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ARM: dts: at91: nattis: initialize the BLON pin as output-low early

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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>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Peter Rosin 2018-11-20 21:20:43 +00:00 committed by Alexandre Belloni
parent 0a4499dfbf
commit d8007306f6
1 changed files with 8 additions and 0 deletions
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8
arch/arm/boot/dts/at91-nattis-2-natte-2.dts
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@ -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))>;
};
};
};