The PWM0 controller of HiFive Unleashed's FU540-C000 chip is connected
to 4 LEDs.
Add them to the device tree, with function and default trigger set from
the triggers used in old kernels done by SiFive.
Signed-off-by: Icenowy Zheng <[email protected]>
---
.../boot/dts/sifive/hifive-unleashed-a00.dts | 42 +++++++++++++++++++
1 file changed, 42 insertions(+)
diff --git a/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unleashed-a00.dts
index 44824d7e50ac7..2935719ca169e 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
@@ -32,6 +34,46 @@ hfclk: hfclk {
clock-output-names = "hfclk";
};
+ led-controller {
+ compatible = "pwm-leds";
+
+ led-0 {
+ color = <LED_COLOR_ID_GREEN>;
+ pwms = <&pwm0 0 10000000 PWM_POLARITY_INVERTED>;
+ active-low;
+ max-brightness = <255>;
+ function = LED_FUNCTION_HEARTBEAT;
+ linux,default-trigger = "heartbeat";
+ };
+
+ led-1 {
+ color = <LED_COLOR_ID_GREEN>;
+ pwms = <&pwm0 1 10000000 PWM_POLARITY_INVERTED>;
+ active-low;
+ max-brightness = <255>;
+ function = LED_FUNCTION_MTD;
+ linux,default-trigger = "mtd";
+ };
+
+ led-2 {
+ color = <LED_COLOR_ID_GREEN>;
+ pwms = <&pwm0 2 10000000 PWM_POLARITY_INVERTED>;
+ active-low;
+ max-brightness = <255>;
+ function = LED_FUNCTION_LAN;
+ linux,default-trigger = "netdev";
+ };
+
+ led-3 {
+ color = <LED_COLOR_ID_GREEN>;
+ pwms = <&pwm0 3 10000000 PWM_POLARITY_INVERTED>;
+ active-low;
+ max-brightness = <255>;
+ function = LED_FUNCTION_PANIC;
+ linux,default-trigger = "panic";
+ };
+ };
+
memory@80000000 {
device_type = "memory";
reg = <0x0 0x80000000 0x2 0x00000000>;
--
2.30.2