aboutsummaryrefslogtreecommitdiffstats
path: root/arch/arm/mach-ebsa110/leds.c
diff options
context:
space:
mode:
authorPatrick McHardy <kaber@trash.net>2013-03-31 18:10:34 +0200
committerPatrick McHardy <kaber@trash.net>2013-03-31 18:10:34 +0200
commit70711d223510ba1773cfe1d7770a56141c815ff8 (patch)
tree4a71f38a3a554ddecaa31b7d8c6bc49b7d1705b4 /arch/arm/mach-ebsa110/leds.c
parentd53b4ed072d9779cdf53582c46436dec06d0961f (diff)
parent19f949f52599ba7c3f67a5897ac6be14bfcb1200 (diff)
Merge tag 'v3.8' of /home/kaber/src/repos/linux
Linux 3.8 Signed-off-by: Patrick McHardy <kaber@trash.net> Conflicts: include/linux/Kbuild include/linux/netlink.h
Diffstat (limited to 'arch/arm/mach-ebsa110/leds.c')
-rw-r--r--arch/arm/mach-ebsa110/leds.c81
1 files changed, 50 insertions, 31 deletions
diff --git a/arch/arm/mach-ebsa110/leds.c b/arch/arm/mach-ebsa110/leds.c
index 99e14e36250..0398258c20c 100644
--- a/arch/arm/mach-ebsa110/leds.c
+++ b/arch/arm/mach-ebsa110/leds.c
@@ -1,52 +1,71 @@
/*
- * linux/arch/arm/mach-ebsa110/leds.c
+ * Driver for the LED found on the EBSA110 machine
+ * Based on Versatile and RealView machine LED code
*
- * Copyright (C) 1998 Russell King
- *
- * 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.
- *
- * EBSA-110 LED control routines. We use the led as follows:
- *
- * - Red - toggles state every 50 timer interrupts
+ * License terms: GNU General Public License (GPL) version 2
+ * Author: Bryan Wu <bryan.wu@canonical.com>
*/
-#include <linux/module.h>
-#include <linux/spinlock.h>
+#include <linux/kernel.h>
#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
-#include <mach/hardware.h>
-#include <asm/leds.h>
#include <asm/mach-types.h>
#include "core.h"
-static spinlock_t leds_lock;
-
-static void ebsa110_leds_event(led_event_t ledevt)
+#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
+static void ebsa110_led_set(struct led_classdev *cdev,
+ enum led_brightness b)
{
- unsigned long flags;
+ u8 reg = __raw_readb(SOFT_BASE);
- spin_lock_irqsave(&leds_lock, flags);
+ if (b != LED_OFF)
+ reg |= 0x80;
+ else
+ reg &= ~0x80;
- switch(ledevt) {
- case led_timer:
- *(volatile unsigned char *)SOFT_BASE ^= 128;
- break;
+ __raw_writeb(reg, SOFT_BASE);
+}
- default:
- break;
- }
+static enum led_brightness ebsa110_led_get(struct led_classdev *cdev)
+{
+ u8 reg = __raw_readb(SOFT_BASE);
- spin_unlock_irqrestore(&leds_lock, flags);
+ return (reg & 0x80) ? LED_FULL : LED_OFF;
}
-static int __init leds_init(void)
+static int __init ebsa110_leds_init(void)
{
- if (machine_is_ebsa110())
- leds_event = ebsa110_leds_event;
+
+ struct led_classdev *cdev;
+ int ret;
+
+ if (!machine_is_ebsa110())
+ return -ENODEV;
+
+ cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
+ if (!cdev)
+ return -ENOMEM;
+
+ cdev->name = "ebsa110:0";
+ cdev->brightness_set = ebsa110_led_set;
+ cdev->brightness_get = ebsa110_led_get;
+ cdev->default_trigger = "heartbeat";
+
+ ret = led_classdev_register(NULL, cdev);
+ if (ret < 0) {
+ kfree(cdev);
+ return ret;
+ }
return 0;
}
-__initcall(leds_init);
+/*
+ * Since we may have triggers on any subsystem, defer registration
+ * until after subsystem_init.
+ */
+fs_initcall(ebsa110_leds_init);
+#endif