1 /*
2 * drivers/leds/leds-cm-x270.c
3 *
4 * Copyright 2007 CompuLab Ltd.
5 * Author: Mike Rapoport <mike@compulab.co.il>
6 *
7 * Based on leds-corgi.c
8 * Author: Richard Purdie <rpurdie@openedhand.com>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
13 *
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/init.h>
18 #include <linux/platform_device.h>
19 #include <linux/leds.h>
20
21 #include <asm/arch/hardware.h>
22 #include <asm/arch/pxa-regs.h>
23
24 #define GPIO_RED_LED (93)
25 #define GPIO_GREEN_LED (94)
26
27 static void cmx270_red_set(struct led_classdev *led_cdev,
28 enum led_brightness value)
29 {
30 if (value)
31 GPCR(GPIO_RED_LED) = GPIO_bit(GPIO_RED_LED);
32 else
33 GPSR(GPIO_RED_LED) = GPIO_bit(GPIO_RED_LED);
34 }
35
36 static void cmx270_green_set(struct led_classdev *led_cdev,
37 enum led_brightness value)
38 {
39 if (value)
40 GPCR(GPIO_GREEN_LED) = GPIO_bit(GPIO_GREEN_LED);
41 else
42 GPSR(GPIO_GREEN_LED) = GPIO_bit(GPIO_GREEN_LED);
43 }
44
45 static struct led_classdev cmx270_red_led = {
46 .name = "cm-x270:red",
47 .default_trigger = "nand-disk",
48 .brightness_set = cmx270_red_set,
49 };
50
51 static struct led_classdev cmx270_green_led = {
52 .name = "cm-x270:green",
53 .default_trigger = "heartbeat",
54 .brightness_set = cmx270_green_set,
55 };
56
57 #ifdef CONFIG_PM
58 static int cmx270led_suspend(struct platform_device *dev, pm_message_t state)
59 {
60 led_classdev_suspend(&cmx270_red_led);
61 led_classdev_suspend(&cmx270_green_led);
62 return 0;
63 }
64
65 static int cmx270led_resume(struct platform_device *dev)
66 {
67 led_classdev_resume(&cmx270_red_led);
68 led_classdev_resume(&cmx270_green_led);
69 return 0;
70 }
71 #endif
72
73 static int cmx270led_probe(struct platform_device *pdev)
74 {
75 int ret;
76
77 ret = led_classdev_register(&pdev->dev, &cmx270_red_led);
78 if (ret < 0)
79 return ret;
80
81 ret = led_classdev_register(&pdev->dev, &cmx270_green_led);
82 if (ret < 0)
83 led_classdev_unregister(&cmx270_red_led);
84
85 return ret;
86 }
87
88 static int cmx270led_remove(struct platform_device *pdev)
89 {
90 led_classdev_unregister(&cmx270_red_led);
91 led_classdev_unregister(&cmx270_green_led);
92 return 0;
93 }
94
95 static struct platform_driver cmx270led_driver = {
96 .probe = cmx270led_probe,
97 .remove = cmx270led_remove,
98 #ifdef CONFIG_PM
99 .suspend = cmx270led_suspend,
100 .resume = cmx270led_resume,
101 #endif
102 .driver = {
103 .name = "cm-x270-led",
104 .owner = THIS_MODULE,
105 },
106 };
107
108 static int __init cmx270led_init(void)
109 {
110 return platform_driver_register(&cmx270led_driver);
111 }
112
113 static void __exit cmx270led_exit(void)
114 {
115 platform_driver_unregister(&cmx270led_driver);
116 }
117
118 module_init(cmx270led_init);
119 module_exit(cmx270led_exit);
120
121 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
122 MODULE_DESCRIPTION("CM-x270 LED driver");
123 MODULE_LICENSE("GPL");
124 MODULE_ALIAS("platform:cm-x270-led");
125
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