[PATCH v2 1/2] regulator: pbias: Fix is_enabled callback implementation

[PATCH v2 1/2] regulator: pbias: Fix is_enabled callback implementation

[Axel Lin]

The is_enabled implementation is wrong in some cases:
e.g. for pbias_mmc_omap5: enable_mask is : BIT(27) | BIT(25) | BIT(26)
However, pbias_regulator_enable() only sets BIT(27) | BIT(26) bits.
So is_enabled callback will always return false in this case.
Fix the logic to compare the register value with info->enable rather than
info->enable_mask.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Balaji T K <balajitk@ti.com>
---
v2: Update commit log and add Balaji's Ack.

 drivers/regulator/pbias-regulator.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/regulator/pbias-regulator.c b/drivers/regulator/pbias-regulator.c
index ded3b35..d89a1d8 100644
--- a/drivers/regulator/pbias-regulator.c
+++ b/drivers/regulator/pbias-regulator.c
@@ -108,7 +108,7 @@ static int pbias_regulator_is_enable(struct regulator_dev *rdev)
 
 	regmap_read(data->syscon, data->pbias_reg, &value);
 
-	return (value & info->enable_mask) == info->enable_mask;
+	return (value & info->enable_mask) == info->enable;
 }
 
 static struct regulator_ops pbias_regulator_voltage_ops = {
-- 
1.8.1.2

[PATCH v2 2/2] regulator: pbias: Convert to use regmap helper functions

[Axel Lin]

This patch converts this driver to use the regmap helper functions provided by
regulator core.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Balaji T K <balajitk@ti.com>
---
v2: Add Balaji's Ack.

 drivers/regulator/pbias-regulator.c | 74 ++++++++++---------------------------
 1 file changed, 19 insertions(+), 55 deletions(-)

diff --git a/drivers/regulator/pbias-regulator.c b/drivers/regulator/pbias-regulator.c
index d89a1d8..6d38be3 100644
--- a/drivers/regulator/pbias-regulator.c
+++ b/drivers/regulator/pbias-regulator.c
@@ -38,66 +38,24 @@ 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)
-{
-	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;
-}
+static const unsigned int pbias_volt_table[] = {
+	1800000,
+	3000000
+};
 
 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;
+	return regmap_update_bits(data->syscon, rdev->desc->enable_reg,
+				  info->enable_mask, info->enable);
 }
 
 static int pbias_regulator_is_enable(struct regulator_dev *rdev)
@@ -106,17 +64,18 @@ static int pbias_regulator_is_enable(struct regulator_dev *rdev)
 	const struct pbias_reg_info *info = data->info;
 	int value;
 
-	regmap_read(data->syscon, data->pbias_reg, &value);
+	regmap_read(data->syscon, rdev->desc->enable_reg, &value);
 
 	return (value & 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 = regulator_list_voltage_table,
+	.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 = pbias_regulator_is_enable,
 };
 
 static const struct pbias_reg_info pbias_mmc_omap2430 = {
@@ -192,6 +151,7 @@ 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++) {
@@ -207,15 +167,19 @@ 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;
 		drvdata[data_idx].desc.owner = THIS_MODULE;
 		drvdata[data_idx].desc.type = REGULATOR_VOLTAGE;
 		drvdata[data_idx].desc.ops = &pbias_regulator_voltage_ops;
+		drvdata[data_idx].desc.volt_table = pbias_volt_table;
 		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

Re: [PATCH v2 1/2] regulator: pbias: Fix is_enabled callback implementation

[Axel Lin]

2014-03-08 11:55 GMT+08:00 Axel Lin <axel.lin@ingics.com>:
> The is_enabled implementation is wrong in some cases:
> e.g. for pbias_mmc_omap5: enable_mask is : BIT(27) | BIT(25) | BIT(26)
> However, pbias_regulator_enable() only sets BIT(27) | BIT(26) bits.
> So is_enabled callback will always return false in this case.
> Fix the logic to compare the register value with info->enable rather than
> info->enable_mask.
>

Hi Chris,
Would you pick up this patch serial?

Regards,
Axel

Re: [PATCH v2 1/2] regulator: pbias: Fix is_enabled callback implementation

[Axel Lin]

2014-04-02 8:26 GMT+08:00 Axel Lin <axel.lin@ingics.com>:
> 2014-03-08 11:55 GMT+08:00 Axel Lin <axel.lin@ingics.com>:
>> The is_enabled implementation is wrong in some cases:
>> e.g. for pbias_mmc_omap5: enable_mask is : BIT(27) | BIT(25) | BIT(26)
>> However, pbias_regulator_enable() only sets BIT(27) | BIT(26) bits.
>> So is_enabled callback will always return false in this case.
>> Fix the logic to compare the register value with info->enable rather than
>> info->enable_mask.
>>
>
> Hi Chris,
> Would you pick up this patch serial?

I just found Chris sent a pull request for 3.15-rc1.
So I'll resend this serial to Mark after 3.15-rc1 is out.

>
> Regards,
> Axel

Re: [PATCH v2 1/2] regulator: pbias: Fix is_enabled callback implementation

[Mark Brown]

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On Wed, Apr 09, 2014 at 05:50:42PM +0800, Axel Lin wrote:

> I just found Chris sent a pull request for 3.15-rc1.
> So I'll resend this serial to Mark after 3.15-rc1 is out.

I still have it, I'll go through after -rc1.  I was also kind of hoping
for some review from people working on the driver but oh well.

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Re: [PATCH v2 1/2] regulator: pbias: Fix is_enabled callback implementation

[Mark Brown]

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On Sat, Mar 08, 2014 at 11:55:29AM +0800, Axel Lin wrote:
> The is_enabled implementation is wrong in some cases:
> e.g. for pbias_mmc_omap5: enable_mask is : BIT(27) | BIT(25) | BIT(26)
> However, pbias_regulator_enable() only sets BIT(27) | BIT(26) bits.
> So is_enabled callback will always return false in this case.
> Fix the logic to compare the register value with info->enable rather than
> info->enable_mask.

Applied both, thanks.

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Re: [PATCH v2 1/2] regulator: pbias: Fix is_enabled callback implementation

[Axel Lin]

2014-04-15 5:16 GMT+08:00 Mark Brown <broonie@kernel.org>:
> On Sat, Mar 08, 2014 at 11:55:29AM +0800, Axel Lin wrote:
>> The is_enabled implementation is wrong in some cases:
>> e.g. for pbias_mmc_omap5: enable_mask is : BIT(27) | BIT(25) | BIT(26)
>> However, pbias_regulator_enable() only sets BIT(27) | BIT(26) bits.
>> So is_enabled callback will always return false in this case.
>> Fix the logic to compare the register value with info->enable rather than
>> info->enable_mask.
>
> Applied both, thanks.

Hi Mark,
Currently these 2 commits are in topic/pbias branch.

I think commit 1cb7b43f6796
"regulator: pbias: Fix is_enabled callback implementation"
is a bug fix for 3.15.

commit 60e8c1e34d3a
"regulator: pbias: Convert to use regmap helper functions"
might also required for 3.15.
The reason is this commit implements .list_voltage and the mmc core calls
regulator_list_voltage() in mmc_regulator_get_ocrmask().

Regards,
Axel

Re: [PATCH v2 1/2] regulator: pbias: Fix is_enabled callback implementation

[Mark Brown]

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On Tue, Apr 15, 2014 at 11:14:13PM +0800, Axel Lin wrote:

> commit 60e8c1e34d3a
> "regulator: pbias: Convert to use regmap helper functions"
> might also required for 3.15.
> The reason is this commit implements .list_voltage and the mmc core calls
> regulator_list_voltage() in mmc_regulator_get_ocrmask().

Makes sense, yes.

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