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

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Message-ID: <20250112152651.30b343dd@jic23-huawei>
Date: Sun, 12 Jan 2025 15:26:51 +0000
From: Jonathan Cameron <jic23@...nel.org>
To: "Rob Herring (Arm)" <robh@...nel.org>
Cc: Lars-Peter Clausen <lars@...afoo.de>, Maxime Coquelin
 <mcoquelin.stm32@...il.com>, Alexandre Torgue
 <alexandre.torgue@...s.st.com>, Liam Girdwood <lgirdwood@...il.com>, Mark
 Brown <broonie@...nel.org>, linux-iio@...r.kernel.org,
 linux-stm32@...md-mailman.stormreply.com,
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] iio: adc: stm32: Drop unnecessary DT property presence
 check

On Thu,  9 Jan 2025 12:23:25 -0600
"Rob Herring (Arm)" <robh@...nel.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@...nel.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);