Merge tag 'regmap-3.4' into regmap-stride
regmap: Last minute bug fix for 3.4
This is a last minute bug fix that was only just noticed since the code
path that's being exercised here is one that is fairly rarely used. The
changelog for the change itself is extremely clear and the code itself
is obvious to inspection so should be pretty safe.
Conflicts:
drivers/base/regmap/regmap.c (overlap between the fix and stride code)
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..2eb7197 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 +60,10 @@
u8 read_flag_mask;
u8 write_flag_mask;
+ /* number of bits to (left) shift the reg value when formatting*/
+ int reg_shift;
+ int reg_stride;
+
/* regcache specific members */
const struct regcache_ops *cache_ops;
enum regcache_type cache_type;
@@ -79,6 +91,9 @@
struct reg_default *patch;
int patch_regs;
+
+ /* if set, converts bulk rw to single rw */
+ bool use_single_rw;
};
struct regcache_ops {
@@ -101,11 +116,11 @@
#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-lzo.c b/drivers/base/regmap/regcache-lzo.c
index 483b06d..afd6aa9 100644
--- a/drivers/base/regmap/regcache-lzo.c
+++ b/drivers/base/regmap/regcache-lzo.c
@@ -108,7 +108,7 @@
static inline int regcache_lzo_get_blkindex(struct regmap *map,
unsigned int reg)
{
- return (reg * map->cache_word_size) /
+ return ((reg / map->reg_stride) * map->cache_word_size) /
DIV_ROUND_UP(map->cache_size_raw,
regcache_lzo_block_count(map));
}
@@ -116,9 +116,10 @@
static inline int regcache_lzo_get_blkpos(struct regmap *map,
unsigned int reg)
{
- return reg % (DIV_ROUND_UP(map->cache_size_raw,
- regcache_lzo_block_count(map)) /
- map->cache_word_size);
+ return (reg / map->reg_stride) %
+ (DIV_ROUND_UP(map->cache_size_raw,
+ regcache_lzo_block_count(map)) /
+ map->cache_word_size);
}
static inline int regcache_lzo_get_blksize(struct regmap *map)
@@ -322,7 +323,7 @@
}
/* set the bit so we know we have to sync this register */
- set_bit(reg, lzo_block->sync_bmp);
+ set_bit(reg / map->reg_stride, lzo_block->sync_bmp);
kfree(tmp_dst);
kfree(lzo_block->src);
return 0;
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 92b779e..e6732cf 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -39,11 +39,12 @@
};
static inline void regcache_rbtree_get_base_top_reg(
+ struct regmap *map,
struct regcache_rbtree_node *rbnode,
unsigned int *base, unsigned int *top)
{
*base = rbnode->base_reg;
- *top = rbnode->base_reg + rbnode->blklen - 1;
+ *top = rbnode->base_reg + ((rbnode->blklen - 1) * map->reg_stride);
}
static unsigned int regcache_rbtree_get_register(
@@ -70,7 +71,8 @@
rbnode = rbtree_ctx->cached_rbnode;
if (rbnode) {
- regcache_rbtree_get_base_top_reg(rbnode, &base_reg, &top_reg);
+ regcache_rbtree_get_base_top_reg(map, rbnode, &base_reg,
+ &top_reg);
if (reg >= base_reg && reg <= top_reg)
return rbnode;
}
@@ -78,7 +80,8 @@
node = rbtree_ctx->root.rb_node;
while (node) {
rbnode = container_of(node, struct regcache_rbtree_node, node);
- regcache_rbtree_get_base_top_reg(rbnode, &base_reg, &top_reg);
+ regcache_rbtree_get_base_top_reg(map, rbnode, &base_reg,
+ &top_reg);
if (reg >= base_reg && reg <= top_reg) {
rbtree_ctx->cached_rbnode = rbnode;
return rbnode;
@@ -92,7 +95,7 @@
return NULL;
}
-static int regcache_rbtree_insert(struct rb_root *root,
+static int regcache_rbtree_insert(struct regmap *map, struct rb_root *root,
struct regcache_rbtree_node *rbnode)
{
struct rb_node **new, *parent;
@@ -106,7 +109,7 @@
rbnode_tmp = container_of(*new, struct regcache_rbtree_node,
node);
/* base and top registers of the current rbnode */
- regcache_rbtree_get_base_top_reg(rbnode_tmp, &base_reg_tmp,
+ regcache_rbtree_get_base_top_reg(map, rbnode_tmp, &base_reg_tmp,
&top_reg_tmp);
/* base register of the rbnode to be added */
base_reg = rbnode->base_reg;
@@ -138,19 +141,20 @@
unsigned int base, top;
int nodes = 0;
int registers = 0;
- int average;
+ int this_registers, average;
- mutex_lock(&map->lock);
+ map->lock(map);
for (node = rb_first(&rbtree_ctx->root); node != NULL;
node = rb_next(node)) {
n = container_of(node, struct regcache_rbtree_node, node);
- regcache_rbtree_get_base_top_reg(n, &base, &top);
- seq_printf(s, "%x-%x (%d)\n", base, top, top - base + 1);
+ regcache_rbtree_get_base_top_reg(map, n, &base, &top);
+ this_registers = ((top - base) / map->reg_stride) + 1;
+ seq_printf(s, "%x-%x (%d)\n", base, top, this_registers);
nodes++;
- registers += top - base + 1;
+ registers += this_registers;
}
if (nodes)
@@ -161,7 +165,7 @@
seq_printf(s, "%d nodes, %d registers, average %d registers\n",
nodes, registers, average);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return 0;
}
@@ -255,7 +259,7 @@
rbnode = regcache_rbtree_lookup(map, reg);
if (rbnode) {
- reg_tmp = reg - rbnode->base_reg;
+ reg_tmp = (reg - rbnode->base_reg) / map->reg_stride;
*value = regcache_rbtree_get_register(rbnode, reg_tmp,
map->cache_word_size);
} else {
@@ -310,7 +314,7 @@
*/
rbnode = regcache_rbtree_lookup(map, reg);
if (rbnode) {
- reg_tmp = reg - rbnode->base_reg;
+ reg_tmp = (reg - rbnode->base_reg) / map->reg_stride;
val = regcache_rbtree_get_register(rbnode, reg_tmp,
map->cache_word_size);
if (val == value)
@@ -321,13 +325,15 @@
/* look for an adjacent register to the one we are about to add */
for (node = rb_first(&rbtree_ctx->root); node;
node = rb_next(node)) {
- rbnode_tmp = rb_entry(node, struct regcache_rbtree_node, node);
+ rbnode_tmp = rb_entry(node, struct regcache_rbtree_node,
+ node);
for (i = 0; i < rbnode_tmp->blklen; i++) {
- reg_tmp = rbnode_tmp->base_reg + i;
- if (abs(reg_tmp - reg) != 1)
+ reg_tmp = rbnode_tmp->base_reg +
+ (i * map->reg_stride);
+ if (abs(reg_tmp - reg) != map->reg_stride)
continue;
/* decide where in the block to place our register */
- if (reg_tmp + 1 == reg)
+ if (reg_tmp + map->reg_stride == reg)
pos = i + 1;
else
pos = i;
@@ -357,7 +363,7 @@
return -ENOMEM;
}
regcache_rbtree_set_register(rbnode, 0, value, map->cache_word_size);
- regcache_rbtree_insert(&rbtree_ctx->root, rbnode);
+ regcache_rbtree_insert(map, &rbtree_ctx->root, rbnode);
rbtree_ctx->cached_rbnode = rbnode;
}
@@ -397,7 +403,7 @@
end = rbnode->blklen;
for (i = base; i < end; i++) {
- regtmp = rbnode->base_reg + i;
+ regtmp = rbnode->base_reg + (i * map->reg_stride);
val = regcache_rbtree_get_register(rbnode, i,
map->cache_word_size);
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 74b6909..835883b 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -59,7 +59,7 @@
for (count = 0, i = 0; i < map->num_reg_defaults_raw; i++) {
val = regcache_get_val(map->reg_defaults_raw,
i, map->cache_word_size);
- if (regmap_volatile(map, i))
+ if (regmap_volatile(map, i * map->reg_stride))
continue;
count++;
}
@@ -76,9 +76,9 @@
for (i = 0, j = 0; i < map->num_reg_defaults_raw; i++) {
val = regcache_get_val(map->reg_defaults_raw,
i, map->cache_word_size);
- if (regmap_volatile(map, i))
+ if (regmap_volatile(map, i * map->reg_stride))
continue;
- map->reg_defaults[j].reg = i;
+ map->reg_defaults[j].reg = i * map->reg_stride;
map->reg_defaults[j].def = val;
j++;
}
@@ -98,6 +98,10 @@
int i;
void *tmp_buf;
+ for (i = 0; i < config->num_reg_defaults; i++)
+ if (config->reg_defaults[i].reg % map->reg_stride)
+ return -EINVAL;
+
if (map->cache_type == REGCACHE_NONE) {
map->cache_bypass = true;
return 0;
@@ -264,7 +268,7 @@
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",
@@ -278,6 +282,10 @@
/* Apply any patch first */
map->cache_bypass = 1;
for (i = 0; i < map->patch_regs; i++) {
+ if (map->patch[i].reg % map->reg_stride) {
+ ret = -EINVAL;
+ goto out;
+ }
ret = _regmap_write(map, map->patch[i].reg, map->patch[i].def);
if (ret != 0) {
dev_err(map->dev, "Failed to write %x = %x: %d\n",
@@ -296,7 +304,7 @@
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 +331,7 @@
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 +350,7 @@
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 +370,11 @@
*/
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 +389,9 @@
*/
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 +408,11 @@
*/
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..bb1ff17 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -80,7 +80,7 @@
val_len = 2 * map->format.val_bytes;
tot_len = reg_len + val_len + 3; /* : \n */
- for (i = 0; i < map->max_register + 1; i++) {
+ for (i = 0; i <= map->max_register; i += map->reg_stride) {
if (!regmap_readable(map, i))
continue;
@@ -197,7 +197,7 @@
reg_len = regmap_calc_reg_len(map->max_register, buf, count);
tot_len = reg_len + 10; /* ': R W V P\n' */
- for (i = 0; i < map->max_register + 1; i++) {
+ for (i = 0; i <= map->max_register; i += map->reg_stride) {
/* Ignore registers which are neither readable nor writable */
if (!regmap_readable(map, i) && !regmap_writeable(map, i))
continue;
@@ -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-irq.c b/drivers/base/regmap/regmap-irq.c
index 1befaa7..fc69d29 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -50,6 +50,7 @@
static void regmap_irq_sync_unlock(struct irq_data *data)
{
struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data);
+ struct regmap *map = d->map;
int i, ret;
/*
@@ -58,11 +59,12 @@
* suppress pointless writes.
*/
for (i = 0; i < d->chip->num_regs; i++) {
- ret = regmap_update_bits(d->map, d->chip->mask_base + i,
+ ret = regmap_update_bits(d->map, d->chip->mask_base +
+ (i * map->reg_stride),
d->mask_buf_def[i], d->mask_buf[i]);
if (ret != 0)
dev_err(d->map->dev, "Failed to sync masks in %x\n",
- d->chip->mask_base + i);
+ d->chip->mask_base + (i * map->reg_stride));
}
mutex_unlock(&d->lock);
@@ -71,17 +73,19 @@
static void regmap_irq_enable(struct irq_data *data)
{
struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data);
+ struct regmap *map = d->map;
const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->irq);
- d->mask_buf[irq_data->reg_offset] &= ~irq_data->mask;
+ d->mask_buf[irq_data->reg_offset / map->reg_stride] &= ~irq_data->mask;
}
static void regmap_irq_disable(struct irq_data *data)
{
struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data);
+ struct regmap *map = d->map;
const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->irq);
- d->mask_buf[irq_data->reg_offset] |= irq_data->mask;
+ d->mask_buf[irq_data->reg_offset / map->reg_stride] |= irq_data->mask;
}
static struct irq_chip regmap_irq_chip = {
@@ -136,17 +140,19 @@
data->status_buf[i] &= ~data->mask_buf[i];
if (data->status_buf[i] && chip->ack_base) {
- ret = regmap_write(map, chip->ack_base + i,
+ ret = regmap_write(map, chip->ack_base +
+ (i * map->reg_stride),
data->status_buf[i]);
if (ret != 0)
dev_err(map->dev, "Failed to ack 0x%x: %d\n",
- chip->ack_base + i, ret);
+ chip->ack_base + (i * map->reg_stride),
+ ret);
}
}
for (i = 0; i < chip->num_irqs; i++) {
- if (data->status_buf[chip->irqs[i].reg_offset] &
- chip->irqs[i].mask) {
+ if (data->status_buf[chip->irqs[i].reg_offset /
+ map->reg_stride] & chip->irqs[i].mask) {
handle_nested_irq(data->irq_base + i);
handled = true;
}
@@ -181,6 +187,14 @@
int cur_irq, i;
int ret = -ENOMEM;
+ for (i = 0; i < chip->num_irqs; i++) {
+ if (chip->irqs[i].reg_offset % map->reg_stride)
+ return -EINVAL;
+ if (chip->irqs[i].reg_offset / map->reg_stride >=
+ chip->num_regs)
+ return -EINVAL;
+ }
+
irq_base = irq_alloc_descs(irq_base, 0, chip->num_irqs, 0);
if (irq_base < 0) {
dev_warn(map->dev, "Failed to allocate IRQs: %d\n",
@@ -218,16 +232,17 @@
mutex_init(&d->lock);
for (i = 0; i < chip->num_irqs; i++)
- d->mask_buf_def[chip->irqs[i].reg_offset]
+ d->mask_buf_def[chip->irqs[i].reg_offset / map->reg_stride]
|= chip->irqs[i].mask;
/* Mask all the interrupts by default */
for (i = 0; i < chip->num_regs; i++) {
d->mask_buf[i] = d->mask_buf_def[i];
- ret = regmap_write(map, chip->mask_base + i, d->mask_buf[i]);
+ ret = regmap_write(map, chip->mask_base + (i * map->reg_stride),
+ d->mask_buf[i]);
if (ret != 0) {
dev_err(map->dev, "Failed to set masks in 0x%x: %d\n",
- chip->mask_base + i, ret);
+ chip->mask_base + (i * map->reg_stride), ret);
goto err_alloc;
}
}
diff --git a/drivers/base/regmap/regmap-mmio.c b/drivers/base/regmap/regmap-mmio.c
new file mode 100644
index 0000000..febd6de
--- /dev/null
+++ b/drivers/base/regmap/regmap-mmio.c
@@ -0,0 +1,224 @@
+/*
+ * 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;
+ int min_stride;
+
+ if (config->reg_bits != 32)
+ return ERR_PTR(-EINVAL);
+
+ if (config->pad_bits)
+ return ERR_PTR(-EINVAL);
+
+ switch (config->val_bits) {
+ case 8:
+ /* The core treats 0 as 1 */
+ min_stride = 0;
+ break;
+ case 16:
+ min_stride = 2;
+ break;
+ case 32:
+ min_stride = 4;
+ break;
+#ifdef CONFIG_64BIT
+ case 64:
+ min_stride = 8;
+ break;
+#endif
+ break;
+ default:
+ return ERR_PTR(-EINVAL);
+ }
+
+ if (config->reg_stride < min_stride)
+ 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 bb80853..3572949 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 +228,29 @@
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;
+ if (config->reg_stride)
+ map->reg_stride = config->reg_stride;
+ else
+ map->reg_stride = 1;
+ map->use_single_rw = config->use_single_rw;
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 +265,7 @@
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:
@@ -273,12 +331,19 @@
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;
break;
}
+ if (map->format.format_write)
+ map->use_single_rw = true;
+
if (!map->format.format_write &&
!(map->format.format_reg && map->format.format_val))
goto err_map;
@@ -289,7 +354,7 @@
goto err_map;
}
- regmap_debugfs_init(map);
+ regmap_debugfs_init(map, config->name);
ret = regcache_init(map, config);
if (ret < 0)
@@ -316,6 +381,7 @@
*
* @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 +391,7 @@
*/
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 +400,7 @@
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 +427,7 @@
{
int ret;
- mutex_lock(&map->lock);
+ map->lock(map);
regcache_exit(map);
regmap_debugfs_exit(map);
@@ -372,14 +439,14 @@
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 +458,8 @@
{
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);
}
@@ -408,7 +477,8 @@
/* Check for unwritable registers before we start */
if (map->writeable_reg)
for (i = 0; i < val_len / map->format.val_bytes; i++)
- if (!map->writeable_reg(map->dev, reg + i))
+ if (!map->writeable_reg(map->dev,
+ reg + (i * map->reg_stride)))
return -EINVAL;
if (!map->cache_bypass && map->format.parse_val) {
@@ -417,7 +487,8 @@
for (i = 0; i < val_len / val_bytes; i++) {
memcpy(map->work_buf, val + (i * val_bytes), val_bytes);
ival = map->format.parse_val(map->work_buf);
- ret = regcache_write(map, reg + i, ival);
+ ret = regcache_write(map, reg + (i * map->reg_stride),
+ ival);
if (ret) {
dev_err(map->dev,
"Error in caching of register: %u ret: %d\n",
@@ -431,7 +502,7 @@
}
}
- 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 +515,12 @@
*/
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 +535,7 @@
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 +569,7 @@
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 +577,7 @@
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 +600,14 @@
{
int ret;
- mutex_lock(&map->lock);
+ if (reg % map->reg_stride)
+ return -EINVAL;
+
+ map->lock(map);
ret = _regmap_write(map, reg, val);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -560,11 +634,16 @@
{
int ret;
- mutex_lock(&map->lock);
+ if (val_len % map->format.val_bytes)
+ return -EINVAL;
+ if (reg % map->reg_stride)
+ return -EINVAL;
+
+ map->lock(map);
ret = _regmap_raw_write(map, reg, val, val_len);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -593,8 +672,10 @@
if (!map->format.parse_val)
return -EINVAL;
+ if (reg % map->reg_stride)
+ return -EINVAL;
- mutex_lock(&map->lock);
+ map->lock(map);
/* No formatting is require if val_byte is 1 */
if (val_bytes == 1) {
@@ -609,13 +690,28 @@
for (i = 0; i < val_count * val_bytes; i += val_bytes)
map->format.parse_val(wval + i);
}
- ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count);
+ /*
+ * Some devices does not support bulk write, for
+ * them we have a series of single write operations.
+ */
+ if (map->use_single_rw) {
+ for (i = 0; i < val_count; i++) {
+ ret = regmap_raw_write(map,
+ reg + (i * map->reg_stride),
+ val + (i * val_bytes),
+ val_bytes);
+ if (ret != 0)
+ return ret;
+ }
+ } else {
+ ret = _regmap_raw_write(map, reg, wval, val_bytes * val_count);
+ }
if (val_bytes != 1)
kfree(wval);
out:
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
EXPORT_SYMBOL_GPL(regmap_bulk_write);
@@ -626,7 +722,7 @@
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 +735,7 @@
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 +785,14 @@
{
int ret;
- mutex_lock(&map->lock);
+ if (reg % map->reg_stride)
+ return -EINVAL;
+
+ map->lock(map);
ret = _regmap_read(map, reg, val);
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -718,7 +817,12 @@
unsigned int v;
int ret, i;
- mutex_lock(&map->lock);
+ if (val_len % map->format.val_bytes)
+ return -EINVAL;
+ if (reg % map->reg_stride)
+ return -EINVAL;
+
+ map->lock(map);
if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||
map->cache_type == REGCACHE_NONE) {
@@ -730,16 +834,17 @@
* cost as we expect to hit the cache.
*/
for (i = 0; i < val_count; i++) {
- ret = _regmap_read(map, reg + i, &v);
+ ret = _regmap_read(map, reg + (i * map->reg_stride),
+ &v);
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;
}
@@ -765,18 +870,37 @@
if (!map->format.parse_val)
return -EINVAL;
+ if (reg % map->reg_stride)
+ return -EINVAL;
if (vol || map->cache_type == REGCACHE_NONE) {
- ret = regmap_raw_read(map, reg, val, val_bytes * val_count);
- if (ret != 0)
- return ret;
+ /*
+ * Some devices does not support bulk read, for
+ * them we have a series of single read operations.
+ */
+ if (map->use_single_rw) {
+ for (i = 0; i < val_count; i++) {
+ ret = regmap_raw_read(map,
+ reg + (i * map->reg_stride),
+ val + (i * val_bytes),
+ val_bytes);
+ if (ret != 0)
+ return ret;
+ }
+ } else {
+ ret = regmap_raw_read(map, reg, val,
+ val_bytes * val_count);
+ if (ret != 0)
+ return ret;
+ }
for (i = 0; i < val_count * val_bytes; i += val_bytes)
map->format.parse_val(val + i);
} else {
for (i = 0; i < val_count; i++) {
unsigned int ival;
- ret = regmap_read(map, reg + i, &ival);
+ ret = regmap_read(map, reg + (i * map->reg_stride),
+ &ival);
if (ret != 0)
return ret;
memcpy(val + (i * val_bytes), &ival, val_bytes);
@@ -794,7 +918,7 @@
int ret;
unsigned int tmp, orig;
- mutex_lock(&map->lock);
+ map->lock(map);
ret = _regmap_read(map, reg, &orig);
if (ret != 0)
@@ -811,7 +935,7 @@
}
out:
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -878,7 +1002,7 @@
if (map->patch)
return -EBUSY;
- mutex_lock(&map->lock);
+ map->lock(map);
bypass = map->cache_bypass;
@@ -906,7 +1030,7 @@
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..ae797b1 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -46,7 +46,13 @@
/**
* 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.
+ * @reg_stride: The register address stride. Valid register addresses are a
+ * multiple of this value. If set to 0, a value of 1 will be
+ * used.
* @pad_bits: Number of bits of padding between register and value.
* @val_bits: Number of bits in a register value, mandatory.
*
@@ -70,6 +76,9 @@
* @write_flag_mask: Mask to be set in the top byte of the register when doing
* a write. If both read_flag_mask and write_flag_mask are
* empty the regmap_bus default masks are used.
+ * @use_single_rw: If set, converts the bulk read and write operations into
+ * a series of single read and write operations. This is useful
+ * for device that does not support bulk read and write.
*
* @cache_type: The actual cache type.
* @reg_defaults_raw: Power on reset values for registers (for use with
@@ -77,7 +86,10 @@
* @num_reg_defaults_raw: Number of elements in reg_defaults_raw.
*/
struct regmap_config {
+ const char *name;
+
int reg_bits;
+ int reg_stride;
int pad_bits;
int val_bits;
@@ -95,20 +107,25 @@
u8 read_flag_mask;
u8 write_flag_mask;
+
+ bool use_single_rw;
};
-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 +135,37 @@
* 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,