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Date: Sun, 07 Apr 2013 23:12:28 +0800
From: Axel Lin <axel.lin@...ics.com>
To: Mark Brown <broonie@...nsource.wolfsonmicro.com>
Cc: Bengt Jonsson <bengt.g.jonsson@...ricsson.com>,
Lee Jones <lee.jones@...aro.org>,
Yvan FILLION <yvan.fillion@...ricsson.com>,
Liam Girdwood <lgirdwood@...il.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] regulator: ab8500: Get rid of is_enabled from struct
ab8500_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.
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@...ics.com>
---
drivers/regulator/ab8500.c | 72 ++++++++++++++++++++------------------------
1 file changed, 32 insertions(+), 40 deletions(-)
diff --git a/drivers/regulator/ab8500.c b/drivers/regulator/ab8500.c
index 517305e..9ebd131 100644
--- a/drivers/regulator/ab8500.c
+++ b/drivers/regulator/ab8500.c
@@ -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, ®val);
+ 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, ®val);
- 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;
--
1.7.10.4
--
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