// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * TSC2005 touchscreen driver
 *
 * Copyright (C) 2006-2010 Nokia Corporation
 * Copyright (C) 2015 QWERTY Embedded Design
 * Copyright (C) 2015 EMAC Inc.
 *
 * Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com>
 */

#include <linux/input.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include "tsc200x-core.h"

static const struct input_id tsc2005_input_id = {
        .bustype = BUS_SPI,
        .product = 2005,
};

static int tsc2005_cmd(struct device *dev, u8 cmd)
{
        u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
        struct spi_transfer xfer = {
                .tx_buf         = &tx,
                .len            = 1,
                .bits_per_word  = 8,
        };
        struct spi_message msg;
        struct spi_device *spi = to_spi_device(dev);
        int error;

        spi_message_init(&msg);
        spi_message_add_tail(&xfer, &msg);

        error = spi_sync(spi, &msg);
        if (error) {
                dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
                        __func__, cmd, error);
                return error;
        }

        return 0;
}

static int tsc2005_probe(struct spi_device *spi)
{
        int error;

        spi->mode = SPI_MODE_0;
        spi->bits_per_word = 8;
        if (!spi->max_speed_hz)
                spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;

        error = spi_setup(spi);
        if (error)
                return error;

        return tsc200x_probe(&spi->dev, spi->irq, &tsc2005_input_id,
                             devm_regmap_init_spi(spi, &tsc200x_regmap_config),
                             tsc2005_cmd);
}

#ifdef CONFIG_OF
static const struct of_device_id tsc2005_of_match[] = {
        { .compatible = "ti,tsc2005" },
        { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, tsc2005_of_match);
#endif

static struct spi_driver tsc2005_driver = {
        .driver = {
                .name           = "tsc2005",
                .dev_groups     = tsc200x_groups,
                .of_match_table = of_match_ptr(tsc2005_of_match),
                .pm             = pm_sleep_ptr(&tsc200x_pm_ops),
        },
        .probe  = tsc2005_probe,
};
module_spi_driver(tsc2005_driver);

MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("spi:tsc2005");