| Message ID | 20181120212036.22497-1-peda@axentia.se (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ARM: dts: at91: nattis: initialize the BLON pin as output-low early | expand |
On 20/11/2018 21:20:43+0000, Peter Rosin wrote: > The pwm-backlight driver initializes BLON (the enable gpio) to > output-high if the gpio is input on probe. Initializing the gpio > to output-low before the driver probes prevents this action by > the pwm-backlight driver and gets rid of a nasty blink of full > backlight with an uninitialized panel. > > Signed-off-by: Peter Rosin <peda@axentia.se> > --- > arch/arm/boot/dts/at91-nattis-2-natte-2.dts | 8 ++++++++ > 1 file changed, 8 insertions(+) > Applied, thanks.
diff --git a/arch/arm/boot/dts/at91-nattis-2-natte-2.dts b/arch/arm/boot/dts/at91-nattis-2-natte-2.dts index 911d2c7c1500..0f6d335125e2 100644 --- a/arch/arm/boot/dts/at91-nattis-2-natte-2.dts +++ b/arch/arm/boot/dts/at91-nattis-2-natte-2.dts @@ -60,6 +60,8 @@ power-supply = <&bl_reg>; enable-gpios = <&pioA 20 GPIO_ACTIVE_HIGH>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_blon>; }; panel: panel { @@ -164,6 +166,12 @@ (AT91_PINCTRL_OUTPUT | AT91_PINCTRL_OUTPUT_VAL(0))>; }; + + pinctrl_blon: blon { + atmel,pins = <AT91_PIOA 20 AT91_PERIPH_GPIO + (AT91_PINCTRL_OUTPUT | + AT91_PINCTRL_OUTPUT_VAL(0))>; + }; }; };
The pwm-backlight driver initializes BLON (the enable gpio) to output-high if the gpio is input on probe. Initializing the gpio to output-low before the driver probes prevents this action by the pwm-backlight driver and gets rid of a nasty blink of full backlight with an uninitialized panel. Signed-off-by: Peter Rosin <peda@axentia.se> --- arch/arm/boot/dts/at91-nattis-2-natte-2.dts | 8 ++++++++ 1 file changed, 8 insertions(+)