linux-kernel - [PATCH v1 4/4] riscv: dts: sifive unmatched: Add PWM controlled LEDs

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Date:   Tue,  5 Jul 2022 23:01:43 +0200
From:   Emil Renner Berthing <emil.renner.berthing@...onical.com>
To:     linux-kernel@...r.kernel.org
Cc:     Pavel Machek <pavel@....cz>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Vincent Pelletier <plr.vincent@...il.com>,
        Bin Meng <bin.meng@...driver.com>,
        Aurelien Jarno <aurelien@...el32.net>,
        Ron Economos <w6rz@...cast.net>,
        Qiu Wenbo <qiuwenbo@...inos.com.cn>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Stephen L Arnold <nerdboy@...too.org>,
        Jianlong Huang <jianlong.huang@...rfivetech.com>,
        Mark Kettenis <kettenis@...nbsd.org>,
        Sven Schwermer <sven.schwermer@...ruptive-technologies.com>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        David Abdurachmanov <davidlt@...osinc.com>,
        linux-leds@...r.kernel.org, devicetree@...r.kernel.org,
        linux-riscv@...ts.infradead.org
Subject: [PATCH v1 4/4] riscv: dts: sifive unmatched: Add PWM controlled LEDs

This adds the two PWM controlled LEDs to the HiFive Unmatched device
tree. D12 is just a regular green diode, but D2 is an RGB diode with 3
PWM inputs controlling the three different colours.

Signed-off-by: Emil Renner Berthing <emil.renner.berthing@...onical.com>
---
 .../boot/dts/sifive/hifive-unmatched-a00.dts  | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
index c4ed9efdff03..beaefe74755a 100644
--- a/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
+++ b/arch/riscv/boot/dts/sifive/hifive-unmatched-a00.dts
@@ -4,6 +4,8 @@
 #include "fu740-c000.dtsi"
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/interrupt-controller/irq.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
@@ -44,6 +46,46 @@ gpio-poweroff {
 		compatible = "gpio-poweroff";
 		gpios = <&gpio 2 GPIO_ACTIVE_LOW>;
 	};
+
+	led-controller-1 {
+		compatible = "pwm-leds";
+
+		led-d12 {
+			pwms = <&pwm0 0 7812500 PWM_POLARITY_INVERTED>;
+			active-low;
+			color = <LED_COLOR_ID_GREEN>;
+			max-brightness = <255>;
+			label = "d12";
+		};
+	};
+
+	led-controller-2 {
+		compatible = "pwm-leds-multicolor";
+
+		multi-led {
+			color = <LED_COLOR_ID_RGB>;
+			max-brightness = <255>;
+			label = "d2";
+
+			led-red {
+				pwms = <&pwm0 2 7812500 PWM_POLARITY_INVERTED>;
+				active-low;
+				color = <LED_COLOR_ID_RED>;
+			};
+
+			led-green {
+				pwms = <&pwm0 1 7812500 PWM_POLARITY_INVERTED>;
+				active-low;
+				color = <LED_COLOR_ID_GREEN>;
+			};
+
+			led-blue {
+				pwms = <&pwm0 3 7812500 PWM_POLARITY_INVERTED>;
+				active-low;
+				color = <LED_COLOR_ID_BLUE>;
+			};
+		};
+	};
 };
 
 &uart0 {
-- 
2.37.0