mirror of
https://github.com/torvalds/linux.git
synced 2025-10-31 16:48:26 +02:00
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
|
|
/*
|
|
* TSC2004 touchscreen driver
|
|
*
|
|
* Copyright (C) 2015 QWERTY Embedded Design
|
|
* Copyright (C) 2015 EMAC Inc.
|
|
*/
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/input.h>
|
|
#include <linux/of.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/regmap.h>
|
|
#include "tsc200x-core.h"
|
|
|
|
static const struct input_id tsc2004_input_id = {
|
|
.bustype = BUS_I2C,
|
|
.product = 2004,
|
|
};
|
|
|
|
static int tsc2004_cmd(struct device *dev, u8 cmd)
|
|
{
|
|
u8 tx = TSC200X_CMD | TSC200X_CMD_12BIT | cmd;
|
|
s32 data;
|
|
struct i2c_client *i2c = to_i2c_client(dev);
|
|
|
|
data = i2c_smbus_write_byte(i2c, tx);
|
|
if (data < 0) {
|
|
dev_err(dev, "%s: failed, command: %x i2c error: %d\n",
|
|
__func__, cmd, data);
|
|
return data;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tsc2004_probe(struct i2c_client *i2c)
|
|
|
|
{
|
|
return tsc200x_probe(&i2c->dev, i2c->irq, &tsc2004_input_id,
|
|
devm_regmap_init_i2c(i2c, &tsc200x_regmap_config),
|
|
tsc2004_cmd);
|
|
}
|
|
|
|
static const struct i2c_device_id tsc2004_idtable[] = {
|
|
{ "tsc2004" },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, tsc2004_idtable);
|
|
|
|
#ifdef CONFIG_OF
|
|
static const struct of_device_id tsc2004_of_match[] = {
|
|
{ .compatible = "ti,tsc2004" },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, tsc2004_of_match);
|
|
#endif
|
|
|
|
static struct i2c_driver tsc2004_driver = {
|
|
.driver = {
|
|
.name = "tsc2004",
|
|
.dev_groups = tsc200x_groups,
|
|
.of_match_table = of_match_ptr(tsc2004_of_match),
|
|
.pm = pm_sleep_ptr(&tsc200x_pm_ops),
|
|
},
|
|
.id_table = tsc2004_idtable,
|
|
.probe = tsc2004_probe,
|
|
};
|
|
module_i2c_driver(tsc2004_driver);
|
|
|
|
MODULE_AUTHOR("Michael Welling <mwelling@ieee.org>");
|
|
MODULE_DESCRIPTION("TSC2004 Touchscreen Driver");
|
|
MODULE_LICENSE("GPL");
|