Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6
[linux-2.6.git] / drivers / leds / leds-cobalt-qube.c
1 /*
2  * Copyright 2006 - Florian Fainelli <florian@openwrt.org>
3  *
4  * Control the Cobalt Qube/RaQ front LED
5  */
6 #include <linux/init.h>
7 #include <linux/io.h>
8 #include <linux/ioport.h>
9 #include <linux/leds.h>
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/types.h>
13
14 #define LED_FRONT_LEFT  0x01
15 #define LED_FRONT_RIGHT 0x02
16
17 static void __iomem *led_port;
18 static u8 led_value;
19
20 static void qube_front_led_set(struct led_classdev *led_cdev,
21                                enum led_brightness brightness)
22 {
23         if (brightness)
24                 led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
25         else
26                 led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT);
27         writeb(led_value, led_port);
28 }
29
30 static struct led_classdev qube_front_led = {
31         .name                   = "qube::front",
32         .brightness             = LED_FULL,
33         .brightness_set         = qube_front_led_set,
34         .default_trigger        = "default-on",
35 };
36
37 static int __devinit cobalt_qube_led_probe(struct platform_device *pdev)
38 {
39         struct resource *res;
40         int retval;
41
42         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
43         if (!res)
44                 return -EBUSY;
45
46         led_port = ioremap(res->start, resource_size(res));
47         if (!led_port)
48                 return -ENOMEM;
49
50         led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
51         writeb(led_value, led_port);
52
53         retval = led_classdev_register(&pdev->dev, &qube_front_led);
54         if (retval)
55                 goto err_iounmap;
56
57         return 0;
58
59 err_iounmap:
60         iounmap(led_port);
61         led_port = NULL;
62
63         return retval;
64 }
65
66 static int __devexit cobalt_qube_led_remove(struct platform_device *pdev)
67 {
68         led_classdev_unregister(&qube_front_led);
69
70         if (led_port) {
71                 iounmap(led_port);
72                 led_port = NULL;
73         }
74
75         return 0;
76 }
77
78 /* work with hotplug and coldplug */
79 MODULE_ALIAS("platform:cobalt-qube-leds");
80
81 static struct platform_driver cobalt_qube_led_driver = {
82         .probe  = cobalt_qube_led_probe,
83         .remove = __devexit_p(cobalt_qube_led_remove),
84         .driver = {
85                 .name   = "cobalt-qube-leds",
86                 .owner  = THIS_MODULE,
87         },
88 };
89
90 static int __init cobalt_qube_led_init(void)
91 {
92         return platform_driver_register(&cobalt_qube_led_driver);
93 }
94
95 static void __exit cobalt_qube_led_exit(void)
96 {
97         platform_driver_unregister(&cobalt_qube_led_driver);
98 }
99
100 module_init(cobalt_qube_led_init);
101 module_exit(cobalt_qube_led_exit);
102
103 MODULE_LICENSE("GPL");
104 MODULE_DESCRIPTION("Front LED support for Cobalt Server");
105 MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");