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-rw-r--r--drivers/mfd/wm831x-core.c9
-rw-r--r--drivers/power/Kconfig7
-rw-r--r--drivers/power/Makefile1
-rw-r--r--drivers/power/pcf50633-charger.c228
-rw-r--r--drivers/power/power_supply_sysfs.c5
-rw-r--r--drivers/power/wm831x_backup.c233
-rw-r--r--drivers/power/wm831x_power.c144
7 files changed, 410 insertions, 217 deletions
diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index 223a90c7492..4b2021af1d9 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -809,6 +809,9 @@ static struct resource wm831x_wdt_resources[] = {
static struct mfd_cell wm8310_devs[] = {
{
+ .name = "wm831x-backup",
+ },
+ {
.name = "wm831x-buckv",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
@@ -962,6 +965,9 @@ static struct mfd_cell wm8310_devs[] = {
static struct mfd_cell wm8311_devs[] = {
{
+ .name = "wm831x-backup",
+ },
+ {
.name = "wm831x-buckv",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
@@ -1096,6 +1102,9 @@ static struct mfd_cell wm8311_devs[] = {
static struct mfd_cell wm8312_devs[] = {
{
+ .name = "wm831x-backup",
+ },
+ {
.name = "wm831x-buckv",
.id = 1,
.num_resources = ARRAY_SIZE(wm831x_dcdc1_resources),
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 11867492551..d4b3d67f054 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -29,6 +29,13 @@ config APM_POWER
Say Y here to enable support APM status emulation using
battery class devices.
+config WM831X_BACKUP
+ tristate "WM831X backup battery charger support"
+ depends on MFD_WM831X
+ help
+ Say Y here to enable support for the backup battery charger
+ in the Wolfson Microelectronics WM831x PMICs.
+
config WM831X_POWER
tristate "WM831X PMU support"
depends on MFD_WM831X
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 356cdfd3c8b..573597c683b 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -16,6 +16,7 @@ obj-$(CONFIG_POWER_SUPPLY) += power_supply.o
obj-$(CONFIG_PDA_POWER) += pda_power.o
obj-$(CONFIG_APM_POWER) += apm_power.o
+obj-$(CONFIG_WM831X_BACKUP) += wm831x_backup.o
obj-$(CONFIG_WM831X_POWER) += wm831x_power.o
obj-$(CONFIG_WM8350_POWER) += wm8350_power.o
diff --git a/drivers/power/pcf50633-charger.c b/drivers/power/pcf50633-charger.c
index 6a84a8eb8d7..ea3fdfaca90 100644
--- a/drivers/power/pcf50633-charger.c
+++ b/drivers/power/pcf50633-charger.c
@@ -29,15 +29,12 @@
struct pcf50633_mbc {
struct pcf50633 *pcf;
- int adapter_active;
int adapter_online;
- int usb_active;
int usb_online;
struct power_supply usb;
struct power_supply adapter;
-
- struct delayed_work charging_restart_work;
+ struct power_supply ac;
};
int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
@@ -47,16 +44,21 @@ int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
u8 bits;
int charging_start = 1;
u8 mbcs2, chgmod;
+ unsigned int mbcc5;
- if (ma >= 1000)
+ if (ma >= 1000) {
bits = PCF50633_MBCC7_USB_1000mA;
- else if (ma >= 500)
+ ma = 1000;
+ } else if (ma >= 500) {
bits = PCF50633_MBCC7_USB_500mA;
- else if (ma >= 100)
+ ma = 500;
+ } else if (ma >= 100) {
bits = PCF50633_MBCC7_USB_100mA;
- else {
+ ma = 100;
+ } else {
bits = PCF50633_MBCC7_USB_SUSPEND;
charging_start = 0;
+ ma = 0;
}
ret = pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC7,
@@ -66,21 +68,40 @@ int pcf50633_mbc_usb_curlim_set(struct pcf50633 *pcf, int ma)
else
dev_info(pcf->dev, "usb curlim to %d mA\n", ma);
- /* Manual charging start */
- mbcs2 = pcf50633_reg_read(pcf, PCF50633_REG_MBCS2);
+ /*
+ * We limit the charging current to be the USB current limit.
+ * The reason is that on pcf50633, when it enters PMU Standby mode,
+ * which it does when the device goes "off", the USB current limit
+ * reverts to the variant default. In at least one common case, that
+ * default is 500mA. By setting the charging current to be the same
+ * as the USB limit we set here before PMU standby, we enforce it only
+ * using the correct amount of current even when the USB current limit
+ * gets reset to the wrong thing
+ */
+
+ if (mbc->pcf->pdata->charger_reference_current_ma) {
+ mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
+ if (mbcc5 > 255)
+ mbcc5 = 255;
+ pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
+ }
+
+ mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
/* If chgmod == BATFULL, setting chgena has no effect.
- * We need to set resume instead.
+ * Datasheet says we need to set resume instead but when autoresume is
+ * used resume doesn't work. Clear and set chgena instead.
*/
if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
- else
+ else {
+ pcf50633_reg_clear_bits(pcf, PCF50633_REG_MBCC1,
+ PCF50633_MBCC1_CHGENA);
pcf50633_reg_set_bit_mask(pcf, PCF50633_REG_MBCC1,
- PCF50633_MBCC1_RESUME, PCF50633_MBCC1_RESUME);
-
- mbc->usb_active = charging_start;
+ PCF50633_MBCC1_CHGENA, PCF50633_MBCC1_CHGENA);
+ }
power_supply_changed(&mbc->usb);
@@ -92,20 +113,44 @@ int pcf50633_mbc_get_status(struct pcf50633 *pcf)
{
struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
int status = 0;
+ u8 chgmod;
+
+ if (!mbc)
+ return 0;
+
+ chgmod = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2)
+ & PCF50633_MBCS2_MBC_MASK;
if (mbc->usb_online)
status |= PCF50633_MBC_USB_ONLINE;
- if (mbc->usb_active)
+ if (chgmod == PCF50633_MBCS2_MBC_USB_PRE ||
+ chgmod == PCF50633_MBCS2_MBC_USB_PRE_WAIT ||
+ chgmod == PCF50633_MBCS2_MBC_USB_FAST ||
+ chgmod == PCF50633_MBCS2_MBC_USB_FAST_WAIT)
status |= PCF50633_MBC_USB_ACTIVE;
if (mbc->adapter_online)
status |= PCF50633_MBC_ADAPTER_ONLINE;
- if (mbc->adapter_active)
+ if (chgmod == PCF50633_MBCS2_MBC_ADP_PRE ||
+ chgmod == PCF50633_MBCS2_MBC_ADP_PRE_WAIT ||
+ chgmod == PCF50633_MBCS2_MBC_ADP_FAST ||
+ chgmod == PCF50633_MBCS2_MBC_ADP_FAST_WAIT)
status |= PCF50633_MBC_ADAPTER_ACTIVE;
return status;
}
EXPORT_SYMBOL_GPL(pcf50633_mbc_get_status);
+int pcf50633_mbc_get_usb_online_status(struct pcf50633 *pcf)
+{
+ struct pcf50633_mbc *mbc = platform_get_drvdata(pcf->mbc_pdev);
+
+ if (!mbc)
+ return 0;
+
+ return mbc->usb_online;
+}
+EXPORT_SYMBOL_GPL(pcf50633_mbc_get_usb_online_status);
+
static ssize_t
show_chgmode(struct device *dev, struct device_attribute *attr, char *buf)
{
@@ -156,9 +201,55 @@ static ssize_t set_usblim(struct device *dev,
static DEVICE_ATTR(usb_curlim, S_IRUGO | S_IWUSR, show_usblim, set_usblim);
+static ssize_t
+show_chglim(struct device *dev, struct device_attribute *attr, char *buf)
+{
+ struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
+ u8 mbcc5 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC5);
+ unsigned int ma;
+
+ if (!mbc->pcf->pdata->charger_reference_current_ma)
+ return -ENODEV;
+
+ ma = (mbc->pcf->pdata->charger_reference_current_ma * mbcc5) >> 8;
+
+ return sprintf(buf, "%u\n", ma);
+}
+
+static ssize_t set_chglim(struct device *dev,
+ struct device_attribute *attr, const char *buf, size_t count)
+{
+ struct pcf50633_mbc *mbc = dev_get_drvdata(dev);
+ unsigned long ma;
+ unsigned int mbcc5;
+ int ret;
+
+ if (!mbc->pcf->pdata->charger_reference_current_ma)
+ return -ENODEV;
+
+ ret = strict_strtoul(buf, 10, &ma);
+ if (ret)
+ return -EINVAL;
+
+ mbcc5 = (ma << 8) / mbc->pcf->pdata->charger_reference_current_ma;
+ if (mbcc5 > 255)
+ mbcc5 = 255;
+ pcf50633_reg_write(mbc->pcf, PCF50633_REG_MBCC5, mbcc5);
+
+ return count;
+}
+
+/*
+ * This attribute allows to change MBC charging limit on the fly
+ * independently of usb current limit. It also gets set automatically every
+ * time usb current limit is changed.
+ */
+static DEVICE_ATTR(chg_curlim, S_IRUGO | S_IWUSR, show_chglim, set_chglim);
+
static struct attribute *pcf50633_mbc_sysfs_entries[] = {
&dev_attr_chgmode.attr,
&dev_attr_usb_curlim.attr,
+ &dev_attr_chg_curlim.attr,
NULL,
};
@@ -167,76 +258,26 @@ static struct attribute_group mbc_attr_group = {
.attrs = pcf50633_mbc_sysfs_entries,
};
-/* MBC state machine switches into charging mode when the battery voltage
- * falls below 96% of a battery float voltage. But the voltage drop in Li-ion
- * batteries is marginal(1~2 %) till about 80% of its capacity - which means,
- * after a BATFULL, charging won't be restarted until 80%.
- *
- * This work_struct function restarts charging at regular intervals to make
- * sure we don't discharge too much
- */
-
-static void pcf50633_mbc_charging_restart(struct work_struct *work)
-{
- struct pcf50633_mbc *mbc;
- u8 mbcs2, chgmod;
-
- mbc = container_of(work, struct pcf50633_mbc,
- charging_restart_work.work);
-
- mbcs2 = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCS2);
- chgmod = (mbcs2 & PCF50633_MBCS2_MBC_MASK);
-
- if (chgmod != PCF50633_MBCS2_MBC_BAT_FULL)
- return;
-
- /* Restart charging */
- pcf50633_reg_set_bit_mask(mbc->pcf, PCF50633_REG_MBCC1,
- PCF50633_MBCC1_RESUME, PCF50633_MBCC1_RESUME);
- mbc->usb_active = 1;
- power_supply_changed(&mbc->usb);
-
- dev_info(mbc->pcf->dev, "Charging restarted\n");
-}
-
static void
pcf50633_mbc_irq_handler(int irq, void *data)
{
struct pcf50633_mbc *mbc = data;
- int chg_restart_interval =
- mbc->pcf->pdata->charging_restart_interval;
/* USB */
if (irq == PCF50633_IRQ_USBINS) {
mbc->usb_online = 1;
} else if (irq == PCF50633_IRQ_USBREM) {
mbc->usb_online = 0;
- mbc->usb_active = 0;
pcf50633_mbc_usb_curlim_set(mbc->pcf, 0);
- cancel_delayed_work_sync(&mbc->charging_restart_work);
}
/* Adapter */
- if (irq == PCF50633_IRQ_ADPINS) {
+ if (irq == PCF50633_IRQ_ADPINS)
mbc->adapter_online = 1;
- mbc->adapter_active = 1;
- } else if (irq == PCF50633_IRQ_ADPREM) {
+ else if (irq == PCF50633_IRQ_ADPREM)
mbc->adapter_online = 0;
- mbc->adapter_active = 0;
- }
-
- if (irq == PCF50633_IRQ_BATFULL) {
- mbc->usb_active = 0;
- mbc->adapter_active = 0;
-
- if (chg_restart_interval > 0)
- schedule_delayed_work(&mbc->charging_restart_work,
- chg_restart_interval);
- } else if (irq == PCF50633_IRQ_USBLIMON)
- mbc->usb_active = 0;
- else if (irq == PCF50633_IRQ_USBLIMOFF)
- mbc->usb_active = 1;
+ power_supply_changed(&mbc->ac);
power_supply_changed(&mbc->usb);
power_supply_changed(&mbc->adapter);
@@ -269,10 +310,34 @@ static int usb_get_property(struct power_supply *psy,
{
struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, usb);
int ret = 0;
+ u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
+ PCF50633_MBCC7_USB_MASK;
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
- val->intval = mbc->usb_online;
+ val->intval = mbc->usb_online &&
+ (usblim <= PCF50633_MBCC7_USB_500mA);
+ break;
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ return ret;
+}
+
+static int ac_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct pcf50633_mbc *mbc = container_of(psy, struct pcf50633_mbc, ac);
+ int ret = 0;
+ u8 usblim = pcf50633_reg_read(mbc->pcf, PCF50633_REG_MBCC7) &
+ PCF50633_MBCC7_USB_MASK;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = mbc->usb_online &&
+ (usblim == PCF50633_MBCC7_USB_1000mA);
break;
default:
ret = -EINVAL;
@@ -336,6 +401,14 @@ static int __devinit pcf50633_mbc_probe(struct platform_device *pdev)
mbc->usb.supplied_to = mbc->pcf->pdata->batteries;
mbc->usb.num_supplicants = mbc->pcf->pdata->num_batteries;
+ mbc->ac.name = "ac";
+ mbc->ac.type = POWER_SUPPLY_TYPE_MAINS;
+ mbc->ac.properties = power_props;
+ mbc->ac.num_properties = ARRAY_SIZE(power_props);
+ mbc->ac.get_property = ac_get_property;
+ mbc->ac.supplied_to = mbc->pcf->pdata->batteries;
+ mbc->ac.num_supplicants = mbc->pcf->pdata->num_batteries;
+
ret = power_supply_register(&pdev->dev, &mbc->adapter);
if (ret) {
dev_err(mbc->pcf->dev, "failed to register adapter\n");
@@ -351,8 +424,14 @@ static int __devinit pcf50633_mbc_probe(struct platform_device *pdev)
return ret;
}
- INIT_DELAYED_WORK(&mbc->charging_restart_work,
- pcf50633_mbc_charging_restart);
+ ret = power_supply_register(&pdev->dev, &mbc->ac);
+ if (ret) {
+ dev_err(mbc->pcf->dev, "failed to register ac\n");
+ power_supply_unregister(&mbc->adapter);
+ power_supply_unregister(&mbc->usb);
+ kfree(mbc);
+ return ret;
+ }
ret = sysfs_create_group(&pdev->dev.kobj, &mbc_attr_group);
if (ret)
@@ -378,8 +457,7 @@ static int __devexit pcf50633_mbc_remove(struct platform_device *pdev)
power_supply_unregister(&mbc->usb);
power_supply_unregister(&mbc->adapter);
-
- cancel_delayed_work_sync(&mbc->charging_restart_work);
+ power_supply_unregister(&mbc->ac);
kfree(mbc);
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index 08144393d64..c790e0c77d4 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -65,7 +65,10 @@ static ssize_t power_supply_show_property(struct device *dev,
ret = psy->get_property(psy, off, &value);
if (ret < 0) {
- if (ret != -ENODEV)
+ if (ret == -ENODATA)
+ dev_dbg(dev, "driver has no data for `%s' property\n",
+ attr->attr.name);
+ else if (ret != -ENODEV)
dev_err(dev, "driver failed to report `%s' property\n",
attr->attr.name);
return ret;
diff --git a/drivers/power/wm831x_backup.c b/drivers/power/wm831x_backup.c
new file mode 100644
index 00000000000..bf4f387a800
--- /dev/null
+++ b/drivers/power/wm831x_backup.c
@@ -0,0 +1,233 @@
+/*
+ * Backup battery driver for Wolfson Microelectronics wm831x PMICs
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * 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/err.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+
+#include <linux/mfd/wm831x/core.h>
+#include <linux/mfd/wm831x/auxadc.h>
+#include <linux/mfd/wm831x/pmu.h>
+#include <linux/mfd/wm831x/pdata.h>
+
+struct wm831x_backup {
+ struct wm831x *wm831x;
+ struct power_supply backup;
+};
+
+static int wm831x_backup_read_voltage(struct wm831x *wm831x,
+ enum wm831x_auxadc src,
+ union power_supply_propval *val)
+{
+ int ret;
+
+ ret = wm831x_auxadc_read_uv(wm831x, src);
+ if (ret >= 0)
+ val->intval = ret;
+
+ return ret;
+}
+
+/*********************************************************************
+ * Backup supply properties
+ *********************************************************************/
+
+static void wm831x_config_backup(struct wm831x *wm831x)
+{
+ struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
+ struct wm831x_backup_pdata *pdata;
+ int ret, reg;
+
+ if (!wm831x_pdata || !wm831x_pdata->backup) {
+ dev_warn(wm831x->dev,
+ "No backup battery charger configuration\n");
+ return;
+ }
+
+ pdata = wm831x_pdata->backup;
+
+ reg = 0;
+
+ if (pdata->charger_enable)
+ reg |= WM831X_BKUP_CHG_ENA | WM831X_BKUP_BATT_DET_ENA;
+ if (pdata->no_constant_voltage)
+ reg |= WM831X_BKUP_CHG_MODE;
+
+ switch (pdata->vlim) {
+ case 2500:
+ break;
+ case 3100:
+ reg |= WM831X_BKUP_CHG_VLIM;
+ break;
+ default:
+ dev_err(wm831x->dev, "Invalid backup voltage limit %dmV\n",
+ pdata->vlim);
+ }
+
+ switch (pdata->ilim) {
+ case 100:
+ break;
+ case 200:
+ reg |= 1;
+ break;
+ case 300:
+ reg |= 2;
+ break;
+ case 400:
+ reg |= 3;
+ break;
+ default:
+ dev_err(wm831x->dev, "Invalid backup current limit %duA\n",
+ pdata->ilim);
+ }
+
+ ret = wm831x_reg_unlock(wm831x);
+ if (ret != 0) {
+ dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
+ return;
+ }
+
+ ret = wm831x_set_bits(wm831x, WM831X_BACKUP_CHARGER_CONTROL,
+ WM831X_BKUP_CHG_ENA_MASK |
+ WM831X_BKUP_CHG_MODE_MASK |
+ WM831X_BKUP_BATT_DET_ENA_MASK |
+ WM831X_BKUP_CHG_VLIM_MASK |
+ WM831X_BKUP_CHG_ILIM_MASK,
+ reg);
+ if (ret != 0)
+ dev_err(wm831x->dev,
+ "Failed to set backup charger config: %d\n", ret);
+
+ wm831x_reg_lock(wm831x);
+}
+
+static int wm831x_backup_get_prop(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct wm831x_backup *devdata = dev_get_drvdata(psy->dev->parent);
+ struct wm831x *wm831x = devdata->wm831x;
+ int ret = 0;
+
+ ret = wm831x_reg_read(wm831x, WM831X_BACKUP_CHARGER_CONTROL);
+ if (ret < 0)
+ return ret;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ if (ret & WM831X_BKUP_CHG_STS)
+ val->intval = POWER_SUPPLY_STATUS_CHARGING;
+ else
+ val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
+ break;
+
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ ret = wm831x_backup_read_voltage(wm831x, WM831X_AUX_BKUP_BATT,
+ val);
+ break;
+
+ case POWER_SUPPLY_PROP_PRESENT:
+ if (ret & WM831X_BKUP_CHG_STS)
+ val->intval = 1;
+ else
+ val->intval = 0;
+ break;
+
+ default:
+ ret = -EINVAL;
+ break;
+ }
+
+ return ret;
+}
+
+static enum power_supply_property wm831x_backup_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_PRESENT,
+};
+
+/*********************************************************************
+ * Initialisation
+ *********************************************************************/
+
+static __devinit int wm831x_backup_probe(struct platform_device *pdev)
+{
+ struct wm831x *wm831x = dev_get_drvdata(pdev->dev.parent);
+ struct wm831x_backup *devdata;
+ struct power_supply *backup;
+ int ret;
+
+ devdata = kzalloc(sizeof(struct wm831x_backup), GFP_KERNEL);
+ if (devdata == NULL)
+ return -ENOMEM;
+
+ devdata->wm831x = wm831x;
+ platform_set_drvdata(pdev, devdata);
+
+ backup = &devdata->backup;
+
+ /* We ignore configuration failures since we can still read
+ * back the status without enabling the charger (which may
+ * already be enabled anyway).
+ */
+ wm831x_config_backup(wm831x);
+
+ backup->name = "wm831x-backup";
+ backup->type = POWER_SUPPLY_TYPE_BATTERY;
+ backup->properties = wm831x_backup_props;
+ backup->num_properties = ARRAY_SIZE(wm831x_backup_props);
+ backup->get_property = wm831x_backup_get_prop;
+ ret = power_supply_register(&pdev->dev, backup);
+ if (ret)
+ goto err_kmalloc;
+
+ return ret;
+
+err_kmalloc:
+ kfree(devdata);
+ return ret;
+}
+
+static __devexit int wm831x_backup_remove(struct platform_device *pdev)
+{
+ struct wm831x_backup *devdata = platform_get_drvdata(pdev);
+
+ power_supply_unregister(&devdata->backup);
+ kfree(devdata);
+
+ return 0;
+}
+
+static struct platform_driver wm831x_backup_driver = {
+ .probe = wm831x_backup_probe,
+ .remove = __devexit_p(wm831x_backup_remove),
+ .driver = {
+ .name = "wm831x-backup",
+ },
+};
+
+static int __init wm831x_backup_init(void)
+{
+ return platform_driver_register(&wm831x_backup_driver);
+}
+module_init(wm831x_backup_init);
+
+static void __exit wm831x_backup_exit(void)
+{
+ platform_driver_unregister(&wm831x_backup_driver);
+}
+module_exit(wm831x_backup_exit);
+
+MODULE_DESCRIPTION("Backup battery charger driver for WM831x PMICs");
+MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:wm831x-backup");
diff --git a/drivers/power/wm831x_power.c b/drivers/power/wm831x_power.c
index 2a4c8b0b829..f85e80b1b40 100644
--- a/drivers/power/wm831x_power.c
+++ b/drivers/power/wm831x_power.c
@@ -21,7 +21,6 @@
struct wm831x_power {
struct wm831x *wm831x;
struct power_supply wall;
- struct power_supply backup;
struct power_supply usb;
struct power_supply battery;
};
@@ -454,125 +453,6 @@ static irqreturn_t wm831x_bat_irq(int irq, void *data)
/*********************************************************************
- * Backup supply properties
- *********************************************************************/
-
-static void wm831x_config_backup(struct wm831x *wm831x)
-{
- struct wm831x_pdata *wm831x_pdata = wm831x->dev->platform_data;
- struct wm831x_backup_pdata *pdata;
- int ret, reg;
-
- if (!wm831x_pdata || !wm831x_pdata->backup) {
- dev_warn(wm831x->dev,
- "No backup battery charger configuration\n");
- return;
- }
-
- pdata = wm831x_pdata->backup;
-
- reg = 0;
-
- if (pdata->charger_enable)
- reg |= WM831X_BKUP_CHG_ENA | WM831X_BKUP_BATT_DET_ENA;
- if (pdata->no_constant_voltage)
- reg |= WM831X_BKUP_CHG_MODE;
-
- switch (pdata->vlim) {
- case 2500:
- break;
- case 3100:
- reg |= WM831X_BKUP_CHG_VLIM;
- break;
- default:
- dev_err(wm831x->dev, "Invalid backup voltage limit %dmV\n",
- pdata->vlim);
- }
-
- switch (pdata->ilim) {
- case 100:
- break;
- case 200:
- reg |= 1;
- break;
- case 300:
- reg |= 2;
- break;
- case 400:
- reg |= 3;
- break;
- default:
- dev_err(wm831x->dev, "Invalid backup current limit %duA\n",
- pdata->ilim);
- }
-
- ret = wm831x_reg_unlock(wm831x);
- if (ret != 0) {
- dev_err(wm831x->dev, "Failed to unlock registers: %d\n", ret);
- return;
- }
-
- ret = wm831x_set_bits(wm831x, WM831X_BACKUP_CHARGER_CONTROL,
- WM831X_BKUP_CHG_ENA_MASK |
- WM831X_BKUP_CHG_MODE_MASK |
- WM831X_BKUP_BATT_DET_ENA_MASK |
- WM831X_BKUP_CHG_VLIM_MASK |
- WM831X_BKUP_CHG_ILIM_MASK,
- reg);
- if (ret != 0)
- dev_err(wm831x->dev,
- "Failed to set backup charger config: %d\n", ret);
-
- wm831x_reg_lock(wm831x);
-}
-
-static int wm831x_backup_get_prop(struct power_supply *psy,
- enum power_supply_property psp,
- union power_supply_propval *val)
-{
- struct wm831x_power *wm831x_power = dev_get_drvdata(psy->dev->parent);
- struct wm831x *wm831x = wm831x_power->wm831x;
- int ret = 0;
-
- ret = wm831x_reg_read(wm831x, WM831X_BACKUP_CHARGER_CONTROL);
- if (ret < 0)
- return ret;
-
- switch (psp) {
- case POWER_SUPPLY_PROP_STATUS:
- if (ret & WM831X_BKUP_CHG_STS)
- val->intval = POWER_SUPPLY_STATUS_CHARGING;
- else
- val->intval = POWER_SUPPLY_STATUS_NOT_CHARGING;
- break;
-
- case POWER_SUPPLY_PROP_VOLTAGE_NOW:
- ret = wm831x_power_read_voltage(wm831x, WM831X_AUX_BKUP_BATT,
- val);
- break;
-
- case POWER_SUPPLY_PROP_PRESENT:
- if (ret & WM831X_BKUP_CHG_STS)
- val->intval = 1;
- else
- val->intval = 0;
- break;
-
- default:
- ret = -EINVAL;
- break;
- }
-
- return ret;
-}
-
-static enum power_supply_property wm831x_backup_props[] = {
- POWER_SUPPLY_PROP_STATUS,
- POWER_SUPPLY_PROP_VOLTAGE_NOW,
- POWER_SUPPLY_PROP_PRESENT,
-};
-
-/*********************************************************************
* Initialisation
*********************************************************************/
@@ -595,10 +475,7 @@ static irqreturn_t wm831x_pwr_src_irq(int irq, void *data)
dev_dbg(wm831x->dev, "Power source changed\n");
- /* Just notify for everything - little harm in overnotifying.
- * The backup battery is not a power source while the system
- * is running so skip that.
- */
+ /* Just notify for everything - little harm in overnotifying. */
power_supply_changed(&wm831x_power->battery);
power_supply_changed(&wm831x_power->usb);
power_supply_changed(&wm831x_power->wall);
@@ -613,7 +490,6 @@ static __devinit int wm831x_power_probe(struct platform_device *pdev)
struct power_supply *usb;
struct power_supply *battery;
struct power_supply *wall;
- struct power_supply *backup;
int ret, irq, i;
power = kzalloc(sizeof(struct wm831x_power), GFP_KERNEL);
@@ -626,13 +502,11 @@ static __devinit int wm831x_power_probe(struct platform_device *pdev)
usb = &power->usb;
battery = &power->battery;
wall = &power->wall;
- backup = &power->backup;
/* We ignore configuration failures since we can still read back
- * the status without enabling either of the chargers.
+ * the status without enabling the charger.
*/
wm831x_config_battery(wm831x);
- wm831x_config_backup(wm831x);
wall->name = "wm831x-wall";
wall->type = POWER_SUPPLY_TYPE_MAINS;
@@ -661,15 +535,6 @@ static __devinit int wm831x_power_probe(struct platform_device *pdev)
if (ret)
goto err_battery;
- backup->name = "wm831x-backup";
- backup->type = POWER_SUPPLY_TYPE_BATTERY;
- backup->properties = wm831x_backup_props;
- backup->num_properties = ARRAY_SIZE(wm831x_backup_props);
- backup->get_property = wm831x_backup_get_prop;
- ret = power_supply_register(&pdev->dev, backup);
- if (ret)
- goto err_usb;
-
irq = platform_get_irq_byname(pdev, "SYSLO");
ret = wm831x_request_irq(wm831x, irq, wm831x_syslo_irq,
IRQF_TRIGGER_RISING, "SYSLO",
@@ -677,7 +542,7 @@ static __devinit int wm831x_power_probe(struct platform_device *pdev)
if (ret != 0) {
dev_err(&pdev->dev, "Failed to request SYSLO IRQ %d: %d\n",
irq, ret);
- goto err_backup;
+ goto err_usb;
}
irq = platform_get_irq_byname(pdev, "PWR SRC");
@@ -716,8 +581,6 @@ err_bat_irq:
err_syslo:
irq = platform_get_irq_byname(pdev, "SYSLO");
wm831x_free_irq(wm831x, irq, power);
-err_backup:
- power_supply_unregister(backup);
err_usb:
power_supply_unregister(usb);
err_battery:
@@ -746,7 +609,6 @@ static __devexit int wm831x_power_remove(struct platform_device *pdev)
irq = platform_get_irq_byname(pdev, "SYSLO");
wm831x_free_irq(wm831x, irq, wm831x_power);
- power_supply_unregister(&wm831x_power->backup);
power_supply_unregister(&wm831x_power->battery);
power_supply_unregister(&wm831x_power->wall);
power_supply_unregister(&wm831x_power->usb);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-11-27 00:17:43 +0000