From 7ff0589c7bff4ca31b255ac2028f633f14047762 Mon Sep 17 00:00:00 2001
From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Date: Tue, 16 Jun 2015 08:52:22 +0000
Subject: [PATCH] regmap: add force_write option on _regmap_update_bits()
Sometimes we want to write data even though it doesn't change value.
Then, force_write option on _regmap_update_bits() helps this purpose.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
drivers/base/regmap/regmap.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index 7111d04f26218..69ec411ce7224 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -34,7 +34,7 @@
static int _regmap_update_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val,
- bool *change);
+ bool *change, bool force_write);
static int _regmap_bus_reg_read(void *context, unsigned int reg,
unsigned int *val);
@@ -1178,7 +1178,7 @@ static int _regmap_select_page(struct regmap *map, unsigned int *reg,
ret = _regmap_update_bits(map, range->selector_reg,
range->selector_mask,
win_page << range->selector_shift,
- &page_chg);
+ &page_chg, false);
map->work_buf = orig_work_buf;
@@ -2327,7 +2327,7 @@ EXPORT_SYMBOL_GPL(regmap_bulk_read);
static int _regmap_update_bits(struct regmap *map, unsigned int reg,
unsigned int mask, unsigned int val,
- bool *change)
+ bool *change, bool force_write)
{
int ret;
unsigned int tmp, orig;
@@ -2339,7 +2339,7 @@ static int _regmap_update_bits(struct regmap *map, unsigned int reg,
tmp = orig & ~mask;
tmp |= val & mask;
- if (tmp != orig) {
+ if (force_write || (tmp != orig)) {
ret = _regmap_write(map, reg, tmp);
if (change)
*change = true;
@@ -2367,7 +2367,7 @@ int regmap_update_bits(struct regmap *map, unsigned int reg,
int ret;
map->lock(map->lock_arg);
- ret = _regmap_update_bits(map, reg, mask, val, NULL);
+ ret = _regmap_update_bits(map, reg, mask, val, NULL, false);
map->unlock(map->lock_arg);
return ret;
@@ -2398,7 +2398,7 @@ int regmap_update_bits_async(struct regmap *map, unsigned int reg,
map->async = true;
- ret = _regmap_update_bits(map, reg, mask, val, NULL);
+ ret = _regmap_update_bits(map, reg, mask, val, NULL, false);
map->async = false;
@@ -2427,7 +2427,7 @@ int regmap_update_bits_check(struct regmap *map, unsigned int reg,
int ret;
map->lock(map->lock_arg);
- ret = _regmap_update_bits(map, reg, mask, val, change);
+ ret = _regmap_update_bits(map, reg, mask, val, change, false);
map->unlock(map->lock_arg);
return ret;
}
@@ -2460,7 +2460,7 @@ int regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
map->async = true;
- ret = _regmap_update_bits(map, reg, mask, val, change);
+ ret = _regmap_update_bits(map, reg, mask, val, change, false);
map->async = false;
--
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