lkml.org 
[lkml]   [2012]   [Feb]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH V1] regmap: Support for caching in reg_raw_write()
Date
Adding support for caching of data into the
non-volatile register from the call of reg_raw_write().

This will allow the larger block of data write into multiple
register without worrying whether register is cached or not
through reg_raw_write().

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
---
drivers/base/regmap/regmap.c | 25 ++++++++++++++++++++-----
1 files changed, 20 insertions(+), 5 deletions(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 80129c0..e5986ab 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -323,6 +323,25 @@ static int _regmap_raw_write(struct regmap *map, unsigned int reg,
if (!map->writeable_reg(map->dev, reg + i))
return -EINVAL;

+ if (!map->cache_bypass && map->format.parse_val) {
+ int val_bytes = map->format.val_bytes;
+ unsigned int ival;
+ for (i = 0; i < val_len / map->format.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);
+ if (ret) {
+ dev_warn(map->dev,
+ "Error in caching of register\n");
+ return ret;
+ }
+ }
+ if (map->cache_only) {
+ map->cache_dirty = true;
+ return 0;
+ }
+ }
+
map->format.format_reg(map->work_buf, reg);

u8[0] |= map->write_flag_mask;
@@ -373,7 +392,7 @@ int _regmap_write(struct regmap *map, unsigned int reg,
int ret;
BUG_ON(!map->format.format_write && !map->format.format_val);

- if (!map->cache_bypass) {
+ if (!map->cache_bypass && map->format.format_write) {
ret = regcache_write(map, reg, val);
if (ret != 0)
return ret;
@@ -450,12 +469,8 @@ EXPORT_SYMBOL_GPL(regmap_write);
int regmap_raw_write(struct regmap *map, unsigned int reg,
const 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);
-
mutex_lock(&map->lock);

ret = _regmap_raw_write(map, reg, val, val_len);
--
1.7.1.1


\
 
 \ /
  Last update: 2012-02-10 12:37    [W:0.047 / U:0.828 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site