[PATCH v5 003/111] pwm: Provide a macro to get the parent device of a given chip

[AngeloGioacchino Del Regno]

Il 25/01/24 13:08, Uwe Kleine-König ha scritto:
> Currently a pwm_chip stores in its struct device *dev member a pointer
> to the parent device. Preparing a change that embeds a full struct
> device in struct pwm_chip, this accessor macro should be used in all
> drivers directly accessing chip->dev now. This way struct pwm_chip and
> this macro can be changed without having to touch all drivers in the
> same change set.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig at pengutronix.de>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>

> ---
>   include/linux/pwm.h | 5 +++++
>   1 file changed, 5 insertions(+)
> 
> diff --git a/include/linux/pwm.h b/include/linux/pwm.h
> index 8ffe9ae7a23a..d7966918f301 100644
> --- a/include/linux/pwm.h
> +++ b/include/linux/pwm.h
> @@ -289,6 +289,11 @@ struct pwm_chip {
>   	struct pwm_device *pwms;
>   };
>   
> +static inline struct device *pwmchip_parent(struct pwm_chip *chip)
> +{
> +	return chip->dev;
> +}
> +
>   #if IS_ENABLED(CONFIG_PWM)
>   /* PWM user APIs */
>   int pwm_apply_might_sleep(struct pwm_device *pwm, const struct pwm_state *state);