LXR linux/drivers/leds/leds-ams-delta.c

   1/*
   2 * LEDs driver for Amstrad Delta (E3)
   3 *
   4 * Copyright (C) 2006 Jonathan McDowell <noodles@earth.li>
   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/kernel.h>
  12#include <linux/init.h>
  13#include <linux/platform_device.h>
  14#include <linux/leds.h>
  15#include <mach/board-ams-delta.h>
  16
  17/*
  18 * Our context
  19 */
  20struct ams_delta_led {
  21        struct led_classdev     cdev;
  22        u8                      bitmask;
  23};
  24
  25static void ams_delta_led_set(struct led_classdev *led_cdev,
  26                enum led_brightness value)
  27{
  28        struct ams_delta_led *led_dev =
  29                container_of(led_cdev, struct ams_delta_led, cdev);
  30
  31        if (value)
  32                ams_delta_latch1_write(led_dev->bitmask, led_dev->bitmask);
  33        else
  34                ams_delta_latch1_write(led_dev->bitmask, 0);
  35}
  36
  37static struct ams_delta_led ams_delta_leds[] = {
  38        {
  39                .cdev           = {
  40                        .name           = "ams-delta::camera",
  41                        .brightness_set = ams_delta_led_set,
  42                },
  43                .bitmask        = AMS_DELTA_LATCH1_LED_CAMERA,
  44        },
  45        {
  46                .cdev           = {
  47                        .name           = "ams-delta::advert",
  48                        .brightness_set = ams_delta_led_set,
  49                },
  50                .bitmask        = AMS_DELTA_LATCH1_LED_ADVERT,
  51        },
  52        {
  53                .cdev           = {
  54                        .name           = "ams-delta::email",
  55                        .brightness_set = ams_delta_led_set,
  56                },
  57                .bitmask        = AMS_DELTA_LATCH1_LED_EMAIL,
  58        },
  59        {
  60                .cdev           = {
  61                        .name           = "ams-delta::handsfree",
  62                        .brightness_set = ams_delta_led_set,
  63                },
  64                .bitmask        = AMS_DELTA_LATCH1_LED_HANDSFREE,
  65        },
  66        {
  67                .cdev           = {
  68                        .name           = "ams-delta::voicemail",
  69                        .brightness_set = ams_delta_led_set,
  70                },
  71                .bitmask        = AMS_DELTA_LATCH1_LED_VOICEMAIL,
  72        },
  73        {
  74                .cdev           = {
  75                        .name           = "ams-delta::voice",
  76                        .brightness_set = ams_delta_led_set,
  77                },
  78                .bitmask        = AMS_DELTA_LATCH1_LED_VOICE,
  79        },
  80};
  81
  82static int ams_delta_led_probe(struct platform_device *pdev)
  83{
  84        int i, ret;
  85
  86        for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++) {
  87                ams_delta_leds[i].cdev.flags |= LED_CORE_SUSPENDRESUME;
  88                ret = led_classdev_register(&pdev->dev,
  89                                &ams_delta_leds[i].cdev);
  90                if (ret < 0)
  91                        goto fail;
  92        }
  93
  94        return 0;
  95fail:
  96        while (--i >= 0)
  97                led_classdev_unregister(&ams_delta_leds[i].cdev);
  98        return ret;     
  99}
 100
 101static int ams_delta_led_remove(struct platform_device *pdev)
 102{
 103        int i;
 104
 105        for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
 106                led_classdev_unregister(&ams_delta_leds[i].cdev);
 107
 108        return 0;
 109}
 110
 111static struct platform_driver ams_delta_led_driver = {
 112        .probe          = ams_delta_led_probe,
 113        .remove         = ams_delta_led_remove,
 114        .driver         = {
 115                .name = "ams-delta-led",
 116                .owner = THIS_MODULE,
 117        },
 118};
 119
 120static int __init ams_delta_led_init(void)
 121{
 122        return platform_driver_register(&ams_delta_led_driver);
 123}
 124
 125static void __exit ams_delta_led_exit(void)
 126{
 127        platform_driver_unregister(&ams_delta_led_driver);
 128}
 129
 130module_init(ams_delta_led_init);
 131module_exit(ams_delta_led_exit);
 132
 133MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");
 134MODULE_DESCRIPTION("Amstrad Delta LED driver");
 135MODULE_LICENSE("GPL");
 136MODULE_ALIAS("platform:ams-delta-led");
 137