KERN_ERR "ivtvfb: no cards found\n");
return -ENODEV;
@@ -1310,7 +1309,6 @@ static void ivtvfb_cleanup(void)
drv = driver_find("ivtv", &pci_bus_type);
err = driver_for_each_device(drv, NULL, NULL, ivtvfb_callback_cleanup);
- put_driver(drv);
}
module_init(ivtvfb_init);
diff --git a/drivers/media/video/s5p-fimc/fimc-mdevice.c b/drivers/media/video/s5p-fimc/fimc-mdevice.c
index 8ea4ee116e4..63eccb55728 100644
--- a/drivers/media/video/s5p-fimc/fimc-mdevice.c
+++ b/drivers/media/video/s5p-fimc/fimc-mdevice.c
@@ -344,16 +344,13 @@ static int fimc_md_register_platform_entities(struct fimc_md *fmd)
return -ENODEV;
ret = driver_for_each_device(driver, NULL, fmd,
fimc_register_callback);
- put_driver(driver);
if (ret)
return ret;
driver = driver_find(CSIS_DRIVER_NAME, &platform_bus_type);
- if (driver) {
+ if (driver)
ret = driver_for_each_device(driver, NULL, fmd,
csis_register_callback);
- put_driver(driver);
- }
return ret;
}
diff --git a/drivers/media/video/s5p-tv/mixer_video.c b/drivers/media/video/s5p-tv/mixer_video.c
index 7884baeff76..f7ca5cc143c 100644
--- a/drivers/media/video/s5p-tv/mixer_video.c
+++ b/drivers/media/video/s5p-tv/mixer_video.c
@@ -58,7 +58,6 @@ static struct v4l2_subdev *find_and_register_subdev(
}
done:
- put_driver(drv);
return sd;
}
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c
index f320f466f03..e8c42d6a7d1 100644
--- a/drivers/net/phy/phy_device.c
+++ b/drivers/net/phy/phy_device.c
@@ -915,9 +915,7 @@ static int phy_probe(struct device *dev)
phydev = to_phy_device(dev);
- /* Make sure the driver is held.
- * XXX -- Is this correct? */
- drv = get_driver(phydev->dev.driver);
+ drv = phydev->dev.driver;
phydrv = to_phy_driver(drv);
phydev->drv = phydrv;
@@ -957,8 +955,6 @@ static int phy_remove(struct device *dev)
if (phydev->drv->remove)
phydev->drv->remove(phydev);
-
- put_driver(dev->driver);
phydev->drv = NULL;
return 0;
diff --git a/drivers/pci/pci-driver.c b/drivers/pci/pci-driver.c
index 3623d65f8b8..8d9616b821c 100644
--- a/drivers/pci/pci-driver.c
+++ b/drivers/pci/pci-driver.c
@@ -72,9 +72,7 @@ int pci_add_dynid(struct pci_driver *drv,
list_add_tail(&dynid->node, &drv->dynids.list);
spin_unlock(&drv->dynids.lock);
- get_driver(&drv->driver);
retval = driver_attach(&drv->driver);
- put_driver(&drv->driver);
return retval;
}
@@ -190,43 +188,34 @@ store_remove_id(struct device_driver *driver, const char *buf, size_t count)
static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id);
static int
-pci_create_newid_file(struct pci_driver *drv)
+pci_create_newid_files(struct pci_driver *drv)
{
int error = 0;
- if (drv->probe != NULL)
- error = driver_create_file(&drv->driver, &driver_attr_new_id);
- return error;
-}
-
-static void pci_remove_newid_file(struct pci_driver *drv)
-{
- driver_remove_file(&drv->driver, &driver_attr_new_id);
-}
-static int
-pci_create_removeid_file(struct pci_driver *drv)
-{
- int error = 0;
- if (drv->probe != NULL)
- error = driver_create_file(&drv->driver,&driver_attr_remove_id);
+ if (drv->probe != NULL) {
+ error = driver_create_file(&drv->driver, &driver_attr_new_id);
+ if (error == 0) {
+ error = driver_create_file(&drv->driver,
+ &driver_attr_remove_id);
+ if (error)
+ driver_remove_file(&drv->driver,
+ &driver_attr_new_id);
+ }
+ }
return error;
}
-static void pci_remove_removeid_file(struct pci_driver *drv)
+static void pci_remove_newid_files(struct pci_driver *drv)
{
driver_remove_file(&drv->driver, &driver_attr_remove_id);
+ driver_remove_file(&drv->driver, &driver_attr_new_id);
}
#else /* !CONFIG_HOTPLUG */
-static inline int pci_create_newid_file(struct pci_driver *drv)
+static inline int pci_create_newid_files(struct pci_driver *drv)
{
return 0;
}
-static inline void pci_remove_newid_file(struct pci_driver *drv) {}
-static inline int pci_create_removeid_file(struct pci_driver *drv)
-{
- return 0;
-}
-static inline void pci_remove_removeid_file(struct pci_driver *drv) {}
+static inline void pci_remove_newid_files(struct pci_driver *drv) {}
#endif
/**
@@ -1138,18 +1127,12 @@ int __pci_register_driver(struct pci_driver *drv, struct module *owner,
if (error)
goto out;
- error = pci_create_newid_file(drv);
+ error = pci_create_newid_files(drv);
if (error)
goto out_newid;
-
- error = pci_create_removeid_file(drv);
- if (error)
- goto out_removeid;
out:
return error;
-out_removeid:
- pci_remove_newid_file(drv);
out_newid:
driver_unregister(&drv->driver);
goto out;
@@ -1168,8 +1151,7 @@ out_newid:
void
pci_unregister_driver(struct pci_driver *drv)
{
- pci_remove_removeid_file(drv);
- pci_remove_newid_file(drv);
+ pci_remove_newid_files(drv);
driver_unregister(&drv->driver);
pci_free_dynids(drv);
}
diff --git a/drivers/pci/xen-pcifront.c b/drivers/pci/xen-pcifront.c
index 1620088a0e7..40109011092 100644
--- a/drivers/pci/xen-pcifront.c
+++ b/drivers/pci/xen-pcifront.c
@@ -593,7 +593,7 @@ static pci_ers_result_t pcifront_common_process(int cmd,
}
pdrv = pcidev->driver;
- if (get_driver(&pdrv->driver)) {
+ if (pdrv) {
if (pdrv->err_handler && pdrv->err_handler->error_detected) {
dev_dbg(&pcidev->dev,
"trying to call AER service\n");
@@ -623,7 +623,6 @@ static pci_ers_result_t pcifront_common_process(int cmd,
}
}
}
- put_driver(&pdrv->driver);
}
if (!flag)
result = PCI_ERS_RESULT_NONE;
diff --git a/drivers/pcmcia/ds.c b/drivers/pcmcia/ds.c
index 1932029de48..079629bff95 100644
--- a/drivers/pcmcia/ds.c
+++ b/drivers/pcmcia/ds.c
@@ -127,10 +127,7 @@ pcmcia_store_new_id(struct device_driver *driver, const char *buf, size_t count)
list_add_tail(&dynid->node, &pdrv->dynids.list);
mutex_unlock(&pdrv->dynids.lock);
- if (get_driver(&pdrv->drv)) {
- retval = driver_attach(&pdrv->drv);
- put_driver(&pdrv->drv);
- }
+ retval = driver_attach(&pdrv->drv);
if (retval)
return retval;
@@ -160,6 +157,11 @@ pcmcia_create_newid_file(struct pcmcia_driver *drv)
return error;
}
+static void
+pcmcia_remove_newid_file(struct pcmcia_driver *drv)
+{
+ driver_remove_file(&drv->drv, &driver_attr_new_id);
+}
/**
* pcmcia_register_driver - register a PCMCIA driver with the bus core
@@ -204,6 +206,7 @@ EXPORT_SYMBOL(pcmcia_register_driver);
void pcmcia_unregister_driver(struct pcmcia_driver *driver)
{
pr_debug("unregistering driver %s\n", driver->name);
+ pcmcia_remove_newid_file(driver);
driver_unregister(&driver->drv);
pcmcia_free_dynids(driver);
}
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 3a8daf85874..459f66437fe 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -76,6 +76,20 @@ config BATTERY_DS2780
help
Say Y here to enable support for batteries with ds2780 chip.
+config BATTERY_DS2781
+ tristate "2781 battery driver"
+ depends on HAS_IOMEM
+ select W1
+ select W1_SLAVE_DS2781
+ help
+ If you enable this you will have the DS2781 battery driver support.
+
+ The battery monitor chip is used in many batteries/devices
+ as the one who is responsible for charging/discharging/monitoring
+ Li+ batteries.
+
+ If you are unsure, say N.
+
config BATTERY_DS2782
tristate "DS2782/DS2786 standalone gas-gauge"
depends on I2C
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index e429008eaf1..c590fa53340 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_TEST_POWER) += test_power.o
obj-$(CONFIG_BATTERY_DS2760) += ds2760_battery.o
obj-$(CONFIG_BATTERY_DS2780) += ds2780_battery.o
+obj-$(CONFIG_BATTERY_DS2781) += ds2781_battery.o
obj-$(CONFIG_BATTERY_DS2782) += ds2782_battery.o
obj-$(CONFIG_BATTERY_PMU) += pmu_battery.o
obj-$(CONFIG_BATTERY_OLPC) += olpc_battery.o
diff --git a/drivers/power/ds2781_battery.c b/drivers/power/ds2781_battery.c
new file mode 100644
index 00000000000..ca0d653d0a7
--- /dev/null
+++ b/drivers/power/ds2781_battery.c
@@ -0,0 +1,874 @@
+/*
+ * 1-wire client/driver for the Maxim/Dallas DS2781 Stand-Alone Fuel Gauge IC
+ *
+ * Author: Renata Sayakhova <renata@oktetlabs.ru>
+ *
+ * Based on ds2780_battery drivers
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/param.h>
+#include <linux/pm.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/idr.h>
+
+#include "../w1/w1.h"
+#include "../w1/slaves/w1_ds2781.h"
+
+/* Current unit measurement in uA for a 1 milli-ohm sense resistor */
+#define DS2781_CURRENT_UNITS 1563
+/* Charge unit measurement in uAh for a 1 milli-ohm sense resistor */
+#define DS2781_CHARGE_UNITS 6250
+/* Number of bytes in user EEPROM space */
+#define DS2781_USER_EEPROM_SIZE (DS2781_EEPROM_BLOCK0_END - \
+ DS2781_EEPROM_BLOCK0_START + 1)
+/* Number of bytes in parameter EEPROM space */
+#define DS2781_PARAM_EEPROM_SIZE (DS2781_EEPROM_BLOCK1_END - \
+ DS2781_EEPROM_BLOCK1_START + 1)
+
+struct ds2781_device_info {
+ struct device *dev;
+ struct power_supply bat;
+ struct device *w1_dev;
+ struct task_struct *mutex_holder;
+};
+
+enum current_types {
+ CURRENT_NOW,
+ CURRENT_AVG,
+};
+
+static const char model[] = "DS2781";
+static const char manufacturer[] = "Maxim/Dallas";
+
+static inline struct ds2781_device_info *
+to_ds2781_device_info(struct power_supply *psy)
+{
+ return container_of(psy, struct ds2781_device_info, bat);
+}
+
+static inline struct power_supply *to_power_supply(struct device *dev)
+{
+ return dev_get_drvdata(dev);
+}
+
+static inline int ds2781_battery_io(struct ds2781_device_info *dev_info,
+ char *buf, int addr, size_t count, int io)
+{
+ if (dev_info->mutex_holder == current)
+ return w1_ds2781_io_nolock(dev_info->w1_dev, buf, addr,
+ count, io);
+ else
+ return w1_ds2781_io(dev_info->w1_dev, buf, addr, count, io);
+}
+
+int w1_ds2781_read(struct ds2781_device_info *dev_info, char *buf,
+ int addr, size_t count)
+{
+ return ds2781_battery_io(dev_info, buf, addr, count, 0);
+}
+
+static inline int ds2781_read8(struct ds2781_device_info *dev_info, u8 *val,
+ int addr)
+{
+ return ds2781_battery_io(dev_info, val, addr, sizeof(u8), 0);
+}
+
+static int ds2781_read16(struct ds2781_device_info *dev_info, s16 *val,
+ int addr)
+{
+ int ret;
+ u8 raw[2];
+
+ ret = ds2781_battery_io(dev_info, raw, addr, sizeof(raw), 0);
+ if (ret < 0)
+ return ret;
+
+ *val = (raw[0] << 8) | raw[1];
+
+ return 0;
+}
+
+static inline int ds2781_read_block(struct ds2781_device_info *dev_info,
+ u8 *val, int addr, size_t count)
+{
+ return ds2781_battery_io(dev_info, val, addr, count, 0);
+}
+
+static inline int ds2781_write(struct ds2781_device_info *dev_info, u8 *val,
+ int addr, size_t count)
+{
+ return ds2781_battery_io(dev_info, val, addr, count, 1);
+}
+
+static inline int ds2781_store_eeprom(struct device *dev, int addr)
+{
+ return w1_ds2781_eeprom_cmd(dev, addr, W1_DS2781_COPY_DATA);
+}
+
+static inline int ds2781_recall_eeprom(struct device *dev, int addr)
+{
+ return w1_ds2781_eeprom_cmd(dev, addr, W1_DS2781_RECALL_DATA);
+}
+
+static int ds2781_save_eeprom(struct ds2781_device_info *dev_info, int reg)
+{
+ int ret;
+
+ ret = ds2781_store_eeprom(dev_info->w1_dev, reg);
+ if (ret < 0)
+ return ret;
+
+ ret = ds2781_recall_eeprom(dev_info->w1_dev, reg);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+/* Set sense resistor value in mhos */
+static int ds2781_set_sense_register(struct ds2781_device_info *dev_info,
+ u8 conductance)
+{
+ int ret;
+
+ ret = ds2781_write(dev_info, &conductance,
+ DS2781_RSNSP, sizeof(u8));
+ if (ret < 0)
+ return ret;
+
+ return ds2781_save_eeprom(dev_info, DS2781_RSNSP);
+}
+
+/* Get RSGAIN value from 0 to 1.999 in steps of 0.001 */
+static int ds2781_get_rsgain_register(struct ds2781_device_info *dev_info,
+ u16 *rsgain)
+{
+ return ds2781_read16(dev_info, rsgain, DS2781_RSGAIN_MSB);
+}
+
+/* Set RSGAIN value from 0 to 1.999 in steps of 0.001 */
+static int ds2781_set_rsgain_register(struct ds2781_device_info *dev_info,
+ u16 rsgain)
+{
+ int ret;
+ u8 raw[] = {rsgain >> 8, rsgain & 0xFF};
+
+ ret = ds2781_write(dev_info, raw,
+ DS2781_RSGAIN_MSB, sizeof(raw));
+ if (ret < 0)
+ return ret;
+
+ return ds2781_save_eeprom(dev_info, DS2781_RSGAIN_MSB);
+}
+
+static int ds2781_get_voltage(struct ds2781_device_info *dev_info,
+ int *voltage_uV)
+{
+ int ret;
+ char val[2];
+ int voltage_raw;
+
+ ret = w1_ds2781_read(dev_info, val, DS2781_VOLT_MSB, 2 * sizeof(u8));
+ if (ret < 0)
+ return ret;
+ /*
+ * The voltage value is located in 10 bits across the voltage MSB
+ * and LSB registers in two's compliment form
+ * Sign bit of the voltage value is in bit 7 of the voltage MSB register
+ * Bits 9 - 3 of the voltage value are in bits 6 - 0 of the
+ * voltage MSB register
+ * Bits 2 - 0 of the voltage value are in bits 7 - 5 of the
+ * voltage LSB register
+ */
+ voltage_raw = (val[0] << 3) |
+ (val[1] >> 5);
+
+ /* DS2781 reports voltage in units of 9.76mV, but the battery class
+ * reports in units of uV, so convert by multiplying by 9760. */
+ *voltage_uV = voltage_raw * 9760;
+
+ return 0;
+}
+
+static int ds2781_get_temperature(struct ds2781_device_info *dev_info,
+ int *temp)
+{
+ int ret;
+ char val[2];
+ int temp_raw;
+
+ ret = w1_ds2781_read(dev_info, val, DS2781_TEMP_MSB, 2 * sizeof(u8));
+ if (ret < 0)
+ return ret;
+ /*
+ * The temperature value is located in 10 bits across the temperature
+ * MSB and LSB registers in two's compliment form
+ * Sign bit of the temperature value is in bit 7 of the temperature
+ * MSB register
+ * Bits 9 - 3 of the temperature value are in bits 6 - 0 of the
+ * temperature MSB register
+ * Bits 2 - 0 of the temperature value are in bits 7 - 5 of the
+ * temperature LSB register
+ */
+ temp_raw = ((val[0]) << 3) |
+ (val[1] >> 5);
+ *temp = temp_raw + (temp_raw / 4);
+
+ return 0;
+}
+
+static int ds2781_get_current(struct ds2781_device_info *dev_info,
+ enum current_types type, int *current_uA)
+{
+ int ret, sense_res;
+ s16 current_raw;
+ u8 sense_res_raw, reg_msb;
+
+ /*
+ * The units of measurement for current are dependent on the value of
+ * the sense resistor.
+ */
+ ret = ds2781_read8(dev_info, &sense_res_raw, DS2781_RSNSP);
+ if (ret < 0)
+ return ret;
+
+ if (sense_res_raw == 0) {
+ dev_err(dev_info->dev, "sense resistor value is 0\n");
+ return -EINVAL;
+ }
+ sense_res = 1000 / sense_res_raw;
+
+ if (type == CURRENT_NOW)
+ reg_msb = DS2781_CURRENT_MSB;
+ else if (type == CURRENT_AVG)
+ reg_msb = DS2781_IAVG_MSB;
+ else
+ return -EINVAL;
+
+ /*
+ * The current value is located in 16 bits across the current MSB
+ * and LSB registers in two's compliment form
+ * Sign bit of the current value is in bit 7 of the current MSB register
+ * Bits 14 - 8 of the current value are in bits 6 - 0 of the current
+ * MSB register
+ * Bits 7 - 0 of the current value are in bits 7 - 0 of the current
+ * LSB register
+ */
+ ret = ds2781_read16(dev_info, &current_raw, reg_msb);
+ if (ret < 0)
+ return ret;
+
+ *current_uA = current_raw * (DS2781_CURRENT_UNITS / sense_res);
+ return 0;
+}
+
+static int ds2781_get_accumulated_current(struct ds2781_device_info *dev_info,
+ int *accumulated_current)
+{
+ int ret, sense_res;
+ s16 current_raw;
+ u8 sense_res_raw;
+
+ /*
+ * The units of measurement for accumulated current are dependent on
+ * the value of the sense resistor.
+ */
+ ret = ds2781_read8(dev_info, &sense_res_raw, DS2781_RSNSP);
+ if (ret < 0)
+ return ret;
+
+ if (sense_res_raw == 0) {
+ dev_err(dev_info->dev, "sense resistor value is 0\n");
+ return -EINVAL;
+ }
+ sense_res = 1000 / sense_res_raw;
+
+ /*
+ * The ACR value is located in 16 bits across the ACR MSB and
+ * LSB registers
+ * Bits 15 - 8 of the ACR value are in bits 7 - 0 of the ACR
+ * MSB register
+ * Bits 7 - 0 of the ACR value are in bits 7 - 0 of the ACR
+ * LSB register
+ */
+ ret = ds2781_read16(dev_info, &current_raw, DS2781_ACR_MSB);
+ if (ret < 0)
+ return ret;
+
+ *accumulated_current = current_raw * (DS2781_CHARGE_UNITS / sense_res);
+ return 0;
+}
+
+static int ds2781_get_capacity(struct ds2781_device_info *dev_info,
+ int *capacity)
+{
+ int ret;
+ u8 raw;
+
+ ret = ds2781_read8(dev_info, &raw, DS2781_RARC);
+ if (ret < 0)
+ return ret;
+
+ *capacity = raw;
+ return 0;
+}
+
+static int ds2781_get_status(struct ds2781_device_info *dev_info, int *status)
+{
+ int ret, current_uA, capacity;
+
+ ret = ds2781_get_current(dev_info, CURRENT_NOW, &current_uA);
+ if (ret < 0)
+ return ret;
+
+ ret = ds2781_get_capacity(dev_info, &capacity);
+ if (ret < 0)
+ return ret;
+
+ if (power_supply_am_i_supplied(&dev_info->bat)) {
+ if (capacity == 100)
+ *status = POWER_SUPPLY_STATUS_FULL;
+ else if (current_uA > 50000)
+ *status = POWER_SUPPLY_STATUS_CHARGING;
+ else
+ *status = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ } else {
+ *status = POWER_SUPPLY_STATUS_DISCHARGING;
+ }
+ return 0;
+}
+
+static int ds2781_get_charge_now(struct ds2781_device_info *dev_info,
+ int *charge_now)
+{
+ int ret;
+ u16 charge_raw;
+
+ /*
+ * The RAAC value is located in 16 bits across the RAAC MSB and
+ * LSB registers
+ * Bits 15 - 8 of the RAAC value are in bits 7 - 0 of the RAAC
+ * MSB register
+ * Bits 7 - 0 of the RAAC value are in bits 7 - 0 of the RAAC
+ * LSB register
+ */
+ ret = ds2781_read16(dev_info, &charge_raw, DS2781_RAAC_MSB);
+ if (ret < 0)
+ return ret;
+
+ *charge_now = charge_raw * 1600;
+ return 0;
+}
+
+static int ds2781_get_control_register(struct ds2781_device_info *dev_info,
+ u8 *control_reg)
+{
+ return ds2781_read8(dev_info, control_reg, DS2781_CONTROL);
+}
+
+static int ds2781_set_control_register(struct ds2781_device_info *dev_info,
+ u8 control_reg)
+{
+ int ret;
+
+ ret = ds2781_write(dev_info, &control_reg,
+ DS2781_CONTROL, sizeof(u8));
+ if (ret < 0)
+ return ret;
+
+ return ds2781_save_eeprom(dev_info, DS2781_CONTROL);
+}
+
+static int ds2781_battery_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ int ret = 0;
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = ds2781_get_voltage(dev_info, &val->intval);
+ break;
+
+ case POWER_SUPPLY_PROP_TEMP:
+ ret = ds2781_get_temperature(dev_info, &val->intval);
+ break;
+
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = model;
+ break;
+
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = manufacturer;
+ break;
+
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ ret = ds2781_get_current(dev_info, CURRENT_NOW, &val->intval);
+ break;
+
+ case POWER_SUPPLY_PROP_CURRENT_AVG:
+ ret = ds2781_get_current(dev_info, CURRENT_AVG, &val->intval);
+ break;
+
+ case POWER_SUPPLY_PROP_STATUS:
+ ret = ds2781_get_status(dev_info, &val->intval);
+ break;
+
+ case POWER_SUPPLY_PROP_CAPACITY:
+ ret = ds2781_get_capacity(dev_info, &val->intval);
+ break;
+
+ case POWER_SUPPLY_PROP_CHARGE_COUNTER:
+ ret = ds2781_get_accumulated_current(dev_info, &val->intval);
+ break;
+
+ case POWER_SUPPLY_PROP_CHARGE_NOW:
+ ret = ds2781_get_charge_now(dev_info, &val->intval);
+ break;
+
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static enum power_supply_property ds2781_battery_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CURRENT_AVG,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CHARGE_COUNTER,
+ POWER_SUPPLY_PROP_CHARGE_NOW,
+};
+
+static ssize_t ds2781_get_pmod_enabled(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u8 control_reg;
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+
+ /* Get power mode */
+ ret = ds2781_get_control_register(dev_info, &control_reg);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n",
+ !!(control_reg & DS2781_CONTROL_PMOD));
+}
+
+static ssize_t ds2781_set_pmod_enabled(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ int ret;
+ u8 control_reg, new_setting;
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+
+ /* Set power mode */
+ ret = ds2781_get_control_register(dev_info, &control_reg);
+ if (ret < 0)
+ return ret;
+
+ ret = kstrtou8(buf, 0, &new_setting);
+ if (ret < 0)
+ return ret;
+
+ if ((new_setting != 0) && (new_setting != 1)) {
+ dev_err(dev_info->dev, "Invalid pmod setting (0 or 1)\n");
+ return -EINVAL;
+ }
+
+ if (new_setting)
+ control_reg |= DS2781_CONTROL_PMOD;
+ else
+ control_reg &= ~DS2781_CONTROL_PMOD;
+
+ ret = ds2781_set_control_register(dev_info, control_reg);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static ssize_t ds2781_get_sense_resistor_value(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u8 sense_resistor;
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+
+ ret = ds2781_read8(dev_info, &sense_resistor, DS2781_RSNSP);
+ if (ret < 0)
+ return ret;
+
+ ret = sprintf(buf, "%d\n", sense_resistor);
+ return ret;
+}
+
+static ssize_t ds2781_set_sense_resistor_value(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ int ret;
+ u8 new_setting;
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+
+ ret = kstrtou8(buf, 0, &new_setting);
+ if (ret < 0)
+ return ret;
+
+ ret = ds2781_set_sense_register(dev_info, new_setting);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static ssize_t ds2781_get_rsgain_setting(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u16 rsgain;
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+
+ ret = ds2781_get_rsgain_register(dev_info, &rsgain);
+ if (ret < 0)
+ return ret;
+
+ return sprintf(buf, "%d\n", rsgain);
+}
+
+static ssize_t ds2781_set_rsgain_setting(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ int ret;
+ u16 new_setting;
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+
+ ret = kstrtou16(buf, 0, &new_setting);
+ if (ret < 0)
+ return ret;
+
+ /* Gain can only be from 0 to 1.999 in steps of .001 */
+ if (new_setting > 1999) {
+ dev_err(dev_info->dev, "Invalid rsgain setting (0 - 1999)\n");
+ return -EINVAL;
+ }
+
+ ret = ds2781_set_rsgain_register(dev_info, new_setting);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static ssize_t ds2781_get_pio_pin(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ int ret;
+ u8 sfr;
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+
+ ret = ds2781_read8(dev_info, &sfr, DS2781_SFR);
+ if (ret < 0)
+ return ret;
+
+ ret = sprintf(buf, "%d\n", sfr & DS2781_SFR_PIOSC);
+ return ret;
+}
+
+static ssize_t ds2781_set_pio_pin(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ int ret;
+ u8 new_setting;
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+
+ ret = kstrtou8(buf, 0, &new_setting);
+ if (ret < 0)
+ return ret;
+
+ if ((new_setting != 0) && (new_setting != 1)) {
+ dev_err(dev_info->dev, "Invalid pio_pin setting (0 or 1)\n");
+ return -EINVAL;
+ }
+
+ ret = ds2781_write(dev_info, &new_setting,
+ DS2781_SFR, sizeof(u8));
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static ssize_t ds2781_read_param_eeprom_bin(struct file *filp,
+ struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+
+ count = min_t(loff_t, count,
+ DS2781_EEPROM_BLOCK1_END -
+ DS2781_EEPROM_BLOCK1_START + 1 - off);
+
+ return ds2781_read_block(dev_info, buf,
+ DS2781_EEPROM_BLOCK1_START + off, count);
+}
+
+static ssize_t ds2781_write_param_eeprom_bin(struct file *filp,
+ struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+ int ret;
+
+ count = min_t(loff_t, count,
+ DS2781_EEPROM_BLOCK1_END -
+ DS2781_EEPROM_BLOCK1_START + 1 - off);
+
+ ret = ds2781_write(dev_info, buf,
+ DS2781_EEPROM_BLOCK1_START + off, count);
+ if (ret < 0)
+ return ret;
+
+ ret = ds2781_save_eeprom(dev_info, DS2781_EEPROM_BLOCK1_START);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static struct bin_attribute ds2781_param_eeprom_bin_attr = {
+ .attr = {
+ .name = "param_eeprom",
+ .mode = S_IRUGO | S_IWUSR,
+ },
+ .size = DS2781_EEPROM_BLOCK1_END - DS2781_EEPROM_BLOCK1_START + 1,
+ .read = ds2781_read_param_eeprom_bin,
+ .write = ds2781_write_param_eeprom_bin,
+};
+
+static ssize_t ds2781_read_user_eeprom_bin(struct file *filp,
+ struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+
+ count = min_t(loff_t, count,
+ DS2781_EEPROM_BLOCK0_END -
+ DS2781_EEPROM_BLOCK0_START + 1 - off);
+
+ return ds2781_read_block(dev_info, buf,
+ DS2781_EEPROM_BLOCK0_START + off, count);
+
+}
+
+static ssize_t ds2781_write_user_eeprom_bin(struct file *filp,
+ struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ struct power_supply *psy = to_power_supply(dev);
+ struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
+ int ret;
+
+ count = min_t(loff_t, count,
+ DS2781_EEPROM_BLOCK0_END -
+ DS2781_EEPROM_BLOCK0_START + 1 - off);
+
+ ret = ds2781_write(dev_info, buf,
+ DS2781_EEPROM_BLOCK0_START + off, count);
+ if (ret < 0)
+ return ret;
+
+ ret = ds2781_save_eeprom(dev_info, DS2781_EEPROM_BLOCK0_START);
+ if (ret < 0)
+ return ret;
+
+ return count;
+}
+
+static struct bin_attribute ds2781_user_eeprom_bin_attr = {
+ .attr = {
+ .name = "user_eeprom",
+ .mode = S_IRUGO | S_IWUSR,
+ },
+ .size = DS2781_EEPROM_BLOCK0_END - DS2781_EEPROM_BLOCK0_START + 1,
+ .read = ds2781_read_user_eeprom_bin,
+ .write = ds2781_write_user_eeprom_bin,
+};
+
+static DEVICE_ATTR(pmod_enabled, S_IRUGO | S_IWUSR, ds2781_get_pmod_enabled,
+ ds2781_set_pmod_enabled);
+static DEVICE_ATTR(sense_resistor_value, S_IRUGO | S_IWUSR,
+ ds2781_get_sense_resistor_value, ds2781_set_sense_resistor_value);
+static DEVICE_ATTR(rsgain_setting, S_IRUGO | S_IWUSR, ds2781_get_rsgain_setting,
+ ds2781_set_rsgain_setting);
+static DEVICE_ATTR(pio_pin, S_IRUGO | S_IWUSR, ds2781_get_pio_pin,
+ ds2781_set_pio_pin);
+
+
+static struct attribute *ds2781_attributes[] = {
+ &dev_attr_pmod_enabled.attr,
+ &dev_attr_sense_resistor_value.attr,
+ &dev_attr_rsgain_setting.attr,
+ &dev_attr_pio_pin.attr,
+ NULL
+};
+
+static const struct attribute_group ds2781_attr_group = {
+ .attrs = ds2781_attributes,
+};
+
+static int __devinit ds2781_battery_probe(struct platform_device *pdev)
+{
+ int ret = 0;
+ struct ds2781_device_info *dev_info;
+
+ dev_info = kzalloc(sizeof(*dev_info), GFP_KERNEL);
+ if (!dev_info) {
+ ret = -ENOMEM;
+ goto fail;
+ }
+
+ platform_set_drvdata(pdev, dev_info);
+
+ dev_info->dev = &pdev->dev;
+ dev_info->w1_dev = pdev->dev.parent;
+ dev_info->bat.name = dev_name(&pdev->dev);
+ dev_info->bat.type = POWER_SUPPLY_TYPE_BATTERY;
+ dev_info->bat.properties = ds2781_battery_props;
+ dev_info->bat.num_properties = ARRAY_SIZE(ds2781_battery_props);
+ dev_info->bat.get_property = ds2781_battery_get_property;
+ dev_info->mutex_holder = current;
+
+ ret = power_supply_register(&pdev->dev, &dev_info->bat);
+ if (ret) {
+ dev_err(dev_info->dev, "failed to register battery\n");
+ goto fail_free_info;
+ }
+
+ ret = sysfs_create_group(&dev_info->bat.dev->kobj, &ds2781_attr_group);
+ if (ret) {
+ dev_err(dev_info->dev, "failed to create sysfs group\n");
+ goto fail_unregister;
+ }
+
+ ret = sysfs_create_bin_file(&dev_info->bat.dev->kobj,
+ &ds2781_param_eeprom_bin_attr);
+ if (ret) {
+ dev_err(dev_info->dev,
+ "failed to create param eeprom bin file");
+ goto fail_remove_group;
+ }
+
+ ret = sysfs_create_bin_file(&dev_info->bat.dev->kobj,
+ &ds2781_user_eeprom_bin_attr);
+ if (ret) {
+ dev_err(dev_info->dev,
+ "failed to create user eeprom bin file");
+ goto fail_remove_bin_file;
+ }
+
+ dev_info->mutex_holder = NULL;
+
+ return 0;
+
+fail_remove_bin_file:
+ sysfs_remove_bin_file(&dev_info->bat.dev->kobj,
+ &ds2781_param_eeprom_bin_attr);
+fail_remove_group:
+ sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2781_attr_group);
+fail_unregister:
+ power_supply_unregister(&dev_info->bat);
+fail_free_info:
+ kfree(dev_info);
+fail:
+ return ret;
+}
+
+static int __devexit ds2781_battery_remove(struct platform_device *pdev)
+{
+ struct ds2781_device_info *dev_info = platform_get_drvdata(pdev);
+
+ dev_info->mutex_holder = current;
+
+ /* remove attributes */
+ sysfs_remove_group(&dev_info->bat.dev->kobj, &ds2781_attr_group);
+
+ power_supply_unregister(&dev_info->bat);
+
+ kfree(dev_info);
+ return 0;
+}
+
+static struct platform_driver ds2781_battery_driver = {
+ .driver = {
+ .name = "ds2781-battery",
+ },
+ .probe = ds2781_battery_probe,
+ .remove = __devexit_p(ds2781_battery_remove),
+};
+
+static int __init ds2781_battery_init(void)
+{
+ return platform_driver_register(&ds2781_battery_driver);
+}
+
+static void __exit ds2781_battery_exit(void)
+{
+ platform_driver_unregister(&ds2781_battery_driver);
+}
+
+module_init(ds2781_battery_init);
+module_exit(ds2781_battery_exit);
+
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Renata Sayakhova <renata@oktetlabs.ru>");
+MODULE_DESCRIPTION("Maxim/Dallas DS2781 Stand-Alone Fuel Gauage IC driver");
+MODULE_ALIAS("platform:ds2781-battery");
+
diff --git a/drivers/regulator/core.c b/drivers/regulator/core.c
index e9a83f84ada..fcde037b346 100644
--- a/drivers/regulator/core.c
+++ b/drivers/regulator/core.c
@@ -1210,7 +1210,7 @@ static struct regulator *_regulator_get(struct device *dev, const char *id,
{
struct regulator_dev *rdev;
struct regulator_map *map;
- struct regulator *regulator = ERR_PTR(-ENODEV);
+ struct regulator *regulator = ERR_PTR(-EPROBE_DEFER);
const char *devname = NULL;
int ret;
@@ -2834,7 +2834,7 @@ struct regulator_dev *regulator_register(struct regulator_desc *regulator_desc,
if (!r) {
dev_err(dev, "Failed to find supply %s\n", supply);
- ret = -ENODEV;
+ ret = -EPROBE_DEFER;
goto scrub;
}
diff --git a/drivers/s390/cio/ccwgroup.c b/drivers/s390/cio/ccwgroup.c
index 4f1989d27b1..5f1dc6fb570 100644
--- a/drivers/s390/cio/ccwgroup.c
+++ b/drivers/s390/cio/ccwgroup.c
@@ -580,7 +580,6 @@ void ccwgroup_driver_unregister(struct ccwgroup_driver *cdriver)
struct device *dev;
/* We don't want ccwgroup devices to live longer than their driver. */
- get_driver(&cdriver->driver);
while ((dev = driver_find_device(&cdriver->driver, NULL, NULL,
__ccwgroup_match_all))) {
struct ccwgroup_device *gdev = to_ccwgroupdev(dev);
@@ -592,7 +591,6 @@ void ccwgroup_driver_unregister(struct ccwgroup_driver *cdriver)
mutex_unlock(&gdev->reg_mutex);
put_device(dev);
}
- put_driver(&cdriver->driver);
driver_unregister(&cdriver->driver);
}
EXPORT_SYMBOL(ccwgroup_driver_unregister);
diff --git a/drivers/s390/cio/device.c b/drivers/s390/cio/device.c
index 47269858ecb..02d01525946 100644
--- a/drivers/s390/cio/device.c
+++ b/drivers/s390/cio/device.c
@@ -1676,15 +1676,9 @@ struct ccw_device *get_ccwdev_by_busid(struct ccw_driver *cdrv,
const char *bus_id)
{
struct device *dev;
- struct device_driver *drv;
- drv = get_driver(&cdrv->driver);
- if (!drv)
- return NULL;
-
- dev = driver_find_device(drv, NULL, (void *)bus_id,
+ dev = driver_find_device(&cdrv->driver, NULL, (void *)bus_id,
__ccwdev_check_busid);
- put_driver(drv);
return dev ? to_ccwdev(dev) : NULL;
}
diff --git a/drivers/s390/net/smsgiucv_app.c b/drivers/s390/net/smsgiucv_app.c
index 4d2ea400042..32515a201bb 100644
--- a/drivers/s390/net/smsgiucv_app.c
+++ b/drivers/s390/net/smsgiucv_app.c
@@ -168,7 +168,7 @@ static int __init smsgiucv_app_init(void)
rc = dev_set_name(smsg_app_dev, KMSG_COMPONENT);
if (rc) {
kfree(smsg_app_dev);
- goto fail_put_driver;
+ goto fail;
}
smsg_app_dev->bus = &iucv_bus;
smsg_app_dev->parent = iucv_root;
@@ -177,7 +177,7 @@ static int __init smsgiucv_app_init(void)
rc = device_register(smsg_app_dev);
if (rc) {
put_device(smsg_app_dev);
- goto fail_put_driver;
+ goto fail;
}
/* convert sender to uppercase characters */
@@ -191,12 +191,11 @@ static int __init smsgiucv_app_init(void)
rc = smsg_register_callback(SMSG_PREFIX, smsg_app_callback);
if (rc) {
device_unregister(smsg_app_dev);
- goto fail_put_driver;
+ goto fail;
}
rc = 0;
-fail_put_driver:
- put_driver(smsgiucv_drv);
+fail:
return rc;
}
module_init(smsgiucv_app_init);
diff --git a/drivers/ssb/main.c b/drivers/ssb/main.c
index bb6317fb925..ff109ae9476 100644
--- a/drivers/ssb/main.c
+++ b/drivers/ssb/main.c
@@ -140,19 +140,6 @@ static void ssb_device_put(struct ssb_device *dev)
put_device(dev->dev);
}
-static inline struct ssb_driver *ssb_driver_get(struct ssb_driver *drv)
-{
- if (drv)
- get_driver(&drv->drv);
- return drv;
-}
-
-static inline void ssb_driver_put(struct ssb_driver *drv)
-{
- if (drv)
- put_driver(&drv->drv);
-}
-
static int ssb_device_resume(struct device *dev)
{
struct ssb_device *ssb_dev = dev_to_ssb_dev(dev);
@@ -250,11 +237,9 @@ int ssb_devices_freeze(struct ssb_bus *bus, struct ssb_freeze_context *ctx)
ssb_device_put(sdev);
continue;
}
- sdrv = ssb_driver_get(drv_to_ssb_drv(sdev->dev->driver));
- if (!sdrv || SSB_WARN_ON(!sdrv->remove)) {
- ssb_device_put(sdev);
+ sdrv = drv_to_ssb_drv(sdev->dev->driver);
+ if (SSB_WARN_ON(!sdrv->remove))
continue;
- }
sdrv->remove(sdev);
ctx->device_frozen[i] = 1;
}
@@ -293,7 +278,6 @@ int ssb_devices_thaw(struct ssb_freeze_context *ctx)
dev_name(sdev->dev));
result = err;
}
- ssb_driver_put(sdrv);
ssb_device_put(sdev);
}
diff --git a/drivers/usb/core/driver.c b/drivers/usb/core/driver.c
index d40ff956881..4fee024ecc9 100644
--- a/drivers/usb/core/driver.c
+++ b/drivers/usb/core/driver.c
@@ -71,10 +71,7 @@ ssize_t usb_store_new_id(struct usb_dynids *dynids,
list_add_tail(&dynid->node, &dynids->list);
spin_unlock(&dynids->lock);
- if (get_driver(driver)) {
- retval = driver_attach(driver);
- put_driver(driver);
- }
+ retval = driver_attach(driver);
if (retval)
return retval;
@@ -132,43 +129,39 @@ store_remove_id(struct device_driver *driver, const char *buf, size_t count)
}
static DRIVER_ATTR(remove_id, S_IWUSR, NULL, store_remove_id);
-static int usb_create_newid_file(struct usb_driver *usb_drv)
+static int usb_create_newid_files(struct usb_driver *usb_drv)
{
int error = 0;
if (usb_drv->no_dynamic_id)
goto exit;
- if (usb_drv->probe != NULL)
+ if (usb_drv->probe != NULL) {
error = driver_create_file(&usb_drv->drvwrap.driver,
&driver_attr_new_id);
+ if (error == 0) {
+ error = driver_create_file(&usb_drv->drvwrap.driver,
+ &driver_attr_remove_id);
+ if (error)
+ driver_remove_file(&usb_drv->drvwrap.driver,
+ &driver_attr_new_id);
+ }
+ }
exit:
return error;
}
-static void usb_remove_newid_file(struct usb_driver *usb_drv)
+static void usb_remove_newid_files(struct usb_driver *usb_drv)
{
if (usb_drv->no_dynamic_id)
return;
- if (usb_drv->probe != NULL)
+ if (usb_drv->probe != NULL) {
driver_remove_file(&usb_drv->drvwrap.driver,
- &driver_attr_new_id);
-}
-
-static int
-usb_create_removeid_file(struct usb_driver *drv)
-{
- int error = 0;
- if (drv->probe != NULL)
- error = driver_create_file(&drv->drvwrap.driver,
&driver_attr_remove_id);
- return error;
-}
-
-static void usb_remove_removeid_file(struct usb_driver *drv)
-{
- driver_remove_file(&drv->drvwrap.driver, &driver_attr_remove_id);
+ driver_remove_file(&usb_drv->drvwrap.driver,
+ &driver_attr_new_id);
+ }
}
static void usb_free_dynids(struct usb_driver *usb_drv)
@@ -183,22 +176,12 @@ static void usb_free_dynids(struct usb_driver *usb_drv)
spin_unlock(&usb_drv->dynids.lock);
}
#else
-static inline int usb_create_newid_file(struct usb_driver *usb_drv)
+static inline int usb_create_newid_files(struct usb_driver *usb_drv)
{
return 0;
}
-static void usb_remove_newid_file(struct usb_driver *usb_drv)
-{
-}
-
-static int
-usb_create_removeid_file(struct usb_driver *drv)
-{
- return 0;
-}
-
-static void usb_remove_removeid_file(struct usb_driver *drv)
+static void usb_remove_newid_files(struct usb_driver *usb_drv)
{
}
@@ -875,22 +858,16 @@ int usb_register_driver(struct usb_driver *new_driver, struct module *owner,
usbfs_update_special();
- retval = usb_create_newid_file(new_driver);
+ retval = usb_create_newid_files(new_driver);
if (retval)
goto out_newid;
- retval = usb_create_removeid_file(new_driver);
- if (retval)
- goto out_removeid;
-
pr_info("%s: registered new interface driver %s\n",
usbcore_name, new_driver->name);
out:
return retval;
-out_removeid:
- usb_remove_newid_file(new_driver);
out_newid:
driver_unregister(&new_driver->drvwrap.driver);
@@ -917,10 +894,9 @@ void usb_deregister(struct usb_driver *driver)
pr_info("%s: deregistering interface driver %s\n",
usbcore_name, driver->name);
- usb_remove_removeid_file(driver);
- usb_remove_newid_file(driver);
- usb_free_dynids(driver);
+ usb_remove_newid_files(driver);
driver_unregister(&driver->drvwrap.driver);
+ usb_free_dynids(driver);
usbfs_update_special();
}
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index 64e1f7c67b0..c68e4270457 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -171,14 +171,4 @@ MODULE_AUTHOR("Felipe Balbi <balbi@ti.com>");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("DesignWare USB3 PCI Glue Layer");
-static int __devinit dwc3_pci_init(void)
-{
- return pci_register_driver(&dwc3_pci_driver);
-}
-module_init(dwc3_pci_init);
-
-static void __exit dwc3_pci_exit(void)
-{
- pci_unregister_driver(&dwc3_pci_driver);
-}
-module_exit(dwc3_pci_exit);
+module_pci_driver(dwc3_pci_driver);
diff --git a/drivers/w1/masters/w1-gpio.c b/drivers/w1/masters/w1-gpio.c
index fcbe742188a..df600d14974 100644
--- a/drivers/w1/masters/w1-gpio.c
+++ b/drivers/w1/masters/w1-gpio.c
@@ -13,12 +13,11 @@
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/w1-gpio.h>
+#include <linux/gpio.h>
#include "../w1.h"
#include "../w1_int.h"
-#include <asm/gpio.h>
-
static void w1_gpio_write_bit_dir(void *data, u8 bit)
{
struct w1_gpio_platform_data *pdata = data;
diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig
index d0cb01b4201..eb9e376d624 100644
--- a/drivers/w1/slaves/Kconfig
+++ b/drivers/w1/slaves/Kconfig
@@ -81,6 +81,19 @@ config W1_SLAVE_DS2780
If you are unsure, say N.
+config W1_SLAVE_DS2781
+ tristate "Dallas 2781 battery monitor chip"
+ depends on W1
+ help
+ If you enable this you will have the DS2781 battery monitor
+ chip support.
+
+ The battery monitor chip is used in many batteries/devices
+ as the one who is responsible for charging/discharging/monitoring
+ Li+ batteries.
+
+ If you are unsure, say N.
+
config W1_SLAVE_BQ27000
tristate "BQ27000 slave support"
depends on W1
diff --git a/drivers/w1/slaves/Makefile b/drivers/w1/slaves/Makefile
index 1f31e9fb0b2..c4f1859fb52 100644
--- a/drivers/w1/slaves/Makefile
+++ b/drivers/w1/slaves/Makefile
@@ -10,4 +10,5 @@ obj-$(CONFIG_W1_SLAVE_DS2431) += w1_ds2431.o
obj-$(CONFIG_W1_SLAVE_DS2433) += w1_ds2433.o
obj-$(CONFIG_W1_SLAVE_DS2760) += w1_ds2760.o
obj-$(CONFIG_W1_SLAVE_DS2780) += w1_ds2780.o
+obj-$(CONFIG_W1_SLAVE_DS2781) += w1_ds2781.o
obj-$(CONFIG_W1_SLAVE_BQ27000) += w1_bq27000.o
diff --git a/drivers/w1/slaves/w1_bq27000.c b/drivers/w1/slaves/w1_bq27000.c
index 8f4c91f6c68..52ad812fa1e 100644
--- a/drivers/w1/slaves/w1_bq27000.c
+++ b/drivers/w1/slaves/w1_bq27000.c
@@ -15,6 +15,7 @@
#include <linux/types.h>
#include <linux/platform_device.h>
#include <linux/mutex.h>
+#include <linux/power/bq27x00_battery.h>
#include "../w1.h"
#include "../w1_int.h"
@@ -25,46 +26,37 @@
static int F_ID;
-void w1_bq27000_write(struct device *dev, u8 buf, u8 reg)
-{
- struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
-
- if (!dev) {
- pr_info("Could not obtain slave dev ptr\n");
- return;
- }
-
- w1_write_8(sl->master, HDQ_CMD_WRITE | reg);
- w1_write_8(sl->master, buf);
-}
-EXPORT_SYMBOL(w1_bq27000_write);
-
-int w1_bq27000_read(struct device *dev, u8 reg)
+static int w1_bq27000_read(struct device *dev, unsigned int reg)
{
u8 val;
- struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
-
- if (!dev)
- return 0;
+ struct w1_slave *sl = container_of(dev->parent, struct w1_slave, dev);
+ mutex_lock(&sl->master->mutex);
w1_write_8(sl->master, HDQ_CMD_READ | reg);
val = w1_read_8(sl->master);
+ mutex_unlock(&sl->master->mutex);
return val;
}
-EXPORT_SYMBOL(w1_bq27000_read);
+
+static struct bq27000_platform_data bq27000_battery_info = {
+ .read = w1_bq27000_read,
+ .name = "bq27000-battery",
+};
static int w1_bq27000_add_slave(struct w1_slave *sl)
{
int ret;
- int id = 1;
struct platform_device *pdev;
- pdev = platform_device_alloc("bq27000-battery", id);
+ pdev = platform_device_alloc("bq27000-battery", -1);
if (!pdev) {
ret = -ENOMEM;
return ret;
}
+ ret = platform_device_add_data(pdev,
+ &bq27000_battery_info,
+ sizeof(bq27000_battery_info));
pdev->dev.parent = &sl->dev;
ret = platform_device_add(pdev);
diff --git a/drivers/w1/slaves/w1_ds2781.c b/drivers/w1/slaves/w1_ds2781.c
new file mode 100644
index 00000000000..0d0c7985293
--- /dev/null
+++ b/drivers/w1/slaves/w1_ds2781.c
@@ -0,0 +1,201 @@
+/*
+ * 1-Wire implementation for the ds2781 chip
+ *
+ * Author: Renata Sayakhova <renata@oktetlabs.ru>
+ *
+ * Based on w1-ds2780 driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/mutex.h>
+#include <linux/idr.h>
+
+#include "../w1.h"
+#include "../w1_int.h"
+#include "../w1_family.h"
+#include "w1_ds2781.h"
+
+static int w1_ds2781_do_io(struct device *dev, char *buf, int addr,
+ size_t count, int io)
+{
+ struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
+
+ if (addr > DS2781_DATA_SIZE || addr < 0)
+ return 0;
+
+ count = min_t(int, count, DS2781_DATA_SIZE - addr);
+
+ if (w1_reset_select_slave(sl) == 0) {
+ if (io) {
+ w1_write_8(sl->master, W1_DS2781_WRITE_DATA);
+ w1_write_8(sl->master, addr);
+ w1_write_block(sl->master, buf, count);
+ } else {
+ w1_write_8(sl->master, W1_DS2781_READ_DATA);
+ w1_write_8(sl->master, addr);
+ count = w1_read_block(sl->master, buf, count);
+ }
+ }
+
+ return count;
+}
+
+int w1_ds2781_io(struct device *dev, char *buf, int addr, size_t count,
+ int io)
+{
+ struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
+ int ret;
+
+ if (!dev)
+ return -ENODEV;
+
+ mutex_lock(&sl->master->mutex);
+
+ ret = w1_ds2781_do_io(dev, buf, addr, count, io);
+
+ mutex_unlock(&sl->master->mutex);
+
+ return ret;
+}
+EXPORT_SYMBOL(w1_ds2781_io);
+
+int w1_ds2781_io_nolock(struct device *dev, char *buf, int addr, size_t count,
+ int io)
+{
+ int ret;
+
+ if (!dev)
+ return -ENODEV;
+
+ ret = w1_ds2781_do_io(dev, buf, addr, count, io);
+
+ return ret;
+}
+EXPORT_SYMBOL(w1_ds2781_io_nolock);
+
+int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd)
+{
+ struct w1_slave *sl = container_of(dev, struct w1_slave, dev);
+
+ if (!dev)
+ return -EINVAL;
+
+ mutex_lock(&sl->master->mutex);
+
+ if (w1_reset_select_slave(sl) == 0) {
+ w1_write_8(sl->master, cmd);
+ w1_write_8(sl->master, addr);
+ }
+
+ mutex_unlock(&sl->master->mutex);
+ return 0;
+}
+EXPORT_SYMBOL(w1_ds2781_eeprom_cmd);
+
+static ssize_t w1_ds2781_read_bin(struct file *filp,
+ struct kobject *kobj,
+ struct bin_attribute *bin_attr,
+ char *buf, loff_t off, size_t count)
+{
+ struct device *dev = container_of(kobj, struct device, kobj);
+ return w1_ds2781_io(dev, buf, off, count, 0);
+}
+
+static struct bin_attribute w1_ds2781_bin_attr = {
+ .attr = {
+ .name = "w1_slave",
+ .mode = S_IRUGO,
+ },
+ .size = DS2781_DATA_SIZE,
+ .read = w1_ds2781_read_bin,
+};
+
+static DEFINE_IDA(bat_ida);
+
+static int w1_ds2781_add_slave(struct w1_slave *sl)
+{
+ int ret;
+ int id;
+ struct platform_device *pdev;
+
+ id = ida_simple_get(&bat_ida, 0, 0, GFP_KERNEL);
+ if (id < 0) {
+ ret = id;
+ goto noid;
+ }
+
+ pdev = platform_device_alloc("ds2781-battery", id);
+ if (!pdev) {
+ ret = -ENOMEM;
+ goto pdev_alloc_failed;
+ }
+ pdev->dev.parent = &sl->dev;
+
+ ret = platform_device_add(pdev);
+ if (ret)
+ goto pdev_add_failed;
+
+ ret = sysfs_create_bin_file(&sl->dev.kobj, &w1_ds2781_bin_attr);
+ if (ret)
+ goto bin_attr_failed;
+
+ dev_set_drvdata(&sl->dev, pdev);
+
+ return 0;
+
+bin_attr_failed:
+pdev_add_failed:
+ platform_device_unregister(pdev);
+pdev_alloc_failed:
+ ida_simple_remove(&bat_ida, id);
+noid:
+ return ret;
+}
+
+static void w1_ds2781_remove_slave(struct w1_slave *sl)
+{
+ struct platform_device *pdev = dev_get_drvdata(&sl->dev);
+ int id = pdev->id;
+
+ platform_device_unregister(pdev);
+ ida_simple_remove(&bat_ida, id);
+ sysfs_remove_bin_file(&sl->dev.kobj, &w1_ds2781_bin_attr);
+}
+
+static struct w1_family_ops w1_ds2781_fops = {
+ .add_slave = w1_ds2781_add_slave,
+ .remove_slave = w1_ds2781_remove_slave,
+};
+
+static struct w1_family w1_ds2781_family = {
+ .fid = W1_FAMILY_DS2781,
+ .fops = &w1_ds2781_fops,
+};
+
+static int __init w1_ds2781_init(void)
+{
+ ida_init(&bat_ida);
+ return w1_register_family(&w1_ds2781_family);
+}
+
+static void __exit w1_ds2781_exit(void)
+{
+ w1_unregister_family(&w1_ds2781_family);
+ ida_destroy(&bat_ida);
+}
+
+module_init(w1_ds2781_init);
+module_exit(w1_ds2781_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Renata Sayakhova <renata@oktetlabs.ru>");
+MODULE_DESCRIPTION("1-wire Driver for Maxim/Dallas DS2781 Stand-Alone Fuel Gauge IC");
diff --git a/drivers/w1/slaves/w1_ds2781.h b/drivers/w1/slaves/w1_ds2781.h
new file mode 100644
index 00000000000..82bc66497b4
--- /dev/null
+++ b/drivers/w1/slaves/w1_ds2781.h
@@ -0,0 +1,136 @@
+/*
+ * 1-Wire implementation for the ds2780 chip
+ *
+ * Author: Renata Sayakhova <renata@oktetlabs.ru>
+ *
+ * Based on w1-ds2760 driver
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ */
+
+#ifndef _W1_DS2781_H
+#define _W1_DS2781_H
+
+/* Function commands */
+#define W1_DS2781_READ_DATA 0x69
+#define W1_DS2781_WRITE_DATA 0x6C
+#define W1_DS2781_COPY_DATA 0x48
+#define W1_DS2781_RECALL_DATA 0xB8
+#define W1_DS2781_LOCK 0x6A
+
+/* Register map */
+/* Register 0x00 Reserved */
+#define DS2781_STATUS 0x01
+#define DS2781_RAAC_MSB 0x02
+#define DS2781_RAAC_LSB 0x03
+#define DS2781_RSAC_MSB 0x04
+#define DS2781_RSAC_LSB 0x05
+#define DS2781_RARC 0x06
+#define DS2781_RSRC 0x07
+#define DS2781_IAVG_MSB 0x08
+#define DS2781_IAVG_LSB 0x09
+#define DS2781_TEMP_MSB 0x0A
+#define DS2781_TEMP_LSB 0x0B
+#define DS2781_VOLT_MSB 0x0C
+#define DS2781_VOLT_LSB 0x0D
+#define DS2781_CURRENT_MSB 0x0E
+#define DS2781_CURRENT_LSB 0x0F
+#define DS2781_ACR_MSB 0x10
+#define DS2781_ACR_LSB 0x11
+#define DS2781_ACRL_MSB 0x12
+#define DS2781_ACRL_LSB 0x13
+#define DS2781_AS 0x14
+#define DS2781_SFR 0x15
+#define DS2781_FULL_MSB 0x16
+#define DS2781_FULL_LSB 0x17
+#define DS2781_AE_MSB 0x18
+#define DS2781_AE_LSB 0x19
+#define DS2781_SE_MSB 0x1A
+#define DS2781_SE_LSB 0x1B
+/* Register 0x1C - 0x1E Reserved */
+#define DS2781_EEPROM 0x1F
+#define DS2781_EEPROM_BLOCK0_START 0x20
+/* Register 0x20 - 0x2F User EEPROM */
+#define DS2781_EEPROM_BLOCK0_END 0x2F
+/* Register 0x30 - 0x5F Reserved */
+#define DS2781_EEPROM_BLOCK1_START 0x60
+#define DS2781_CONTROL 0x60
+#define DS2781_AB 0x61
+#define DS2781_AC_MSB 0x62
+#define DS2781_AC_LSB 0x63
+#define DS2781_VCHG 0x64
+#define DS2781_IMIN 0x65
+#define DS2781_VAE 0x66
+#define DS2781_IAE 0x67
+#define DS2781_AE_40 0x68
+#define DS2781_RSNSP 0x69
+#define DS2781_FULL_40_MSB 0x6A
+#define DS2781_FULL_40_LSB 0x6B
+#define DS2781_FULL_4_SLOPE 0x6C
+#define DS2781_FULL_3_SLOPE 0x6D
+#define DS2781_FULL_2_SLOPE 0x6E
+#define DS2781_FULL_1_SLOPE 0x6F
+#define DS2781_AE_4_SLOPE 0x70
+#define DS2781_AE_3_SLOPE 0x71
+#define DS2781_AE_2_SLOPE 0x72
+#define DS2781_AE_1_SLOPE 0x73
+#define DS2781_SE_4_SLOPE 0x74
+#define DS2781_SE_3_SLOPE 0x75
+#define DS2781_SE_2_SLOPE 0x76
+#define DS2781_SE_1_SLOPE 0x77
+#define DS2781_RSGAIN_MSB 0x78
+#define DS2781_RSGAIN_LSB 0x79
+#define DS2781_RSTC 0x7A
+#define DS2781_COB 0x7B
+#define DS2781_TBP34 0x7C
+#define DS2781_TBP23 0x7D
+#define DS2781_TBP12 0x7E
+#define DS2781_EEPROM_BLOCK1_END 0x7F
+/* Register 0x7D - 0xFF Reserved */
+
+#define DS2781_FSGAIN_MSB 0xB0
+#define DS2781_FSGAIN_LSB 0xB1
+
+/* Number of valid register addresses */
+#define DS2781_DATA_SIZE 0xB2
+
+/* Status register bits */
+#define DS2781_STATUS_CHGTF (1 << 7)
+#define DS2781_STATUS_AEF (1 << 6)
+#define DS2781_STATUS_SEF (1 << 5)
+#define DS2781_STATUS_LEARNF (1 << 4)
+/* Bit 3 Reserved */
+#define DS2781_STATUS_UVF (1 << 2)
+#define DS2781_STATUS_PORF (1 << 1)
+/* Bit 0 Reserved */
+
+/* Control register bits */
+/* Bit 7 Reserved */
+#define DS2781_CONTROL_NBEN (1 << 7)
+#define DS2781_CONTROL_UVEN (1 << 6)
+#define DS2781_CONTROL_PMOD (1 << 5)
+#define DS2781_CONTROL_RNAOP (1 << 4)
+#define DS1781_CONTROL_UVTH (1 << 3)
+/* Bit 0 - 2 Reserved */
+
+/* Special feature register bits */
+/* Bit 1 - 7 Reserved */
+#define DS2781_SFR_PIOSC (1 << 0)
+
+/* EEPROM register bits */
+#define DS2781_EEPROM_EEC (1 << 7)
+#define DS2781_EEPROM_LOCK (1 << 6)
+/* Bit 2 - 6 Reserved */
+#define DS2781_EEPROM_BL1 (1 << 1)
+#define DS2781_EEPROM_BL0 (1 << 0)
+
+extern int w1_ds2781_io(struct device *dev, char *buf, int addr, size_t count,
+ int io);
+extern int w1_ds2781_io_nolock(struct device *dev, char *buf, int addr,
+ size_t count, int io);
+extern int w1_ds2781_eeprom_cmd(struct device *dev, int addr, int cmd);
+
+#endif /* !_W1_DS2781_H */
diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h
index 490cda2281b..874aeb05011 100644
--- a/drivers/w1/w1_family.h
+++ b/drivers/w1/w1_family.h
@@ -38,6 +38,7 @@
#define W1_EEPROM_DS2431 0x2D
#define W1_FAMILY_DS2760 0x30
#define W1_FAMILY_DS2780 0x32
+#define W1_FAMILY_DS2781 0x3D
#define W1_THERM_DS28EA00 0x42
#define MAXNAMELEN 32