forked from mirrors/linux
d95f0c4e5b
The chip needs to be powered up before calling tsc200x_stop_scan() which communicates with it; move the call to enable the regulator earlier in tsc200x_probe(). At the same time switch to using devm_regulator_get_enable() to simplify error handling. This also makes sure that regulator is not shut off too early when unbinding the driver. Link: https://lore.kernel.org/r/20240711172719.1248373-1-dmitry.torokhov@gmail.com Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
73 lines
1.6 KiB
C
73 lines
1.6 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* TSC2004 touchscreen driver
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*
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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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#include <linux/module.h>
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#include <linux/input.h>
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#include <linux/of.h>
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#include <linux/i2c.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 tsc2004_input_id = {
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.bustype = BUS_I2C,
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.product = 2004,
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};
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static int tsc2004_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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s32 data;
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struct i2c_client *i2c = to_i2c_client(dev);
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data = i2c_smbus_write_byte(i2c, tx);
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if (data < 0) {
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dev_err(dev, "%s: failed, command: %x i2c error: %d\n",
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__func__, cmd, data);
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return data;
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}
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return 0;
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}
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static int tsc2004_probe(struct i2c_client *i2c)
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{
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return tsc200x_probe(&i2c->dev, i2c->irq, &tsc2004_input_id,
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devm_regmap_init_i2c(i2c, &tsc200x_regmap_config),
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tsc2004_cmd);
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}
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static const struct i2c_device_id tsc2004_idtable[] = {
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{ "tsc2004" },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, tsc2004_idtable);
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#ifdef CONFIG_OF
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static const struct of_device_id tsc2004_of_match[] = {
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{ .compatible = "ti,tsc2004" },
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{ /* sentinel */ }
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};
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MODULE_DEVICE_TABLE(of, tsc2004_of_match);
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#endif
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static struct i2c_driver tsc2004_driver = {
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.driver = {
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.name = "tsc2004",
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.dev_groups = tsc200x_groups,
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.of_match_table = of_match_ptr(tsc2004_of_match),
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.pm = pm_sleep_ptr(&tsc200x_pm_ops),
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},
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.id_table = tsc2004_idtable,
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.probe = tsc2004_probe,
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};
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module_i2c_driver(tsc2004_driver);
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MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
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MODULE_DESCRIPTION("TSC2004 Touchscreen Driver");
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MODULE_LICENSE("GPL");
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