[U-Boot] [PATCH 22/28] nios2: add gpio led driver

[Thomas Chou]

Ths patch adds status led driver based on gpio interface.
The STATUS_LED_BIT specifies the gpio pin number.

Signed-off-by: Thomas Chou <thomas at wytron.com.tw>
---
 board/altera/common/gpioled.c |   31 +++++++++++++++++++++++++++++++
 1 files changed, 31 insertions(+), 0 deletions(-)
 create mode 100644 board/altera/common/gpioled.c

diff --git a/board/altera/common/gpioled.c b/board/altera/common/gpioled.c
new file mode 100644
index 0000000..13e0032
--- /dev/null
+++ b/board/altera/common/gpioled.c
@@ -0,0 +1,31 @@
+/*
+ * LED driver based on gpio
+ *
+ * Copyright (C) 2010 Thomas Chou <thomas at wytron.com.tw>
+ *
+ * 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 <common.h>
+#include <status_led.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+
+/* assume led is active low */
+
+void __led_init(led_id_t mask, int state)
+{
+	gpio_direction_output(mask, (state == STATUS_LED_ON) ? 0 : 1);
+}
+
+void __led_set(led_id_t mask, int state)
+{
+	gpio_set_value(mask, (state == STATUS_LED_ON) ? 0 : 1);
+}
+
+void __led_toggle(led_id_t mask)
+{
+	gpio_set_value(mask, !gpio_get_value(mask));
+}
-- 
1.6.6.1