LXR linux/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
  17static 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
  31static 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
  37static 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
  43static struct led_classdev locomo_led0 = {
  44        .name                   = "locomo:amber:charge",
  45        .default_trigger        = "main-battery-charging",
  46        .brightness_set         = locomoled_brightness_set0,
  47};
  48
  49static struct led_classdev locomo_led1 = {
  50        .name                   = "locomo:green:mail",
  51        .default_trigger        = "nand-disk",
  52        .brightness_set         = locomoled_brightness_set1,
  53};
  54
  55static 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
  67static struct locomo_driver locomoled_driver = {
  68        .drv = {
  69                .name = "locomoled"
  70        },
  71        .devid  = LOCOMO_DEVID_LED,
  72        .probe  = locomoled_probe,
  73};
  74
  75static int __init locomoled_init(void)
  76{
  77        return locomo_driver_register(&locomoled_driver);
  78}
  79module_init(locomoled_init);
  80
  81MODULE_AUTHOR("John Lenz <lenz@cs.wisc.edu>");
  82MODULE_DESCRIPTION("Locomo LED driver");
  83MODULE_LICENSE("GPL");
  84