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@xxxxxxxxxx>
---
arch/arm/boot/dts/at91-nattis-2-natte-2.dts | 8 ++++++++
1 file changed, 8 insertions(+)
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))>;
+ };
};
};
--
2.11.0
