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@@ -0,0 +1,140 @@
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+/*
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+ * LED driver for the RouterBOARD 750
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+ *
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+ * Copyright (C) 2010 Gabor Juhos <[email protected]>
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+ *
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+ * This program is free software; you can redistribute it and/or modify
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+ * it under the terms of the GNU General Public License version 2 as
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+ * published by the Free Software Foundation.
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+ *
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+ */
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+#include <linux/kernel.h>
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+#include <linux/init.h>
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+#include <linux/platform_device.h>
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+#include <linux/leds.h>
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+
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+#include <asm/mach-ar71xx/mach-rb750.h>
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+
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+#define DRV_NAME "leds-rb750"
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+
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+struct rb750_led_dev {
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+ struct led_classdev cdev;
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+ u32 mask;
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+ int active_low;
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+};
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+
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+struct rb750_led_drvdata {
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+ struct rb750_led_dev *led_devs;
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+ int num_leds;
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+};
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+
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+static inline struct rb750_led_dev *to_rbled(struct led_classdev *led_cdev)
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+{
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+ return (struct rb750_led_dev *)container_of(led_cdev,
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+ struct rb750_led_dev, cdev);
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+}
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+
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+static void rb750_led_brightness_set(struct led_classdev *led_cdev,
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+ enum led_brightness value)
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+{
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+ struct rb750_led_dev *rbled = to_rbled(led_cdev);
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+ int level;
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+
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+ level = (value == LED_OFF) ? 0 : 1;
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+ level ^= rbled->active_low;
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+
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+ if (level)
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+ rb750_latch_change(0, rbled->mask);
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+ else
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+ rb750_latch_change(rbled->mask, 0);
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+}
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+
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+static int __devinit rb750_led_probe(struct platform_device *pdev)
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+{
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+ struct rb750_led_platform_data *pdata;
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+ struct rb750_led_drvdata *drvdata;
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+ int ret = 0;
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+ int i;
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+
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+ pdata = pdev->dev.platform_data;
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+ if (!pdata)
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+ return -EINVAL;
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+
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+ drvdata = kzalloc(sizeof(struct rb750_led_drvdata) +
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+ sizeof(struct rb750_led_dev) * pdata->num_leds,
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+ GFP_KERNEL);
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+ if (!drvdata)
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+ return -ENOMEM;
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+
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+ drvdata->num_leds = pdata->num_leds;
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+ drvdata->led_devs = (struct rb750_led_dev *) &drvdata[1];
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+
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+ for (i = 0; i < drvdata->num_leds; i++) {
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+ struct rb750_led_dev *rbled = &drvdata->led_devs[i];
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+ struct rb750_led_data *led_data = &pdata->leds[i];
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+
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+ rbled->cdev.name = led_data->name;
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+ rbled->cdev.default_trigger = led_data->default_trigger;
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+ rbled->cdev.brightness_set = rb750_led_brightness_set;
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+ rbled->cdev.brightness = LED_OFF;
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+
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+ rbled->mask = led_data->mask;
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+ rbled->active_low = !!led_data->active_low;
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+
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+ ret = led_classdev_register(&pdev->dev, &rbled->cdev);
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+ if (ret)
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+ goto err;
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+ }
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+
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+ platform_set_drvdata(pdev, drvdata);
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+ return 0;
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+
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+ err:
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+ for (i = i - 1; i >= 0; i--)
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+ led_classdev_unregister(&drvdata->led_devs[i].cdev);
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+
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+ kfree(drvdata);
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+ return ret;
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+}
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+
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+static int __devexit rb750_led_remove(struct platform_device *pdev)
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+{
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+ struct rb750_led_drvdata *drvdata;
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+ int i;
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+
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+ drvdata = platform_get_drvdata(pdev);
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+ for (i = 0; i < drvdata->num_leds; i++)
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+ led_classdev_unregister(&drvdata->led_devs[i].cdev);
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+
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+ kfree(drvdata);
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+ return 0;
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+}
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+
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+static struct platform_driver rb750_led_driver = {
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+ .probe = rb750_led_probe,
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+ .remove = __devexit_p(rb750_led_remove),
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+ .driver = {
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+ .name = DRV_NAME,
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+ .owner = THIS_MODULE,
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+ },
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+};
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+
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+MODULE_ALIAS("platform:leds-rb750");
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+
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+static int __init rb750_led_init(void)
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+{
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+ return platform_driver_register(&rb750_led_driver);
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+}
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+
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+static void __exit rb750_led_exit(void)
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+{
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+ platform_driver_unregister(&rb750_led_driver);
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+}
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+
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+module_init(rb750_led_init);
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+module_exit(rb750_led_exit);
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+
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+MODULE_DESCRIPTION(DRV_NAME);
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+MODULE_DESCRIPTION("LED driver for the RouterBOARD 750");
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+MODULE_AUTHOR("Gabor Juhos <[email protected]>");
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+MODULE_LICENSE("GPL v2");
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Gabor Juhos