iio: adc: stm32: Drop unnecessary DT property presence check

[PATCH] iio: adc: stm32: Drop unnecessary DT property presence check

Posted by Rob Herring (Arm) 1 year ago

There's no reason to check for regulator supply property presence before
calling devm_regulator_get_optional() as that will return -ENODEV if
the supply is not present.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
---
The diff context doesn't show it, but the next line returns on error 
other than -ENODEV.

 drivers/iio/adc/stm32-adc-core.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
index 2201ee9987ae..0914148d1a22 100644
--- a/drivers/iio/adc/stm32-adc-core.c
+++ b/drivers/iio/adc/stm32-adc-core.c
@@ -615,8 +615,7 @@ static int stm32_adc_core_switches_probe(struct device *dev,
 	}
 
 	/* Booster can be used to supply analog switches (optional) */
-	if (priv->cfg->has_syscfg & HAS_VBOOSTER &&
-	    of_property_read_bool(np, "booster-supply")) {
+	if (priv->cfg->has_syscfg & HAS_VBOOSTER) {
 		priv->booster = devm_regulator_get_optional(dev, "booster");
 		if (IS_ERR(priv->booster)) {
 			ret = PTR_ERR(priv->booster);
@@ -628,8 +627,7 @@ static int stm32_adc_core_switches_probe(struct device *dev,
 	}
 
 	/* Vdd can be used to supply analog switches (optional) */
-	if (priv->cfg->has_syscfg & HAS_ANASWVDD &&
-	    of_property_read_bool(np, "vdd-supply")) {
+	if (priv->cfg->has_syscfg & HAS_ANASWVDD) {
 		priv->vdd = devm_regulator_get_optional(dev, "vdd");
 		if (IS_ERR(priv->vdd)) {
 			ret = PTR_ERR(priv->vdd);
-- 
2.45.2

Re: [PATCH] iio: adc: stm32: Drop unnecessary DT property presence check

Posted by Jonathan Cameron 1 year ago

On Thu,  9 Jan 2025 12:23:25 -0600
"Rob Herring (Arm)" <robh@kernel.org> wrote:

> There's no reason to check for regulator supply property presence before
> calling devm_regulator_get_optional() as that will return -ENODEV if
> the supply is not present.
> 
> Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
> ---
> The diff context doesn't show it, but the next line returns on error 
> other than -ENODEV.
Thanks for that. Saved me opening the file.

Applied to the testing branch of iio.git. Probably next cycle material now.

Jonathan

> 
>  drivers/iio/adc/stm32-adc-core.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
> index 2201ee9987ae..0914148d1a22 100644
> --- a/drivers/iio/adc/stm32-adc-core.c
> +++ b/drivers/iio/adc/stm32-adc-core.c
> @@ -615,8 +615,7 @@ static int stm32_adc_core_switches_probe(struct device *dev,
>  	}
>  
>  	/* Booster can be used to supply analog switches (optional) */
> -	if (priv->cfg->has_syscfg & HAS_VBOOSTER &&
> -	    of_property_read_bool(np, "booster-supply")) {
> +	if (priv->cfg->has_syscfg & HAS_VBOOSTER) {
>  		priv->booster = devm_regulator_get_optional(dev, "booster");
>  		if (IS_ERR(priv->booster)) {
>  			ret = PTR_ERR(priv->booster);
> @@ -628,8 +627,7 @@ static int stm32_adc_core_switches_probe(struct device *dev,
>  	}
>  
>  	/* Vdd can be used to supply analog switches (optional) */
> -	if (priv->cfg->has_syscfg & HAS_ANASWVDD &&
> -	    of_property_read_bool(np, "vdd-supply")) {
> +	if (priv->cfg->has_syscfg & HAS_ANASWVDD) {
>  		priv->vdd = devm_regulator_get_optional(dev, "vdd");
>  		if (IS_ERR(priv->vdd)) {
>  			ret = PTR_ERR(priv->vdd);

Re: [PATCH] iio: adc: stm32: Drop unnecessary DT property presence check

Posted by Fabrice Gasnier 1 year ago

On 1/9/25 19:23, Rob Herring (Arm) wrote:
> There's no reason to check for regulator supply property presence before
> calling devm_regulator_get_optional() as that will return -ENODEV if
> the supply is not present.
> 
> Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
> ---
> The diff context doesn't show it, but the next line returns on error 
> other than -ENODEV.

Hi Rob,

Tested on STM32MP157C-EV1,

Acked-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>
Tested-by: Fabrice Gasnier <fabrice.gasnier@foss.st.com>

Thanks & BR,
Fabrice

> 
>  drivers/iio/adc/stm32-adc-core.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
> index 2201ee9987ae..0914148d1a22 100644
> --- a/drivers/iio/adc/stm32-adc-core.c
> +++ b/drivers/iio/adc/stm32-adc-core.c
> @@ -615,8 +615,7 @@ static int stm32_adc_core_switches_probe(struct device *dev,
>  	}
>  
>  	/* Booster can be used to supply analog switches (optional) */
> -	if (priv->cfg->has_syscfg & HAS_VBOOSTER &&
> -	    of_property_read_bool(np, "booster-supply")) {
> +	if (priv->cfg->has_syscfg & HAS_VBOOSTER) {
>  		priv->booster = devm_regulator_get_optional(dev, "booster");
>  		if (IS_ERR(priv->booster)) {
>  			ret = PTR_ERR(priv->booster);
> @@ -628,8 +627,7 @@ static int stm32_adc_core_switches_probe(struct device *dev,
>  	}
>  
>  	/* Vdd can be used to supply analog switches (optional) */
> -	if (priv->cfg->has_syscfg & HAS_ANASWVDD &&
> -	    of_property_read_bool(np, "vdd-supply")) {
> +	if (priv->cfg->has_syscfg & HAS_ANASWVDD) {
>  		priv->vdd = devm_regulator_get_optional(dev, "vdd");
>  		if (IS_ERR(priv->vdd)) {
>  			ret = PTR_ERR(priv->vdd);