// SPDX-License-Identifier: GPL-2.0-only

  /*
   * LEDs driver for Soekris net48xx
   *
   * Copyright (C) 2006 Chris Boot <bootc@bootc.net>
   *
   * Based on leds-ams-delta.c

   */
  
  #include <linux/kernel.h>
  #include <linux/init.h>
  #include <linux/platform_device.h>
  #include <linux/leds.h>
  #include <linux/err.h>

  #include <linux/io.h>

  #include <linux/nsc_gpio.h>

  #include <linux/scx200_gpio.h>

  #include <linux/module.h>

  #define DRVNAME "net48xx-led"

  #define NET48XX_ERROR_LED_GPIO	20
  
  static struct platform_device *pdev;
  
  static void net48xx_error_led_set(struct led_classdev *led_cdev,
  		enum led_brightness value)
  {

  	scx200_gpio_ops.gpio_set(NET48XX_ERROR_LED_GPIO, value ? 1 : 0);

  }
  
  static struct led_classdev net48xx_error_led = {

  	.name		= "net48xx::error",

  	.brightness_set	= net48xx_error_led_set,

  	.flags		= LED_CORE_SUSPENDRESUME,

  };

  static int net48xx_led_probe(struct platform_device *pdev)
  {

  	return devm_led_classdev_register(&pdev->dev, &net48xx_error_led);

  }
  
  static struct platform_driver net48xx_led_driver = {

  	.probe		= net48xx_led_probe,

  	.driver		= {

  		.name		= DRVNAME,

  	},
  };
  
  static int __init net48xx_led_init(void)
  {
  	int ret;

  	/* small hack, but scx200_gpio doesn't set .dev if the probe fails */
  	if (!scx200_gpio_ops.dev) {

  		ret = -ENODEV;
  		goto out;
  	}
  
  	ret = platform_driver_register(&net48xx_led_driver);
  	if (ret < 0)
  		goto out;

  	pdev = platform_device_register_simple(DRVNAME, -1, NULL, 0);

  	if (IS_ERR(pdev)) {
  		ret = PTR_ERR(pdev);
  		platform_driver_unregister(&net48xx_led_driver);
  		goto out;
  	}
  
  out:
  	return ret;
  }
  
  static void __exit net48xx_led_exit(void)
  {
  	platform_device_unregister(pdev);
  	platform_driver_unregister(&net48xx_led_driver);
  }
  
  module_init(net48xx_led_init);
  module_exit(net48xx_led_exit);
  
  MODULE_AUTHOR("Chris Boot <bootc@bootc.net>");
  MODULE_DESCRIPTION("Soekris net48xx LED driver");
  MODULE_LICENSE("GPL");