ar71xx: add LED driver NU801

The MR18 uses a 3-channel 16-bit PWM Constant Current Driver
for its status LED.

Signed-off-by: Chris R Blake <chrisrblake93@gmail.com>

SVN-Revision: 47848

target/linux/ar71xx/files/include/linux/leds-nu801.h

@@ -0,0 +1,38 @@
+#ifndef __LEDS_NU801_H__
+#define __LEDS_NU801_H__
+
+/*
+ * Definitions for LED driver for NU801
+ *
+ * Kevin Paul Herbert
+ * Copyright (c) 2012, Meraki, Inc.
+ *
+ * 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/leds.h>
+
+struct led_nu801_template {
+	const char *device_name;	/* Name of the platform device */
+	const char *name;	/* Name of this LED chain */
+	int num_leds;		/* Number of LEDs in the chain */
+	unsigned cki;		/* GPIO pin for CKI */
+	unsigned sdi;		/* GPIO pin for SDI */
+	int lei;		/* GPIO pin for LEI; < 0 if none */
+	u32 ndelay;		/* Delay in nanoseconds */
+	enum led_brightness init_brightness[3]; /* Default rgb state */
+#ifdef CONFIG_LEDS_TRIGGERS
+	const char *default_trigger; /* default trigger */
+#endif
+	const char *led_colors[3];  /* rgb color order */
+};
+
+struct led_nu801_platform_data {
+	int num_controllers;	/* Numnber of controllers */
+	struct led_nu801_template *template; /* Template per controller */
+};
+
+#endif /* __LEDS_NU801_H__ */