projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1a87d942 CB |
1 | /* |
| 2 | * LEDs driver for Soekris net48xx | |
| 3 | * | |
| 4 | * Copyright (C) 2006 Chris Boot <[email protected]> | |
| 5 | * | |
| 6 | * Based on leds-ams-delta.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 <asm/io.h> | |
| 19 | #include <linux/scx200_gpio.h> | |
| 20 | ||
| 21 | #define NET48XX_ERROR_LED_GPIO 20 | |
| 22 | ||
| 23 | static struct platform_device *pdev; | |
| 24 | ||
| 25 | static void net48xx_error_led_set(struct led_classdev *led_cdev, | |
| 26 | enum led_brightness value) | |
| 27 | { | |
| 28 | if (value) | |
| 29 | scx200_gpio_set_high(NET48XX_ERROR_LED_GPIO); | |
| 30 | else | |
| 31 | scx200_gpio_set_low(NET48XX_ERROR_LED_GPIO); | |
| 32 | } | |
| 33 | ||
| 34 | static struct led_classdev net48xx_error_led = { | |
| 35 | .name = "net48xx:error", | |
| 36 | .brightness_set = net48xx_error_led_set, | |
| 37 | }; | |
| 38 | ||
| 39 | #ifdef CONFIG_PM | |
| 40 | static int net48xx_led_suspend(struct platform_device *dev, | |
| 41 | pm_message_t state) | |
| 42 | { | |
| 43 | led_classdev_suspend(&net48xx_error_led); | |
| 44 | return 0; | |
| 45 | } | |
| 46 | ||
| 47 | static int net48xx_led_resume(struct platform_device *dev) | |
| 48 | { | |
| 49 | led_classdev_resume(&net48xx_error_led); | |
| 50 | return 0; | |
| 51 | } | |
| 52 | #else | |
| 53 | #define net48xx_led_suspend NULL | |
| 54 | #define net48xx_led_resume NULL | |
| 55 | #endif | |
| 56 | ||
| 57 | static int net48xx_led_probe(struct platform_device *pdev) | |
| 58 | { | |
| 59 | return led_classdev_register(&pdev->dev, &net48xx_error_led); | |
| 60 | } | |
| 61 | ||
| 62 | static int net48xx_led_remove(struct platform_device *pdev) | |
| 63 | { | |
| 64 | led_classdev_unregister(&net48xx_error_led); | |
| 65 | return 0; | |
| 66 | } | |
| 67 | ||
| 68 | static struct platform_driver net48xx_led_driver = { | |
| 69 | .driver.owner = THIS_MODULE, | |
| 70 | .probe = net48xx_led_probe, | |
| 71 | .remove = net48xx_led_remove, | |
| 72 | .suspend = net48xx_led_suspend, | |
| 73 | .resume = net48xx_led_resume, | |
| 74 | .driver = { | |
| 75 | .name = "net48xx-led", | |
| 76 | }, | |
| 77 | }; | |
| 78 | ||
| 79 | static int __init net48xx_led_init(void) | |
| 80 | { | |
| 81 | int ret; | |
| 82 | ||
| 83 | if (!scx200_gpio_present()) { | |
| 84 | ret = -ENODEV; | |
| 85 | goto out; | |
| 86 | } | |
| 87 | ||
| 88 | ret = platform_driver_register(&net48xx_led_driver); | |
| 89 | if (ret < 0) | |
| 90 | goto out; | |
| 91 | ||
| 92 | pdev = platform_device_register_simple("net48xx-led", -1, NULL, 0); | |
| 93 | if (IS_ERR(pdev)) { | |
| 94 | ret = PTR_ERR(pdev); | |
| 95 | platform_driver_unregister(&net48xx_led_driver); | |
| 96 | goto out; | |
| 97 | } | |
| 98 | ||
| 99 | out: | |
| 100 | return ret; | |
| 101 | } | |
| 102 | ||
| 103 | static void __exit net48xx_led_exit(void) | |
| 104 | { | |
| 105 | platform_device_unregister(pdev); | |
| 106 | platform_driver_unregister(&net48xx_led_driver); | |
| 107 | } | |
| 108 | ||
| 109 | module_init(net48xx_led_init); | |
| 110 | module_exit(net48xx_led_exit); | |
| 111 | ||
| 112 | MODULE_AUTHOR("Chris Boot <[email protected]>"); | |
| 113 | MODULE_DESCRIPTION("Soekris net48xx LED driver"); | |
| 114 | MODULE_LICENSE("GPL"); | |
| 115 |