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regulator: ab8500: Get rid of is_enabled from struct ab8500_regulator_info

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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.

This patch also moves ab8500_regulator_is_enabled() close to
ab8500_regulator_[en|dis]able functions.
This is required to avoid a forward declaration because now we call
ab8500_regulator_is_enabled() in ab8500_regulator_set_mode().
This change also makes the code better in readability by moving similar
functions to one place.

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>
This commit is contained in:
Axel Lin 2013-04-07 23:12:28 +08:00 committed by Mark Brown
parent cd2a55d2eb
commit 438e695b87
1 changed files with 32 additions and 40 deletions
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72
drivers/regulator/ab8500.c
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@ -46,7 +46,6 @@ struct ab8500_shared_mode {
* @desc: regulator description
* @regulator_dev: regulator device
* @shared_mode: used when mode is shared between two regulators
* @is_enabled: status of regulator (on/off)
* @load_lp_uA: maximum load in idle (low power) mode
* @update_bank: bank to control on/off
* @update_reg: register to control on/off
@ -69,7 +68,6 @@ struct ab8500_regulator_info {
struct regulator_desc desc;
struct regulator_dev *regulator;
struct ab8500_shared_mode *shared_mode;
bool is_enabled;
int load_lp_uA;
u8 update_bank;
u8 update_reg;
@ -259,8 +257,6 @@ static int ab8500_regulator_enable(struct regulator_dev *rdev)
return ret;
}
info->is_enabled = true;
dev_vdbg(rdev_get_dev(rdev),
"%s-enable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
info->desc.name, info->update_bank, info->update_reg,
@ -288,8 +284,6 @@ static int ab8500_regulator_disable(struct regulator_dev *rdev)
return ret;
}
info->is_enabled = false;
dev_vdbg(rdev_get_dev(rdev),
"%s-disable (bank, reg, mask, value): 0x%x, 0x%x, 0x%x, 0x%x\n",
info->desc.name, info->update_bank, info->update_reg,
@ -298,6 +292,37 @@ static int ab8500_regulator_disable(struct regulator_dev *rdev)
return ret;
}
static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
{
int ret;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
u8 regval;
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
ret = abx500_get_register_interruptible(info->dev,
info->update_bank, info->update_reg, &regval);
if (ret < 0) {
dev_err(rdev_get_dev(rdev),
"couldn't read 0x%x register\n", info->update_reg);
return ret;
}
dev_vdbg(rdev_get_dev(rdev),
"%s-is_enabled (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
" 0x%x\n",
info->desc.name, info->update_bank, info->update_reg,
info->update_mask, regval);
if (regval & info->update_mask)
return 1;
else
return 0;
}
static unsigned int ab8500_regulator_get_optimum_mode(
struct regulator_dev *rdev, int input_uV,
int output_uV, int load_uA)
@ -398,7 +423,7 @@ static int ab8500_regulator_set_mode(struct regulator_dev *rdev,
mask = info->update_mask;
}
if (info->is_enabled || dmr) {
if (dmr || ab8500_regulator_is_enabled(rdev)) {
ret = abx500_mask_and_set_register_interruptible(info->dev,
bank, reg, mask, val);
if (ret < 0)
@ -464,39 +489,6 @@ static unsigned int ab8500_regulator_get_mode(struct regulator_dev *rdev)
return ret;
}
static int ab8500_regulator_is_enabled(struct regulator_dev *rdev)
{
int ret;
struct ab8500_regulator_info *info = rdev_get_drvdata(rdev);
u8 regval;
if (info == NULL) {
dev_err(rdev_get_dev(rdev), "regulator info null pointer\n");
return -EINVAL;
}
ret = abx500_get_register_interruptible(info->dev,
info->update_bank, info->update_reg, &regval);
if (ret < 0) {
dev_err(rdev_get_dev(rdev),
"couldn't read 0x%x register\n", info->update_reg);
return ret;
}
dev_vdbg(rdev_get_dev(rdev),
"%s-is_enabled (bank, reg, mask, value): 0x%x, 0x%x, 0x%x,"
" 0x%x\n",
info->desc.name, info->update_bank, info->update_reg,
info->update_mask, regval);
if (regval & info->update_mask)
info->is_enabled = true;
else
info->is_enabled = false;
return info->is_enabled;
}
static int ab8500_regulator_get_voltage_sel(struct regulator_dev *rdev)
{
int ret, val;