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39e4e75a9f
Up to now tsc200x_remove() returns zero unconditionally. Make it return void instead which makes it easier to see in the callers that there is no error to handle. Also the return value of i2c and spi remove callbacks is ignored anyway. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Link: https://lore.kernel.org/r/20211012153945.2651412-7-u.kleine-koenig@pengutronix.de Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
97 lines
2.1 KiB
C
97 lines
2.1 KiB
C
// 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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tsc200x_remove(&spi->dev);
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return 0;
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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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