2 * LED driver for the RouterBOARD 750
4 * Copyright (C) 2010 Gabor Juhos <juhosg@openwrt.org>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #include <linux/kernel.h>
12 #include <linux/module.h>
13 #include <linux/init.h>
14 #include <linux/platform_device.h>
15 #include <linux/leds.h>
16 #include <linux/slab.h>
18 #include <asm/mach-ath79/mach-rb750.h>
20 #define DRV_NAME "leds-rb750"
22 struct rb750_led_dev {
23 struct led_classdev cdev;
26 void (*latch_change)(u32 clear, u32 set);
29 struct rb750_led_drvdata {
30 struct rb750_led_dev *led_devs;
34 static inline struct rb750_led_dev *to_rbled(struct led_classdev *led_cdev)
36 return (struct rb750_led_dev *)container_of(led_cdev,
37 struct rb750_led_dev, cdev);
40 static void rb750_led_brightness_set(struct led_classdev *led_cdev,
41 enum led_brightness value)
43 struct rb750_led_dev *rbled = to_rbled(led_cdev);
46 level = (value == LED_OFF) ? 0 : 1;
47 level ^= rbled->active_low;
50 rbled->latch_change(0, rbled->mask);
52 rbled->latch_change(rbled->mask, 0);
55 static int __devinit rb750_led_probe(struct platform_device *pdev)
57 struct rb750_led_platform_data *pdata;
58 struct rb750_led_drvdata *drvdata;
62 pdata = pdev->dev.platform_data;
66 drvdata = kzalloc(sizeof(struct rb750_led_drvdata) +
67 sizeof(struct rb750_led_dev) * pdata->num_leds,
72 drvdata->num_leds = pdata->num_leds;
73 drvdata->led_devs = (struct rb750_led_dev *) &drvdata[1];
75 for (i = 0; i < drvdata->num_leds; i++) {
76 struct rb750_led_dev *rbled = &drvdata->led_devs[i];
77 struct rb750_led_data *led_data = &pdata->leds[i];
79 rbled->cdev.name = led_data->name;
80 rbled->cdev.default_trigger = led_data->default_trigger;
81 rbled->cdev.brightness_set = rb750_led_brightness_set;
82 rbled->cdev.brightness = LED_OFF;
84 rbled->mask = led_data->mask;
85 rbled->active_low = !!led_data->active_low;
86 rbled->latch_change = pdata->latch_change;
88 ret = led_classdev_register(&pdev->dev, &rbled->cdev);
93 platform_set_drvdata(pdev, drvdata);
97 for (i = i - 1; i >= 0; i--)
98 led_classdev_unregister(&drvdata->led_devs[i].cdev);
104 static int __devexit rb750_led_remove(struct platform_device *pdev)
106 struct rb750_led_drvdata *drvdata;
109 drvdata = platform_get_drvdata(pdev);
110 for (i = 0; i < drvdata->num_leds; i++)
111 led_classdev_unregister(&drvdata->led_devs[i].cdev);
117 static struct platform_driver rb750_led_driver = {
118 .probe = rb750_led_probe,
119 .remove = __devexit_p(rb750_led_remove),
122 .owner = THIS_MODULE,
126 MODULE_ALIAS("platform:leds-rb750");
128 static int __init rb750_led_init(void)
130 return platform_driver_register(&rb750_led_driver);
133 static void __exit rb750_led_exit(void)
135 platform_driver_unregister(&rb750_led_driver);
138 module_init(rb750_led_init);
139 module_exit(rb750_led_exit);
141 MODULE_DESCRIPTION(DRV_NAME);
142 MODULE_DESCRIPTION("LED driver for the RouterBOARD 750");
143 MODULE_AUTHOR("Gabor Juhos <juhosg@openwrt.org>");
144 MODULE_LICENSE("GPL v2");