drivers/leds/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  * Copyright (C) 2015 Imagination Technologies, Inc.
   8  */
   9 #include <linux/kernel.h>
  10 #include <linux/module.h>
  11 #include <linux/init.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/leds.h>
  14 #include <linux/err.h>
  15 #include <linux/io.h>
  16
  17 #include <asm/mips-boards/sead3-addr.h>
  18
  19 static void sead3_pled_set(struct led_classdev *led_cdev,
  20                 enum led_brightness value)
  21 {
  22         writel(value, (void __iomem *)SEAD3_CPLD_P_LED);
  23 }
  24
  25 static void sead3_fled_set(struct led_classdev *led_cdev,
  26                 enum led_brightness value)
  27 {
  28         writel(value, (void __iomem *)SEAD3_CPLD_F_LED);
  29 }
  30
  31 static struct led_classdev sead3_pled = {
  32         .name           = "sead3::pled",
  33         .brightness_set = sead3_pled_set,
  34         .flags          = LED_CORE_SUSPENDRESUME,
  35 };
  36
  37 static struct led_classdev sead3_fled = {
  38         .name           = "sead3::fled",
  39         .brightness_set = sead3_fled_set,
  40         .flags          = LED_CORE_SUSPENDRESUME,
  41 };
  42
  43 static int sead3_led_probe(struct platform_device *pdev)
  44 {
  45         int ret;
  46
  47         ret = led_classdev_register(&pdev->dev, &sead3_pled);
  48         if (ret < 0)
  49                 return ret;
  50
  51         ret = led_classdev_register(&pdev->dev, &sead3_fled);
  52         if (ret < 0)
  53                 led_classdev_unregister(&sead3_pled);
  54
  55         return ret;
  56 }
  57
  58 static int sead3_led_remove(struct platform_device *pdev)
  59 {
  60         led_classdev_unregister(&sead3_pled);
  61         led_classdev_unregister(&sead3_fled);
  62
  63         return 0;
  64 }
  65
  66 static struct platform_driver sead3_led_driver = {
  67         .probe          = sead3_led_probe,
  68         .remove         = sead3_led_remove,
  69         .driver         = {
  70                 .name           = "sead3-led",
  71         },
  72 };
  73
  74 module_platform_driver(sead3_led_driver);
  75
  76 MODULE_AUTHOR("Kristian Kielhofner <kris@krisk.org>");
  77 MODULE_DESCRIPTION("SEAD3 LED driver");
  78 MODULE_LICENSE("GPL");