Merge branches 'regmap-core', 'regmap-mmio' and 'regmap-naming' into regmap-stride
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index 0f6c7fb..9ef0a53 100644
--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -14,5 +14,8 @@
config REGMAP_SPI
tristate
+config REGMAP_MMIO
+ tristate
+
config REGMAP_IRQ
bool
diff --git a/drivers/base/regmap/Makefile b/drivers/base/regmap/Makefile
index defd579..5e75d1b 100644
--- a/drivers/base/regmap/Makefile
+++ b/drivers/base/regmap/Makefile
@@ -3,4 +3,5 @@
obj-$(CONFIG_DEBUG_FS) += regmap-debugfs.o
obj-$(CONFIG_REGMAP_I2C) += regmap-i2c.o
obj-$(CONFIG_REGMAP_SPI) += regmap-spi.o
+obj-$(CONFIG_REGMAP_MMIO) += regmap-mmio.o
obj-$(CONFIG_REGMAP_IRQ) += regmap-irq.o
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index fcafc5b..99b28ff 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -26,21 +26,29 @@
size_t val_bytes;
void (*format_write)(struct regmap *map,
unsigned int reg, unsigned int val);
- void (*format_reg)(void *buf, unsigned int reg);
- void (*format_val)(void *buf, unsigned int val);
+ void (*format_reg)(void *buf, unsigned int reg, unsigned int shift);
+ void (*format_val)(void *buf, unsigned int val, unsigned int shift);
unsigned int (*parse_val)(void *buf);
};
+typedef void (*regmap_lock)(struct regmap *map);
+typedef void (*regmap_unlock)(struct regmap *map);
+
struct regmap {
- struct mutex lock;
+ struct mutex mutex;
+ spinlock_t spinlock;
+ regmap_lock lock;
+ regmap_unlock unlock;
struct device *dev; /* Device we do I/O on */
void *work_buf; /* Scratch buffer used to format I/O */
struct regmap_format format; /* Buffer format */
const struct regmap_bus *bus;
+ void *bus_context;
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs;
+ const char *debugfs_name;
#endif
unsigned int max_register;
@@ -52,6 +60,9 @@
u8 read_flag_mask;
u8 write_flag_mask;
+ /* number of bits to (left) shift the reg value when formatting*/
+ int reg_shift;
+
/* regcache specific members */
const struct regcache_ops *cache_ops;
enum regcache_type cache_type;
@@ -101,11 +112,11 @@
#ifdef CONFIG_DEBUG_FS
extern void regmap_debugfs_initcall(void);
-extern void regmap_debugfs_init(struct regmap *map);
+extern void regmap_debugfs_init(struct regmap *map, const char *name);
extern void regmap_debugfs_exit(struct regmap *map);
#else
static inline void regmap_debugfs_initcall(void) { }
-static inline void regmap_debugfs_init(struct regmap *map) { }
+static inline void regmap_debugfs_init(struct regmap *map, const char *name) { }
static inline void regmap_debugfs_exit(struct regmap *map) { }
#endif
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 92b779e..e49e71f 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -140,7 +140,7 @@
int registers = 0;
int average;
- mutex_lock(&map->lock);
+ map->lock(map);
for (node = rb_first(&rbtree_ctx->root); node != NULL;
node = rb_next(node)) {
@@ -161,7 +161,7 @@
seq_printf(s, "%d nodes, %d registers, average %d registers\n",
nodes, registers, average);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return 0;
}
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 74b6909..d4368e8 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -264,7 +264,7 @@
BUG_ON(!map->cache_ops || !map->cache_ops->sync);
- mutex_lock(&map->lock);
+ map->lock(map);
/* Remember the initial bypass state */
bypass = map->cache_bypass;
dev_dbg(map->dev, "Syncing %s cache\n",
@@ -296,7 +296,7 @@
trace_regcache_sync(map->dev, name, "stop");
/* Restore the bypass state */
map->cache_bypass = bypass;
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -323,7 +323,7 @@
BUG_ON(!map->cache_ops || !map->cache_ops->sync);
- mutex_lock(&map->lock);
+ map->lock(map);
/* Remember the initial bypass state */
bypass = map->cache_bypass;
@@ -342,7 +342,7 @@
trace_regcache_sync(map->dev, name, "stop region");
/* Restore the bypass state */
map->cache_bypass = bypass;
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -362,11 +362,11 @@
*/
void regcache_cache_only(struct regmap *map, bool enable)
{
- mutex_lock(&map->lock);
+ map->lock(map);
WARN_ON(map->cache_bypass && enable);
map->cache_only = enable;
trace_regmap_cache_only(map->dev, enable);
- mutex_unlock(&map->lock);
+ map->unlock(map);
}
EXPORT_SYMBOL_GPL(regcache_cache_only);
@@ -381,9 +381,9 @@
*/
void regcache_mark_dirty(struct regmap *map)
{
- mutex_lock(&map->lock);
+ map->lock(map);
map->cache_dirty = true;
- mutex_unlock(&map->lock);
+ map->unlock(map);
}
EXPORT_SYMBOL_GPL(regcache_mark_dirty);
@@ -400,11 +400,11 @@
*/
void regcache_cache_bypass(struct regmap *map, bool enable)
{
- mutex_lock(&map->lock);
+ map->lock(map);
WARN_ON(map->cache_only && enable);
map->cache_bypass = enable;
trace_regmap_cache_bypass(map->dev, enable);
- mutex_unlock(&map->lock);
+ map->unlock(map);
}
EXPORT_SYMBOL_GPL(regcache_cache_bypass);
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index 251eb70..df97c93 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -242,10 +242,17 @@
.llseek = default_llseek,
};
-void regmap_debugfs_init(struct regmap *map)
+void regmap_debugfs_init(struct regmap *map, const char *name)
{
- map->debugfs = debugfs_create_dir(dev_name(map->dev),
- regmap_debugfs_root);
+ if (name) {
+ map->debugfs_name = kasprintf(GFP_KERNEL, "%s-%s",
+ dev_name(map->dev), name);
+ name = map->debugfs_name;
+ } else {
+ name = dev_name(map->dev);
+ }
+
+ map->debugfs = debugfs_create_dir(name, regmap_debugfs_root);
if (!map->debugfs) {
dev_warn(map->dev, "Failed to create debugfs directory\n");
return;
@@ -274,6 +281,7 @@
void regmap_debugfs_exit(struct regmap *map)
{
debugfs_remove_recursive(map->debugfs);
+ kfree(map->debugfs_name);
}
void regmap_debugfs_initcall(void)
diff --git a/drivers/base/regmap/regmap-i2c.c b/drivers/base/regmap/regmap-i2c.c
index 9a3a8c5..5f6b247 100644
--- a/drivers/base/regmap/regmap-i2c.c
+++ b/drivers/base/regmap/regmap-i2c.c
@@ -15,8 +15,9 @@
#include <linux/module.h>
#include <linux/init.h>
-static int regmap_i2c_write(struct device *dev, const void *data, size_t count)
+static int regmap_i2c_write(void *context, const void *data, size_t count)
{
+ struct device *dev = context;
struct i2c_client *i2c = to_i2c_client(dev);
int ret;
@@ -29,10 +30,11 @@
return -EIO;
}
-static int regmap_i2c_gather_write(struct device *dev,
+static int regmap_i2c_gather_write(void *context,
const void *reg, size_t reg_size,
const void *val, size_t val_size)
{
+ struct device *dev = context;
struct i2c_client *i2c = to_i2c_client(dev);
struct i2c_msg xfer[2];
int ret;
@@ -62,10 +64,11 @@
return -EIO;
}
-static int regmap_i2c_read(struct device *dev,
+static int regmap_i2c_read(void *context,
const void *reg, size_t reg_size,
void *val, size_t val_size)
{
+ struct device *dev = context;
struct i2c_client *i2c = to_i2c_client(dev);
struct i2c_msg xfer[2];
int ret;
@@ -107,7 +110,7 @@
struct regmap *regmap_init_i2c(struct i2c_client *i2c,
const struct regmap_config *config)
{
- return regmap_init(&i2c->dev, ®map_i2c, config);
+ return regmap_init(&i2c->dev, ®map_i2c, &i2c->dev, config);
}
EXPORT_SYMBOL_GPL(regmap_init_i2c);
@@ -124,7 +127,7 @@
struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,
const struct regmap_config *config)
{
- return devm_regmap_init(&i2c->dev, ®map_i2c, config);
+ return devm_regmap_init(&i2c->dev, ®map_i2c, &i2c->dev, config);
}
EXPORT_SYMBOL_GPL(devm_regmap_init_i2c);
diff --git a/drivers/base/regmap/regmap-mmio.c b/drivers/base/regmap/regmap-mmio.c
new file mode 100644
index 0000000..bdf4dc8
--- /dev/null
+++ b/drivers/base/regmap/regmap-mmio.c
@@ -0,0 +1,211 @@
+/*
+ * Register map access API - MMIO support
+ *
+ * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+struct regmap_mmio_context {
+ void __iomem *regs;
+ unsigned val_bytes;
+};
+
+static int regmap_mmio_gather_write(void *context,
+ const void *reg, size_t reg_size,
+ const void *val, size_t val_size)
+{
+ struct regmap_mmio_context *ctx = context;
+ u32 offset;
+
+ BUG_ON(reg_size != 4);
+
+ offset = be32_to_cpup(reg);
+
+ while (val_size) {
+ switch (ctx->val_bytes) {
+ case 1:
+ writeb(*(u8 *)val, ctx->regs + offset);
+ break;
+ case 2:
+ writew(be16_to_cpup(val), ctx->regs + offset);
+ break;
+ case 4:
+ writel(be32_to_cpup(val), ctx->regs + offset);
+ break;
+#ifdef CONFIG_64BIT
+ case 8:
+ writeq(be64_to_cpup(val), ctx->regs + offset);
+ break;
+#endif
+ default:
+ /* Should be caught by regmap_mmio_check_config */
+ BUG();
+ }
+ val_size -= ctx->val_bytes;
+ val += ctx->val_bytes;
+ offset += ctx->val_bytes;
+ }
+
+ return 0;
+}
+
+static int regmap_mmio_write(void *context, const void *data, size_t count)
+{
+ BUG_ON(count < 4);
+
+ return regmap_mmio_gather_write(context, data, 4, data + 4, count - 4);
+}
+
+static int regmap_mmio_read(void *context,
+ const void *reg, size_t reg_size,
+ void *val, size_t val_size)
+{
+ struct regmap_mmio_context *ctx = context;
+ u32 offset;
+
+ BUG_ON(reg_size != 4);
+
+ offset = be32_to_cpup(reg);
+
+ while (val_size) {
+ switch (ctx->val_bytes) {
+ case 1:
+ *(u8 *)val = readb(ctx->regs + offset);
+ break;
+ case 2:
+ *(u16 *)val = cpu_to_be16(readw(ctx->regs + offset));
+ break;
+ case 4:
+ *(u32 *)val = cpu_to_be32(readl(ctx->regs + offset));
+ break;
+#ifdef CONFIG_64BIT
+ case 8:
+ *(u64 *)val = cpu_to_be32(readq(ctx->regs + offset));
+ break;
+#endif
+ default:
+ /* Should be caught by regmap_mmio_check_config */
+ BUG();
+ }
+ val_size -= ctx->val_bytes;
+ val += ctx->val_bytes;
+ offset += ctx->val_bytes;
+ }
+
+ return 0;
+}
+
+static void regmap_mmio_free_context(void *context)
+{
+ kfree(context);
+}
+
+static struct regmap_bus regmap_mmio = {
+ .fast_io = true,
+ .write = regmap_mmio_write,
+ .gather_write = regmap_mmio_gather_write,
+ .read = regmap_mmio_read,
+ .free_context = regmap_mmio_free_context,
+};
+
+struct regmap_mmio_context *regmap_mmio_gen_context(void __iomem *regs,
+ const struct regmap_config *config)
+{
+ struct regmap_mmio_context *ctx;
+
+ if (config->reg_bits != 32)
+ return ERR_PTR(-EINVAL);
+
+ if (config->pad_bits)
+ return ERR_PTR(-EINVAL);
+
+ switch (config->val_bits) {
+ case 8:
+ case 16:
+ case 32:
+#ifdef CONFIG_64BIT
+ case 64:
+#endif
+ break;
+ default:
+ return ERR_PTR(-EINVAL);
+ }
+
+ ctx = kzalloc(GFP_KERNEL, sizeof(*ctx));
+ if (!ctx)
+ return ERR_PTR(-ENOMEM);
+
+ ctx->regs = regs;
+ ctx->val_bytes = config->val_bits / 8;
+
+ return ctx;
+}
+
+/**
+ * regmap_init_mmio(): Initialise register map
+ *
+ * @dev: Device that will be interacted with
+ * @regs: Pointer to memory-mapped IO region
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer to
+ * a struct regmap.
+ */
+struct regmap *regmap_init_mmio(struct device *dev,
+ void __iomem *regs,
+ const struct regmap_config *config)
+{
+ struct regmap_mmio_context *ctx;
+
+ ctx = regmap_mmio_gen_context(regs, config);
+ if (IS_ERR(ctx))
+ return ERR_CAST(ctx);
+
+ return regmap_init(dev, ®map_mmio, ctx, config);
+}
+EXPORT_SYMBOL_GPL(regmap_init_mmio);
+
+/**
+ * devm_regmap_init_mmio(): Initialise managed register map
+ *
+ * @dev: Device that will be interacted with
+ * @regs: Pointer to memory-mapped IO region
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer
+ * to a struct regmap. The regmap will be automatically freed by the
+ * device management code.
+ */
+struct regmap *devm_regmap_init_mmio(struct device *dev,
+ void __iomem *regs,
+ const struct regmap_config *config)
+{
+ struct regmap_mmio_context *ctx;
+
+ ctx = regmap_mmio_gen_context(regs, config);
+ if (IS_ERR(ctx))
+ return ERR_CAST(ctx);
+
+ return devm_regmap_init(dev, ®map_mmio, ctx, config);
+}
+EXPORT_SYMBOL_GPL(devm_regmap_init_mmio);
+
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/base/regmap/regmap-spi.c b/drivers/base/regmap/regmap-spi.c
index 7c0c35a..ffa46a9 100644
--- a/drivers/base/regmap/regmap-spi.c
+++ b/drivers/base/regmap/regmap-spi.c
@@ -15,17 +15,19 @@
#include <linux/init.h>
#include <linux/module.h>
-static int regmap_spi_write(struct device *dev, const void *data, size_t count)
+static int regmap_spi_write(void *context, const void *data, size_t count)
{
+ struct device *dev = context;
struct spi_device *spi = to_spi_device(dev);
return spi_write(spi, data, count);
}
-static int regmap_spi_gather_write(struct device *dev,
+static int regmap_spi_gather_write(void *context,
const void *reg, size_t reg_len,
const void *val, size_t val_len)
{
+ struct device *dev = context;
struct spi_device *spi = to_spi_device(dev);
struct spi_message m;
struct spi_transfer t[2] = { { .tx_buf = reg, .len = reg_len, },
@@ -38,10 +40,11 @@
return spi_sync(spi, &m);
}
-static int regmap_spi_read(struct device *dev,
+static int regmap_spi_read(void *context,
const void *reg, size_t reg_size,
void *val, size_t val_size)
{
+ struct device *dev = context;
struct spi_device *spi = to_spi_device(dev);
return spi_write_then_read(spi, reg, reg_size, val, val_size);
@@ -66,7 +69,7 @@
struct regmap *regmap_init_spi(struct spi_device *spi,
const struct regmap_config *config)
{
- return regmap_init(&spi->dev, ®map_spi, config);
+ return regmap_init(&spi->dev, ®map_spi, &spi->dev, config);
}
EXPORT_SYMBOL_GPL(regmap_init_spi);
@@ -83,7 +86,7 @@
struct regmap *devm_regmap_init_spi(struct spi_device *spi,
const struct regmap_config *config)
{
- return devm_regmap_init(&spi->dev, ®map_spi, config);
+ return devm_regmap_init(&spi->dev, ®map_spi, &spi->dev, config);
}
EXPORT_SYMBOL_GPL(devm_regmap_init_spi);
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 7a3f535..40f9101 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -112,25 +112,36 @@
out[0] = reg >> 2;
}
-static void regmap_format_8(void *buf, unsigned int val)
+static void regmap_format_8(void *buf, unsigned int val, unsigned int shift)
{
u8 *b = buf;
- b[0] = val;
+ b[0] = val << shift;
}
-static void regmap_format_16(void *buf, unsigned int val)
+static void regmap_format_16(void *buf, unsigned int val, unsigned int shift)
{
__be16 *b = buf;
- b[0] = cpu_to_be16(val);
+ b[0] = cpu_to_be16(val << shift);
}
-static void regmap_format_32(void *buf, unsigned int val)
+static void regmap_format_24(void *buf, unsigned int val, unsigned int shift)
+{
+ u8 *b = buf;
+
+ val <<= shift;
+
+ b[0] = val >> 16;
+ b[1] = val >> 8;
+ b[2] = val;
+}
+
+static void regmap_format_32(void *buf, unsigned int val, unsigned int shift)
{
__be32 *b = buf;
- b[0] = cpu_to_be32(val);
+ b[0] = cpu_to_be32(val << shift);
}
static unsigned int regmap_parse_8(void *buf)
@@ -149,6 +160,16 @@
return b[0];
}
+static unsigned int regmap_parse_24(void *buf)
+{
+ u8 *b = buf;
+ unsigned int ret = b[2];
+ ret |= ((unsigned int)b[1]) << 8;
+ ret |= ((unsigned int)b[0]) << 16;
+
+ return ret;
+}
+
static unsigned int regmap_parse_32(void *buf)
{
__be32 *b = buf;
@@ -158,11 +179,32 @@
return b[0];
}
+static void regmap_lock_mutex(struct regmap *map)
+{
+ mutex_lock(&map->mutex);
+}
+
+static void regmap_unlock_mutex(struct regmap *map)
+{
+ mutex_unlock(&map->mutex);
+}
+
+static void regmap_lock_spinlock(struct regmap *map)
+{
+ spin_lock(&map->spinlock);
+}
+
+static void regmap_unlock_spinlock(struct regmap *map)
+{
+ spin_unlock(&map->spinlock);
+}
+
/**
* regmap_init(): Initialise register map
*
* @dev: Device that will be interacted with
* @bus: Bus-specific callbacks to use with device
+ * @bus_context: Data passed to bus-specific callbacks
* @config: Configuration for register map
*
* The return value will be an ERR_PTR() on error or a valid pointer to
@@ -171,6 +213,7 @@
*/
struct regmap *regmap_init(struct device *dev,
const struct regmap_bus *bus,
+ void *bus_context,
const struct regmap_config *config)
{
struct regmap *map;
@@ -185,14 +228,24 @@
goto err;
}
- mutex_init(&map->lock);
+ if (bus->fast_io) {
+ spin_lock_init(&map->spinlock);
+ map->lock = regmap_lock_spinlock;
+ map->unlock = regmap_unlock_spinlock;
+ } else {
+ mutex_init(&map->mutex);
+ map->lock = regmap_lock_mutex;
+ map->unlock = regmap_unlock_mutex;
+ }
map->format.buf_size = (config->reg_bits + config->val_bits) / 8;
map->format.reg_bytes = DIV_ROUND_UP(config->reg_bits, 8);
map->format.pad_bytes = config->pad_bits / 8;
map->format.val_bytes = DIV_ROUND_UP(config->val_bits, 8);
map->format.buf_size += map->format.pad_bytes;
+ map->reg_shift = config->pad_bits % 8;
map->dev = dev;
map->bus = bus;
+ map->bus_context = bus_context;
map->max_register = config->max_register;
map->writeable_reg = config->writeable_reg;
map->readable_reg = config->readable_reg;
@@ -207,7 +260,7 @@
map->read_flag_mask = bus->read_flag_mask;
}
- switch (config->reg_bits) {
+ switch (config->reg_bits + map->reg_shift) {
case 2:
switch (config->val_bits) {
case 6:
@@ -273,6 +326,10 @@
map->format.format_val = regmap_format_16;
map->format.parse_val = regmap_parse_16;
break;
+ case 24:
+ map->format.format_val = regmap_format_24;
+ map->format.parse_val = regmap_parse_24;
+ break;
case 32:
map->format.format_val = regmap_format_32;
map->format.parse_val = regmap_parse_32;
@@ -289,7 +346,7 @@
goto err_map;
}
- regmap_debugfs_init(map);
+ regmap_debugfs_init(map, config->name);
ret = regcache_init(map, config);
if (ret < 0)
@@ -316,6 +373,7 @@
*
* @dev: Device that will be interacted with
* @bus: Bus-specific callbacks to use with device
+ * @bus_context: Data passed to bus-specific callbacks
* @config: Configuration for register map
*
* The return value will be an ERR_PTR() on error or a valid pointer
@@ -325,6 +383,7 @@
*/
struct regmap *devm_regmap_init(struct device *dev,
const struct regmap_bus *bus,
+ void *bus_context,
const struct regmap_config *config)
{
struct regmap **ptr, *regmap;
@@ -333,7 +392,7 @@
if (!ptr)
return ERR_PTR(-ENOMEM);
- regmap = regmap_init(dev, bus, config);
+ regmap = regmap_init(dev, bus, bus_context, config);
if (!IS_ERR(regmap)) {
*ptr = regmap;
devres_add(dev, ptr);
@@ -360,7 +419,7 @@
{
int ret;
- mutex_lock(&map->lock);
+ map->lock(map);
regcache_exit(map);
regmap_debugfs_exit(map);
@@ -372,14 +431,14 @@
map->precious_reg = config->precious_reg;
map->cache_type = config->cache_type;
- regmap_debugfs_init(map);
+ regmap_debugfs_init(map, config->name);
map->cache_bypass = false;
map->cache_only = false;
ret = regcache_init(map, config);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -391,6 +450,8 @@
{
regcache_exit(map);
regmap_debugfs_exit(map);
+ if (map->bus->free_context)
+ map->bus->free_context(map->bus_context);
kfree(map->work_buf);
kfree(map);
}
@@ -431,7 +492,7 @@
}
}
- map->format.format_reg(map->work_buf, reg);
+ map->format.format_reg(map->work_buf, reg, map->reg_shift);
u8[0] |= map->write_flag_mask;
@@ -444,12 +505,12 @@
*/
if (val == (map->work_buf + map->format.pad_bytes +
map->format.reg_bytes))
- ret = map->bus->write(map->dev, map->work_buf,
+ ret = map->bus->write(map->bus_context, map->work_buf,
map->format.reg_bytes +
map->format.pad_bytes +
val_len);
else if (map->bus->gather_write)
- ret = map->bus->gather_write(map->dev, map->work_buf,
+ ret = map->bus->gather_write(map->bus_context, map->work_buf,
map->format.reg_bytes +
map->format.pad_bytes,
val, val_len);
@@ -464,7 +525,7 @@
memcpy(buf, map->work_buf, map->format.reg_bytes);
memcpy(buf + map->format.reg_bytes + map->format.pad_bytes,
val, val_len);
- ret = map->bus->write(map->dev, buf, len);
+ ret = map->bus->write(map->bus_context, buf, len);
kfree(buf);
}
@@ -498,7 +559,7 @@
trace_regmap_hw_write_start(map->dev, reg, 1);
- ret = map->bus->write(map->dev, map->work_buf,
+ ret = map->bus->write(map->bus_context, map->work_buf,
map->format.buf_size);
trace_regmap_hw_write_done(map->dev, reg, 1);
@@ -506,7 +567,7 @@
return ret;
} else {
map->format.format_val(map->work_buf + map->format.reg_bytes
- + map->format.pad_bytes, val);
+ + map->format.pad_bytes, val, 0);
return _regmap_raw_write(map, reg,
map->work_buf +
map->format.reg_bytes +
@@ -529,11 +590,11 @@
{
int ret;
- mutex_lock(&map->lock);
+ map->lock(map);
ret = _regmap_write(map, reg, val);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -560,11 +621,14 @@
{
int ret;
- mutex_lock(&map->lock);
+ if (val_len % map->format.val_bytes)
+ return -EINVAL;
+
+ map->lock(map);
ret = _regmap_raw_write(map, reg, val, val_len);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -594,7 +658,7 @@
if (!map->format.parse_val)
return -EINVAL;
- mutex_lock(&map->lock);
+ map->lock(map);
/* No formatting is require if val_byte is 1 */
if (val_bytes == 1) {
@@ -615,7 +679,7 @@
kfree(wval);
out:
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
EXPORT_SYMBOL_GPL(regmap_bulk_write);
@@ -626,7 +690,7 @@
u8 *u8 = map->work_buf;
int ret;
- map->format.format_reg(map->work_buf, reg);
+ map->format.format_reg(map->work_buf, reg, map->reg_shift);
/*
* Some buses or devices flag reads by setting the high bits in the
@@ -639,7 +703,7 @@
trace_regmap_hw_read_start(map->dev, reg,
val_len / map->format.val_bytes);
- ret = map->bus->read(map->dev, map->work_buf,
+ ret = map->bus->read(map->bus_context, map->work_buf,
map->format.reg_bytes + map->format.pad_bytes,
val, val_len);
@@ -689,11 +753,11 @@
{
int ret;
- mutex_lock(&map->lock);
+ map->lock(map);
ret = _regmap_read(map, reg, val);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -718,7 +782,10 @@
unsigned int v;
int ret, i;
- mutex_lock(&map->lock);
+ if (val_len % map->format.val_bytes)
+ return -EINVAL;
+
+ map->lock(map);
if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||
map->cache_type == REGCACHE_NONE) {
@@ -734,12 +801,12 @@
if (ret != 0)
goto out;
- map->format.format_val(val + (i * val_bytes), v);
+ map->format.format_val(val + (i * val_bytes), v, 0);
}
}
out:
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -792,7 +859,7 @@
int ret;
unsigned int tmp, orig;
- mutex_lock(&map->lock);
+ map->lock(map);
ret = _regmap_read(map, reg, &orig);
if (ret != 0)
@@ -809,7 +876,7 @@
}
out:
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -876,7 +943,7 @@
if (map->patch)
return -EBUSY;
- mutex_lock(&map->lock);
+ map->lock(map);
bypass = map->cache_bypass;
@@ -904,7 +971,7 @@
out:
map->cache_bypass = bypass;
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index a90abb6..680ddd7 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -46,6 +46,9 @@
/**
* Configuration for the register map of a device.
*
+ * @name: Optional name of the regmap. Useful when a device has multiple
+ * register regions.
+ *
* @reg_bits: Number of bits in a register address, mandatory.
* @pad_bits: Number of bits of padding between register and value.
* @val_bits: Number of bits in a register value, mandatory.
@@ -77,6 +80,8 @@
* @num_reg_defaults_raw: Number of elements in reg_defaults_raw.
*/
struct regmap_config {
+ const char *name;
+
int reg_bits;
int pad_bits;
int val_bits;
@@ -97,18 +102,21 @@
u8 write_flag_mask;
};
-typedef int (*regmap_hw_write)(struct device *dev, const void *data,
+typedef int (*regmap_hw_write)(void *context, const void *data,
size_t count);
-typedef int (*regmap_hw_gather_write)(struct device *dev,
+typedef int (*regmap_hw_gather_write)(void *context,
const void *reg, size_t reg_len,
const void *val, size_t val_len);
-typedef int (*regmap_hw_read)(struct device *dev,
+typedef int (*regmap_hw_read)(void *context,
const void *reg_buf, size_t reg_size,
void *val_buf, size_t val_size);
+typedef void (*regmap_hw_free_context)(void *context);
/**
* Description of a hardware bus for the register map infrastructure.
*
+ * @fast_io: Register IO is fast. Use a spinlock instead of a mutex
+ * to perform locking.
* @write: Write operation.
* @gather_write: Write operation with split register/value, return -ENOTSUPP
* if not implemented on a given device.
@@ -118,27 +126,37 @@
* a read.
*/
struct regmap_bus {
+ bool fast_io;
regmap_hw_write write;
regmap_hw_gather_write gather_write;
regmap_hw_read read;
+ regmap_hw_free_context free_context;
u8 read_flag_mask;
};
struct regmap *regmap_init(struct device *dev,
const struct regmap_bus *bus,
+ void *bus_context,
const struct regmap_config *config);
struct regmap *regmap_init_i2c(struct i2c_client *i2c,
const struct regmap_config *config);
struct regmap *regmap_init_spi(struct spi_device *dev,
const struct regmap_config *config);
+struct regmap *regmap_init_mmio(struct device *dev,
+ void __iomem *regs,
+ const struct regmap_config *config);
struct regmap *devm_regmap_init(struct device *dev,
const struct regmap_bus *bus,
+ void *bus_context,
const struct regmap_config *config);
struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,
const struct regmap_config *config);
struct regmap *devm_regmap_init_spi(struct spi_device *dev,
const struct regmap_config *config);
+struct regmap *devm_regmap_init_mmio(struct device *dev,
+ void __iomem *regs,
+ const struct regmap_config *config);
void regmap_exit(struct regmap *map);
int regmap_reinit_cache(struct regmap *map,