[PATCH 1/2] Staging: fbtft: Fix probing of gpio descriptor

[Jan Sebastian Götte]

I have tested these changes on an ili9486-based display connected through SPI to a raspberry pi and can confirm they work in combination with another patch I'll send shortly.

Regards, Jan

On July 11, 2019, 8:31 a.m., Phil Reid wrote:
> Conversion to use gpio descriptors broke all gpio lookups as
> devm_gpiod_get_index was converted to use dev->driver->name for
> the gpio name lookup. Fix this by using the name param. In
> addition gpiod_get post-fixes the -gpios to the name so that
> shouldn't be included in the call. However this then breaks the
> of_find_property call to see if the gpio entry exists as all
> fbtft treats all gpios as optional. So use devm_gpiod_get_index_optional
> instead which achieves the same thing and is simpler.
> 
> Nishad confirmed the changes where only ever compile tested.
> 
> Fixes: c440eee1a7a1 ("Staging: fbtft: Switch to the gpio descriptor interface")
> Signed-off-by: Phil Reid <preid at electromag.com.au>
> ---
>  drivers/staging/fbtft/fbtft-core.c | 39 ++++++++++++++++++--------------------
>  1 file changed, 18 insertions(+), 21 deletions(-)

Tested-by: Jan Sebastian Götte <linux at jaseg.net>