arch/mips/mti-sead3/leds-sead3.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2012 MIPS Technologies, Inc.  All rights reserved.
   7  */
   8 #include <linux/kernel.h>
   9 #include <linux/module.h>
  10 #include <linux/init.h>
  11 #include <linux/platform_device.h>
  12 #include <linux/leds.h>
  13 #include <linux/err.h>
  14 #include <linux/io.h>
  15
  16 #define DRVNAME "sead3-led"
  17
  18 static struct platform_device *pdev;
  19
  20 static void sead3_pled_set(struct led_classdev *led_cdev,
  21                 enum led_brightness value)
  22 {
  23         pr_debug("sead3_pled_set\n");
  24         writel(value, (void __iomem *)0xBF000210);      /* FIXME */
  25 }
  26
  27 static void sead3_fled_set(struct led_classdev *led_cdev,
  28                 enum led_brightness value)
  29 {
  30         pr_debug("sead3_fled_set\n");
  31         writel(value, (void __iomem *)0xBF000218);      /* FIXME */
  32 }
  33
  34 static struct led_classdev sead3_pled = {
  35         .name           = "sead3::pled",
  36         .brightness_set = sead3_pled_set,
  37         .flags          = LED_CORE_SUSPENDRESUME,
  38 };
  39
  40 static struct led_classdev sead3_fled = {
  41         .name           = "sead3::fled",
  42         .brightness_set = sead3_fled_set,
  43         .flags          = LED_CORE_SUSPENDRESUME,
  44 };
  45
  46 static int sead3_led_probe(struct platform_device *pdev)
  47 {
  48         int ret;
  49
  50         ret = led_classdev_register(&pdev->dev, &sead3_pled);
  51         if (ret < 0)
  52                 return ret;
  53
  54         ret = led_classdev_register(&pdev->dev, &sead3_fled);
  55         if (ret < 0)
  56                 led_classdev_unregister(&sead3_pled);
  57
  58         return ret;
  59 }
  60
  61 static int sead3_led_remove(struct platform_device *pdev)
  62 {
  63         led_classdev_unregister(&sead3_pled);
  64         led_classdev_unregister(&sead3_fled);
  65         return 0;
  66 }
  67
  68 static struct platform_driver sead3_led_driver = {
  69         .probe          = sead3_led_probe,
  70         .remove         = sead3_led_remove,
  71         .driver         = {
  72                 .name           = DRVNAME,
  73                 .owner          = THIS_MODULE,
  74         },
  75 };
  76
  77 static int __init sead3_led_init(void)
  78 {
  79         int ret;
  80
  81         ret = platform_driver_register(&sead3_led_driver);
  82         if (ret < 0)
  83                 goto out;
  84
  85         pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);
  86         if (IS_ERR(pdev)) {
  87                 ret = PTR_ERR(pdev);
  88                 platform_driver_unregister(&sead3_led_driver);
  89                 goto out;
  90         }
  91
  92 out:
  93         return ret;
  94 }
  95
  96 static void __exit sead3_led_exit(void)
  97 {
  98         platform_device_unregister(pdev);
  99         platform_driver_unregister(&sead3_led_driver);
 100 }
 101
 102 module_init(sead3_led_init);
 103 module_exit(sead3_led_exit);
 104
 105 MODULE_AUTHOR("Kristian Kielhofner <kris@krisk.org>");
 106 MODULE_DESCRIPTION("SEAD3 LED driver");
 107 MODULE_LICENSE("GPL");