regulator: mc13892: Make mc13892_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>

diff --git a/drivers/regulator/mc13892-regulator.c b/drivers/regulator/mc13892-regulator.c
index b388b74..9d4296b 100644 (file)
--- a/drivers/regulator/mc13892-regulator.c
+++ b/drivers/regulator/mc13892-regulator.c
@@ -305,9 +305,10 @@ static int mc13892_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
 
        BUG_ON(val & ~mask);
 
+       mc13xxx_lock(priv->mc13xxx);
        ret = mc13xxx_reg_read(mc13892, MC13892_POWERMISC, &valread);
        if (ret)
-               return ret;
+               goto out;
 
        /* Update the stored state for Power Gates. */
        priv->powermisc_pwgt_state =
@@ -320,14 +321,16 @@ static int mc13892_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask,
        valread = (valread & ~MC13892_POWERMISC_PWGTSPI_M) |
                priv->powermisc_pwgt_state;
 
-       return mc13xxx_reg_write(mc13892, MC13892_POWERMISC, valread);
+       ret = mc13xxx_reg_write(mc13892, MC13892_POWERMISC, valread);
+out:
+       mc13xxx_unlock(priv->mc13xxx);
+       return ret;
 }
 
 static int mc13892_gpo_regulator_enable(struct regulator_dev *rdev)
 {
        struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
        int id = rdev_get_id(rdev);
-       int ret;
        u32 en_val = mc13892_regulators[id].enable_bit;
        u32 mask = mc13892_regulators[id].enable_bit;
 
@@ -340,18 +343,13 @@ static int mc13892_gpo_regulator_enable(struct regulator_dev *rdev)
        if (id == MC13892_GPO4)
                mask |= MC13892_POWERMISC_GPO4ADINEN;
 
-       mc13xxx_lock(priv->mc13xxx);
-       ret = mc13892_powermisc_rmw(priv, mask, en_val);
-       mc13xxx_unlock(priv->mc13xxx);
-
-       return ret;
+       return mc13892_powermisc_rmw(priv, mask, en_val);
 }
 
 static int mc13892_gpo_regulator_disable(struct regulator_dev *rdev)
 {
        struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev);
        int id = rdev_get_id(rdev);
-       int ret;
        u32 dis_val = 0;
 
        dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
@@ -360,12 +358,8 @@ static int mc13892_gpo_regulator_disable(struct regulator_dev *rdev)
        if (id == MC13892_PWGT1SPI || id == MC13892_PWGT2SPI)
                dis_val = mc13892_regulators[id].enable_bit;
 
-       mc13xxx_lock(priv->mc13xxx);
-       ret = mc13892_powermisc_rmw(priv, mc13892_regulators[id].enable_bit,
+       return mc13892_powermisc_rmw(priv, mc13892_regulators[id].enable_bit,
                dis_val);
-       mc13xxx_unlock(priv->mc13xxx);
-
-       return ret;
 }
 
 static int mc13892_gpo_regulator_is_enabled(struct regulator_dev *rdev)