| Richard Purdie | 4d3cb35 | 2006-03-31 02:31:10 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * linux/drivers/leds/locomo.c |
| 3 | * |
| 4 | * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License version 2 as |
| 8 | * published by the Free Software Foundation. |
| 9 | */ |
| 10 | |
| 11 | #include <linux/config.h> |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/init.h> |
| 14 | #include <linux/device.h> |
| 15 | #include <linux/leds.h> |
| 16 | |
| 17 | #include <asm/hardware.h> |
| 18 | #include <asm/hardware/locomo.h> |
| 19 | |
| 20 | static void locomoled_brightness_set(struct led_classdev *led_cdev, |
| 21 | enum led_brightness value, int offset) |
| 22 | { |
| 23 | struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->class_dev->dev); |
| 24 | unsigned long flags; |
| 25 | |
| 26 | local_irq_save(flags); |
| 27 | if (value) |
| 28 | locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset); |
| 29 | else |
| 30 | locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset); |
| 31 | local_irq_restore(flags); |
| 32 | } |
| 33 | |
| 34 | static void locomoled_brightness_set0(struct led_classdev *led_cdev, |
| 35 | enum led_brightness value) |
| 36 | { |
| 37 | locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0); |
| 38 | } |
| 39 | |
| 40 | static void locomoled_brightness_set1(struct led_classdev *led_cdev, |
| 41 | enum led_brightness value) |
| 42 | { |
| 43 | locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1); |
| 44 | } |
| 45 | |
| 46 | static struct led_classdev locomo_led0 = { |
| 47 | .name = "locomo:amber", |
| 48 | .brightness_set = locomoled_brightness_set0, |
| 49 | }; |
| 50 | |
| 51 | static struct led_classdev locomo_led1 = { |
| 52 | .name = "locomo:green", |
| 53 | .brightness_set = locomoled_brightness_set1, |
| 54 | }; |
| 55 | |
| 56 | static int locomoled_probe(struct locomo_dev *ldev) |
| 57 | { |
| 58 | int ret; |
| 59 | |
| 60 | ret = led_classdev_register(&ldev->dev, &locomo_led0); |
| 61 | if (ret < 0) |
| 62 | return ret; |
| 63 | |
| 64 | ret = led_classdev_register(&ldev->dev, &locomo_led1); |
| 65 | if (ret < 0) |
| 66 | led_classdev_unregister(&locomo_led0); |
| 67 | |
| 68 | return ret; |
| 69 | } |
| 70 | |
| 71 | static int locomoled_remove(struct locomo_dev *dev) |
| 72 | { |
| 73 | led_classdev_unregister(&locomo_led0); |
| 74 | led_classdev_unregister(&locomo_led1); |
| 75 | return 0; |
| 76 | } |
| 77 | |
| 78 | static struct locomo_driver locomoled_driver = { |
| 79 | .drv = { |
| 80 | .name = "locomoled" |
| 81 | }, |
| 82 | .devid = LOCOMO_DEVID_LED, |
| 83 | .probe = locomoled_probe, |
| 84 | .remove = locomoled_remove, |
| 85 | }; |
| 86 | |
| 87 | static int __init locomoled_init(void) |
| 88 | { |
| 89 | return locomo_driver_register(&locomoled_driver); |
| 90 | } |
| 91 | module_init(locomoled_init); |
| 92 | |
| 93 | MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>"); |
| 94 | MODULE_DESCRIPTION("Locomo LED driver"); |
| 95 | MODULE_LICENSE("GPL"); |