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-rw-r--r--drivers/base/bus.c3
-rw-r--r--drivers/base/core.c58
-rw-r--r--drivers/base/devres.c35
-rw-r--r--drivers/base/devtmpfs.c6
-rw-r--r--drivers/base/dma-buf.c12
-rw-r--r--drivers/base/driver.c2
-rw-r--r--drivers/base/regmap/Kconfig3
-rw-r--r--drivers/base/regmap/Makefile1
-rw-r--r--drivers/base/regmap/internal.h26
-rw-r--r--drivers/base/regmap/regcache-lzo.c11
-rw-r--r--drivers/base/regmap/regcache-rbtree.c44
-rw-r--r--drivers/base/regmap/regcache.c34
-rw-r--r--drivers/base/regmap/regmap-debugfs.c18
-rw-r--r--drivers/base/regmap/regmap-i2c.c13
-rw-r--r--drivers/base/regmap/regmap-irq.c184
-rw-r--r--drivers/base/regmap/regmap-mmio.c224
-rw-r--r--drivers/base/regmap/regmap-spi.c13
-rw-r--r--drivers/base/regmap/regmap.c278
18 files changed, 777 insertions, 188 deletions
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index 26a06b801b5b..2bcef657a60c 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -21,8 +21,7 @@
#include "power/power.h"
/* /sys/devices/system */
-/* FIXME: make static after drivers/base/sys.c is deleted */
-struct kset *system_kset;
+static struct kset *system_kset;
#define to_bus_attr(_attr) container_of(_attr, struct bus_attribute, attr)
diff --git a/drivers/base/core.c b/drivers/base/core.c
index e28ce9898af4..346be8b78b24 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -25,6 +25,7 @@
#include <linux/mutex.h>
#include <linux/async.h>
#include <linux/pm_runtime.h>
+#include <linux/netdevice.h>
#include "base.h"
#include "power/power.h"
@@ -65,7 +66,7 @@ static inline int device_is_not_partition(struct device *dev)
* @dev: struct device to get the name of
*
* Will return the device's driver's name if it is bound to a device. If
- * the device is not bound to a device, it will return the name of the bus
+ * the device is not bound to a driver, it will return the name of the bus
* it is attached to. If it is not attached to a bus either, an empty
* string will be returned.
*/
@@ -878,8 +879,8 @@ EXPORT_SYMBOL_GPL(dev_set_name);
* to NULL prevents an entry from being created. class->dev_kobj must
* be set (or cleared) before any devices are registered to the class
* otherwise device_create_sys_dev_entry() and
- * device_remove_sys_dev_entry() will disagree about the the presence
- * of the link.
+ * device_remove_sys_dev_entry() will disagree about the presence of
+ * the link.
*/
static struct kobject *device_to_dev_kobj(struct device *dev)
{
@@ -1843,15 +1844,60 @@ void device_shutdown(void)
*/
#ifdef CONFIG_PRINTK
-
int __dev_printk(const char *level, const struct device *dev,
struct va_format *vaf)
{
+ char dict[128];
+ size_t dictlen = 0;
+ const char *subsys;
+
if (!dev)
return printk("%s(NULL device *): %pV", level, vaf);
- return printk("%s%s %s: %pV",
- level, dev_driver_string(dev), dev_name(dev), vaf);
+ if (dev->class)
+ subsys = dev->class->name;
+ else if (dev->bus)
+ subsys = dev->bus->name;
+ else
+ goto skip;
+
+ dictlen += snprintf(dict + dictlen, sizeof(dict) - dictlen,
+ "SUBSYSTEM=%s", subsys);
+
+ /*
+ * Add device identifier DEVICE=:
+ * b12:8 block dev_t
+ * c127:3 char dev_t
+ * n8 netdev ifindex
+ * +sound:card0 subsystem:devname
+ */
+ if (MAJOR(dev->devt)) {
+ char c;
+
+ if (strcmp(subsys, "block") == 0)
+ c = 'b';
+ else
+ c = 'c';
+ dictlen++;
+ dictlen += snprintf(dict + dictlen, sizeof(dict) - dictlen,
+ "DEVICE=%c%u:%u",
+ c, MAJOR(dev->devt), MINOR(dev->devt));
+ } else if (strcmp(subsys, "net") == 0) {
+ struct net_device *net = to_net_dev(dev);
+
+ dictlen++;
+ dictlen += snprintf(dict + dictlen, sizeof(dict) - dictlen,
+ "DEVICE=n%u", net->ifindex);
+ } else {
+ dictlen++;
+ dictlen += snprintf(dict + dictlen, sizeof(dict) - dictlen,
+ "DEVICE=+%s:%s", subsys, dev_name(dev));
+ }
+skip:
+ return printk_emit(0, level[1] - '0',
+ dictlen ? dict : NULL, dictlen,
+ "%s %s: %pV",
+ dev_driver_string(dev), dev_name(dev), vaf);
}
EXPORT_SYMBOL(__dev_printk);
diff --git a/drivers/base/devres.c b/drivers/base/devres.c
index 524bf96c289f..2360adb7a58f 100644
--- a/drivers/base/devres.c
+++ b/drivers/base/devres.c
@@ -309,6 +309,10 @@ EXPORT_SYMBOL_GPL(devres_remove);
* which @match returns 1. If @match is NULL, it's considered to
* match all. If found, the resource is removed atomically and freed.
*
+ * Note that the release function for the resource will not be called,
+ * only the devres-allocated data will be freed. The caller becomes
+ * responsible for freeing any other data.
+ *
* RETURNS:
* 0 if devres is found and freed, -ENOENT if not found.
*/
@@ -326,6 +330,37 @@ int devres_destroy(struct device *dev, dr_release_t release,
}
EXPORT_SYMBOL_GPL(devres_destroy);
+
+/**
+ * devres_release - Find a device resource and destroy it, calling release
+ * @dev: Device to find resource from
+ * @release: Look for resources associated with this release function
+ * @match: Match function (optional)
+ * @match_data: Data for the match function
+ *
+ * Find the latest devres of @dev associated with @release and for
+ * which @match returns 1. If @match is NULL, it's considered to
+ * match all. If found, the resource is removed atomically, the
+ * release function called and the resource freed.
+ *
+ * RETURNS:
+ * 0 if devres is found and freed, -ENOENT if not found.
+ */
+int devres_release(struct device *dev, dr_release_t release,
+ dr_match_t match, void *match_data)
+{
+ void *res;
+
+ res = devres_remove(dev, release, match, match_data);
+ if (unlikely(!res))
+ return -ENOENT;
+
+ (*release)(dev, res);
+ devres_free(res);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devres_release);
+
static int remove_nodes(struct device *dev,
struct list_head *first, struct list_head *end,
struct list_head *todo)
diff --git a/drivers/base/devtmpfs.c b/drivers/base/devtmpfs.c
index 8493536ea55b..765c3a28077a 100644
--- a/drivers/base/devtmpfs.c
+++ b/drivers/base/devtmpfs.c
@@ -7,9 +7,9 @@
* devtmpfs, a tmpfs-based filesystem is created. Every driver-core
* device which requests a device node, will add a node in this
* filesystem.
- * By default, all devices are named after the the name of the
- * device, owned by root and have a default mode of 0600. Subsystems
- * can overwrite the default setting if needed.
+ * By default, all devices are named after the name of the device,
+ * owned by root and have a default mode of 0600. Subsystems can
+ * overwrite the default setting if needed.
*/
#include <linux/kernel.h>
diff --git a/drivers/base/dma-buf.c b/drivers/base/dma-buf.c
index 07cbbc6fddb4..05c64c11bad2 100644
--- a/drivers/base/dma-buf.c
+++ b/drivers/base/dma-buf.c
@@ -293,7 +293,7 @@ EXPORT_SYMBOL_GPL(dma_buf_unmap_attachment);
* cpu in the kernel context. Calls begin_cpu_access to allow exporter-specific
* preparations. Coherency is only guaranteed in the specified range for the
* specified access direction.
- * @dma_buf: [in] buffer to prepare cpu access for.
+ * @dmabuf: [in] buffer to prepare cpu access for.
* @start: [in] start of range for cpu access.
* @len: [in] length of range for cpu access.
* @direction: [in] length of range for cpu access.
@@ -320,7 +320,7 @@ EXPORT_SYMBOL_GPL(dma_buf_begin_cpu_access);
* cpu in the kernel context. Calls end_cpu_access to allow exporter-specific
* actions. Coherency is only guaranteed in the specified range for the
* specified access direction.
- * @dma_buf: [in] buffer to complete cpu access for.
+ * @dmabuf: [in] buffer to complete cpu access for.
* @start: [in] start of range for cpu access.
* @len: [in] length of range for cpu access.
* @direction: [in] length of range for cpu access.
@@ -340,7 +340,7 @@ EXPORT_SYMBOL_GPL(dma_buf_end_cpu_access);
/**
* dma_buf_kmap_atomic - Map a page of the buffer object into kernel address
* space. The same restrictions as for kmap_atomic and friends apply.
- * @dma_buf: [in] buffer to map page from.
+ * @dmabuf: [in] buffer to map page from.
* @page_num: [in] page in PAGE_SIZE units to map.
*
* This call must always succeed, any necessary preparations that might fail
@@ -356,7 +356,7 @@ EXPORT_SYMBOL_GPL(dma_buf_kmap_atomic);
/**
* dma_buf_kunmap_atomic - Unmap a page obtained by dma_buf_kmap_atomic.
- * @dma_buf: [in] buffer to unmap page from.
+ * @dmabuf: [in] buffer to unmap page from.
* @page_num: [in] page in PAGE_SIZE units to unmap.
* @vaddr: [in] kernel space pointer obtained from dma_buf_kmap_atomic.
*
@@ -375,7 +375,7 @@ EXPORT_SYMBOL_GPL(dma_buf_kunmap_atomic);
/**
* dma_buf_kmap - Map a page of the buffer object into kernel address space. The
* same restrictions as for kmap and friends apply.
- * @dma_buf: [in] buffer to map page from.
+ * @dmabuf: [in] buffer to map page from.
* @page_num: [in] page in PAGE_SIZE units to map.
*
* This call must always succeed, any necessary preparations that might fail
@@ -391,7 +391,7 @@ EXPORT_SYMBOL_GPL(dma_buf_kmap);
/**
* dma_buf_kunmap - Unmap a page obtained by dma_buf_kmap.
- * @dma_buf: [in] buffer to unmap page from.
+ * @dmabuf: [in] buffer to unmap page from.
* @page_num: [in] page in PAGE_SIZE units to unmap.
* @vaddr: [in] kernel space pointer obtained from dma_buf_kmap.
*
diff --git a/drivers/base/driver.c b/drivers/base/driver.c
index 3ec3896c83a6..207c27ddf828 100644
--- a/drivers/base/driver.c
+++ b/drivers/base/driver.c
@@ -80,7 +80,7 @@ struct device *driver_find_device(struct device_driver *drv,
struct klist_iter i;
struct device *dev;
- if (!drv)
+ if (!drv || !drv->p)
return NULL;
klist_iter_init_node(&drv->p->klist_devices, &i,
diff --git a/drivers/base/regmap/Kconfig b/drivers/base/regmap/Kconfig
index 0f6c7fb418e8..9ef0a5326f17 100644
--- a/drivers/base/regmap/Kconfig
+++ b/drivers/base/regmap/Kconfig
@@ -14,5 +14,8 @@ config REGMAP_I2C
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 defd57963c84..5e75d1b683e2 100644
--- a/drivers/base/regmap/Makefile
+++ b/drivers/base/regmap/Makefile
@@ -3,4 +3,5 @@ obj-$(CONFIG_REGMAP) += regcache-rbtree.o regcache-lzo.o
obj-$(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 fcafc5b2e651..b986b8660b0c 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -26,21 +26,30 @@ struct regmap_format {
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;
+ const char *name;
#ifdef CONFIG_DEBUG_FS
struct dentry *debugfs;
+ const char *debugfs_name;
#endif
unsigned int max_register;
@@ -52,6 +61,10 @@ struct regmap {
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 +92,9 @@ struct regmap {
struct reg_default *patch;
int patch_regs;
+
+ /* if set, converts bulk rw to single rw */
+ bool use_single_rw;
};
struct regcache_ops {
@@ -101,11 +117,11 @@ int _regmap_write(struct regmap *map, unsigned int reg,
#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 483b06d4a380..afd6aa91a0df 100644
--- a/drivers/base/regmap/regcache-lzo.c
+++ b/drivers/base/regmap/regcache-lzo.c
@@ -108,7 +108,7 @@ static int regcache_lzo_decompress_cache_block(struct regmap *map,
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_blkindex(struct regmap *map,
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 @@ static int regcache_lzo_write(struct regmap *map,
}
/* 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 92b779ee002b..e6732cf7c06e 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -39,11 +39,12 @@ struct regcache_rbtree_ctx {
};
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 @@ static struct regcache_rbtree_node *regcache_rbtree_lookup(struct regmap *map,
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 @@ static struct regcache_rbtree_node *regcache_rbtree_lookup(struct regmap *map,
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 @@ static struct regcache_rbtree_node *regcache_rbtree_lookup(struct regmap *map,
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 @@ static int regcache_rbtree_insert(struct rb_root *root,
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 @@ static int rbtree_show(struct seq_file *s, void *ignored)
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 @@ static int rbtree_show(struct seq_file *s, void *ignored)
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 @@ static int regcache_rbtree_read(struct regmap *map,
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 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
*/
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 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
/* 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 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
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 @@ static int regcache_rbtree_sync(struct regmap *map, unsigned int min,
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 74b69095def6..835883bda977 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -59,7 +59,7 @@ static int regcache_hw_init(struct regmap *map)
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 @@ static int regcache_hw_init(struct regmap *map)
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 regcache_init(struct regmap *map, const struct regmap_config *config)
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 @@ int regcache_sync(struct regmap *map)
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 @@ int regcache_sync(struct regmap *map)
/* 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 @@ out:
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 @@ int regcache_sync_region(struct regmap *map, unsigned int min,
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 @@ out:
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 @@ EXPORT_SYMBOL_GPL(regcache_sync_region);
*/
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 @@ EXPORT_SYMBOL_GPL(regcache_cache_only);
*/
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 @@ EXPORT_SYMBOL_GPL(regcache_mark_dirty);
*/
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 251eb70f83e7..bb1ff175b962 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -80,7 +80,7 @@ static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,
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 @@ static ssize_t regmap_access_read_file(struct file *file,
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 @@ static const struct file_operations regmap_access_fops = {
.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_init(struct regmap *map)
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 9a3a8c564389..5f6b2478bf17 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 @@ static int regmap_i2c_write(struct device *dev, const void *data, size_t count)
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 @@ static int regmap_i2c_gather_write(struct device *dev,
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 @@ 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, config);
+ return regmap_init(&i2c->dev, &regmap_i2c, &i2c->dev, config);
}
EXPORT_SYMBOL_GPL(regmap_init_i2c);
@@ -124,7 +127,7 @@ 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, config);
+ return devm_regmap_init(&i2c->dev, &regmap_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 1befaa7a31cb..4fac4b9be88f 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -15,6 +15,7 @@
#include <linux/regmap.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
+#include <linux/irqdomain.h>
#include <linux/slab.h>
#include "internal.h"
@@ -26,18 +27,20 @@ struct regmap_irq_chip_data {
struct regmap_irq_chip *chip;
int irq_base;
+ struct irq_domain *domain;
- void *status_reg_buf;
unsigned int *status_buf;
unsigned int *mask_buf;
unsigned int *mask_buf_def;
+
+ unsigned int irq_reg_stride;
};
static inline const
struct regmap_irq *irq_to_regmap_irq(struct regmap_irq_chip_data *data,
int irq)
{
- return &data->chip->irqs[irq - data->irq_base];
+ return &data->chip->irqs[irq];
}
static void regmap_irq_lock(struct irq_data *data)
@@ -50,6 +53,7 @@ static void regmap_irq_lock(struct irq_data *data)
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 +62,13 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
* 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->irq_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 +77,19 @@ static void regmap_irq_sync_unlock(struct irq_data *data)
static void regmap_irq_enable(struct irq_data *data)
{
struct regmap_irq_chip_data *d = irq_data_get_irq_chip_data(data);
- const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->irq);
+ struct regmap *map = d->map;
+ const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->hwirq);
- 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);
- const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->irq);
+ struct regmap *map = d->map;
+ const struct regmap_irq *irq_data = irq_to_regmap_irq(d, data->hwirq);
- 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 = {
@@ -98,18 +106,8 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
struct regmap_irq_chip *chip = data->chip;
struct regmap *map = data->map;
int ret, i;
- u8 *buf8 = data->status_reg_buf;
- u16 *buf16 = data->status_reg_buf;
- u32 *buf32 = data->status_reg_buf;
bool handled = false;
- ret = regmap_bulk_read(map, chip->status_base, data->status_reg_buf,
- chip->num_regs);
- if (ret != 0) {
- dev_err(map->dev, "Failed to read IRQ status: %d\n", ret);
- return IRQ_NONE;
- }
-
/*
* Ignore masked IRQs and ack if we need to; we ack early so
* there is no race between handling and acknowleding the
@@ -118,36 +116,34 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
* doing a write per register.
*/
for (i = 0; i < data->chip->num_regs; i++) {
- switch (map->format.val_bytes) {
- case 1:
- data->status_buf[i] = buf8[i];
- break;
- case 2:
- data->status_buf[i] = buf16[i];
- break;
- case 4:
- data->status_buf[i] = buf32[i];
- break;
- default:
- BUG();
+ ret = regmap_read(map, chip->status_base + (i * map->reg_stride
+ * data->irq_reg_stride),
+ &data->status_buf[i]);
+
+ if (ret != 0) {
+ dev_err(map->dev, "Failed to read IRQ status: %d\n",
+ ret);
return IRQ_NONE;
}
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->irq_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) {
- handle_nested_irq(data->irq_base + i);
+ if (data->status_buf[chip->irqs[i].reg_offset /
+ map->reg_stride] & chip->irqs[i].mask) {
+ handle_nested_irq(irq_find_mapping(data->domain, i));
handled = true;
}
}
@@ -158,6 +154,31 @@ static irqreturn_t regmap_irq_thread(int irq, void *d)
return IRQ_NONE;
}
+static int regmap_irq_map(struct irq_domain *h, unsigned int virq,
+ irq_hw_number_t hw)
+{
+ struct regmap_irq_chip_data *data = h->host_data;
+
+ irq_set_chip_data(virq, data);
+ irq_set_chip_and_handler(virq, &regmap_irq_chip, handle_edge_irq);
+ irq_set_nested_thread(virq, 1);
+
+ /* ARM needs us to explicitly flag the IRQ as valid
+ * and will set them noprobe when we do so. */
+#ifdef CONFIG_ARM
+ set_irq_flags(virq, IRQF_VALID);
+#else
+ irq_set_noprobe(virq);
+#endif
+
+ return 0;
+}
+
+static struct irq_domain_ops regmap_domain_ops = {
+ .map = regmap_irq_map,
+ .xlate = irq_domain_xlate_twocell,
+};
+
/**
* regmap_add_irq_chip(): Use standard regmap IRQ controller handling
*
@@ -178,30 +199,37 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
struct regmap_irq_chip_data **data)
{
struct regmap_irq_chip_data *d;
- int cur_irq, i;
+ int i;
int ret = -ENOMEM;
- 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",
- irq_base);
- return irq_base;
+ 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;
+ }
+
+ if (irq_base) {
+ 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",
+ irq_base);
+ return irq_base;
+ }
}
d = kzalloc(sizeof(*d), GFP_KERNEL);
if (!d)
return -ENOMEM;
+ *data = d;
+
d->status_buf = kzalloc(sizeof(unsigned int) * chip->num_regs,
GFP_KERNEL);
if (!d->status_buf)
goto err_alloc;
- d->status_reg_buf = kzalloc(map->format.val_bytes * chip->num_regs,
- GFP_KERNEL);
- if (!d->status_reg_buf)
- goto err_alloc;
-
d->mask_buf = kzalloc(sizeof(unsigned int) * chip->num_regs,
GFP_KERNEL);
if (!d->mask_buf)
@@ -215,54 +243,59 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
d->map = map;
d->chip = chip;
d->irq_base = irq_base;
+
+ if (chip->irq_reg_stride)
+ d->irq_reg_stride = chip->irq_reg_stride;
+ else
+ d->irq_reg_stride = 1;
+
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->irq_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;
}
}
- /* Register them with genirq */
- for (cur_irq = irq_base;
- cur_irq < chip->num_irqs + irq_base;
- cur_irq++) {
- irq_set_chip_data(cur_irq, d);
- irq_set_chip_and_handler(cur_irq, &regmap_irq_chip,
- handle_edge_irq);
- irq_set_nested_thread(cur_irq, 1);
-
- /* ARM needs us to explicitly flag the IRQ as valid
- * and will set them noprobe when we do so. */
-#ifdef CONFIG_ARM
- set_irq_flags(cur_irq, IRQF_VALID);
-#else
- irq_set_noprobe(cur_irq);
-#endif
+ if (irq_base)
+ d->domain = irq_domain_add_legacy(map->dev->of_node,
+ chip->num_irqs, irq_base, 0,
+ &regmap_domain_ops, d);
+ else
+ d->domain = irq_domain_add_linear(map->dev->of_node,
+ chip->num_irqs,
+ &regmap_domain_ops, d);
+ if (!d->domain) {
+ dev_err(map->dev, "Failed to create IRQ domain\n");
+ ret = -ENOMEM;
+ goto err_alloc;
}
ret = request_threaded_irq(irq, NULL, regmap_irq_thread, irq_flags,
chip->name, d);
if (ret != 0) {
dev_err(map->dev, "Failed to request IRQ %d: %d\n", irq, ret);
- goto err_alloc;
+ goto err_domain;
}
return 0;
+err_domain:
+ /* Should really dispose of the domain but... */
err_alloc:
kfree(d->mask_buf_def);
kfree(d->mask_buf);
- kfree(d->status_reg_buf);
kfree(d->status_buf);
kfree(d);
return ret;
@@ -281,9 +314,9 @@ void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *d)
return;
free_irq(irq, d);
+ /* We should unmap the domain but... */
kfree(d->mask_buf_def);
kfree(d->mask_buf);
- kfree(d->status_reg_buf);
kfree(d->status_buf);
kfree(d);
}
@@ -298,6 +331,21 @@ EXPORT_SYMBOL_GPL(regmap_del_irq_chip);
*/
int regmap_irq_chip_get_base(struct regmap_irq_chip_data *data)
{
+ WARN_ON(!data->irq_base);
return data->irq_base;
}
EXPORT_SYMBOL_GPL(regmap_irq_chip_get_base);
+
+/**
+ * regmap_irq_get_virq(): Map an interrupt on a chip to a virtual IRQ
+ *
+ * Useful for drivers to request their own IRQs.
+ *
+ * @data: regmap_irq controller to operate on.
+ * @irq: index of the interrupt requested in the chip IRQs
+ */
+int regmap_irq_get_virq(struct regmap_irq_chip_data *data, int irq)
+{
+ return irq_create_mapping(data->domain, irq);
+}
+EXPORT_SYMBOL_GPL(regmap_irq_get_virq);
diff --git a/drivers/base/regmap/regmap-mmio.c b/drivers/base/regmap/regmap-mmio.c
new file mode 100644
index 000000000000..febd6de6c8ac
--- /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, &regmap_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, &regmap_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 7c0c35a39c33..ffa46a92ad33 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 @@ static int regmap_spi_gather_write(struct device *dev,
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 @@ static struct regmap_bus regmap_spi = {
struct regmap *regmap_init_spi(struct spi_device *spi,
const struct regmap_config *config)
{
- return regmap_init(&spi->dev, &regmap_spi, config);
+ return regmap_init(&spi->dev, &regmap_spi, &spi->dev, config);
}
EXPORT_SYMBOL_GPL(regmap_init_spi);
@@ -83,7 +86,7 @@ EXPORT_SYMBOL_GPL(regmap_init_spi);
struct regmap *devm_regmap_init_spi(struct spi_device *spi,
const struct regmap_config *config)
{
- return devm_regmap_init(&spi->dev, &regmap_spi, config);
+ return devm_regmap_init(&spi->dev, &regmap_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 7a3f535e481c..0bcda488f11c 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -112,25 +112,36 @@ static void regmap_format_10_14_write(struct regmap *map,
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 @@ static unsigned int regmap_parse_16(void *buf)
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 +179,41 @@ static unsigned int regmap_parse_32(void *buf)
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);
+}
+
+static void dev_get_regmap_release(struct device *dev, void *res)
+{
+ /*
+ * We don't actually have anything to do here; the goal here
+ * is not to manage the regmap but to provide a simple way to
+ * get the regmap back given a struct device.
+ */
+}
+
/**
* 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
@@ -171,9 +222,10 @@ static unsigned int regmap_parse_32(void *buf)
*/
struct regmap *regmap_init(struct device *dev,
const struct regmap_bus *bus,
+ void *bus_context,
const struct regmap_config *config)
{
- struct regmap *map;
+ struct regmap *map, **m;
int ret = -EINVAL;
if (!bus || !config)
@@ -185,20 +237,36 @@ struct regmap *regmap_init(struct device *dev,
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;
map->volatile_reg = config->volatile_reg;
map->precious_reg = config->precious_reg;
map->cache_type = config->cache_type;
+ map->name = config->name;
if (config->read_flag_mask || config->write_flag_mask) {
map->read_flag_mask = config->read_flag_mask;
@@ -207,7 +275,7 @@ struct regmap *regmap_init(struct device *dev,
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 +341,19 @@ struct regmap *regmap_init(struct device *dev,
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;
@@ -289,14 +364,25 @@ struct regmap *regmap_init(struct device *dev,
goto err_map;
}
- regmap_debugfs_init(map);
+ regmap_debugfs_init(map, config->name);
ret = regcache_init(map, config);
if (ret < 0)
goto err_free_workbuf;
+ /* Add a devres resource for dev_get_regmap() */
+ m = devres_alloc(dev_get_regmap_release, sizeof(*m), GFP_KERNEL);
+ if (!m) {
+ ret = -ENOMEM;
+ goto err_cache;
+ }
+ *m = map;
+ devres_add(dev, m);
+
return map;
+err_cache:
+ regcache_exit(map);
err_free_workbuf:
kfree(map->work_buf);
err_map:
@@ -316,6 +402,7 @@ static void devm_regmap_release(struct device *dev, void *res)
*
* @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 +412,7 @@ static void devm_regmap_release(struct device *dev, void *res)
*/
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 +421,7 @@ struct regmap *devm_regmap_init(struct device *dev,
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 +448,7 @@ int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config)
{
int ret;
- mutex_lock(&map->lock);
+ map->lock(map);
regcache_exit(map);
regmap_debugfs_exit(map);
@@ -372,14 +460,14 @@ int regmap_reinit_cache(struct regmap *map, const struct regmap_config *config)
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;
}
@@ -391,11 +479,51 @@ void regmap_exit(struct regmap *map)
{
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);
}
EXPORT_SYMBOL_GPL(regmap_exit);
+static int dev_get_regmap_match(struct device *dev, void *res, void *data)
+{
+ struct regmap **r = res;
+ if (!r || !*r) {
+ WARN_ON(!r || !*r);
+ return 0;
+ }
+
+ /* If the user didn't specify a name match any */
+ if (data)
+ return (*r)->name == data;
+ else
+ return 1;
+}
+
+/**
+ * dev_get_regmap(): Obtain the regmap (if any) for a device
+ *
+ * @dev: Device to retrieve the map for
+ * @name: Optional name for the register map, usually NULL.
+ *
+ * Returns the regmap for the device if one is present, or NULL. If
+ * name is specified then it must match the name specified when
+ * registering the device, if it is NULL then the first regmap found
+ * will be used. Devices with multiple register maps are very rare,
+ * generic code should normally not need to specify a name.
+ */
+struct regmap *dev_get_regmap(struct device *dev, const char *name)
+{
+ struct regmap **r = devres_find(dev, dev_get_regmap_release,
+ dev_get_regmap_match, (void *)name);
+
+ if (!r)
+ return NULL;
+ return *r;
+}
+EXPORT_SYMBOL_GPL(dev_get_regmap);
+
static int _regmap_raw_write(struct regmap *map, unsigned int reg,
const void *val, size_t val_len)
{
@@ -408,7 +536,8 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
/* 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 +546,8 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
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 +561,7 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
}
}
- 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 +574,12 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
*/
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 +594,7 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
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 +628,7 @@ int _regmap_write(struct regmap *map, unsigned int reg,
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 +636,7 @@ int _regmap_write(struct regmap *map, unsigned int reg,
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 +659,14 @@ int regmap_write(struct regmap *map, unsigned int reg, unsigned int val)
{
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 +693,16 @@ int regmap_raw_write(struct regmap *map, unsigned int reg,
{
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 +731,10 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
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 +749,28 @@ int regmap_bulk_write(struct regmap *map, unsigned int reg, const void *val,
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 +781,7 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
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 +794,7 @@ static int _regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
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);
@@ -672,6 +827,9 @@ static int _regmap_read(struct regmap *map, unsigned int reg,
trace_regmap_reg_read(map->dev, reg, *val);
}
+ if (ret == 0 && !map->cache_bypass)
+ regcache_write(map, reg, *val);
+
return ret;
}
@@ -689,11 +847,14 @@ int regmap_read(struct regmap *map, unsigned int reg, unsigned int *val)
{
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 +879,12 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
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 +896,17 @@ int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
* 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;
}
@@ -765,19 +932,40 @@ int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
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++) {
- ret = regmap_read(map, reg + i, val + (i * val_bytes));
+ unsigned int ival;
+ ret = regmap_read(map, reg + (i * map->reg_stride),
+ &ival);
if (ret != 0)
return ret;
+ memcpy(val + (i * val_bytes), &ival, val_bytes);
}
}
@@ -792,7 +980,7 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
int ret;
unsigned int tmp, orig;
- mutex_lock(&map->lock);
+ map->lock(map);
ret = _regmap_read(map, reg, &orig);
if (ret != 0)
@@ -809,7 +997,7 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
}
out:
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
@@ -876,7 +1064,7 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
if (map->patch)
return -EBUSY;
- mutex_lock(&map->lock);
+ map->lock(map);
bypass = map->cache_bypass;
@@ -904,7 +1092,7 @@ int regmap_register_patch(struct regmap *map, const struct reg_default *regs,
out:
map->cache_bypass = bypass;
- mutex_unlock(&map->lock);
+ map->unlock(map);
return ret;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-22 01:12:24 +0000