From 2aa810c2797a4cdf3b58520c20c8bcb54d874d54 Mon Sep 17 00:00:00 2001
From: Kevin Mihelich <kevin@archlinuxarm.org>
Date: Sun, 25 Feb 2018 16:32:06 -0700
Subject: [PATCH 4/9] leds: trigger: Introduce a SATA trigger

Signed-off-by: Kevin Mihelich <kevin@archlinuxarm.org>
---
 drivers/leds/trigger/Kconfig        |  6 ++++
 drivers/leds/trigger/Makefile       |  1 +
 drivers/leds/trigger/ledtrig-sata.c | 43 +++++++++++++++++++++++++++++
 include/linux/leds.h                |  6 ++++
 4 files changed, 56 insertions(+)
 create mode 100644 drivers/leds/trigger/ledtrig-sata.c

diff --git a/drivers/leds/trigger/Kconfig b/drivers/leds/trigger/Kconfig
index a2559b4fdfff..592f942e0300 100644
--- a/drivers/leds/trigger/Kconfig
+++ b/drivers/leds/trigger/Kconfig
@@ -41,6 +41,12 @@ config LEDS_TRIGGER_DISK
 	  This allows LEDs to be controlled by disk activity.
 	  If unsure, say Y.
 
+config LEDS_TRIGGER_SATA
+	bool "LED SATA Disk Trigger for Kirkwood SOC"
+	depends on LEDS_TRIGGERS
+	help
+	  This allows LEDs to be controlled by IDE disk activity.
+
 config LEDS_TRIGGER_MTD
 	bool "LED MTD (NAND/NOR) Trigger"
 	depends on MTD
diff --git a/drivers/leds/trigger/Makefile b/drivers/leds/trigger/Makefile
index f3cfe1950538..f294704a3ebe 100644
--- a/drivers/leds/trigger/Makefile
+++ b/drivers/leds/trigger/Makefile
@@ -2,6 +2,7 @@
 obj-$(CONFIG_LEDS_TRIGGER_TIMER)	+= ledtrig-timer.o
 obj-$(CONFIG_LEDS_TRIGGER_ONESHOT)	+= ledtrig-oneshot.o
 obj-$(CONFIG_LEDS_TRIGGER_DISK)		+= ledtrig-disk.o
+obj-$(CONFIG_LEDS_TRIGGER_SATA)		+= ledtrig-sata.o
 obj-$(CONFIG_LEDS_TRIGGER_MTD)		+= ledtrig-mtd.o
 obj-$(CONFIG_LEDS_TRIGGER_HEARTBEAT)	+= ledtrig-heartbeat.o
 obj-$(CONFIG_LEDS_TRIGGER_BACKLIGHT)	+= ledtrig-backlight.o
diff --git a/drivers/leds/trigger/ledtrig-sata.c b/drivers/leds/trigger/ledtrig-sata.c
new file mode 100644
index 000000000000..f1798f43666f
--- /dev/null
+++ b/drivers/leds/trigger/ledtrig-sata.c
@@ -0,0 +1,43 @@
+/*
+ * LED SATA-Disk Activity Trigger
+ *
+ * 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/init.h>
+#include <linux/leds.h>
+
+#define BLINK_DELAY 30
+
+DEFINE_LED_TRIGGER(ledtrig_sata1);
+DEFINE_LED_TRIGGER(ledtrig_sata2);
+
+void ledtrig_sata_activity(int port_number)
+{
+	unsigned long sata_blink_delay = BLINK_DELAY;
+
+	switch (port_number) {
+		case 0:
+			led_trigger_blink_oneshot(ledtrig_sata1, &sata_blink_delay, &sata_blink_delay, 0);
+			break;
+		case 1:
+			led_trigger_blink_oneshot(ledtrig_sata2, &sata_blink_delay, &sata_blink_delay, 0);
+			break;
+		default:
+			break;
+       }
+}
+EXPORT_SYMBOL(ledtrig_sata_activity);
+
+static int __init ledtrig_sata_init(void)
+{
+       led_trigger_register_simple("sata-disk1", &ledtrig_sata1);
+       led_trigger_register_simple("sata-disk2", &ledtrig_sata2);
+
+	return 0;
+}
+device_initcall(ledtrig_sata_init);
diff --git a/include/linux/leds.h b/include/linux/leds.h
index b7e82550e655..065d1b955aca 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -351,6 +351,12 @@ extern void ledtrig_disk_activity(bool write);
 static inline void ledtrig_disk_activity(bool write) {}
 #endif
 
+#ifdef CONFIG_LEDS_TRIGGER_SATA
+extern void ledtrig_sata_activity(int port_number);
+#else
+static inline void ledtrig_sata_activity(int port_number) {}
+#endif
+
 #ifdef CONFIG_LEDS_TRIGGER_MTD
 extern void ledtrig_mtd_activity(void);
 #else
-- 
2.17.0