linux-kernel - Re: [PATCH] mmc: Use of_property_present() for non-boolean properties

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Message-ID: <333a5a4c-06d2-4465-af28-3dac607190b1@intel.com>
Date: Fri, 8 Nov 2024 10:46:32 +0200
From: Adrian Hunter <adrian.hunter@...el.com>
To: "Rob Herring (Arm)" <robh@...nel.org>,
 Ulf Hansson <ulf.hansson@...aro.org>, Haibo Chen <haibo.chen@....com>,
 Shawn Guo <shawnguo@...nel.org>, Sascha Hauer <s.hauer@...gutronix.de>,
 Pengutronix Kernel Team <kernel@...gutronix.de>,
 Fabio Estevam <festevam@...il.com>
Cc: linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
 imx@...ts.linux.dev, s32@....com, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] mmc: Use of_property_present() for non-boolean properties

On 4/11/24 21:07, Rob Herring (Arm) wrote:
> The use of of_property_read_bool() for non-boolean properties is
> deprecated in favor of of_property_present() when testing for property
> presence.
> 
> Signed-off-by: Rob Herring (Arm) <robh@...nel.org>

No longer applies cleanly to mmc next, and one minor comment
below otherwise:

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
>  drivers/mmc/host/mxcmmc.c          | 6 +++---
>  drivers/mmc/host/sdhci-esdhc-imx.c | 2 +-
>  2 files changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/mmc/host/mxcmmc.c b/drivers/mmc/host/mxcmmc.c
> index 1edf65291354..dcb1a7336029 100644
> --- a/drivers/mmc/host/mxcmmc.c
> +++ b/drivers/mmc/host/mxcmmc.c
> @@ -1048,9 +1048,9 @@ static int mxcmci_probe(struct platform_device *pdev)
>  
>  	if (pdata)
>  		dat3_card_detect = pdata->dat3_card_detect;
> -	else if (mmc_card_is_removable(mmc)
> -			&& !of_property_read_bool(pdev->dev.of_node, "cd-gpios"))
> -		dat3_card_detect = true;
> +	else
> +		dat3_card_detect = mmc_card_is_removable(mmc) &&
> +			!of_property_present(pdev->dev.of_node, "cd-gpios");

dat3_card_detect no longer needs to be initialized to false

>  
>  	ret = mmc_regulator_get_supply(mmc);
>  	if (ret)
> diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
> index 8f0bc6dca2b0..cda1872769e0 100644
> --- a/drivers/mmc/host/sdhci-esdhc-imx.c
> +++ b/drivers/mmc/host/sdhci-esdhc-imx.c
> @@ -1629,7 +1629,7 @@ sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
>  	 * Retrieveing and requesting the actual WP GPIO will happen
>  	 * in the call to mmc_of_parse().
>  	 */
> -	if (of_property_read_bool(np, "wp-gpios"))
> +	if (of_property_present(np, "wp-gpios"))
>  		boarddata->wp_type = ESDHC_WP_GPIO;
>  
>  	of_property_read_u32(np, "fsl,tuning-step", &boarddata->tuning_step);