// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright 2006 - Florian Fainelli <florian@openwrt.org>
 *
 * Control the Cobalt Qube/RaQ front LED
 */
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/types.h>

#define LED_FRONT_LEFT  0x01
#define LED_FRONT_RIGHT 0x02

static void __iomem *led_port;
static u8 led_value;

static void qube_front_led_set(struct led_classdev *led_cdev,
                               enum led_brightness brightness)
{
        if (brightness)
                led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
        else
                led_value = ~(LED_FRONT_LEFT | LED_FRONT_RIGHT);
        writeb(led_value, led_port);
}

static struct led_classdev qube_front_led = {
        .name                   = "qube::front",
        .brightness             = LED_FULL,
        .brightness_set         = qube_front_led_set,
        .default_trigger        = "default-on",
};

static int cobalt_qube_led_probe(struct platform_device *pdev)
{
        struct resource *res;

        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!res)
                return -EBUSY;

        led_port = devm_ioremap(&pdev->dev, res->start, resource_size(res));
        if (!led_port)
                return -ENOMEM;

        led_value = LED_FRONT_LEFT | LED_FRONT_RIGHT;
        writeb(led_value, led_port);

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

static struct platform_driver cobalt_qube_led_driver = {
        .probe  = cobalt_qube_led_probe,
        .driver = {
                .name   = "cobalt-qube-leds",
        },
};

module_platform_driver(cobalt_qube_led_driver);

MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Front LED support for Cobalt Server");
MODULE_AUTHOR("Florian Fainelli <florian@openwrt.org>");
MODULE_ALIAS("platform:cobalt-qube-leds");