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| author | Axel Lin <axel.lin@gmail.com> | 2012-07-19 11:16:06 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2012-08-28 11:00:16 -0700 |
| commit | 2a2c3ac0a584246cf9fdab69941b8aad54749581 (patch) | |
| tree | 34729dcb70ac377ed6ea6f9f5a20ecfabd55645c /drivers/regulator/mc13783-regulator.c | |
| parent | 4a247a961aaa0c611c68b56da3962c387c8e2e84 (diff) | |
| download | linux-2a2c3ac0a584246cf9fdab69941b8aad54749581.tar.gz linux-2a2c3ac0a584246cf9fdab69941b8aad54749581.tar.bz2 linux-2a2c3ac0a584246cf9fdab69941b8aad54749581.zip | |
regulator: mc13783: Make mc13783_powermisc_rmw() lock protected
Then we can remove lock/unlock around the caller.
Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Diffstat (limited to 'drivers/regulator/mc13783-regulator.c')
| -rw-r--r-- | drivers/regulator/mc13783-regulator.c | 22 |
1 files changed, 8 insertions, 14 deletions
diff --git a/drivers/regulator/mc13783-regulator.c b/drivers/regulator/mc13783-regulator.c index 4932e3449fe1..2587ea1f7438 100644 --- a/drivers/regulator/mc13783-regulator.c +++ b/drivers/regulator/mc13783-regulator.c @@ -238,9 +238,10 @@ static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask, BUG_ON(val & ~mask); + mc13xxx_lock(priv->mc13xxx); ret = mc13xxx_reg_read(mc13783, MC13783_REG_POWERMISC, &valread); if (ret) - return ret; + goto out; /* Update the stored state for Power Gates. */ priv->powermisc_pwgt_state = @@ -253,7 +254,10 @@ static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask, valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) | priv->powermisc_pwgt_state; - return mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread); + ret = mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread); +out: + mc13xxx_unlock(priv->mc13xxx); + return ret; } static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev) @@ -261,7 +265,6 @@ static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev) struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; int id = rdev_get_id(rdev); - int ret; u32 en_val = mc13xxx_regulators[id].enable_bit; dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); @@ -271,12 +274,8 @@ static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev) id == MC13783_REG_PWGT2SPI) en_val = 0; - mc13xxx_lock(priv->mc13xxx); - ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit, + return mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit, en_val); - mc13xxx_unlock(priv->mc13xxx); - - return ret; } static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev) @@ -284,7 +283,6 @@ static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev) struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; int id = rdev_get_id(rdev); - int ret; u32 dis_val = 0; dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); @@ -294,12 +292,8 @@ static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev) id == MC13783_REG_PWGT2SPI) dis_val = mc13xxx_regulators[id].enable_bit; - mc13xxx_lock(priv->mc13xxx); - ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit, + return mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit, dis_val); - mc13xxx_unlock(priv->mc13xxx); - - return ret; } static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev) |