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Date: Thu, 06 Mar 2014 21:10:33 +0800
From: Axel Lin <axel.lin@...ics.com>
To: Chris Ball <chris@...ntf.net>, Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>
Cc: Balaji T K <balajitk@...com>,
Florian Vaussard <florian.vaussard@...l.ch>,
Stefan Roese <sr@...x.de>, linux-kernel@...r.kernel.org,
linux-mmc@...r.kernel.org
Subject: [PATCH RFT] regulator: pbias: Convert to use regmap helper functions
This patch converts this driver to use the regmap helper functions provided by
regulator core.
This fixes a few issues in current implementation:
1) In original code, the set voltage does not check max_uV,
which means if request max_uV < 1800000, it will still set the voltage
to 1800000.
2) The is_enable implementation is wrong in some cases:
e.g. for pbias_mmc_omap5: emable_mask is : BIT(27) | BIT(25) | BIT(26)
However, pbias_regulator_enable() only sets BIT(26) | BIT(22) bits.
So is_enable always return false in this case.
Signed-off-by: Axel Lin <axel.lin@...ics.com>
---
Hi Balaji,
I don't have this h/w, so please test if it works.
Regards,
Axel
drivers/regulator/pbias-regulator.c | 86 ++++++++++---------------------------
1 file changed, 23 insertions(+), 63 deletions(-)
diff --git a/drivers/regulator/pbias-regulator.c b/drivers/regulator/pbias-regulator.c
index ded3b35..f25c91e 100644
--- a/drivers/regulator/pbias-regulator.c
+++ b/drivers/regulator/pbias-regulator.c
@@ -38,85 +38,41 @@ struct pbias_reg_info {
struct pbias_regulator_data {
struct regulator_desc desc;
void __iomem *pbias_addr;
- unsigned int pbias_reg;
struct regulator_dev *dev;
struct regmap *syscon;
const struct pbias_reg_info *info;
int voltage;
};
-static int pbias_regulator_set_voltage(struct regulator_dev *dev,
- int min_uV, int max_uV, unsigned *selector)
+static int pbias_regulator_list_voltage(struct regulator_dev *rdev,
+ unsigned int selector)
{
- struct pbias_regulator_data *data = rdev_get_drvdata(dev);
- const struct pbias_reg_info *info = data->info;
- int ret, vmode;
-
- if (min_uV <= 1800000)
- vmode = 0;
- else if (min_uV > 1800000)
- vmode = info->vmode;
-
- ret = regmap_update_bits(data->syscon, data->pbias_reg,
- info->vmode, vmode);
-
- return ret;
-}
-
-static int pbias_regulator_get_voltage(struct regulator_dev *rdev)
-{
- struct pbias_regulator_data *data = rdev_get_drvdata(rdev);
- const struct pbias_reg_info *info = data->info;
- int value, voltage;
-
- regmap_read(data->syscon, data->pbias_reg, &value);
- value &= info->vmode;
-
- voltage = value ? 3000000 : 1800000;
-
- return voltage;
+ switch (selector) {
+ case 0:
+ return 1800000;
+ case 1:
+ return 3000000;
+ default:
+ return -EINVAL;
+ }
}
static int pbias_regulator_enable(struct regulator_dev *rdev)
{
struct pbias_regulator_data *data = rdev_get_drvdata(rdev);
const struct pbias_reg_info *info = data->info;
- int ret;
-
- ret = regmap_update_bits(data->syscon, data->pbias_reg,
- info->enable_mask, info->enable);
-
- return ret;
-}
-
-static int pbias_regulator_disable(struct regulator_dev *rdev)
-{
- struct pbias_regulator_data *data = rdev_get_drvdata(rdev);
- const struct pbias_reg_info *info = data->info;
- int ret;
-
- ret = regmap_update_bits(data->syscon, data->pbias_reg,
- info->enable_mask, 0);
- return ret;
-}
-
-static int pbias_regulator_is_enable(struct regulator_dev *rdev)
-{
- struct pbias_regulator_data *data = rdev_get_drvdata(rdev);
- const struct pbias_reg_info *info = data->info;
- int value;
-
- regmap_read(data->syscon, data->pbias_reg, &value);
- return (value & info->enable_mask) == info->enable_mask;
+ return regmap_update_bits(data->syscon, rdev->desc->enable_reg,
+ info->enable_mask, info->enable);
}
static struct regulator_ops pbias_regulator_voltage_ops = {
- .set_voltage = pbias_regulator_set_voltage,
- .get_voltage = pbias_regulator_get_voltage,
- .enable = pbias_regulator_enable,
- .disable = pbias_regulator_disable,
- .is_enabled = pbias_regulator_is_enable,
+ .list_voltage = pbias_regulator_list_voltage,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
+ .enable = pbias_regulator_enable,
+ .disable = regulator_disable_regmap,
+ .is_enabled = regulator_is_enabled_regmap,
};
static const struct pbias_reg_info pbias_mmc_omap2430 = {
@@ -192,6 +148,7 @@ static int pbias_regulator_probe(struct platform_device *pdev)
if (IS_ERR(syscon))
return PTR_ERR(syscon);
+ cfg.regmap = syscon;
cfg.dev = &pdev->dev;
for (idx = 0; idx < PBIAS_NUM_REGS && data_idx < count; idx++) {
@@ -207,7 +164,6 @@ static int pbias_regulator_probe(struct platform_device *pdev)
if (!res)
return -EINVAL;
- drvdata[data_idx].pbias_reg = res->start;
drvdata[data_idx].syscon = syscon;
drvdata[data_idx].info = info;
drvdata[data_idx].desc.name = info->name;
@@ -216,6 +172,10 @@ static int pbias_regulator_probe(struct platform_device *pdev)
drvdata[data_idx].desc.ops = &pbias_regulator_voltage_ops;
drvdata[data_idx].desc.n_voltages = 2;
drvdata[data_idx].desc.enable_time = info->enable_time;
+ drvdata[data_idx].desc.vsel_reg = res->start;
+ drvdata[data_idx].desc.vsel_mask = info->vmode;
+ drvdata[data_idx].desc.enable_reg = res->start;
+ drvdata[data_idx].desc.enable_mask = info->enable_mask;
cfg.init_data = pbias_matches[idx].init_data;
cfg.driver_data = &drvdata[data_idx];
--
1.8.1.2
--
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