On 06/16/2014 12:11 PM, Denis Carikli wrote:> + reg_lcd_3v3: lcd-en {
> + compatible = "regulator-fixed";
> + pinctrl-names = "default";
> + pinctrl-0 = <&pinctrl_reg_lcd_3v3>;
> + regulator-name = "lcd-3v3";
> + regulator-min-microvolt = <3300000>;
> + regulator-max-microvolt = <3300000>;
> + gpio = <&gpio3 13 GPIO_ACTIVE_HIGH>;
> + regulator-boot-on;
> + };
> +};
This is wrong, I'll fix it in the next serie.
What it really does is to make regulator-fixed think that the gpio is
active low, the bindings documentation(fixed-regulator.txt) says:
> - enable-active-high: Polarity of GPIO is Active high
> If this property is missing, the default assumed is Active low.
Then regulator-boot-on will make it think that the regulator is already
on and so the regulator will be disabled.
From the bindings documentation (regulator.txt):
> regulator-boot-on: bootloader/firmware enabled regulator
Which result at the lcd regulator being physically powered on at boot.
I didn't see that because powering it on at boot is what I want.
How can I do that beside doing it in userspace by issuing the following
commands:
echo 4 > /sys/devices/display-subsystem/graphics/fb0/blank
echo 0 > /sys/devices/display-subsystem/graphics/fb0/blank
Denis.
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