95 lines
2.1 KiB
C
95 lines
2.1 KiB
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* TSC2005 touchscreen driver
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*
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* Copyright (C) 2006-2010 Nokia Corporation
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* Copyright (C) 2015 QWERTY Embedded Design
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* Copyright (C) 2015 EMAC Inc.
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*
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* Based on original tsc2005.c by Lauri Leukkunen <lauri.leukkunen@nokia.com>
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*/
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#include <linux/input.h>
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#include <linux/module.h>
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#include <linux/of.h>
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#include <linux/spi/spi.h>
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#include <linux/regmap.h>
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#include "tsc200x-core.h"
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static const struct input_id tsc2005_input_id = {
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.bustype = BUS_SPI,
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.product = 2005,
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};
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static int tsc2005_cmd(struct device *dev, u8 cmd)
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{
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u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
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struct spi_transfer xfer = {
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.tx_buf = &tx,
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.len = 1,
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.bits_per_word = 8,
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};
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struct spi_message msg;
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struct spi_device *spi = to_spi_device(dev);
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int error;
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spi_message_init(&msg);
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spi_message_add_tail(&xfer, &msg);
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error = spi_sync(spi, &msg);
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if (error) {
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dev_err(dev, "%s: failed, command: %x, spi error: %d\n",
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__func__, cmd, error);
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return error;
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}
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return 0;
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}
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static int tsc2005_probe(struct spi_device *spi)
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{
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int error;
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spi->mode = SPI_MODE_0;
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spi->bits_per_word = 8;
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if (!spi->max_speed_hz)
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spi->max_speed_hz = TSC2005_SPI_MAX_SPEED_HZ;
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error = spi_setup(spi);
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if (error)
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return error;
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return tsc200x_probe(&spi->dev, spi->irq, &tsc2005_input_id,
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devm_regmap_init_spi(spi, &tsc200x_regmap_config),
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tsc2005_cmd);
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}
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static int tsc2005_remove(struct spi_device *spi)
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{
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return tsc200x_remove(&spi->dev);
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}
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#ifdef CONFIG_OF
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static const struct of_device_id tsc2005_of_match[] = {
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{ .compatible = "ti,tsc2005" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, tsc2005_of_match);
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#endif
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static struct spi_driver tsc2005_driver = {
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.driver = {
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.name = "tsc2005",
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.of_match_table = of_match_ptr(tsc2005_of_match),
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.pm = &tsc200x_pm_ops,
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},
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.probe = tsc2005_probe,
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.remove = tsc2005_remove,
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};
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module_spi_driver(tsc2005_driver);
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MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
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MODULE_DESCRIPTION("TSC2005 Touchscreen Driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("spi:tsc2005");
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