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| // SPDX-License-Identifier: GPL-2.0
| /*
| * AD5671R, AD5675R, AD5691R, AD5692R, AD5693, AD5693R,
| * AD5694, AD5694R, AD5695R, AD5696, AD5696R
| * Digital to analog converters driver
| *
| * Copyright 2018 Analog Devices Inc.
| */
|
| #include "ad5686.h"
|
| #include <linux/module.h>
| #include <linux/i2c.h>
|
| static int ad5686_i2c_read(struct ad5686_state *st, u8 addr)
| {
| struct i2c_client *i2c = to_i2c_client(st->dev);
| struct i2c_msg msg[2] = {
| {
| .addr = i2c->addr,
| .flags = i2c->flags,
| .len = 3,
| .buf = &st->data[0].d8[1],
| },
| {
| .addr = i2c->addr,
| .flags = i2c->flags | I2C_M_RD,
| .len = 2,
| .buf = (char *)&st->data[0].d16,
| },
| };
| int ret;
|
| st->data[0].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP) |
| AD5686_ADDR(addr) |
| 0x00);
|
| ret = i2c_transfer(i2c->adapter, msg, 2);
| if (ret < 0)
| return ret;
|
| return be16_to_cpu(st->data[0].d16);
| }
|
| static int ad5686_i2c_write(struct ad5686_state *st,
| u8 cmd, u8 addr, u16 val)
| {
| struct i2c_client *i2c = to_i2c_client(st->dev);
| int ret;
|
| st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) | AD5686_ADDR(addr)
| | val);
|
| ret = i2c_master_send(i2c, &st->data[0].d8[1], 3);
| if (ret < 0)
| return ret;
|
| return (ret != 3) ? -EIO : 0;
| }
|
| static int ad5686_i2c_probe(struct i2c_client *i2c,
| const struct i2c_device_id *id)
| {
| return ad5686_probe(&i2c->dev, id->driver_data, id->name,
| ad5686_i2c_write, ad5686_i2c_read);
| }
|
| static int ad5686_i2c_remove(struct i2c_client *i2c)
| {
| return ad5686_remove(&i2c->dev);
| }
|
| static const struct i2c_device_id ad5686_i2c_id[] = {
| {"ad5311r", ID_AD5311R},
| {"ad5671r", ID_AD5671R},
| {"ad5675r", ID_AD5675R},
| {"ad5691r", ID_AD5691R},
| {"ad5692r", ID_AD5692R},
| {"ad5693", ID_AD5693},
| {"ad5693r", ID_AD5693R},
| {"ad5694", ID_AD5694},
| {"ad5694r", ID_AD5694R},
| {"ad5695r", ID_AD5695R},
| {"ad5696", ID_AD5696},
| {"ad5696r", ID_AD5696R},
| {}
| };
| MODULE_DEVICE_TABLE(i2c, ad5686_i2c_id);
|
| static struct i2c_driver ad5686_i2c_driver = {
| .driver = {
| .name = "ad5696",
| },
| .probe = ad5686_i2c_probe,
| .remove = ad5686_i2c_remove,
| .id_table = ad5686_i2c_id,
| };
|
| module_i2c_driver(ad5686_i2c_driver);
|
| MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
| MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
| MODULE_LICENSE("GPL v2");
|
|
