1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-only
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * LEDs driver for Soekris net48xx
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2006 Chris Boot <bootc@bootc.net>
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Based on leds-ams-delta.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/nsc_gpio.h>
17*4882a593Smuzhiyun #include <linux/scx200_gpio.h>
18*4882a593Smuzhiyun #include <linux/module.h>
19*4882a593Smuzhiyun
20*4882a593Smuzhiyun #define DRVNAME "net48xx-led"
21*4882a593Smuzhiyun #define NET48XX_ERROR_LED_GPIO 20
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun static struct platform_device *pdev;
24*4882a593Smuzhiyun
net48xx_error_led_set(struct led_classdev * led_cdev,enum led_brightness value)25*4882a593Smuzhiyun static void net48xx_error_led_set(struct led_classdev *led_cdev,
26*4882a593Smuzhiyun enum led_brightness value)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun scx200_gpio_ops.gpio_set(NET48XX_ERROR_LED_GPIO, value ? 1 : 0);
29*4882a593Smuzhiyun }
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun static struct led_classdev net48xx_error_led = {
32*4882a593Smuzhiyun .name = "net48xx::error",
33*4882a593Smuzhiyun .brightness_set = net48xx_error_led_set,
34*4882a593Smuzhiyun .flags = LED_CORE_SUSPENDRESUME,
35*4882a593Smuzhiyun };
36*4882a593Smuzhiyun
net48xx_led_probe(struct platform_device * pdev)37*4882a593Smuzhiyun static int net48xx_led_probe(struct platform_device *pdev)
38*4882a593Smuzhiyun {
39*4882a593Smuzhiyun return devm_led_classdev_register(&pdev->dev, &net48xx_error_led);
40*4882a593Smuzhiyun }
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun static struct platform_driver net48xx_led_driver = {
43*4882a593Smuzhiyun .probe = net48xx_led_probe,
44*4882a593Smuzhiyun .driver = {
45*4882a593Smuzhiyun .name = DRVNAME,
46*4882a593Smuzhiyun },
47*4882a593Smuzhiyun };
48*4882a593Smuzhiyun
net48xx_led_init(void)49*4882a593Smuzhiyun static int __init net48xx_led_init(void)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun int ret;
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun /* small hack, but scx200_gpio doesn't set .dev if the probe fails */
54*4882a593Smuzhiyun if (!scx200_gpio_ops.dev) {
55*4882a593Smuzhiyun ret = -ENODEV;
56*4882a593Smuzhiyun goto out;
57*4882a593Smuzhiyun }
58*4882a593Smuzhiyun
59*4882a593Smuzhiyun ret = platform_driver_register(&net48xx_led_driver);
60*4882a593Smuzhiyun if (ret < 0)
61*4882a593Smuzhiyun goto out;
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
64*4882a593Smuzhiyun if (IS_ERR(pdev)) {
65*4882a593Smuzhiyun ret = PTR_ERR(pdev);
66*4882a593Smuzhiyun platform_driver_unregister(&net48xx_led_driver);
67*4882a593Smuzhiyun goto out;
68*4882a593Smuzhiyun }
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun out:
71*4882a593Smuzhiyun return ret;
72*4882a593Smuzhiyun }
73*4882a593Smuzhiyun
net48xx_led_exit(void)74*4882a593Smuzhiyun static void __exit net48xx_led_exit(void)
75*4882a593Smuzhiyun {
76*4882a593Smuzhiyun platform_device_unregister(pdev);
77*4882a593Smuzhiyun platform_driver_unregister(&net48xx_led_driver);
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun module_init(net48xx_led_init);
81*4882a593Smuzhiyun module_exit(net48xx_led_exit);
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun MODULE_AUTHOR("Chris Boot <bootc@bootc.net>");
84*4882a593Smuzhiyun MODULE_DESCRIPTION("Soekris net48xx LED driver");
85*4882a593Smuzhiyun MODULE_LICENSE("GPL");
86*4882a593Smuzhiyun
87