1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright 2006 - Florian Fainelli <florian@openwrt.org>
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Control the Cobalt Qube/RaQ front LED
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun #include <linux/io.h>
8*4882a593Smuzhiyun #include <linux/ioport.h>
9*4882a593Smuzhiyun #include <linux/leds.h>
10*4882a593Smuzhiyun #include <linux/module.h>
11*4882a593Smuzhiyun #include <linux/platform_device.h>
12*4882a593Smuzhiyun #include <linux/types.h>
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun #define LED_FRONT_LEFT 0x01
15*4882a593Smuzhiyun #define LED_FRONT_RIGHT 0x02
16*4882a593Smuzhiyun
17*4882a593Smuzhiyun static void __iomem *led_port;
18*4882a593Smuzhiyun static u8 led_value;
19*4882a593Smuzhiyun
qube_front_led_set(struct led_classdev * led_cdev,enum led_brightness brightness)20*4882a593Smuzhiyun static void qube_front_led_set(struct led_classdev *led_cdev,
21*4882a593Smuzhiyun enum led_brightness brightness)
22*4882a593Smuzhiyun {
23*4882a593Smuzhiyun if (brightness)
24*4882a593Smuzhiyun led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
25*4882a593Smuzhiyun else
26*4882a593Smuzhiyun led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT);
27*4882a593Smuzhiyun writeb(led_value, led_port);
28*4882a593Smuzhiyun }
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun static struct led_classdev qube_front_led = {
31*4882a593Smuzhiyun .name = "qube::front",
32*4882a593Smuzhiyun .brightness = LED_FULL,
33*4882a593Smuzhiyun .brightness_set = qube_front_led_set,
34*4882a593Smuzhiyun .default_trigger = "default-on",
35*4882a593Smuzhiyun };
36*4882a593Smuzhiyun
cobalt_qube_led_probe(struct platform_device * pdev)37*4882a593Smuzhiyun static int cobalt_qube_led_probe(struct platform_device *pdev)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun struct resource *res;
40*4882a593Smuzhiyun
41*4882a593Smuzhiyun res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
42*4882a593Smuzhiyun if (!res)
43*4882a593Smuzhiyun return -EBUSY;
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
46*4882a593Smuzhiyun if (!led_port)
47*4882a593Smuzhiyun return -ENOMEM;
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
50*4882a593Smuzhiyun writeb(led_value, led_port);
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun return devm_led_classdev_register(&pdev->dev, &qube_front_led);
53*4882a593Smuzhiyun }
54*4882a593Smuzhiyun
55*4882a593Smuzhiyun static struct platform_driver cobalt_qube_led_driver = {
56*4882a593Smuzhiyun .probe = cobalt_qube_led_probe,
57*4882a593Smuzhiyun .driver = {
58*4882a593Smuzhiyun .name = "cobalt-qube-leds",
59*4882a593Smuzhiyun },
60*4882a593Smuzhiyun };
61*4882a593Smuzhiyun
62*4882a593Smuzhiyun module_platform_driver(cobalt_qube_led_driver);
63*4882a593Smuzhiyun
64*4882a593Smuzhiyun MODULE_LICENSE("GPL");
65*4882a593Smuzhiyun MODULE_DESCRIPTION("Front LED support for Cobalt Server");
66*4882a593Smuzhiyun MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
67*4882a593Smuzhiyun MODULE_ALIAS("platform:cobalt-qube-leds");
68