regulator: ab8500-ext: Get rid of is_enabled from struct ab8500_ext_regulator_info

The intention of this patch is to simplify the code.

Maintain the is_enabled flag is not trivial, it not only needs to set/clear the
flag in disable()/enable() but also needs to set the flag in is_enable() to get
initial status. The only benefit of keeping is_enabled flag is just save a
register read when set_mode(). Remove is_enabled flag makes the code simpler.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

diff --git a/drivers/regulator/ab8500-ext.c b/drivers/regulator/ab8500-ext.c
index 57d43a1..5e604a2 100644 (file)
--- a/drivers/regulator/ab8500-ext.c
+++ b/drivers/regulator/ab8500-ext.c
@@ -29,7 +29,6 @@
  * @desc: regulator description
  * @rdev: regulator device
  * @cfg: regulator configuration (extension of regulator FW configuration)
- * @is_enabled: status of regulator (on/off)
  * @update_bank: bank to control on/off
  * @update_reg: register to control on/off
  * @update_mask: mask to enable/disable and set mode of regulator
@@ -46,7 +45,6 @@ struct ab8500_ext_regulator_info {
        struct regulator_desc desc;
        struct regulator_dev *rdev;
        struct ab8500_ext_regulator_cfg *cfg;
-       bool is_enabled;
        u8 update_bank;
        u8 update_reg;
        u8 update_mask;
@@ -78,8 +76,6 @@ static int enable(struct ab8500_ext_regulator_info *info, u8 *regval)
                return ret;
        }
 
-       info->is_enabled = true;
-
        return ret;
 }
 
@@ -125,8 +121,6 @@ static int disable(struct ab8500_ext_regulator_info *info, u8 *regval)
                return ret;
        }
 
-       info->is_enabled = false;
-
        return ret;
 }
 
@@ -177,11 +171,9 @@ static int ab8500_ext_regulator_is_enabled(struct regulator_dev *rdev)
 
        if (((regval & info->update_mask) == info->update_val_lp) ||
            ((regval & info->update_mask) == info->update_val_hp))
-               info->is_enabled = true;
+               return 1;
        else
-               info->is_enabled = false;
-
-       return info->is_enabled;
+               return 0;
 }
 
 static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
@@ -207,7 +199,7 @@ static int ab8500_ext_regulator_set_mode(struct regulator_dev *rdev,
                return -EINVAL;
        }
 
-       if (info->is_enabled) {
+       if (ab8500_ext_regulator_is_enabled(rdev)) {
                u8 regval;
 
                ret = enable(info, &regval);