1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * LEDs driver for PCEngines WRAP
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2006 Kristian Kielhofner <kris@krisk.org>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Based on leds-net48xx.c
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/kernel.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <linux/platform_device.h>
13*4882a593Smuzhiyun #include <linux/leds.h>
14*4882a593Smuzhiyun #include <linux/err.h>
15*4882a593Smuzhiyun #include <linux/io.h>
16*4882a593Smuzhiyun #include <linux/scx200_gpio.h>
17*4882a593Smuzhiyun #include <linux/module.h>
18*4882a593Smuzhiyun
19*4882a593Smuzhiyun #define DRVNAME "wrap-led"
20*4882a593Smuzhiyun #define WRAP_POWER_LED_GPIO 2
21*4882a593Smuzhiyun #define WRAP_ERROR_LED_GPIO 3
22*4882a593Smuzhiyun #define WRAP_EXTRA_LED_GPIO 18
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun static struct platform_device *pdev;
25*4882a593Smuzhiyun
wrap_power_led_set(struct led_classdev * led_cdev,enum led_brightness value)26*4882a593Smuzhiyun static void wrap_power_led_set(struct led_classdev *led_cdev,
27*4882a593Smuzhiyun enum led_brightness value)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun if (value)
30*4882a593Smuzhiyun scx200_gpio_set_low(WRAP_POWER_LED_GPIO);
31*4882a593Smuzhiyun else
32*4882a593Smuzhiyun scx200_gpio_set_high(WRAP_POWER_LED_GPIO);
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
wrap_error_led_set(struct led_classdev * led_cdev,enum led_brightness value)35*4882a593Smuzhiyun static void wrap_error_led_set(struct led_classdev *led_cdev,
36*4882a593Smuzhiyun enum led_brightness value)
37*4882a593Smuzhiyun {
38*4882a593Smuzhiyun if (value)
39*4882a593Smuzhiyun scx200_gpio_set_low(WRAP_ERROR_LED_GPIO);
40*4882a593Smuzhiyun else
41*4882a593Smuzhiyun scx200_gpio_set_high(WRAP_ERROR_LED_GPIO);
42*4882a593Smuzhiyun }
43*4882a593Smuzhiyun
wrap_extra_led_set(struct led_classdev * led_cdev,enum led_brightness value)44*4882a593Smuzhiyun static void wrap_extra_led_set(struct led_classdev *led_cdev,
45*4882a593Smuzhiyun enum led_brightness value)
46*4882a593Smuzhiyun {
47*4882a593Smuzhiyun if (value)
48*4882a593Smuzhiyun scx200_gpio_set_low(WRAP_EXTRA_LED_GPIO);
49*4882a593Smuzhiyun else
50*4882a593Smuzhiyun scx200_gpio_set_high(WRAP_EXTRA_LED_GPIO);
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun static struct led_classdev wrap_power_led = {
54*4882a593Smuzhiyun .name = "wrap::power",
55*4882a593Smuzhiyun .brightness_set = wrap_power_led_set,
56*4882a593Smuzhiyun .default_trigger = "default-on",
57*4882a593Smuzhiyun .flags = LED_CORE_SUSPENDRESUME,
58*4882a593Smuzhiyun };
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun static struct led_classdev wrap_error_led = {
61*4882a593Smuzhiyun .name = "wrap::error",
62*4882a593Smuzhiyun .brightness_set = wrap_error_led_set,
63*4882a593Smuzhiyun .flags = LED_CORE_SUSPENDRESUME,
64*4882a593Smuzhiyun };
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun static struct led_classdev wrap_extra_led = {
67*4882a593Smuzhiyun .name = "wrap::extra",
68*4882a593Smuzhiyun .brightness_set = wrap_extra_led_set,
69*4882a593Smuzhiyun .flags = LED_CORE_SUSPENDRESUME,
70*4882a593Smuzhiyun };
71*4882a593Smuzhiyun
wrap_led_probe(struct platform_device * pdev)72*4882a593Smuzhiyun static int wrap_led_probe(struct platform_device *pdev)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun int ret;
75*4882a593Smuzhiyun
76*4882a593Smuzhiyun ret = devm_led_classdev_register(&pdev->dev, &wrap_power_led);
77*4882a593Smuzhiyun if (ret < 0)
78*4882a593Smuzhiyun return ret;
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun ret = devm_led_classdev_register(&pdev->dev, &wrap_error_led);
81*4882a593Smuzhiyun if (ret < 0)
82*4882a593Smuzhiyun return ret;
83*4882a593Smuzhiyun
84*4882a593Smuzhiyun return devm_led_classdev_register(&pdev->dev, &wrap_extra_led);
85*4882a593Smuzhiyun }
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun static struct platform_driver wrap_led_driver = {
88*4882a593Smuzhiyun .probe = wrap_led_probe,
89*4882a593Smuzhiyun .driver = {
90*4882a593Smuzhiyun .name = DRVNAME,
91*4882a593Smuzhiyun },
92*4882a593Smuzhiyun };
93*4882a593Smuzhiyun
wrap_led_init(void)94*4882a593Smuzhiyun static int __init wrap_led_init(void)
95*4882a593Smuzhiyun {
96*4882a593Smuzhiyun int ret;
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun if (!scx200_gpio_present()) {
99*4882a593Smuzhiyun ret = -ENODEV;
100*4882a593Smuzhiyun goto out;
101*4882a593Smuzhiyun }
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun ret = platform_driver_register(&wrap_led_driver);
104*4882a593Smuzhiyun if (ret < 0)
105*4882a593Smuzhiyun goto out;
106*4882a593Smuzhiyun
107*4882a593Smuzhiyun pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
108*4882a593Smuzhiyun if (IS_ERR(pdev)) {
109*4882a593Smuzhiyun ret = PTR_ERR(pdev);
110*4882a593Smuzhiyun platform_driver_unregister(&wrap_led_driver);
111*4882a593Smuzhiyun goto out;
112*4882a593Smuzhiyun }
113*4882a593Smuzhiyun
114*4882a593Smuzhiyun out:
115*4882a593Smuzhiyun return ret;
116*4882a593Smuzhiyun }
117*4882a593Smuzhiyun
wrap_led_exit(void)118*4882a593Smuzhiyun static void __exit wrap_led_exit(void)
119*4882a593Smuzhiyun {
120*4882a593Smuzhiyun platform_device_unregister(pdev);
121*4882a593Smuzhiyun platform_driver_unregister(&wrap_led_driver);
122*4882a593Smuzhiyun }
123*4882a593Smuzhiyun
124*4882a593Smuzhiyun module_init(wrap_led_init);
125*4882a593Smuzhiyun module_exit(wrap_led_exit);
126*4882a593Smuzhiyun
127*4882a593Smuzhiyun MODULE_AUTHOR("Kristian Kielhofner <kris@krisk.org>");
128*4882a593Smuzhiyun MODULE_DESCRIPTION("PCEngines WRAP LED driver");
129*4882a593Smuzhiyun MODULE_LICENSE("GPL");
130*4882a593Smuzhiyun
131