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authorThomas Chou <thomas@wytron.com.tw>2010-04-30 11:34:14 +0800
committerScott McNutt <smcnutt@psyent.com>2010-05-28 10:56:03 -0400
commit3e6b86b5552840bb4147871a753840eb3923374c (patch)
treee99778f2e762cf8f52898a81ff13480de1939f99 /drivers/misc/gpio_led.c
parentcedd341d551b6b705e97ab1953a87575b9ff9ef9 (diff)
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misc: add gpio based status led driver
This patch adds a status led driver followed the GPIO access conventions of Linux. The led mask is used to specify the gpio pin. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Tested-by: Ian Abbott <abbotti@mev.co.uk> Signed-off-by: Scott McNutt <smcnutt@psyent.com>
Diffstat (limited to 'drivers/misc/gpio_led.c')
-rw-r--r--drivers/misc/gpio_led.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/drivers/misc/gpio_led.c b/drivers/misc/gpio_led.c
new file mode 100644
index 0000000..acd6a90
--- /dev/null
+++ b/drivers/misc/gpio_led.c
@@ -0,0 +1,30 @@
+/*
+ * Status LED driver based on GPIO access conventions of Linux
+ *
+ * Copyright (C) 2010 Thomas Chou <thomas@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/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));
+}