tsc2004 linux 驱动代码

// SPDX-License-Identifier: GPL-2.0-or-later
/*

• TSC2004 touchscreen driver
• Copyright © 2015 QWERTY Embedded Design
• Copyright © 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_p