On Wed, Oct 12, 2022 at 01:09:28PM +0200, Emil Renner Berthing wrote:
> This adds the 4 PWM controlled green LEDs to the HiFive Unleashed device
> tree. The schematic doesn't specify any special function for the LEDs,
> so they're added here without any default triggers and named d1, d2, d3
> and d4 just like in the schematic.
>
> Signed-off-by: Emil Renner Berthing <emil.renner.berthing@xxxxxxxxxxxxx>
> ---
>
> Yes this board is old, but I'm trying to get rid of custom riscv patches in
> the Ubuntu kernel.
Old maybe, but some of us still have them ;)
Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Twiddled the sysfs knobs a bit too so:
Tested-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
>
> .../boot/dts/sifive/hifive-unleashed-a00.dts | 38 +++++++++++++++++++
> 1 file changed, 38 insertions(+)
>
> diff --git a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
> index ced0d4e47938..900a50526d77 100644
> --- a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
> +++ b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
> @@ -3,6 +3,8 @@
>
> #include "fu540-c000.dtsi"
> #include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/leds/common.h>
> +#include <dt-bindings/pwm/pwm.h>
>
> /* Clock frequency (in Hz) of the PCB crystal for rtcclk */
> #define RTCCLK_FREQ 1000000
> @@ -42,6 +44,42 @@ gpio-restart {
> compatible = "gpio-restart";
> gpios = <&gpio 10 GPIO_ACTIVE_LOW>;
> };
> +
> + led-controller {
> + compatible = "pwm-leds";
> +
> + led-d1 {
> + pwms = <&pwm0 0 7812500 PWM_POLARITY_INVERTED>;
> + active-low;
> + color = <LED_COLOR_ID_GREEN>;
> + max-brightness = <255>;
> + label = "d1";
> + };
> +
> + led-d2 {
> + pwms = <&pwm0 1 7812500 PWM_POLARITY_INVERTED>;
> + active-low;
> + color = <LED_COLOR_ID_GREEN>;
> + max-brightness = <255>;
> + label = "d2";
> + };
> +
> + led-d3 {
> + pwms = <&pwm0 2 7812500 PWM_POLARITY_INVERTED>;
> + active-low;
> + color = <LED_COLOR_ID_GREEN>;
> + max-brightness = <255>;
> + label = "d3";
> + };
> +
> + led-d4 {
> + pwms = <&pwm0 3 7812500 PWM_POLARITY_INVERTED>;
> + active-low;
> + color = <LED_COLOR_ID_GREEN>;
> + max-brightness = <255>;
> + label = "d4";
> + };
> + };
> };
>
> &uart0 {
> --
> 2.37.2
>
