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-rw-r--r--drivers/base/regmap/internal.h2
-rw-r--r--drivers/base/regmap/regcache-lzo.c17
-rw-r--r--drivers/base/regmap/regcache-rbtree.c28
-rw-r--r--drivers/base/regmap/regcache.c83
-rw-r--r--drivers/base/regmap/regmap-debugfs.c76
-rw-r--r--drivers/base/regmap/regmap-irq.c1
-rw-r--r--drivers/base/regmap/regmap.c72
7 files changed, 245 insertions, 34 deletions
diff --git a/drivers/base/regmap/internal.h b/drivers/base/regmap/internal.h
index abd76678ed73..fcafc5b2e651 100644
--- a/drivers/base/regmap/internal.h
+++ b/drivers/base/regmap/internal.h
@@ -88,7 +88,7 @@ struct regcache_ops {
int (*exit)(struct regmap *map);
int (*read)(struct regmap *map, unsigned int reg, unsigned int *value);
int (*write)(struct regmap *map, unsigned int reg, unsigned int value);
- int (*sync)(struct regmap *map);
+ int (*sync)(struct regmap *map, unsigned int min, unsigned int max);
};
bool regmap_writeable(struct regmap *map, unsigned int reg);
diff --git a/drivers/base/regmap/regcache-lzo.c b/drivers/base/regmap/regcache-lzo.c
index b7d16143edeb..483b06d4a380 100644
--- a/drivers/base/regmap/regcache-lzo.c
+++ b/drivers/base/regmap/regcache-lzo.c
@@ -11,6 +11,7 @@
*/
#include <linux/slab.h>
+#include <linux/device.h>
#include <linux/lzo.h>
#include "internal.h"
@@ -331,7 +332,8 @@ out:
return ret;
}
-static int regcache_lzo_sync(struct regmap *map)
+static int regcache_lzo_sync(struct regmap *map, unsigned int min,
+ unsigned int max)
{
struct regcache_lzo_ctx **lzo_blocks;
unsigned int val;
@@ -339,10 +341,21 @@ static int regcache_lzo_sync(struct regmap *map)
int ret;
lzo_blocks = map->cache;
- for_each_set_bit(i, lzo_blocks[0]->sync_bmp, lzo_blocks[0]->sync_bmp_nbits) {
+ i = min;
+ for_each_set_bit_from(i, lzo_blocks[0]->sync_bmp,
+ lzo_blocks[0]->sync_bmp_nbits) {
+ if (i > max)
+ continue;
+
ret = regcache_read(map, i, &val);
if (ret)
return ret;
+
+ /* Is this the hardware default? If so skip. */
+ ret = regcache_lookup_reg(map, i);
+ if (ret > 0 && val == map->reg_defaults[ret].def)
+ continue;
+
map->cache_bypass = 1;
ret = _regmap_write(map, i, val);
map->cache_bypass = 0;
diff --git a/drivers/base/regmap/regcache-rbtree.c b/drivers/base/regmap/regcache-rbtree.c
index 32620c4f1683..5157fa04c2f0 100644
--- a/drivers/base/regmap/regcache-rbtree.c
+++ b/drivers/base/regmap/regcache-rbtree.c
@@ -11,6 +11,7 @@
*/
#include <linux/slab.h>
+#include <linux/device.h>
#include <linux/debugfs.h>
#include <linux/rbtree.h>
#include <linux/seq_file.h>
@@ -357,7 +358,8 @@ static int regcache_rbtree_write(struct regmap *map, unsigned int reg,
return 0;
}
-static int regcache_rbtree_sync(struct regmap *map)
+static int regcache_rbtree_sync(struct regmap *map, unsigned int min,
+ unsigned int max)
{
struct regcache_rbtree_ctx *rbtree_ctx;
struct rb_node *node;
@@ -365,19 +367,37 @@ static int regcache_rbtree_sync(struct regmap *map)
unsigned int regtmp;
unsigned int val;
int ret;
- int i;
+ int i, base, end;
rbtree_ctx = map->cache;
for (node = rb_first(&rbtree_ctx->root); node; node = rb_next(node)) {
rbnode = rb_entry(node, struct regcache_rbtree_node, node);
- for (i = 0; i < rbnode->blklen; i++) {
+
+ if (rbnode->base_reg < min)
+ continue;
+ if (rbnode->base_reg > max)
+ break;
+ if (rbnode->base_reg + rbnode->blklen < min)
+ continue;
+
+ if (min > rbnode->base_reg)
+ base = min - rbnode->base_reg;
+ else
+ base = 0;
+
+ if (max < rbnode->base_reg + rbnode->blklen)
+ end = rbnode->base_reg + rbnode->blklen - max;
+ else
+ end = rbnode->blklen;
+
+ for (i = base; i < end; i++) {
regtmp = rbnode->base_reg + i;
val = regcache_rbtree_get_register(rbnode, i,
map->cache_word_size);
/* Is this the hardware default? If so skip. */
ret = regcache_lookup_reg(map, i);
- if (ret > 0 && val == map->reg_defaults[ret].def)
+ if (ret >= 0 && val == map->reg_defaults[ret].def)
continue;
map->cache_bypass = 1;
diff --git a/drivers/base/regmap/regcache.c b/drivers/base/regmap/regcache.c
index 853dfffa8ce1..87f54dbf601b 100644
--- a/drivers/base/regmap/regcache.c
+++ b/drivers/base/regmap/regcache.c
@@ -12,6 +12,7 @@
#include <linux/slab.h>
#include <linux/export.h>
+#include <linux/device.h>
#include <trace/events/regmap.h>
#include <linux/bsearch.h>
#include <linux/sort.h>
@@ -257,12 +258,11 @@ int regcache_write(struct regmap *map,
int regcache_sync(struct regmap *map)
{
int ret = 0;
- unsigned int val;
unsigned int i;
const char *name;
unsigned int bypass;
- BUG_ON(!map->cache_ops);
+ BUG_ON(!map->cache_ops || !map->cache_ops->sync);
mutex_lock(&map->lock);
/* Remember the initial bypass state */
@@ -287,24 +287,11 @@ int regcache_sync(struct regmap *map)
}
map->cache_bypass = 0;
- if (map->cache_ops->sync) {
- ret = map->cache_ops->sync(map);
- } else {
- for (i = 0; i < map->num_reg_defaults; i++) {
- ret = regcache_read(map, i, &val);
- if (ret < 0)
- goto out;
- map->cache_bypass = 1;
- ret = _regmap_write(map, i, val);
- map->cache_bypass = 0;
- if (ret < 0)
- goto out;
- dev_dbg(map->dev, "Synced register %#x, value %#x\n",
- map->reg_defaults[i].reg,
- map->reg_defaults[i].def);
- }
+ ret = map->cache_ops->sync(map, 0, map->max_register);
+
+ if (ret == 0)
+ map->cache_dirty = false;
- }
out:
trace_regcache_sync(map->dev, name, "stop");
/* Restore the bypass state */
@@ -316,6 +303,51 @@ out:
EXPORT_SYMBOL_GPL(regcache_sync);
/**
+ * regcache_sync_region: Sync part of the register cache with the hardware.
+ *
+ * @map: map to sync.
+ * @min: first register to sync
+ * @max: last register to sync
+ *
+ * Write all non-default register values in the specified region to
+ * the hardware.
+ *
+ * Return a negative value on failure, 0 on success.
+ */
+int regcache_sync_region(struct regmap *map, unsigned int min,
+ unsigned int max)
+{
+ int ret = 0;
+ const char *name;
+ unsigned int bypass;
+
+ BUG_ON(!map->cache_ops || !map->cache_ops->sync);
+
+ mutex_lock(&map->lock);
+
+ /* Remember the initial bypass state */
+ bypass = map->cache_bypass;
+
+ name = map->cache_ops->name;
+ dev_dbg(map->dev, "Syncing %s cache from %d-%d\n", name, min, max);
+
+ trace_regcache_sync(map->dev, name, "start region");
+
+ if (!map->cache_dirty)
+ goto out;
+
+ ret = map->cache_ops->sync(map, min, max);
+
+out:
+ trace_regcache_sync(map->dev, name, "stop region");
+ /* Restore the bypass state */
+ map->cache_bypass = bypass;
+ mutex_unlock(&map->lock);
+
+ return ret;
+}
+
+/**
* regcache_cache_only: Put a register map into cache only mode
*
* @map: map to configure
@@ -332,6 +364,7 @@ void regcache_cache_only(struct regmap *map, bool enable)
mutex_lock(&map->lock);
WARN_ON(map->cache_bypass && enable);
map->cache_only = enable;
+ trace_regmap_cache_only(map->dev, enable);
mutex_unlock(&map->lock);
}
EXPORT_SYMBOL_GPL(regcache_cache_only);
@@ -369,6 +402,7 @@ void regcache_cache_bypass(struct regmap *map, bool enable)
mutex_lock(&map->lock);
WARN_ON(map->cache_only && enable);
map->cache_bypass = enable;
+ trace_regmap_cache_bypass(map->dev, enable);
mutex_unlock(&map->lock);
}
EXPORT_SYMBOL_GPL(regcache_cache_bypass);
@@ -391,6 +425,13 @@ bool regcache_set_val(void *base, unsigned int idx,
cache[idx] = val;
break;
}
+ case 4: {
+ u32 *cache = base;
+ if (cache[idx] == val)
+ return true;
+ cache[idx] = val;
+ break;
+ }
default:
BUG();
}
@@ -412,6 +453,10 @@ unsigned int regcache_get_val(const void *base, unsigned int idx,
const u16 *cache = base;
return cache[idx];
}
+ case 4: {
+ const u32 *cache = base;
+ return cache[idx];
+ }
default:
BUG();
}
diff --git a/drivers/base/regmap/regmap-debugfs.c b/drivers/base/regmap/regmap-debugfs.c
index b3b4b8f7f409..58517a5dac13 100644
--- a/drivers/base/regmap/regmap-debugfs.c
+++ b/drivers/base/regmap/regmap-debugfs.c
@@ -11,10 +11,10 @@
*/
#include <linux/slab.h>
-#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/debugfs.h>
#include <linux/uaccess.h>
+#include <linux/device.h>
#include "internal.h"
@@ -33,6 +33,35 @@ static int regmap_open_file(struct inode *inode, struct file *file)
return 0;
}
+static ssize_t regmap_name_read_file(struct file *file,
+ char __user *user_buf, size_t count,
+ loff_t *ppos)
+{
+ struct regmap *map = file->private_data;
+ int ret;
+ char *buf;
+
+ buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+
+ ret = snprintf(buf, PAGE_SIZE, "%s\n", map->dev->driver->name);
+ if (ret < 0) {
+ kfree(buf);
+ return ret;
+ }
+
+ ret = simple_read_from_buffer(user_buf, count, ppos, buf, ret);
+ kfree(buf);
+ return ret;
+}
+
+static const struct file_operations regmap_name_fops = {
+ .open = regmap_open_file,
+ .read = regmap_name_read_file,
+ .llseek = default_llseek,
+};
+
static ssize_t regmap_map_read_file(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
@@ -103,9 +132,51 @@ out:
return ret;
}
+#undef REGMAP_ALLOW_WRITE_DEBUGFS
+#ifdef REGMAP_ALLOW_WRITE_DEBUGFS
+/*
+ * This can be dangerous especially when we have clients such as
+ * PMICs, therefore don't provide any real compile time configuration option
+ * for this feature, people who want to use this will need to modify
+ * the source code directly.
+ */
+static ssize_t regmap_map_write_file(struct file *file,
+ const char __user *user_buf,
+ size_t count, loff_t *ppos)
+{
+ char buf[32];
+ size_t buf_size;
+ char *start = buf;
+ unsigned long reg, value;
+ struct regmap *map = file->private_data;
+
+ buf_size = min(count, (sizeof(buf)-1));
+ if (copy_from_user(buf, user_buf, buf_size))
+ return -EFAULT;
+ buf[buf_size] = 0;
+
+ while (*start == ' ')
+ start++;
+ reg = simple_strtoul(start, &start, 16);
+ while (*start == ' ')
+ start++;
+ if (strict_strtoul(start, 16, &value))
+ return -EINVAL;
+
+ /* Userspace has been fiddling around behind the kernel's back */
+ add_taint(TAINT_USER);
+
+ regmap_write(map, reg, value);
+ return buf_size;
+}
+#else
+#define regmap_map_write_file NULL
+#endif
+
static const struct file_operations regmap_map_fops = {
.open = regmap_open_file,
.read = regmap_map_read_file,
+ .write = regmap_map_write_file,
.llseek = default_llseek,
};
@@ -186,6 +257,9 @@ void regmap_debugfs_init(struct regmap *map)
return;
}
+ debugfs_create_file("name", 0400, map->debugfs,
+ map, &regmap_name_fops);
+
if (map->max_register) {
debugfs_create_file("registers", 0400, map->debugfs,
map, &regmap_map_fops);
diff --git a/drivers/base/regmap/regmap-irq.c b/drivers/base/regmap/regmap-irq.c
index 428836fc5835..1befaa7a31cb 100644
--- a/drivers/base/regmap/regmap-irq.c
+++ b/drivers/base/regmap/regmap-irq.c
@@ -11,6 +11,7 @@
*/
#include <linux/export.h>
+#include <linux/device.h>
#include <linux/regmap.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index a7c794c47b72..2507b3735c0d 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -10,8 +10,9 @@
* published by the Free Software Foundation.
*/
+#include <linux/device.h>
#include <linux/slab.h>
-#include <linux/module.h>
+#include <linux/export.h>
#include <linux/mutex.h>
#include <linux/err.h>
@@ -125,6 +126,13 @@ static void regmap_format_16(void *buf, unsigned int val)
b[0] = cpu_to_be16(val);
}
+static void regmap_format_32(void *buf, unsigned int val)
+{
+ __be32 *b = buf;
+
+ b[0] = cpu_to_be32(val);
+}
+
static unsigned int regmap_parse_8(void *buf)
{
u8 *b = buf;
@@ -141,6 +149,15 @@ static unsigned int regmap_parse_16(void *buf)
return b[0];
}
+static unsigned int regmap_parse_32(void *buf)
+{
+ __be32 *b = buf;
+
+ b[0] = be32_to_cpu(b[0]);
+
+ return b[0];
+}
+
/**
* regmap_init(): Initialise register map
*
@@ -239,6 +256,10 @@ struct regmap *regmap_init(struct device *dev,
map->format.format_reg = regmap_format_16;
break;
+ case 32:
+ map->format.format_reg = regmap_format_32;
+ break;
+
default:
goto err_map;
}
@@ -252,6 +273,10 @@ struct regmap *regmap_init(struct device *dev,
map->format.format_val = regmap_format_16;
map->format.parse_val = regmap_parse_16;
break;
+ case 32:
+ map->format.format_val = regmap_format_32;
+ map->format.parse_val = regmap_parse_32;
+ break;
}
if (!map->format.format_write &&
@@ -347,6 +372,8 @@ 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);
+
map->cache_bypass = false;
map->cache_only = false;
regmap_debugfs_init(map);
@@ -687,16 +714,32 @@ EXPORT_SYMBOL_GPL(regmap_read);
int regmap_raw_read(struct regmap *map, unsigned int reg, void *val,
size_t val_len)
{
- size_t val_count = val_len / map->format.val_bytes;
- int ret;
-
- WARN_ON(!regmap_volatile_range(map, reg, val_count) &&
- map->cache_type != REGCACHE_NONE);
+ size_t val_bytes = map->format.val_bytes;
+ size_t val_count = val_len / val_bytes;
+ unsigned int v;
+ int ret, i;
mutex_lock(&map->lock);
- ret = _regmap_raw_read(map, reg, val, val_len);
+ if (regmap_volatile_range(map, reg, val_count) || map->cache_bypass ||
+ map->cache_type == REGCACHE_NONE) {
+ /* Physical block read if there's no cache involved */
+ ret = _regmap_raw_read(map, reg, val, val_len);
+
+ } else {
+ /* Otherwise go word by word for the cache; should be low
+ * cost as we expect to hit the cache.
+ */
+ for (i = 0; i < val_count; i++) {
+ ret = _regmap_read(map, reg + i, &v);
+ if (ret != 0)
+ goto out;
+ map->format.format_val(val + (i * val_bytes), v);
+ }
+ }
+
+ out:
mutex_unlock(&map->lock);
return ret;
@@ -904,6 +947,21 @@ out:
}
EXPORT_SYMBOL_GPL(regmap_register_patch);
+/*
+ * regmap_get_val_bytes(): Report the size of a register value
+ *
+ * Report the size of a register value, mainly intended to for use by
+ * generic infrastructure built on top of regmap.
+ */
+int regmap_get_val_bytes(struct regmap *map)
+{
+ if (map->format.format_write)
+ return -EINVAL;
+
+ return map->format.val_bytes;
+}
+EXPORT_SYMBOL_GPL(regmap_get_val_bytes);
+
static int __init regmap_initcall(void)
{
regmap_debugfs_initcall();
generated by cgit v1.2.3 (git 2.0.4) at 2025-06-05 15:24:26 +0000