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-rw-r--r--drivers/base/Kconfig17
-rw-r--r--drivers/base/base.h3
-rw-r--r--drivers/base/dd.c26
-rw-r--r--drivers/base/devres.c97
-rw-r--r--drivers/base/dma-buf.c2
-rw-r--r--drivers/base/dma-coherent.c10
-rw-r--r--drivers/base/dma-contiguous.c34
-rw-r--r--drivers/base/dma-mapping.c6
-rw-r--r--drivers/base/power/domain.c2
-rw-r--r--drivers/base/regmap/regcache-rbtree.c8
-rw-r--r--drivers/base/regmap/regmap-i2c.c104
-rw-r--r--drivers/base/regmap/regmap-irq.c9
-rw-r--r--drivers/base/regmap/regmap-mmio.c35
-rw-r--r--drivers/base/regmap/regmap.c83
14 files changed, 365 insertions, 71 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 8fa8deab644..4b7b4522b64 100644
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -1,10 +1,10 @@
menu "Generic Driver Options"
-config UEVENT_HELPER_PATH
- string "path to uevent helper"
- default ""
+config UEVENT_HELPER
+ bool "Support for uevent helper"
+ default y
help
- Path to uevent helper program forked by the kernel for
+ The uevent helper program is forked by the kernel for
every uevent.
Before the switch to the netlink-based uevent source, this was
used to hook hotplug scripts into kernel device events. It
@@ -15,8 +15,13 @@ config UEVENT_HELPER_PATH
that it creates a high system load, or on smaller systems
it is known to create out-of-memory situations during bootup.
- To disable user space helper program execution at early boot
- time specify an empty string here. This setting can be altered
+config UEVENT_HELPER_PATH
+ string "path to uevent helper"
+ depends on UEVENT_HELPER
+ default ""
+ help
+ To disable user space helper program execution at by default
+ specify an empty string here. This setting can still be altered
via /proc/sys/kernel/hotplug or via /sys/kernel/uevent_helper
later at runtime.
diff --git a/drivers/base/base.h b/drivers/base/base.h
index 24f424249d9..251c5d30f96 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -63,8 +63,6 @@ struct driver_private {
* 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
* associated with.
*
@@ -76,7 +74,6 @@ struct device_private {
struct klist_node knode_driver;
struct klist_node knode_bus;
struct list_head deferred_probe;
- void *driver_data;
struct device *device;
};
#define to_device_private_parent(obj) \
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 62ec61e8f84..e4ffbcf2f51 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -587,29 +587,3 @@ void driver_detach(struct device_driver *drv)
put_device(dev);
}
}
-
-/*
- * These exports can't be _GPL due to .h files using this within them, and it
- * might break something that was previously working...
- */
-void *dev_get_drvdata(const struct device *dev)
-{
- if (dev && dev->p)
- return dev->p->driver_data;
- return NULL;
-}
-EXPORT_SYMBOL(dev_get_drvdata);
-
-int dev_set_drvdata(struct device *dev, void *data)
-{
- int error;
-
- if (!dev->p) {
- error = device_private_init(dev);
- if (error)
- return error;
- }
- dev->p->driver_data = data;
- return 0;
-}
-EXPORT_SYMBOL(dev_set_drvdata);
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index db4e264eecb..52302946770 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -831,3 +831,100 @@ void devm_kfree(struct device *dev, void *p)
WARN_ON(rc);
}
EXPORT_SYMBOL_GPL(devm_kfree);
+
+/**
+ * devm_kmemdup - Resource-managed kmemdup
+ * @dev: Device this memory belongs to
+ * @src: Memory region to duplicate
+ * @len: Memory region length
+ * @gfp: GFP mask to use
+ *
+ * Duplicate region of a memory using resource managed kmalloc
+ */
+void *devm_kmemdup(struct device *dev, const void *src, size_t len, gfp_t gfp)
+{
+ void *p;
+
+ p = devm_kmalloc(dev, len, gfp);
+ if (p)
+ memcpy(p, src, len);
+
+ return p;
+}
+EXPORT_SYMBOL_GPL(devm_kmemdup);
+
+struct pages_devres {
+ unsigned long addr;
+ unsigned int order;
+};
+
+static int devm_pages_match(struct device *dev, void *res, void *p)
+{
+ struct pages_devres *devres = res;
+ struct pages_devres *target = p;
+
+ return devres->addr == target->addr;
+}
+
+static void devm_pages_release(struct device *dev, void *res)
+{
+ struct pages_devres *devres = res;
+
+ free_pages(devres->addr, devres->order);
+}
+
+/**
+ * devm_get_free_pages - Resource-managed __get_free_pages
+ * @dev: Device to allocate memory for
+ * @gfp_mask: Allocation gfp flags
+ * @order: Allocation size is (1 << order) pages
+ *
+ * Managed get_free_pages. Memory allocated with this function is
+ * automatically freed on driver detach.
+ *
+ * RETURNS:
+ * Address of allocated memory on success, 0 on failure.
+ */
+
+unsigned long devm_get_free_pages(struct device *dev,
+ gfp_t gfp_mask, unsigned int order)
+{
+ struct pages_devres *devres;
+ unsigned long addr;
+
+ addr = __get_free_pages(gfp_mask, order);
+
+ if (unlikely(!addr))
+ return 0;
+
+ devres = devres_alloc(devm_pages_release,
+ sizeof(struct pages_devres), GFP_KERNEL);
+ if (unlikely(!devres)) {
+ free_pages(addr, order);
+ return 0;
+ }
+
+ devres->addr = addr;
+ devres->order = order;
+
+ devres_add(dev, devres);
+ return addr;
+}
+EXPORT_SYMBOL_GPL(devm_get_free_pages);
+
+/**
+ * devm_free_pages - Resource-managed free_pages
+ * @dev: Device this memory belongs to
+ * @addr: Memory to free
+ *
+ * Free memory allocated with devm_get_free_pages(). Unlike free_pages,
+ * there is no need to supply the @order.
+ */
+void devm_free_pages(struct device *dev, unsigned long addr)
+{
+ struct pages_devres devres = { .addr = addr };
+
+ WARN_ON(devres_release(dev, devm_pages_release, devm_pages_match,
+ &devres));
+}
+EXPORT_SYMBOL_GPL(devm_free_pages);
diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c
index ea77701deda..840c7fa8098 100644
--- a/drivers/base/dma-buf.c
+++ b/drivers/base/dma-buf.c
@@ -491,7 +491,7 @@ EXPORT_SYMBOL_GPL(dma_buf_kunmap);
* dma-buf buffer.
*
* This function adjusts the passed in vma so that it points at the file of the
- * dma_buf operation. It alsog adjusts the starting pgoff and does bounds
+ * dma_buf operation. It also adjusts the starting pgoff and does bounds
* checking on the size of the vma. Then it calls the exporters mmap function to
* set up the mapping.
*
diff --git a/drivers/base/dma-coherent.c b/drivers/base/dma-coherent.c
index bc256b64102..7d6e84a5142 100644
--- a/drivers/base/dma-coherent.c
+++ b/drivers/base/dma-coherent.c
@@ -10,13 +10,13 @@
struct dma_coherent_mem {
void *virt_base;
dma_addr_t device_base;
- phys_addr_t pfn_base;
+ unsigned long pfn_base;
int size;
int flags;
unsigned long *bitmap;
};
-int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
dma_addr_t device_addr, size_t size, int flags)
{
void __iomem *mem_base = NULL;
@@ -32,7 +32,7 @@ int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
/* FIXME: this routine just ignores DMA_MEMORY_INCLUDES_CHILDREN */
- mem_base = ioremap(bus_addr, size);
+ mem_base = ioremap(phys_addr, size);
if (!mem_base)
goto out;
@@ -45,7 +45,7 @@ int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
dev->dma_mem->virt_base = mem_base;
dev->dma_mem->device_base = device_addr;
- dev->dma_mem->pfn_base = PFN_DOWN(bus_addr);
+ dev->dma_mem->pfn_base = PFN_DOWN(phys_addr);
dev->dma_mem->size = pages;
dev->dma_mem->flags = flags;
@@ -208,7 +208,7 @@ int dma_mmap_from_coherent(struct device *dev, struct vm_area_struct *vma,
*ret = -ENXIO;
if (off < count && user_count <= count - off) {
- unsigned pfn = mem->pfn_base + start + off;
+ unsigned long pfn = mem->pfn_base + start + off;
*ret = remap_pfn_range(vma, vma->vm_start, pfn,
user_count << PAGE_SHIFT,
vma->vm_page_prot);
diff --git a/drivers/base/dma-contiguous.c b/drivers/base/dma-contiguous.c
index 165c2c299e5..c34ec336424 100644
--- a/drivers/base/dma-contiguous.c
+++ b/drivers/base/dma-contiguous.c
@@ -37,6 +37,7 @@ struct cma {
unsigned long base_pfn;
unsigned long count;
unsigned long *bitmap;
+ struct mutex lock;
};
struct cma *dma_contiguous_default_area;
@@ -161,6 +162,7 @@ static int __init cma_activate_area(struct cma *cma)
init_cma_reserved_pageblock(pfn_to_page(base_pfn));
} while (--i);
+ mutex_init(&cma->lock);
return 0;
}
@@ -261,6 +263,13 @@ err:
return ret;
}
+static void clear_cma_bitmap(struct cma *cma, unsigned long pfn, int count)
+{
+ mutex_lock(&cma->lock);
+ bitmap_clear(cma->bitmap, pfn - cma->base_pfn, count);
+ mutex_unlock(&cma->lock);
+}
+
/**
* dma_alloc_from_contiguous() - allocate pages from contiguous area
* @dev: Pointer to device for which the allocation is performed.
@@ -269,7 +278,7 @@ err:
*
* This function allocates memory buffer for specified device. It uses
* device specific contiguous memory area if available or the default
- * global one. Requires architecture specific get_dev_cma_area() helper
+ * global one. Requires architecture specific dev_get_cma_area() helper
* function.
*/
struct page *dma_alloc_from_contiguous(struct device *dev, int count,
@@ -294,30 +303,41 @@ struct page *dma_alloc_from_contiguous(struct device *dev, int count,
mask = (1 << align) - 1;
- mutex_lock(&cma_mutex);
for (;;) {
+ mutex_lock(&cma->lock);
pageno = bitmap_find_next_zero_area(cma->bitmap, cma->count,
start, count, mask);
- if (pageno >= cma->count)
+ if (pageno >= cma->count) {
+ mutex_unlock(&cma->lock);
break;
+ }
+ bitmap_set(cma->bitmap, pageno, count);
+ /*
+ * It's safe to drop the lock here. We've marked this region for
+ * our exclusive use. If the migration fails we will take the
+ * lock again and unmark it.
+ */
+ mutex_unlock(&cma->lock);
pfn = cma->base_pfn + pageno;
+ mutex_lock(&cma_mutex);
ret = alloc_contig_range(pfn, pfn + count, MIGRATE_CMA);
+ mutex_unlock(&cma_mutex);
if (ret == 0) {
- bitmap_set(cma->bitmap, pageno, count);
page = pfn_to_page(pfn);
break;
} else if (ret != -EBUSY) {
+ clear_cma_bitmap(cma, pfn, count);
break;
}
+ clear_cma_bitmap(cma, pfn, count);
pr_debug("%s(): memory range at %p is busy, retrying\n",
__func__, pfn_to_page(pfn));
/* try again with a bit different memory target */
start = pageno + mask + 1;
}
- mutex_unlock(&cma_mutex);
pr_debug("%s(): returned %p\n", __func__, page);
return page;
}
@@ -350,10 +370,8 @@ bool dma_release_from_contiguous(struct device *dev, struct page *pages,
VM_BUG_ON(pfn + count > cma->base_pfn + cma->count);
- mutex_lock(&cma_mutex);
- bitmap_clear(cma->bitmap, pfn - cma->base_pfn, count);
free_contig_range(pfn, count);
- mutex_unlock(&cma_mutex);
+ clear_cma_bitmap(cma, pfn, count);
return true;
}
diff --git a/drivers/base/dma-mapping.c b/drivers/base/dma-mapping.c
index 0ce39a33b3c..6cd08e145bf 100644
--- a/drivers/base/dma-mapping.c
+++ b/drivers/base/dma-mapping.c
@@ -175,7 +175,7 @@ static void dmam_coherent_decl_release(struct device *dev, void *res)
/**
* dmam_declare_coherent_memory - Managed dma_declare_coherent_memory()
* @dev: Device to declare coherent memory for
- * @bus_addr: Bus address of coherent memory to be declared
+ * @phys_addr: Physical address of coherent memory to be declared
* @device_addr: Device address of coherent memory to be declared
* @size: Size of coherent memory to be declared
* @flags: Flags
@@ -185,7 +185,7 @@ static void dmam_coherent_decl_release(struct device *dev, void *res)
* RETURNS:
* 0 on success, -errno on failure.
*/
-int dmam_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
+int dmam_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
dma_addr_t device_addr, size_t size, int flags)
{
void *res;
@@ -195,7 +195,7 @@ int dmam_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
if (!res)
return -ENOMEM;
- rc = dma_declare_coherent_memory(dev, bus_addr, device_addr, size,
+ rc = dma_declare_coherent_memory(dev, phys_addr, device_addr, size,
flags);
if (rc == 0)
devres_add(dev, res);
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index ae098a261fc..eee55c1e5fd 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -105,7 +105,7 @@ static bool genpd_sd_counter_dec(struct generic_pm_domain *genpd)
static void genpd_sd_counter_inc(struct generic_pm_domain *genpd)
{
atomic_inc(&genpd->sd_count);
- smp_mb__after_atomic_inc();
+ smp_mb__after_atomic();
}
static void genpd_acquire_lock(struct generic_pm_domain *genpd)
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 930cad4e5df..6a7e4fa1285 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -23,16 +23,16 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
static int regcache_rbtree_exit(struct regmap *map);
struct regcache_rbtree_node {
- /* the actual rbtree node holding this block */
- struct rb_node node;
- /* base register handled by this block */
- unsigned int base_reg;
/* block of adjacent registers */
void *block;
/* Which registers are present */
long *cache_present;
+ /* base register handled by this block */
+ unsigned int base_reg;
/* number of registers available in the block */
unsigned int blklen;
+ /* the actual rbtree node holding this block */
+ struct rb_node node;
} __attribute__ ((packed));
struct regcache_rbtree_ctx {
diff --git a/drivers/base/regmap/regmap-i2c.c b/drivers/base/regmap/regmap-i2c.c
index ebd18952976..ca193d1ef47 100644
--- a/drivers/base/regmap/regmap-i2c.c
+++ b/drivers/base/regmap/regmap-i2c.c
@@ -14,6 +14,79 @@
#include <linux/i2c.h>
#include <linux/module.h>
+
+static int regmap_smbus_byte_reg_read(void *context, unsigned int reg,
+ unsigned int *val)
+{
+ struct device *dev = context;
+ struct i2c_client *i2c = to_i2c_client(dev);
+ int ret;
+
+ if (reg > 0xff)
+ return -EINVAL;
+
+ ret = i2c_smbus_read_byte_data(i2c, reg);
+ if (ret < 0)
+ return ret;
+
+ *val = ret;
+
+ return 0;
+}
+
+static int regmap_smbus_byte_reg_write(void *context, unsigned int reg,
+ unsigned int val)
+{
+ struct device *dev = context;
+ struct i2c_client *i2c = to_i2c_client(dev);
+
+ if (val > 0xff || reg > 0xff)
+ return -EINVAL;
+
+ return i2c_smbus_write_byte_data(i2c, reg, val);
+}
+
+static struct regmap_bus regmap_smbus_byte = {
+ .reg_write = regmap_smbus_byte_reg_write,
+ .reg_read = regmap_smbus_byte_reg_read,
+};
+
+static int regmap_smbus_word_reg_read(void *context, unsigned int reg,
+ unsigned int *val)
+{
+ struct device *dev = context;
+ struct i2c_client *i2c = to_i2c_client(dev);
+ int ret;
+
+ if (reg > 0xff)
+ return -EINVAL;
+
+ ret = i2c_smbus_read_word_data(i2c, reg);
+ if (ret < 0)
+ return ret;
+
+ *val = ret;
+
+ return 0;
+}
+
+static int regmap_smbus_word_reg_write(void *context, unsigned int reg,
+ unsigned int val)
+{
+ struct device *dev = context;
+ struct i2c_client *i2c = to_i2c_client(dev);
+
+ if (val > 0xffff || reg > 0xff)
+ return -EINVAL;
+
+ return i2c_smbus_write_word_data(i2c, reg, val);
+}
+
+static struct regmap_bus regmap_smbus_word = {
+ .reg_write = regmap_smbus_word_reg_write,
+ .reg_read = regmap_smbus_word_reg_read,
+};
+
static int regmap_i2c_write(void *context, const void *data, size_t count)
{
struct device *dev = context;
@@ -97,6 +170,23 @@ static struct regmap_bus regmap_i2c = {
.read = regmap_i2c_read,
};
+static const struct regmap_bus *regmap_get_i2c_bus(struct i2c_client *i2c,
+ const struct regmap_config *config)
+{
+ if (i2c_check_functionality(i2c->adapter, I2C_FUNC_I2C))
+ return &regmap_i2c;
+ else if (config->val_bits == 16 && config->reg_bits == 8 &&
+ i2c_check_functionality(i2c->adapter,
+ I2C_FUNC_SMBUS_WORD_DATA))
+ return &regmap_smbus_word;
+ else if (config->val_bits == 8 && config->reg_bits == 8 &&
+ i2c_check_functionality(i2c->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA))
+ return &regmap_smbus_byte;
+
+ return ERR_PTR(-ENOTSUPP);
+}
+
/**
* regmap_init_i2c(): Initialise register map
*
@@ -109,7 +199,12 @@ static struct regmap_bus regmap_i2c = {
struct regmap *regmap_init_i2c(struct i2c_client *i2c,
const struct regmap_config *config)
{
- return regmap_init(&i2c->dev, &regmap_i2c, &i2c->dev, config);
+ const struct regmap_bus *bus = regmap_get_i2c_bus(i2c, config);
+
+ if (IS_ERR(bus))
+ return ERR_CAST(bus);
+
+ return regmap_init(&i2c->dev, bus, &i2c->dev, config);
}
EXPORT_SYMBOL_GPL(regmap_init_i2c);
@@ -126,7 +221,12 @@ EXPORT_SYMBOL_GPL(regmap_init_i2c);
struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,
const struct regmap_config *config)
{
- return devm_regmap_init(&i2c->dev, &regmap_i2c, &i2c->dev, config);
+ const struct regmap_bus *bus = regmap_get_i2c_bus(i2c, config);
+
+ if (IS_ERR(bus))
+ return ERR_CAST(bus);
+
+ return devm_regmap_init(&i2c->dev, bus, &i2c->dev, config);
}
EXPORT_SYMBOL_GPL(devm_regmap_init_i2c);
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index edf88f20cbc..6299a50a596 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -10,13 +10,13 @@
* published by the Free Software Foundation.
*/
-#include <linux/export.h>
#include <linux/device.h>
-#include <linux/regmap.h>
-#include <linux/irq.h>
+#include <linux/export.h>
#include <linux/interrupt.h>
+#include <linux/irq.h>
#include <linux/irqdomain.h>
#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
#include <linux/slab.h>
#include "internal.h"
@@ -347,6 +347,9 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
int ret = -ENOMEM;
u32 reg;
+ if (chip->num_regs <= 0)
+ return -EINVAL;
+
for (i = 0; i < chip->num_irqs; i++) {
if (chip->irqs[i].reg_offset % map->reg_stride)
return -EINVAL;
diff --git a/drivers/base/regmap/regmap-mmio.c b/drivers/base/regmap/regmap-mmio.c
index 1e03e7f8bac..04a329a377e 100644
--- a/drivers/base/regmap/regmap-mmio.c
+++ b/drivers/base/regmap/regmap-mmio.c
@@ -61,9 +61,28 @@ static int regmap_mmio_regbits_check(size_t reg_bits)
}
}
-static inline void regmap_mmio_count_check(size_t count)
+static inline void regmap_mmio_count_check(size_t count, u32 offset)
{
- BUG_ON(count % 2 != 0);
+ BUG_ON(count <= offset);
+}
+
+static inline unsigned int
+regmap_mmio_get_offset(const void *reg, size_t reg_size)
+{
+ switch (reg_size) {
+ case 1:
+ return *(u8 *)reg;
+ case 2:
+ return *(u16 *)reg;
+ case 4:
+ return *(u32 *)reg;
+#ifdef CONFIG_64BIT
+ case 8:
+ return *(u64 *)reg;
+#endif
+ default:
+ BUG();
+ }
}
static int regmap_mmio_gather_write(void *context,
@@ -71,7 +90,7 @@ static int regmap_mmio_gather_write(void *context,
const void *val, size_t val_size)
{
struct regmap_mmio_context *ctx = context;
- u32 offset;
+ unsigned int offset;
int ret;
regmap_mmio_regsize_check(reg_size);
@@ -82,7 +101,7 @@ static int regmap_mmio_gather_write(void *context,
return ret;
}
- offset = *(u32 *)reg;
+ offset = regmap_mmio_get_offset(reg, reg_size);
while (val_size) {
switch (ctx->val_bytes) {
@@ -118,9 +137,9 @@ static int regmap_mmio_gather_write(void *context,
static int regmap_mmio_write(void *context, const void *data, size_t count)
{
struct regmap_mmio_context *ctx = context;
- u32 offset = ctx->reg_bytes + ctx->pad_bytes;
+ unsigned int offset = ctx->reg_bytes + ctx->pad_bytes;
- regmap_mmio_count_check(count);
+ regmap_mmio_count_check(count, offset);
return regmap_mmio_gather_write(context, data, ctx->reg_bytes,
data + offset, count - offset);
@@ -131,7 +150,7 @@ static int regmap_mmio_read(void *context,
void *val, size_t val_size)
{
struct regmap_mmio_context *ctx = context;
- u32 offset;
+ unsigned int offset;
int ret;
regmap_mmio_regsize_check(reg_size);
@@ -142,7 +161,7 @@ static int regmap_mmio_read(void *context,
return ret;
}
- offset = *(u32 *)reg;
+ offset = regmap_mmio_get_offset(reg, reg_size);
while (val_size) {
switch (ctx->val_bytes) {
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 63e30ef096e..74d8c0672cf 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -35,10 +35,14 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val,
bool *change);
+static int _regmap_bus_reg_read(void *context, unsigned int reg,
+ unsigned int *val);
static int _regmap_bus_read(void *context, unsigned int reg,
unsigned int *val);
static int _regmap_bus_formatted_write(void *context, unsigned int reg,
unsigned int val);
+static int _regmap_bus_reg_write(void *context, unsigned int reg,
+ unsigned int val);
static int _regmap_bus_raw_write(void *context, unsigned int reg,
unsigned int val);
@@ -192,6 +196,13 @@ static void regmap_format_16_be(void *buf, unsigned int val, unsigned int shift)
b[0] = cpu_to_be16(val << shift);
}
+static void regmap_format_16_le(void *buf, unsigned int val, unsigned int shift)
+{
+ __le16 *b = buf;
+
+ b[0] = cpu_to_le16(val << shift);
+}
+
static void regmap_format_16_native(void *buf, unsigned int val,
unsigned int shift)
{
@@ -216,6 +227,13 @@ static void regmap_format_32_be(void *buf, unsigned int val, unsigned int shift)
b[0] = cpu_to_be32(val << shift);
}
+static void regmap_format_32_le(void *buf, unsigned int val, unsigned int shift)
+{
+ __le32 *b = buf;
+
+ b[0] = cpu_to_le32(val << shift);
+}
+
static void regmap_format_32_native(void *buf, unsigned int val,
unsigned int shift)
{
@@ -240,6 +258,13 @@ static unsigned int regmap_parse_16_be(const void *buf)
return be16_to_cpu(b[0]);
}
+static unsigned int regmap_parse_16_le(const void *buf)
+{
+ const __le16 *b = buf;
+
+ return le16_to_cpu(b[0]);
+}
+
static void regmap_parse_16_be_inplace(void *buf)
{
__be16 *b = buf;
@@ -247,6 +272,13 @@ static void regmap_parse_16_be_inplace(void *buf)
b[0] = be16_to_cpu(b[0]);
}
+static void regmap_parse_16_le_inplace(void *buf)
+{
+ __le16 *b = buf;
+
+ b[0] = le16_to_cpu(b[0]);
+}
+
static unsigned int regmap_parse_16_native(const void *buf)
{
return *(u16 *)buf;
@@ -269,6 +301,13 @@ static unsigned int regmap_parse_32_be(const void *buf)
return be32_to_cpu(b[0]);
}
+static unsigned int regmap_parse_32_le(const void *buf)
+{
+ const __le32 *b = buf;
+
+ return le32_to_cpu(b[0]);
+}
+
static void regmap_parse_32_be_inplace(void *buf)
{
__be32 *b = buf;
@@ -276,6 +315,13 @@ static void regmap_parse_32_be_inplace(void *buf)
b[0] = be32_to_cpu(b[0]);
}
+static void regmap_parse_32_le_inplace(void *buf)
+{
+ __le32 *b = buf;
+
+ b[0] = le32_to_cpu(b[0]);
+}
+
static unsigned int regmap_parse_32_native(const void *buf)
{
return *(u32 *)buf;
@@ -495,6 +541,12 @@ struct regmap *regmap_init(struct device *dev,
map->defer_caching = false;
goto skip_format_initialization;
+ } else if (!bus->read || !bus->write) {
+ map->reg_read = _regmap_bus_reg_read;
+ map->reg_write = _regmap_bus_reg_write;
+
+ map->defer_caching = false;
+ goto skip_format_initialization;
} else {
map->reg_read = _regmap_bus_read;
}
@@ -608,6 +660,11 @@ struct regmap *regmap_init(struct device *dev,
map->format.parse_val = regmap_parse_16_be;
map->format.parse_inplace = regmap_parse_16_be_inplace;
break;
+ case REGMAP_ENDIAN_LITTLE:
+ map->format.format_val = regmap_format_16_le;
+ map->format.parse_val = regmap_parse_16_le;
+ map->format.parse_inplace = regmap_parse_16_le_inplace;
+ break;
case REGMAP_ENDIAN_NATIVE:
map->format.format_val = regmap_format_16_native;
map->format.parse_val = regmap_parse_16_native;
@@ -629,6 +686,11 @@ struct regmap *regmap_init(struct device *dev,
map->format.parse_val = regmap_parse_32_be;
map->format.parse_inplace = regmap_parse_32_be_inplace;
break;
+ case REGMAP_ENDIAN_LITTLE:
+ map->format.format_val = regmap_format_32_le;
+ map->format.parse_val = regmap_parse_32_le;
+ map->format.parse_inplace = regmap_parse_32_le_inplace;
+ break;
case REGMAP_ENDIAN_NATIVE:
map->format.format_val = regmap_format_32_native;
map->format.parse_val = regmap_parse_32_native;
@@ -1284,6 +1346,14 @@ static int _regmap_bus_formatted_write(void *context, unsigned int reg,
return ret;
}
+static int _regmap_bus_reg_write(void *context, unsigned int reg,
+ unsigned int val)
+{
+ struct regmap *map = context;
+
+ return map->bus->reg_write(map->bus_context, reg, val);
+}
+
static int _regmap_bus_raw_write(void *context, unsigned int reg,
unsigned int val)
{
@@ -1615,6 +1685,9 @@ static int _regmap_raw_multi_reg_write(struct regmap *map,
size_t pair_size = reg_bytes + pad_bytes + val_bytes;
size_t len = pair_size * num_regs;
+ if (!len)
+ return -EINVAL;
+
buf = kzalloc(len, GFP_KERNEL);
if (!buf)
return -ENOMEM;
@@ -1662,7 +1735,7 @@ static int _regmap_range_multi_paged_reg_write(struct regmap *map,
int ret;
int i, n;
struct reg_default *base;
- unsigned int this_page;
+ unsigned int this_page = 0;
/*
* the set of registers are not neccessarily in order, but
* since the order of write must be preserved this algorithm
@@ -1925,6 +1998,14 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
return ret;
}
+static int _regmap_bus_reg_read(void *context, unsigned int reg,
+ unsigned int *val)
+{
+ struct regmap *map = context;
+
+ return map->bus->reg_read(map->bus_context, reg, val);
+}
+
static int _regmap_bus_read(void *context, unsigned int reg,
unsigned int *val)
{
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-16 00:59:16 +0000