// SPDX-License-Identifier: GPL-2.0-only
/*
 * LED Triggers Core
 * For the HP Jornada 620/660/680/690 handhelds
 *
 * Copyright 2008 Kristoffer Ericson <kristoffer.ericson@gmail.com>
 *     this driver is based on leds-spitz.c by Richard Purdie.
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <asm/hd64461.h>
#include <mach/hp6xx.h>

static void hp6xxled_green_set(struct led_classdev *led_cdev,
                               enum led_brightness value)
{
        u8 v8;

        v8 = inb(PKDR);
        if (value)
                outb(v8 & (~PKDR_LED_GREEN), PKDR);
        else
                outb(v8 | PKDR_LED_GREEN, PKDR);
}

static void hp6xxled_red_set(struct led_classdev *led_cdev,
                             enum led_brightness value)
{
        u16 v16;

        v16 = inw(HD64461_GPBDR);
        if (value)
                outw(v16 & (~HD64461_GPBDR_LED_RED), HD64461_GPBDR);
        else
                outw(v16 | HD64461_GPBDR_LED_RED, HD64461_GPBDR);
}

static struct led_classdev hp6xx_red_led = {
        .name                   = "hp6xx:red",
        .default_trigger        = "hp6xx-charge",
        .brightness_set         = hp6xxled_red_set,
        .flags                  = LED_CORE_SUSPENDRESUME,
};

static struct led_classdev hp6xx_green_led = {
        .name                   = "hp6xx:green",
        .default_trigger        = "disk-activity",
        .brightness_set         = hp6xxled_green_set,
        .flags                  = LED_CORE_SUSPENDRESUME,
};

static int hp6xxled_probe(struct platform_device *pdev)
{
        int ret;

        ret = devm_led_classdev_register(&pdev->dev, &hp6xx_red_led);
        if (ret < 0)
                return ret;

        return devm_led_classdev_register(&pdev->dev, &hp6xx_green_led);
}

static struct platform_driver hp6xxled_driver = {
        .probe          = hp6xxled_probe,
        .driver         = {
                .name           = "hp6xx-led",
        },
};

module_platform_driver(hp6xxled_driver);

MODULE_AUTHOR("Kristoffer Ericson <kristoffer.ericson@gmail.com>");
MODULE_DESCRIPTION("HP Jornada 6xx LED driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:hp6xx-led");