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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/arm/mach-ebsa110/leds.c
Initial import
Diffstat (limited to 'arch/arm/mach-ebsa110/leds.c')
-rw-r--r--arch/arm/mach-ebsa110/leds.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/arch/arm/mach-ebsa110/leds.c b/arch/arm/mach-ebsa110/leds.c
new file mode 100644
index 000000000..0398258c2
--- /dev/null
+++ b/arch/arm/mach-ebsa110/leds.c
@@ -0,0 +1,71 @@
+/*
+ * Driver for the LED found on the EBSA110 machine
+ * Based on Versatile and RealView machine LED code
+ *
+ * License terms: GNU General Public License (GPL) version 2
+ * Author: Bryan Wu <bryan.wu@canonical.com>
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/io.h>
+#include <linux/slab.h>
+#include <linux/leds.h>
+
+#include <asm/mach-types.h>
+
+#include "core.h"
+
+#if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
+static void ebsa110_led_set(struct led_classdev *cdev,
+ enum led_brightness b)
+{
+ u8 reg = __raw_readb(SOFT_BASE);
+
+ if (b != LED_OFF)
+ reg |= 0x80;
+ else
+ reg &= ~0x80;
+
+ __raw_writeb(reg, SOFT_BASE);
+}
+
+static enum led_brightness ebsa110_led_get(struct led_classdev *cdev)
+{
+ u8 reg = __raw_readb(SOFT_BASE);
+
+ return (reg & 0x80) ? LED_FULL : LED_OFF;
+}
+
+static int __init ebsa110_leds_init(void)
+{
+
+ 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;
+}
+
+/*
+ * Since we may have triggers on any subsystem, defer registration
+ * until after subsystem_init.
+ */
+fs_initcall(ebsa110_leds_init);
+#endif