From 849369d6c66d3054688672f97d31fceb8e8230fb Mon Sep 17 00:00:00 2001
From: root <root@artemis.panaceas.org>
Date: Fri, 25 Dec 2015 04:40:36 +0000
Subject: initial_commit

---
 arch/arm/mach-ks8695/leds.c | 93 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 93 insertions(+)
 create mode 100644 arch/arm/mach-ks8695/leds.c

(limited to 'arch/arm/mach-ks8695/leds.c')

diff --git a/arch/arm/mach-ks8695/leds.c b/arch/arm/mach-ks8695/leds.c
new file mode 100644
index 00000000..184ef74e
--- /dev/null
+++ b/arch/arm/mach-ks8695/leds.c
@@ -0,0 +1,93 @@
+/*
+ * LED driver for KS8695-based boards.
+ *
+ * Copyright (C) Andrew Victor
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+
+#include <asm/leds.h>
+#include <mach/devices.h>
+#include <mach/gpio.h>
+
+
+static inline void ks8695_led_on(unsigned int led)
+{
+	gpio_set_value(led, 0);
+}
+
+static inline void ks8695_led_off(unsigned int led)
+{
+	gpio_set_value(led, 1);
+}
+
+static inline void ks8695_led_toggle(unsigned int led)
+{
+	unsigned long is_off = gpio_get_value(led);
+	if (is_off)
+		ks8695_led_on(led);
+	else
+		ks8695_led_off(led);
+}
+
+
+/*
+ * Handle LED events.
+ */
+static void ks8695_leds_event(led_event_t evt)
+{
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	switch(evt) {
+	case led_start:		/* System startup */
+		ks8695_led_on(ks8695_leds_cpu);
+		break;
+
+	case led_stop:		/* System stop / suspend */
+		ks8695_led_off(ks8695_leds_cpu);
+		break;
+
+#ifdef CONFIG_LEDS_TIMER
+	case led_timer:		/* Every 50 timer ticks */
+		ks8695_led_toggle(ks8695_leds_timer);
+		break;
+#endif
+
+#ifdef CONFIG_LEDS_CPU
+	case led_idle_start:	/* Entering idle state */
+		ks8695_led_off(ks8695_leds_cpu);
+		break;
+
+	case led_idle_end:	/* Exit idle state */
+		ks8695_led_on(ks8695_leds_cpu);
+		break;
+#endif
+
+	default:
+		break;
+	}
+
+	local_irq_restore(flags);
+}
+
+
+static int __init leds_init(void)
+{
+	if ((ks8695_leds_timer == -1) || (ks8695_leds_cpu == -1))
+		return -ENODEV;
+
+	leds_event = ks8695_leds_event;
+
+	leds_event(led_start);
+	return 0;
+}
+
+__initcall(leds_init);
-- 
cgit v1.2.3