1/* 2 * LEDs driver for PCEngines WRAP 3 * 4 * Copyright (C) 2006 Kristian Kielhofner <kris@krisk.org> 5 * 6 * Based on leds-net48xx.c 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13#include <linux/kernel.h> 14#include <linux/init.h> 15#include <linux/platform_device.h> 16#include <linux/leds.h> 17#include <linux/err.h> 18#include <linux/io.h> 19#include <linux/scx200_gpio.h> 20#include <linux/module.h> 21 22#define DRVNAME "wrap-led" 23#define WRAP_POWER_LED_GPIO 2 24#define WRAP_ERROR_LED_GPIO 3 25#define WRAP_EXTRA_LED_GPIO 18 26 27static struct platform_device *pdev; 28 29static void wrap_power_led_set(struct led_classdev *led_cdev, 30 enum led_brightness value) 31{ 32 if (value) 33 scx200_gpio_set_low(WRAP_POWER_LED_GPIO); 34 else 35 scx200_gpio_set_high(WRAP_POWER_LED_GPIO); 36} 37 38static void wrap_error_led_set(struct led_classdev *led_cdev, 39 enum led_brightness value) 40{ 41 if (value) 42 scx200_gpio_set_low(WRAP_ERROR_LED_GPIO); 43 else 44 scx200_gpio_set_high(WRAP_ERROR_LED_GPIO); 45} 46 47static void wrap_extra_led_set(struct led_classdev *led_cdev, 48 enum led_brightness value) 49{ 50 if (value) 51 scx200_gpio_set_low(WRAP_EXTRA_LED_GPIO); 52 else 53 scx200_gpio_set_high(WRAP_EXTRA_LED_GPIO); 54} 55 56static struct led_classdev wrap_power_led = { 57 .name = "wrap::power", 58 .brightness_set = wrap_power_led_set, 59 .default_trigger = "default-on", 60 .flags = LED_CORE_SUSPENDRESUME, 61}; 62 63static struct led_classdev wrap_error_led = { 64 .name = "wrap::error", 65 .brightness_set = wrap_error_led_set, 66 .flags = LED_CORE_SUSPENDRESUME, 67}; 68 69static struct led_classdev wrap_extra_led = { 70 .name = "wrap::extra", 71 .brightness_set = wrap_extra_led_set, 72 .flags = LED_CORE_SUSPENDRESUME, 73}; 74 75static int wrap_led_probe(struct platform_device *pdev) 76{ 77 int ret; 78 79 ret = led_classdev_register(&pdev->dev, &wrap_power_led); 80 if (ret < 0) 81 return ret; 82 83 ret = led_classdev_register(&pdev->dev, &wrap_error_led); 84 if (ret < 0) 85 goto err1; 86 87 ret = led_classdev_register(&pdev->dev, &wrap_extra_led); 88 if (ret < 0) 89 goto err2; 90 91 return ret; 92 93err2: 94 led_classdev_unregister(&wrap_error_led); 95err1: 96 led_classdev_unregister(&wrap_power_led); 97 98 return ret; 99} 100 101static int wrap_led_remove(struct platform_device *pdev) 102{ 103 led_classdev_unregister(&wrap_power_led); 104 led_classdev_unregister(&wrap_error_led); 105 led_classdev_unregister(&wrap_extra_led); 106 return 0; 107} 108 109static struct platform_driver wrap_led_driver = { 110 .probe = wrap_led_probe, 111 .remove = wrap_led_remove, 112 .driver = { 113 .name = DRVNAME, 114 .owner = THIS_MODULE, 115 }, 116}; 117 118static int __init wrap_led_init(void) 119{ 120 int ret; 121 122 if (!scx200_gpio_present()) { 123 ret = -ENODEV; 124 goto out; 125 } 126 127 ret = platform_driver_register(&wrap_led_driver); 128 if (ret < 0) 129 goto out; 130 131 pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0); 132 if (IS_ERR(pdev)) { 133 ret = PTR_ERR(pdev); 134 platform_driver_unregister(&wrap_led_driver); 135 goto out; 136 } 137 138out: 139 return ret; 140} 141 142static void __exit wrap_led_exit(void) 143{ 144 platform_device_unregister(pdev); 145 platform_driver_unregister(&wrap_led_driver); 146} 147 148module_init(wrap_led_init); 149module_exit(wrap_led_exit); 150 151MODULE_AUTHOR("Kristian Kielhofner <kris@krisk.org>"); 152MODULE_DESCRIPTION("PCEngines WRAP LED driver"); 153MODULE_LICENSE("GPL"); 154 155