^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-or-later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * AD714X CapTouch Programmable Controller driver (I2C bus)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright 2009-2011 Analog Devices Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/input.h> /* BUS_I2C */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/pm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include "ad714x.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) static int __maybe_unused ad714x_i2c_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) return ad714x_disable(i2c_get_clientdata(to_i2c_client(dev)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static int __maybe_unused ad714x_i2c_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) return ad714x_enable(i2c_get_clientdata(to_i2c_client(dev)));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) static SIMPLE_DEV_PM_OPS(ad714x_i2c_pm, ad714x_i2c_suspend, ad714x_i2c_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static int ad714x_i2c_write(struct ad714x_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) unsigned short reg, unsigned short data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct i2c_client *client = to_i2c_client(chip->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) chip->xfer_buf[0] = cpu_to_be16(reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) chip->xfer_buf[1] = cpu_to_be16(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) error = i2c_master_send(client, (u8 *)chip->xfer_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 2 * sizeof(*chip->xfer_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) if (unlikely(error < 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) dev_err(&client->dev, "I2C write error: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) static int ad714x_i2c_read(struct ad714x_chip *chip,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) unsigned short reg, unsigned short *data, size_t len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) struct i2c_client *client = to_i2c_client(chip->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) chip->xfer_buf[0] = cpu_to_be16(reg);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) error = i2c_master_send(client, (u8 *)chip->xfer_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) sizeof(*chip->xfer_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) if (error >= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) error = i2c_master_recv(client, (u8 *)chip->xfer_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) len * sizeof(*chip->xfer_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) if (unlikely(error < 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) dev_err(&client->dev, "I2C read error: %d\n", error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) for (i = 0; i < len; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) data[i] = be16_to_cpu(chip->xfer_buf[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) static int ad714x_i2c_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) struct ad714x_chip *chip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) chip = ad714x_probe(&client->dev, BUS_I2C, client->irq,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) ad714x_i2c_read, ad714x_i2c_write);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (IS_ERR(chip))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return PTR_ERR(chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) i2c_set_clientdata(client, chip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) static const struct i2c_device_id ad714x_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) { "ad7142_captouch", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) { "ad7143_captouch", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) { "ad7147_captouch", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) { "ad7147a_captouch", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) { "ad7148_captouch", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) MODULE_DEVICE_TABLE(i2c, ad714x_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) static struct i2c_driver ad714x_i2c_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) .name = "ad714x_captouch",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) .pm = &ad714x_i2c_pm,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) .probe = ad714x_i2c_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) .id_table = ad714x_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) module_i2c_driver(ad714x_i2c_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) MODULE_DESCRIPTION("Analog Devices AD714X Capacitance Touch Sensor I2C Bus Driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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