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/module.h>
  12#include <linux/kernel.h>
  13#include <linux/init.h>
  14#include <linux/platform_device.h>
  15#include <linux/leds.h>
  16#include <plat/board-ams-delta.h>
  17
  18/*
  19 * Our context
  20 */
  21struct ams_delta_led {
  22        struct led_classdev     cdev;
  23        u8                      bitmask;
  24};
  25
  26static void ams_delta_led_set(struct led_classdev *led_cdev,
  27                enum led_brightness value)
  28{
  29        struct ams_delta_led *led_dev =
  30                container_of(led_cdev, struct ams_delta_led, cdev);
  31
  32        if (value)
  33                ams_delta_latch1_write(led_dev->bitmask, led_dev->bitmask);
  34        else
  35                ams_delta_latch1_write(led_dev->bitmask, 0);
  36}
  37
  38static struct ams_delta_led ams_delta_leds[] = {
  39        {
  40                .cdev           = {
  41                        .name           = "ams-delta::camera",
  42                        .brightness_set = ams_delta_led_set,
  43                },
  44                .bitmask        = AMS_DELTA_LATCH1_LED_CAMERA,
  45        },
  46        {
  47                .cdev           = {
  48                        .name           = "ams-delta::advert",
  49                        .brightness_set = ams_delta_led_set,
  50                },
  51                .bitmask        = AMS_DELTA_LATCH1_LED_ADVERT,
  52        },
  53        {
  54                .cdev           = {
  55                        .name           = "ams-delta::email",
  56                        .brightness_set = ams_delta_led_set,
  57                },
  58                .bitmask        = AMS_DELTA_LATCH1_LED_EMAIL,
  59        },
  60        {
  61                .cdev           = {
  62                        .name           = "ams-delta::handsfree",
  63                        .brightness_set = ams_delta_led_set,
  64                },
  65                .bitmask        = AMS_DELTA_LATCH1_LED_HANDSFREE,
  66        },
  67        {
  68                .cdev           = {
  69                        .name           = "ams-delta::voicemail",
  70                        .brightness_set = ams_delta_led_set,
  71                },
  72                .bitmask        = AMS_DELTA_LATCH1_LED_VOICEMAIL,
  73        },
  74        {
  75                .cdev           = {
  76                        .name           = "ams-delta::voice",
  77                        .brightness_set = ams_delta_led_set,
  78                },
  79                .bitmask        = AMS_DELTA_LATCH1_LED_VOICE,
  80        },
  81};
  82
  83static int ams_delta_led_probe(struct platform_device *pdev)
  84{
  85        int i, ret;
  86
  87        for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++) {
  88                ams_delta_leds[i].cdev.flags |= LED_CORE_SUSPENDRESUME;
  89                ret = led_classdev_register(&pdev->dev,
  90                                &ams_delta_leds[i].cdev);
  91                if (ret < 0)
  92                        goto fail;
  93        }
  94
  95        return 0;
  96fail:
  97        while (--i >= 0)
  98                led_classdev_unregister(&ams_delta_leds[i].cdev);
  99        return ret;     
 100}
 101
 102static int ams_delta_led_remove(struct platform_device *pdev)
 103{
 104        int i;
 105
 106        for (i = 0; i < ARRAY_SIZE(ams_delta_leds); i++)
 107                led_classdev_unregister(&ams_delta_leds[i].cdev);
 108
 109        return 0;
 110}
 111
 112static struct platform_driver ams_delta_led_driver = {
 113        .probe          = ams_delta_led_probe,
 114        .remove         = ams_delta_led_remove,
 115        .driver         = {
 116                .name = "ams-delta-led",
 117                .owner = THIS_MODULE,
 118        },
 119};
 120
 121static int __init ams_delta_led_init(void)
 122{
 123        return platform_driver_register(&ams_delta_led_driver);
 124}
 125
 126static void __exit ams_delta_led_exit(void)
 127{
 128        platform_driver_unregister(&ams_delta_led_driver);
 129}
 130
 131module_init(ams_delta_led_init);
 132module_exit(ams_delta_led_exit);
 133
 134MODULE_AUTHOR("Jonathan McDowell <noodles@earth.li>");
 135MODULE_DESCRIPTION("Amstrad Delta LED driver");
 136MODULE_LICENSE("GPL");
 137MODULE_ALIAS("platform:ams-delta-led");
 138