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authorjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2010-03-08 12:10:01 +0000
committerjuhosg <juhosg@3c298f89-4303-0410-b956-a3cf2f4a3e73>2010-03-08 12:10:01 +0000
commit7ee68b0bf39237ac6fa0f3137be865c4048e2e64 (patch)
treed4110c2126f6edc187ec2826306ffc8b24a27183 /target/linux/ar71xx/files/drivers
parentbdf568ed135c4434fc6c796e6d1658aae44ccd29 (diff)
ar71xx: add LED driver for the RB750
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@20051 3c298f89-4303-0410-b956-a3cf2f4a3e73
Diffstat (limited to 'target/linux/ar71xx/files/drivers')
-rw-r--r--target/linux/ar71xx/files/drivers/leds/leds-rb750.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/drivers/leds/leds-rb750.c b/target/linux/ar71xx/files/drivers/leds/leds-rb750.c
new file mode 100644
index 000000000..2e6064763
--- /dev/null
+++ b/target/linux/ar71xx/files/drivers/leds/leds-rb750.c
@@ -0,0 +1,140 @@
+/*
+ * LED driver for the RouterBOARD 750
+ *
+ * Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org>
+ *
+ * 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/kernel.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/leds.h>
+
+#include <asm/mach-ar71xx/mach-rb750.h>
+
+#define DRV_NAME "leds-rb750"
+
+struct rb750_led_dev {
+ struct led_classdev cdev;
+ u32 mask;
+ int active_low;
+};
+
+struct rb750_led_drvdata {
+ struct rb750_led_dev *led_devs;
+ int num_leds;
+};
+
+static inline struct rb750_led_dev *to_rbled(struct led_classdev *led_cdev)
+{
+ return (struct rb750_led_dev *)container_of(led_cdev,
+ struct rb750_led_dev, cdev);
+}
+
+static void rb750_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct rb750_led_dev *rbled = to_rbled(led_cdev);
+ int level;
+
+ level = (value == LED_OFF) ? 0 : 1;
+ level ^= rbled->active_low;
+
+ if (level)
+ rb750_latch_change(0, rbled->mask);
+ else
+ rb750_latch_change(rbled->mask, 0);
+}
+
+static int __devinit rb750_led_probe(struct platform_device *pdev)
+{
+ struct rb750_led_platform_data *pdata;
+ struct rb750_led_drvdata *drvdata;
+ int ret = 0;
+ int i;
+
+ pdata = pdev->dev.platform_data;
+ if (!pdata)
+ return -EINVAL;
+
+ drvdata = kzalloc(sizeof(struct rb750_led_drvdata) +
+ sizeof(struct rb750_led_dev) * pdata->num_leds,
+ GFP_KERNEL);
+ if (!drvdata)
+ return -ENOMEM;
+
+ drvdata->num_leds = pdata->num_leds;
+ drvdata->led_devs = (struct rb750_led_dev *) &drvdata[1];
+
+ for (i = 0; i < drvdata->num_leds; i++) {
+ struct rb750_led_dev *rbled = &drvdata->led_devs[i];
+ struct rb750_led_data *led_data = &pdata->leds[i];
+
+ rbled->cdev.name = led_data->name;
+ rbled->cdev.default_trigger = led_data->default_trigger;
+ rbled->cdev.brightness_set = rb750_led_brightness_set;
+ rbled->cdev.brightness = LED_OFF;
+
+ rbled->mask = led_data->mask;
+ rbled->active_low = !!led_data->active_low;
+
+ ret = led_classdev_register(&pdev->dev, &rbled->cdev);
+ if (ret)
+ goto err;
+ }
+
+ platform_set_drvdata(pdev, drvdata);
+ return 0;
+
+ err:
+ for (i = i - 1; i >= 0; i--)
+ led_classdev_unregister(&drvdata->led_devs[i].cdev);
+
+ kfree(drvdata);
+ return ret;
+}
+
+static int __devexit rb750_led_remove(struct platform_device *pdev)
+{
+ struct rb750_led_drvdata *drvdata;
+ int i;
+
+ drvdata = platform_get_drvdata(pdev);
+ for (i = 0; i < drvdata->num_leds; i++)
+ led_classdev_unregister(&drvdata->led_devs[i].cdev);
+
+ kfree(drvdata);
+ return 0;
+}
+
+static struct platform_driver rb750_led_driver = {
+ .probe = rb750_led_probe,
+ .remove = __devexit_p(rb750_led_remove),
+ .driver = {
+ .name = DRV_NAME,
+ .owner = THIS_MODULE,
+ },
+};
+
+MODULE_ALIAS("platform:leds-rb750");
+
+static int __init rb750_led_init(void)
+{
+ return platform_driver_register(&rb750_led_driver);
+}
+
+static void __exit rb750_led_exit(void)
+{
+ platform_driver_unregister(&rb750_led_driver);
+}
+
+module_init(rb750_led_init);
+module_exit(rb750_led_exit);
+
+MODULE_DESCRIPTION(DRV_NAME);
+MODULE_DESCRIPTION("LED driver for the RouterBOARD 750");
+MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
+MODULE_LICENSE("GPL v2");