tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 2006 - Florian Fainelli <florian@openwrt.org>
3 *
4 * Control the Cobalt Qube/RaQ front LED
5 */
6#include <linux/io.h>
7#include <linux/ioport.h>
8#include <linux/leds.h>
9#include <linux/module.h>
10#include <linux/platform_device.h>
11#include <linux/types.h>
12
13#define LED_FRONT_LEFT 0x01
14#define LED_FRONT_RIGHT 0x02
15
16static void __iomem *led_port;
17static u8 led_value;
18
19static void qube_front_led_set(struct led_classdev *led_cdev,
20 enum led_brightness brightness)
21{
22 if (brightness)
23 led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
24 else
25 led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT);
26 writeb(led_value, led_port);
27}
28
29static struct led_classdev qube_front_led = {
30 .name = "qube::front",
31 .brightness = LED_FULL,
32 .brightness_set = qube_front_led_set,
33 .default_trigger = "default-on",
34};
35
36static int cobalt_qube_led_probe(struct platform_device *pdev)
37{
38 struct resource *res;
39
40 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
41 if (!res)
42 return -EBUSY;
43
44 led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
45 if (!led_port)
46 return -ENOMEM;
47
48 led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
49 writeb(led_value, led_port);
50
51 return devm_led_classdev_register(&pdev->dev, &qube_front_led);
52}
53
54static struct platform_driver cobalt_qube_led_driver = {
55 .probe = cobalt_qube_led_probe,
56 .driver = {
57 .name = "cobalt-qube-leds",
58 },
59};
60
61module_platform_driver(cobalt_qube_led_driver);
62
63MODULE_LICENSE("GPL");
64MODULE_DESCRIPTION("Front LED support for Cobalt Server");
65MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
66MODULE_ALIAS("platform:cobalt-qube-leds");