Re: [PATCH v11 5/7] i2c: of-prober: Add GPIO support to simple helpers

AngeloGioacchino Del Regno
2024-11-14T10:37:02Z

Il 06/11/24 10:33, Chen-Yu Tsai ha scritto:
> Add GPIO support to the simple helpers for the I2C OF component prober.
> Components that the prober intends to probe likely require their
> regulator supplies be enabled, and GPIOs be toggled to enable them or
> bring them out of reset before they will respond to probe attempts.
> Regulator supplies were handled in the previous patch.
>
> The assumption is that the same class of components to be probed are
> always connected in the same fashion with the same regulator supply
> and GPIO. The names may vary due to binding differences, but the
> physical layout does not change.
>
> This supports at most one GPIO pin. The user must specify the GPIO name,
> the polarity, and the amount of time to wait after the GPIO is toggled.
> Devices with more than one GPIO pin likely require specific power
> sequencing beyond what generic code can easily support.
>
> Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
> Reviewed-by: Douglas Anderson <dianders@chromium.org>
> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

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