From a7ac22c685011b98c7c407e9ebf638d26e0b1d6f Mon Sep 17 00:00:00 2001
From: Harvey Hunt <harvey.hunt@imgtec.com>
Date: Mon, 6 Jul 2015 10:18:57 +0100
Subject: [PATCH 1/2] MIPS: kernel: Add LED trigger support to arch_cpu_idle()

Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
---
 arch/mips/kernel/idle.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/mips/kernel/idle.c b/arch/mips/kernel/idle.c
index ad2295f24740b2..2f691d83e4a6f0 100644
--- a/arch/mips/kernel/idle.c
+++ b/arch/mips/kernel/idle.c
@@ -14,6 +14,7 @@
 #include <linux/export.h>
 #include <linux/init.h>
 #include <linux/irqflags.h>
+#include <linux/leds.h>
 #include <linux/printk.h>
 #include <linux/sched.h>
 #include <asm/cpu.h>
@@ -259,10 +260,13 @@ void __init check_wait(void)
 
 void arch_cpu_idle(void)
 {
-	if (cpu_wait)
+	if (cpu_wait) {
+		ledtrig_cpu(CPU_LED_IDLE_START);
 		cpu_wait();
-	else
+		ledtrig_cpu(CPU_LED_IDLE_END);
+	} else {
 		local_irq_enable();
+	}
 }
 
 #ifdef CONFIG_CPU_IDLE

From 2f6e4c14ac988339b2bd99ec14218e946d7bcc6b Mon Sep 17 00:00:00 2001
From: Harvey Hunt <harvey.hunt@imgtec.com>
Date: Mon, 6 Jul 2015 10:26:39 +0100
Subject: [PATCH 2/2] MIPS: Ci20: Add DT node for LED triggers

Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
---
 arch/mips/boot/dts/ci20.dts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/arch/mips/boot/dts/ci20.dts b/arch/mips/boot/dts/ci20.dts
index 51a38272569e7b..27a083f559374c 100644
--- a/arch/mips/boot/dts/ci20.dts
+++ b/arch/mips/boot/dts/ci20.dts
@@ -101,6 +101,22 @@
 		type = <RFKILL_TYPE_BLUETOOTH>;
 		vrfkill-supply = <&bt_reset>;
 	};
+
+	leds {
+		compatible = "gpio-leds";
+		led1 {
+			gpios = <&gpc 0 0>;
+			linux,default-trigger = "cpu0";
+		};
+		led2 {
+			gpios = <&gpc 1 0>;
+			linux,default-trigger = "cpu1";
+		};
+		led3 {
+			gpios = <&gpc 2 0>;
+			linux,default-trigger = "nand-disk";
+		};
+	};
 };
 
 &ext {