[PATCH v3 2/2] gpio: search for gpio label if gpio is not found through bank name

[Simon Glass]

On Tue, 4 Feb 2020 at 23:21, Heiko Schocher <hs at denx.de> wrote:
>
> dm_gpio_lookup_name() searches for a gpio through
> the bank name. But we have also gpio labels, and it
> makes sense to search for a gpio also in the labels
> we have defined, if no gpio is found through the
> bank name definition.
>
> This is useful for example if you have a wp pin on
> different gpios on different board versions.
>
> If dm_gpio_lookup_name() searches also for the gpio labels,
> you can give the gpio an unique label name and search
> for this label, and do not need to differ between
> board revisions.
>
> Signed-off-by: Heiko Schocher <hs at denx.de>
> ---
>
> Example on the aristainetos board:
>
> => gpio clear wp_spi_nor.gpio-hog
> gpio: pin wp_spi_nor.gpio-hog (gpio 47) value is 0
> =>
>
> before this patch, you need to know where your
> pin is:
>
> => gpio clear GPIO2_15
> gpio: pin GPIO2_15 (gpio 47) value is 0
> =>
>
> travis build:
>
> Changes in v3:
> - add comment from Simon Glass
>   make this new function configurable through Kconfig
>   option DM_GPIO_LOOKUP_LABEL
>
> Changes in v2:
> - add comment from Simon Glass
>   move code into seperate function dm_gpio_lookup_label()
>   add test if dm_gpio_lookup_label() works
>
>  drivers/gpio/Kconfig       | 22 ++++++++++++++++++
>  drivers/gpio/gpio-uclass.c | 47 ++++++++++++++++++++++++++++++++++++++
>  test/dm/gpio.c             |  7 ++++++
>  3 files changed, 76 insertions(+)

Reviewed-by: Simon Glass <sjg at chromium.org>