linux-pinenote/drivers/video/backlight
Lothar Waßmann 937222c4dd pwm-backlight: Fix bogus request for GPIO#0 when instantiated from DT
commit 257462dbf3 ("pwm-backlight: switch to gpiod interface")
introduced a regression leading to acquiring a bogus GPIO-0 when
configured from DT without an 'enable-gpios' property.
The driver will happily accept the 0 initialized 'enable_gpio' member
of the struct platform_pwm_backlight_data as valid gpio number, and
request this GPIO as enable pin. In case of multiple driver instances,
the second will fail to register with the error message:
pwm-backlight backlight1.23: failed to request GPIO#0: -16

Fix this by setting enable_gpio in the pdata struct to -EINVAL.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
2014-08-20 13:23:00 +01:00
..
88pm860x_bl.c
aat2870_bl.c
adp5520_bl.c
adp8860_bl.c
adp8870_bl.c
ams369fg06.c
apple_bl.c
as3711_bl.c
backlight.c
bd6107.c
corgi_lcd.c
cr_bllcd.c
da903x_bl.c
da9052_bl.c
ep93xx_bl.c
generic_bl.c
gpio_backlight.c
hp680_bl.c
hx8357.c
ili922x.c
ili9320.c
ili9320.h
ipaq_micro_bl.c
jornada720_bl.c
jornada720_lcd.c
kb3886_bl.c
Kconfig
l4f00242t03.c
lcd.c
ld9040.c
ld9040_gamma.h
lm3533_bl.c
lm3630a_bl.c
lm3639_bl.c
lms283gf05.c
lms501kf03.c
locomolcd.c
lp855x_bl.c
lp8788_bl.c
ltv350qv.c
ltv350qv.h
lv5207lp.c
Makefile
max8925_bl.c
omap1_bl.c
ot200_bl.c
pandora_bl.c
pcf50633-backlight.c
platform_lcd.c
pwm_bl.c pwm-backlight: Fix bogus request for GPIO#0 when instantiated from DT 2014-08-20 13:23:00 +01:00
s6e63m0.c
s6e63m0_gamma.h
tdo24m.c
tosa_bl.c
tosa_lcd.c
tps65217_bl.c
vgg2432a4.c
wm831x_bl.c