diff mbox series

[v3,4/6] pinctrl: meson: Rework enable/disable bias part

Message ID 20190507115726.23714-5-glaroque@baylibre.com
State New
Headers show
Series Add drive-strength in Meson pinctrl driver | expand

Commit Message

Guillaume LA ROQUE May 7, 2019, 11:57 a.m. UTC 
rework bias enable/disable part to prepare drive-strength integration

Signed-off-by: Guillaume La Roque <glaroque@baylibre.com>
---
 drivers/pinctrl/meson/pinctrl-meson.c | 79 ++++++++++++++++-----------
 1 file changed, 48 insertions(+), 31 deletions(-)

Comments

Martin Blumenstingl May 7, 2019, 5:53 p.m. UTC | #1 
Hi Guillaume,

On Tue, May 7, 2019 at 1:57 PM Guillaume La Roque <glaroque@baylibre.com> wrote:
>
> rework bias enable/disable part to prepare drive-strength integration
if it was my patch I would add "no functional changes" at the end to
make it explicit that this only changes the structure of the code.

>
> Signed-off-by: Guillaume La Roque <glaroque@baylibre.com>
with the minor comments from below addressed:
Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>

> ---
>  drivers/pinctrl/meson/pinctrl-meson.c | 79 ++++++++++++++++-----------
>  1 file changed, 48 insertions(+), 31 deletions(-)
>
> diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c
> index 96a4a72708e4..a216a7537564 100644
> --- a/drivers/pinctrl/meson/pinctrl-meson.c
> +++ b/drivers/pinctrl/meson/pinctrl-meson.c
> @@ -174,13 +174,57 @@ int meson_pmx_get_groups(struct pinctrl_dev *pcdev, unsigned selector,
>         return 0;
>  }
>
> +static int meson_pinconf_disable_bias(struct meson_pinctrl *pc,
> +                                     unsigned int pin)
> +{
> +       struct meson_bank *bank;
> +       unsigned int reg, bit = 0;
> +       int ret;
> +
> +       ret = meson_get_bank(pc, pin, &bank);
> +       if (ret)
> +               return ret;
add an empty line here to keep it consistent with the rest of the code

[...]
>  static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
>                              unsigned long *configs, unsigned num_configs)
>  {
>         struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
>         struct meson_bank *bank;
bank is not read anymore (it's passed to meson_get_bank to set it, but
then it's not read, which is probably why my compiler doesn't
complain)

>         enum pin_config_param param;
> -       unsigned int reg, bit;
>         int i, ret;
>
>         ret = meson_get_bank(pc, pin, &bank);
> @@ -192,44 +236,17 @@ static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
>
>                 switch (param) {
>                 case PIN_CONFIG_BIAS_DISABLE:
> -                       dev_dbg(pc->dev, "pin %u: disable bias\n", pin);
> -
> -                       meson_calc_reg_and_bit(bank, pin, REG_PULLEN, &reg,
> -                                              &bit);
> -                       ret = regmap_update_bits(pc->reg_pullen, reg,
> -                                                BIT(bit), 0);
> +                       ret = meson_pinconf_disable_bias(pc, pin);
>                         if (ret)
>                                 return ret;
>                         break;
>                 case PIN_CONFIG_BIAS_PULL_UP:
> -                       dev_dbg(pc->dev, "pin %u: enable pull-up\n", pin);
> -
> -                       meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
> -                                              &reg, &bit);
> -                       ret = regmap_update_bits(pc->reg_pullen, reg,
> -                                                BIT(bit), BIT(bit));
> -                       if (ret)
> -                               return ret;
> -
> -                       meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
> -                       ret = regmap_update_bits(pc->reg_pull, reg,
> -                                                BIT(bit), BIT(bit));
> +                       ret = meson_pinconf_enable_bias(pc, pin, 1);
use "true" instead of "1"?

>                         if (ret)
>                                 return ret;
>                         break;
>                 case PIN_CONFIG_BIAS_PULL_DOWN:
> -                       dev_dbg(pc->dev, "pin %u: enable pull-down\n", pin);
> -
> -                       meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
> -                                              &reg, &bit);
> -                       ret = regmap_update_bits(pc->reg_pullen, reg,
> -                                                BIT(bit), BIT(bit));
> -                       if (ret)
> -                               return ret;
> -
> -                       meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
> -                       ret = regmap_update_bits(pc->reg_pull, reg,
> -                                                BIT(bit), 0);
> +                       ret = meson_pinconf_enable_bias(pc, pin, 0);
use "false" instead of "0"?

one overall comment: thank you for working on this!
in my opinion it's a good preparation step to ensure that
meson_pinconf_set is easy to understand even if we add more
functionality here


Regards
Martin
Guillaume LA ROQUE May 9, 2019, 11:25 a.m. UTC | #2 
hi Martin,

same as previous patch i will do a new serie with your comments.


On 5/7/19 7:53 PM, Martin Blumenstingl wrote:
> Hi Guillaume,
>
> On Tue, May 7, 2019 at 1:57 PM Guillaume La Roque <glaroque@baylibre.com> wrote:
>> rework bias enable/disable part to prepare drive-strength integration
> if it was my patch I would add "no functional changes" at the end to
> make it explicit that this only changes the structure of the code.
>
>> Signed-off-by: Guillaume La Roque <glaroque@baylibre.com>
> with the minor comments from below addressed:
> Reviewed-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
>
>> ---
>>  drivers/pinctrl/meson/pinctrl-meson.c | 79 ++++++++++++++++-----------
>>  1 file changed, 48 insertions(+), 31 deletions(-)
>>
>> diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c
>> index 96a4a72708e4..a216a7537564 100644
>> --- a/drivers/pinctrl/meson/pinctrl-meson.c
>> +++ b/drivers/pinctrl/meson/pinctrl-meson.c
>> @@ -174,13 +174,57 @@ int meson_pmx_get_groups(struct pinctrl_dev *pcdev, unsigned selector,
>>         return 0;
>>  }
>>
>> +static int meson_pinconf_disable_bias(struct meson_pinctrl *pc,
>> +                                     unsigned int pin)
>> +{
>> +       struct meson_bank *bank;
>> +       unsigned int reg, bit = 0;
>> +       int ret;
>> +
>> +       ret = meson_get_bank(pc, pin, &bank);
>> +       if (ret)
>> +               return ret;
> add an empty line here to keep it consistent with the rest of the code
>
> [...]
>>  static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
>>                              unsigned long *configs, unsigned num_configs)
>>  {
>>         struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
>>         struct meson_bank *bank;
> bank is not read anymore (it's passed to meson_get_bank to set it, but
> then it's not read, which is probably why my compiler doesn't
> complain)
>
>>         enum pin_config_param param;
>> -       unsigned int reg, bit;
>>         int i, ret;
>>
>>         ret = meson_get_bank(pc, pin, &bank);
>> @@ -192,44 +236,17 @@ static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
>>
>>                 switch (param) {
>>                 case PIN_CONFIG_BIAS_DISABLE:
>> -                       dev_dbg(pc->dev, "pin %u: disable bias\n", pin);
>> -
>> -                       meson_calc_reg_and_bit(bank, pin, REG_PULLEN, &reg,
>> -                                              &bit);
>> -                       ret = regmap_update_bits(pc->reg_pullen, reg,
>> -                                                BIT(bit), 0);
>> +                       ret = meson_pinconf_disable_bias(pc, pin);
>>                         if (ret)
>>                                 return ret;
>>                         break;
>>                 case PIN_CONFIG_BIAS_PULL_UP:
>> -                       dev_dbg(pc->dev, "pin %u: enable pull-up\n", pin);
>> -
>> -                       meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
>> -                                              &reg, &bit);
>> -                       ret = regmap_update_bits(pc->reg_pullen, reg,
>> -                                                BIT(bit), BIT(bit));
>> -                       if (ret)
>> -                               return ret;
>> -
>> -                       meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
>> -                       ret = regmap_update_bits(pc->reg_pull, reg,
>> -                                                BIT(bit), BIT(bit));
>> +                       ret = meson_pinconf_enable_bias(pc, pin, 1);
> use "true" instead of "1"?
>
>>                         if (ret)
>>                                 return ret;
>>                         break;
>>                 case PIN_CONFIG_BIAS_PULL_DOWN:
>> -                       dev_dbg(pc->dev, "pin %u: enable pull-down\n", pin);
>> -
>> -                       meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
>> -                                              &reg, &bit);
>> -                       ret = regmap_update_bits(pc->reg_pullen, reg,
>> -                                                BIT(bit), BIT(bit));
>> -                       if (ret)
>> -                               return ret;
>> -
>> -                       meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
>> -                       ret = regmap_update_bits(pc->reg_pull, reg,
>> -                                                BIT(bit), 0);
>> +                       ret = meson_pinconf_enable_bias(pc, pin, 0);
> use "false" instead of "0"?
>
> one overall comment: thank you for working on this!
> in my opinion it's a good preparation step to ensure that
> meson_pinconf_set is easy to understand even if we add more
> functionality here
>
>
> Regards
> Martin


guillaume
diff mbox series

Patch

diff --git a/drivers/pinctrl/meson/pinctrl-meson.c b/drivers/pinctrl/meson/pinctrl-meson.c
index 96a4a72708e4..a216a7537564 100644
--- a/drivers/pinctrl/meson/pinctrl-meson.c
+++ b/drivers/pinctrl/meson/pinctrl-meson.c
@@ -174,13 +174,57 @@  int meson_pmx_get_groups(struct pinctrl_dev *pcdev, unsigned selector,
 	return 0;
 }
 
+static int meson_pinconf_disable_bias(struct meson_pinctrl *pc,
+				      unsigned int pin)
+{
+	struct meson_bank *bank;
+	unsigned int reg, bit = 0;
+	int ret;
+
+	ret = meson_get_bank(pc, pin, &bank);
+	if (ret)
+		return ret;
+	meson_calc_reg_and_bit(bank, pin, REG_PULLEN, &reg, &bit);
+	ret = regmap_update_bits(pc->reg_pullen, reg, BIT(bit), 0);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int meson_pinconf_enable_bias(struct meson_pinctrl *pc, unsigned int pin,
+				     bool pull_up)
+{
+	struct meson_bank *bank;
+	unsigned int reg, bit, val = 0;
+	int ret;
+
+	ret = meson_get_bank(pc, pin, &bank);
+	if (ret)
+		return ret;
+
+	meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
+	if (pull_up)
+		val = BIT(bit);
+
+	ret = regmap_update_bits(pc->reg_pull, reg, BIT(bit), val);
+	if (ret)
+		return ret;
+
+	meson_calc_reg_and_bit(bank, pin, REG_PULLEN, &reg, &bit);
+	ret = regmap_update_bits(pc->reg_pullen, reg, BIT(bit),	BIT(bit));
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
 static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
 			     unsigned long *configs, unsigned num_configs)
 {
 	struct meson_pinctrl *pc = pinctrl_dev_get_drvdata(pcdev);
 	struct meson_bank *bank;
 	enum pin_config_param param;
-	unsigned int reg, bit;
 	int i, ret;
 
 	ret = meson_get_bank(pc, pin, &bank);
@@ -192,44 +236,17 @@  static int meson_pinconf_set(struct pinctrl_dev *pcdev, unsigned int pin,
 
 		switch (param) {
 		case PIN_CONFIG_BIAS_DISABLE:
-			dev_dbg(pc->dev, "pin %u: disable bias\n", pin);
-
-			meson_calc_reg_and_bit(bank, pin, REG_PULLEN, &reg,
-					       &bit);
-			ret = regmap_update_bits(pc->reg_pullen, reg,
-						 BIT(bit), 0);
+			ret = meson_pinconf_disable_bias(pc, pin);
 			if (ret)
 				return ret;
 			break;
 		case PIN_CONFIG_BIAS_PULL_UP:
-			dev_dbg(pc->dev, "pin %u: enable pull-up\n", pin);
-
-			meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
-					       &reg, &bit);
-			ret = regmap_update_bits(pc->reg_pullen, reg,
-						 BIT(bit), BIT(bit));
-			if (ret)
-				return ret;
-
-			meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
-			ret = regmap_update_bits(pc->reg_pull, reg,
-						 BIT(bit), BIT(bit));
+			ret = meson_pinconf_enable_bias(pc, pin, 1);
 			if (ret)
 				return ret;
 			break;
 		case PIN_CONFIG_BIAS_PULL_DOWN:
-			dev_dbg(pc->dev, "pin %u: enable pull-down\n", pin);
-
-			meson_calc_reg_and_bit(bank, pin, REG_PULLEN,
-					       &reg, &bit);
-			ret = regmap_update_bits(pc->reg_pullen, reg,
-						 BIT(bit), BIT(bit));
-			if (ret)
-				return ret;
-
-			meson_calc_reg_and_bit(bank, pin, REG_PULL, &reg, &bit);
-			ret = regmap_update_bits(pc->reg_pull, reg,
-						 BIT(bit), 0);
+			ret = meson_pinconf_enable_bias(pc, pin, 0);
 			if (ret)
 				return ret;
 			break;