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// SPDX-License-Identifier: GPL-2.0
/*
* I2C driver for AD5696 and similar Digital to Analog Converters
*
* Copyright 2018 Analog Devices Inc.
*/
#include <linux/bitfield.h>
#include <linux/errno.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <asm/byteorder.h>
#include "ad5686.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(FIELD_PREP(AD5686_CMD_MSK, AD5686_CMD_NOOP) |
FIELD_PREP(AD5686_ADDR_MSK, addr));
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(FIELD_PREP(AD5686_CMD_MSK, cmd) |
FIELD_PREP(AD5686_ADDR_MSK, addr) |
FIELD_PREP(AD5686_DATA_MSK, val));
ret = i2c_master_send(i2c, &st->data[0].d8[1], 3);
if (ret < 0)
return ret;
return (ret != 3) ? -EIO : 0;
}
static const struct ad5686_bus_ops ad5686_i2c_ops = {
.write = ad5686_i2c_write,
.read = ad5686_i2c_read,
};
static int ad5686_i2c_probe(struct i2c_client *i2c)
{
const struct ad5686_chip_info *info;
info = i2c_get_match_data(i2c);
if (!info)
return -ENODATA;
return ad5686_probe(&i2c->dev, info, i2c->name, &ad5686_i2c_ops, NULL);
}
static const struct i2c_device_id ad5686_i2c_id[] = {
{ .name = "ad5311r", .driver_data = (kernel_ulong_t)&ad5311r_chip_info },
{ .name = "ad5316r", .driver_data = (kernel_ulong_t)&ad5317r_chip_info },
{ .name = "ad5337r", .driver_data = (kernel_ulong_t)&ad5337r_chip_info },
{ .name = "ad5338r", .driver_data = (kernel_ulong_t)&ad5338r_chip_info },
{ .name = "ad5671r", .driver_data = (kernel_ulong_t)&ad5672r_chip_info },
{ .name = "ad5673r", .driver_data = (kernel_ulong_t)&ad5674r_chip_info },
{ .name = "ad5675", .driver_data = (kernel_ulong_t)&ad5676_chip_info },
{ .name = "ad5675r", .driver_data = (kernel_ulong_t)&ad5676r_chip_info },
{ .name = "ad5677r", .driver_data = (kernel_ulong_t)&ad5679r_chip_info },
{ .name = "ad5691r", .driver_data = (kernel_ulong_t)&ad5681r_chip_info },
{ .name = "ad5692r", .driver_data = (kernel_ulong_t)&ad5682r_chip_info },
{ .name = "ad5693", .driver_data = (kernel_ulong_t)&ad5683_chip_info },
{ .name = "ad5693r", .driver_data = (kernel_ulong_t)&ad5683r_chip_info },
{ .name = "ad5694", .driver_data = (kernel_ulong_t)&ad5684_chip_info },
{ .name = "ad5694r", .driver_data = (kernel_ulong_t)&ad5684r_chip_info },
{ .name = "ad5695r", .driver_data = (kernel_ulong_t)&ad5685r_chip_info },
{ .name = "ad5696", .driver_data = (kernel_ulong_t)&ad5686_chip_info },
{ .name = "ad5696r", .driver_data = (kernel_ulong_t)&ad5686r_chip_info },
{ .name = "ad5697r", .driver_data = (kernel_ulong_t)&ad5687r_chip_info },
{ }
};
MODULE_DEVICE_TABLE(i2c, ad5686_i2c_id);
static const struct of_device_id ad5686_of_match[] = {
{ .compatible = "adi,ad5311r", .data = &ad5311r_chip_info },
{ .compatible = "adi,ad5316r", .data = &ad5317r_chip_info },
{ .compatible = "adi,ad5337r", .data = &ad5337r_chip_info },
{ .compatible = "adi,ad5338r", .data = &ad5338r_chip_info },
{ .compatible = "adi,ad5671r", .data = &ad5672r_chip_info },
{ .compatible = "adi,ad5673r", .data = &ad5674r_chip_info },
{ .compatible = "adi,ad5675", .data = &ad5676_chip_info },
{ .compatible = "adi,ad5675r", .data = &ad5676r_chip_info },
{ .compatible = "adi,ad5677r", .data = &ad5679r_chip_info },
{ .compatible = "adi,ad5691r", .data = &ad5681r_chip_info },
{ .compatible = "adi,ad5692r", .data = &ad5682r_chip_info },
{ .compatible = "adi,ad5693", .data = &ad5683_chip_info },
{ .compatible = "adi,ad5693r", .data = &ad5683r_chip_info },
{ .compatible = "adi,ad5694", .data = &ad5684_chip_info },
{ .compatible = "adi,ad5694r", .data = &ad5684r_chip_info },
{ .compatible = "adi,ad5695r", .data = &ad5685r_chip_info },
{ .compatible = "adi,ad5696", .data = &ad5686_chip_info },
{ .compatible = "adi,ad5696r", .data = &ad5686r_chip_info },
{ .compatible = "adi,ad5697r", .data = &ad5687r_chip_info },
{ }
};
MODULE_DEVICE_TABLE(of, ad5686_of_match);
static struct i2c_driver ad5686_i2c_driver = {
.driver = {
.name = "ad5696",
.of_match_table = ad5686_of_match,
},
.probe = ad5686_i2c_probe,
.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");
MODULE_IMPORT_NS("IIO_AD5686");
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