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c0a150eee3
The I2C and SPI PM callbacks were identical (though wrapped in some bouncing out to the bus specific container of the struct device and then back again to get the drvdata). As such rather than just moving these to SIMPLE_DEV_PM_OPS() and pm_sleep_ptr() take the opportunity to unify the struct dev_pm_ops and use the new EXPORT_SIMPLE_DEV_PM_OPS() macro so that we can drop the unused suspend and resume callbacks as well as the structure if !CONFIG_PM_SLEEP without needing to mark the callbacks __maybe_unused. Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Cc: Michael Hennerich <michael.hennerich@analog.com> Link: https://lore.kernel.org/r/20230114171620.42891-8-jic23@kernel.org Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
97 lines
2.2 KiB
C
97 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* AD714X CapTouch Programmable Controller driver (I2C bus)
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*
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* Copyright 2009-2011 Analog Devices Inc.
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*/
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#include <linux/input.h> /* BUS_I2C */
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#include <linux/i2c.h>
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/pm.h>
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#include "ad714x.h"
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static int ad714x_i2c_write(struct ad714x_chip *chip,
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unsigned short reg, unsigned short data)
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{
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struct i2c_client *client = to_i2c_client(chip->dev);
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int error;
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chip->xfer_buf[0] = cpu_to_be16(reg);
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chip->xfer_buf[1] = cpu_to_be16(data);
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error = i2c_master_send(client, (u8 *)chip->xfer_buf,
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2 * sizeof(*chip->xfer_buf));
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if (unlikely(error < 0)) {
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dev_err(&client->dev, "I2C write error: %d\n", 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 ad714x_i2c_read(struct ad714x_chip *chip,
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unsigned short reg, unsigned short *data, size_t len)
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{
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struct i2c_client *client = to_i2c_client(chip->dev);
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int i;
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int error;
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chip->xfer_buf[0] = cpu_to_be16(reg);
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error = i2c_master_send(client, (u8 *)chip->xfer_buf,
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sizeof(*chip->xfer_buf));
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if (error >= 0)
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error = i2c_master_recv(client, (u8 *)chip->xfer_buf,
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len * sizeof(*chip->xfer_buf));
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if (unlikely(error < 0)) {
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dev_err(&client->dev, "I2C read error: %d\n", error);
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return error;
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}
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for (i = 0; i < len; i++)
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data[i] = be16_to_cpu(chip->xfer_buf[i]);
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return 0;
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}
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static int ad714x_i2c_probe(struct i2c_client *client)
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{
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struct ad714x_chip *chip;
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chip = ad714x_probe(&client->dev, BUS_I2C, client->irq,
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ad714x_i2c_read, ad714x_i2c_write);
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if (IS_ERR(chip))
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return PTR_ERR(chip);
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i2c_set_clientdata(client, chip);
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return 0;
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}
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static const struct i2c_device_id ad714x_id[] = {
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{ "ad7142_captouch", 0 },
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{ "ad7143_captouch", 0 },
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{ "ad7147_captouch", 0 },
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{ "ad7147a_captouch", 0 },
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{ "ad7148_captouch", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, ad714x_id);
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static struct i2c_driver ad714x_i2c_driver = {
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.driver = {
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.name = "ad714x_captouch",
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.pm = pm_sleep_ptr(&ad714x_pm),
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},
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.probe_new = ad714x_i2c_probe,
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.id_table = ad714x_id,
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};
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module_i2c_driver(ad714x_i2c_driver);
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MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor I2C Bus Driver");
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MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
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MODULE_LICENSE("GPL");
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