// SPDX-License-Identifier: GPL-2.0
/*
 * Siemens SIMATIC IPC driver for GPIO based LEDs
 *
 * Copyright (c) Siemens AG, 2023
 *
 * Author:
 *  Henning Schild <henning.schild@siemens.com>
 */

#include <linux/gpio/machine.h>
#include <linux/gpio/consumer.h>
#include <linux/leds.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/platform_data/x86/simatic-ipc-base.h>

#include "simatic-ipc-leds-gpio.h"

static struct platform_device *simatic_leds_pdev;

static const struct gpio_led simatic_ipc_gpio_leds[] = {
        { .name = "red:" LED_FUNCTION_STATUS "-1" },
        { .name = "green:" LED_FUNCTION_STATUS "-1" },
        { .name = "red:" LED_FUNCTION_STATUS "-2" },
        { .name = "green:" LED_FUNCTION_STATUS "-2" },
        { .name = "red:" LED_FUNCTION_STATUS "-3" },
        { .name = "green:" LED_FUNCTION_STATUS "-3" },
};

static const struct gpio_led_platform_data simatic_ipc_gpio_leds_pdata = {
        .num_leds       = ARRAY_SIZE(simatic_ipc_gpio_leds),
        .leds           = simatic_ipc_gpio_leds,
};

void simatic_ipc_leds_gpio_remove(struct platform_device *pdev,
                                 struct gpiod_lookup_table *table,
                                 struct gpiod_lookup_table *table_extra)
{
        gpiod_remove_lookup_table(table);
        gpiod_remove_lookup_table(table_extra);
        platform_device_unregister(simatic_leds_pdev);
}
EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_remove);

int simatic_ipc_leds_gpio_probe(struct platform_device *pdev,
                                struct gpiod_lookup_table *table,
                                struct gpiod_lookup_table *table_extra)
{
        const struct simatic_ipc_platform *plat = pdev->dev.platform_data;
        struct device *dev = &pdev->dev;
        struct gpio_desc *gpiod;
        int err;

        switch (plat->devmode) {
        case SIMATIC_IPC_DEVICE_127E:
        case SIMATIC_IPC_DEVICE_227G:
        case SIMATIC_IPC_DEVICE_BX_21A:
        case SIMATIC_IPC_DEVICE_BX_59A:
                break;
        default:
                return -ENODEV;
        }

        gpiod_add_lookup_table(table);
        simatic_leds_pdev = platform_device_register_resndata(NULL,
                "leds-gpio", PLATFORM_DEVID_NONE, NULL, 0,
                &simatic_ipc_gpio_leds_pdata,
                sizeof(simatic_ipc_gpio_leds_pdata));
        if (IS_ERR(simatic_leds_pdev)) {
                err = PTR_ERR(simatic_leds_pdev);
                goto out;
        }

        if (!table_extra)
                return 0;

        table_extra->dev_id = dev_name(dev);
        gpiod_add_lookup_table(table_extra);

        /* PM_BIOS_BOOT_N */
        gpiod = gpiod_get_index(dev, NULL, 6, GPIOD_OUT_LOW);
        if (IS_ERR(gpiod)) {
                err = PTR_ERR(gpiod);
                goto out;
        }
        gpiod_put(gpiod);

        /* PM_WDT_OUT */
        gpiod = gpiod_get_index(dev, NULL, 7, GPIOD_OUT_LOW);
        if (IS_ERR(gpiod)) {
                err = PTR_ERR(gpiod);
                goto out;
        }
        gpiod_put(gpiod);

        return 0;
out:
        simatic_ipc_leds_gpio_remove(pdev, table, table_extra);

        return err;
}
EXPORT_SYMBOL_GPL(simatic_ipc_leds_gpio_probe);

MODULE_DESCRIPTION("Siemens SIMATIC IPC core driver for GPIO based LEDs");
MODULE_LICENSE("GPL v2");
MODULE_SOFTDEP("pre: platform:leds-gpio");
MODULE_AUTHOR("Henning Schild <henning.schild@siemens.com>");