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/openbmc/linux/drivers/gpu/drm/msm/dsi/ |
H A D | dsi_host.c | 9590e69d Wed May 20 02:21:41 CDT 2015 Uwe Kleine-König <u.kleine-koenig@pengutronix.de> drm/msm: use devm_gpiod_get_optional for optional reset gpio
Since 39b2bbe3d715 (gpio: add flags argument to gpiod_get*() functions) which appeared in v3.17-rc1, the gpiod_get* functions take an additional parameter that allows to specify direction and initial value for output.
Also there is a variant to find optional gpios that returns NULL if there is no gpio instead of -ENOENT.
Make use of both features to simplify the driver.
This makes error checking more strict because errors like -ENOSYS ("no gpio support compiled in") or -EPROBE_DEFER ("gpio not ready yet") are handled correctly now.
Furthermore this is one caller less that stops us making the flags argument to gpiod_get*() mandatory.
Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Rob Clark <robdclark@gmail.com> 9590e69d Wed May 20 02:21:41 CDT 2015 Uwe Kleine-König <u.kleine-koenig@pengutronix.de> drm/msm: use devm_gpiod_get_optional for optional reset gpio Since 39b2bbe3d715 (gpio: add flags argument to gpiod_get*() functions) which appeared in v3.17-rc1, the gpiod_get* functions take an additional parameter that allows to specify direction and initial value for output. Also there is a variant to find optional gpios that returns NULL if there is no gpio instead of -ENOENT. Make use of both features to simplify the driver. This makes error checking more strict because errors like -ENOSYS ("no gpio support compiled in") or -EPROBE_DEFER ("gpio not ready yet") are handled correctly now. Furthermore this is one caller less that stops us making the flags argument to gpiod_get*() mandatory. Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Rob Clark <robdclark@gmail.com>
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