linux-kernel - Re: [PATCH v2 1/2] hwmon: gpio-fan: drop of_match

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Date:   Sun, 12 Mar 2023 14:12:37 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Cc:     Jean Delvare <jdelvare@...e.com>,
        Eric Tremblay <etremblay@...tech-controls.com>,
        linux-hwmon@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] hwmon: gpio-fan: drop of_match_ptr for ID table

On Sun, Mar 12, 2023 at 08:37:22PM +0100, Krzysztof Kozlowski wrote:
> The driver can match only via the DT table so the table should be always
> used and the of_match_ptr does not have any sense (this also allows ACPI
> matching via PRP0001, even though it might not be relevant here).  This
> also fixes !CONFIG_OF error:
> 
>   drivers/hwmon/gpio-fan.c:484:34: error: ‘of_gpio_fan_match’ defined but not used [-Werror=unused-const-variable=]
> 
> Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Applied, though I added a note describing that the above build error can
only be seen if the OF -> GPIO_OF dependency is broken.

Thanks,
Guenter

> ---
> 
> Changes since v1:
> 1. Rework patch and commit msg - drop of_match_ptr.
> ---
>  drivers/hwmon/gpio-fan.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/hwmon/gpio-fan.c b/drivers/hwmon/gpio-fan.c
> index e75db6f64e8c..d92c536be9af 100644
> --- a/drivers/hwmon/gpio-fan.c
> +++ b/drivers/hwmon/gpio-fan.c
> @@ -586,7 +586,7 @@ static struct platform_driver gpio_fan_driver = {
>  	.driver	= {
>  		.name	= "gpio-fan",
>  		.pm	= pm_sleep_ptr(&gpio_fan_pm),
> -		.of_match_table = of_match_ptr(of_gpio_fan_match),
> +		.of_match_table = of_gpio_fan_match,
>  	},
>  };
>