drivers/leds/leds-locomo.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * linux/drivers/leds/leds-locomo.c
   4  *
   5  * Copyright (C) 2005 John Lenz <lenz@cs.wisc.edu>
   6  */
   7
   8 #include <linux/kernel.h>
   9 #include <linux/init.h>
  10 #include <linux/module.h>
  11 #include <linux/device.h>
  12 #include <linux/leds.h>
  13
  14 #include <mach/hardware.h>
  15 #include <asm/hardware/locomo.h>
  16
  17 static void locomoled_brightness_set(struct led_classdev *led_cdev,
  18                                 enum led_brightness value, int offset)
  19 {
  20         struct locomo_dev *locomo_dev = LOCOMO_DEV(led_cdev->dev->parent);
  21         unsigned long flags;
  22
  23         local_irq_save(flags);
  24         if (value)
  25                 locomo_writel(LOCOMO_LPT_TOFH, locomo_dev->mapbase + offset);
  26         else
  27                 locomo_writel(LOCOMO_LPT_TOFL, locomo_dev->mapbase + offset);
  28         local_irq_restore(flags);
  29 }
  30
  31 static void locomoled_brightness_set0(struct led_classdev *led_cdev,
  32                                 enum led_brightness value)
  33 {
  34         locomoled_brightness_set(led_cdev, value, LOCOMO_LPT0);
  35 }
  36
  37 static void locomoled_brightness_set1(struct led_classdev *led_cdev,
  38                                 enum led_brightness value)
  39 {
  40         locomoled_brightness_set(led_cdev, value, LOCOMO_LPT1);
  41 }
  42
  43 static struct led_classdev locomo_led0 = {
  44         .name                   = "locomo:amber:charge",
  45         .default_trigger        = "main-battery-charging",
  46         .brightness_set         = locomoled_brightness_set0,
  47 };
  48
  49 static struct led_classdev locomo_led1 = {
  50         .name                   = "locomo:green:mail",
  51         .default_trigger        = "nand-disk",
  52         .brightness_set         = locomoled_brightness_set1,
  53 };
  54
  55 static int locomoled_probe(struct locomo_dev *ldev)
  56 {
  57         int ret;
  58
  59         ret = devm_led_classdev_register(&ldev->dev, &locomo_led0);
  60         if (ret < 0)
  61                 return ret;
  62
  63         return  devm_led_classdev_register(&ldev->dev, &locomo_led1);
  64 }
  65
  66
  67 static struct locomo_driver locomoled_driver = {
  68         .drv = {
  69                 .name = "locomoled"
  70         },
  71         .devid  = LOCOMO_DEVID_LED,
  72         .probe  = locomoled_probe,
  73 };
  74
  75 static int __init locomoled_init(void)
  76 {
  77         return locomo_driver_register(&locomoled_driver);
  78 }
  79 module_init(locomoled_init);
  80
  81 MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
  82 MODULE_DESCRIPTION("Locomo LED driver");
  83 MODULE_LICENSE("GPL");