The 40-pin LCD connector on Lichee Pi Zero has backlight pins, which is controlled by the PWM0 controller of the V3s SoC, and the controlling part is on the board.
Add the PWM and backlight device nodes in the device tree file, but leave them disabled, as they can only be useful when the LCD is attached. The LCD device tree overlay files can enable these controllers and make use of them. Signed-off-by: Icenowy Zheng <[email protected]> --- arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts b/arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts index 387fc2aa546d..e0721bf725d1 100644 --- a/arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts +++ b/arch/arm/boot/dts/sun8i-v3s-licheepi-zero.dts @@ -52,6 +52,14 @@ serial0 = &uart0; }; + backlight: backlight { + compatible = "pwm-backlight"; + pwms = <&pwm 0 50000 0>; + brightness-levels = <0 10 20 30 40 50 60 70 80 90 100>; + default-brightness-level = <8>; + status = "disabled"; + }; + chosen { stdout-path = "serial0:115200n8"; }; @@ -86,6 +94,12 @@ status = "okay"; }; +&pwm { + pinctrl-0 = <&pwm0_pins>; + pinctrl-names = "default"; + status = "disabled"; +}; + &uart0 { pinctrl-0 = <&uart0_pins_a>; pinctrl-names = "default"; -- 2.12.2 -- You received this message because you are subscribed to the Google Groups "linux-sunxi" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
