Re: [PATCH v12 3/6] pinctrl: core: Make pin group callbacks optional for pin-only drivers

[sashiko-bot@kernel.org]

> Currently, the pinctrl core strictly requires all drivers to implement
> .get_groups_count and .get_group_name callbacks in their pinctrl_ops.
> 
> However, for simple pinctrl drivers that act purely as GPIO controllers
> and pin-specific configuration proxies, without any concept of muxing or
> pin groups, this strict requirement forces the implementation of dummy
> callbacks just to satisfy pinctrl_check_ops().
> 
> Relax this requirement for pin-only drivers by making the group callbacks
> optional when no muxing or group pin configuration support is provided.
> Update the core and debugfs helpers to check for the existence of these
> callbacks before invoking them.
> 
> Drivers that provide muxing or group pin configuration operations still
> must implement group enumeration and naming callbacks, and are rejected
> at registration time if they do not.
> 
> Suggested-by: Linus Walleij <linusw@kernel.org>
> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>

Reviewed-by: Sashiko <sashiko-bot@kernel.org>