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// SPDX-License-Identifier: GPL-2.0
/*
* AD5446 SPI I2C driver
*
* Copyright 2025 Analog Devices Inc.
*/
#include <linux/err.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/i2c.h>
#include <asm/byteorder.h>
#include "ad5446.h"
static int ad5622_write(struct ad5446_state *st, unsigned int val)
{
struct i2c_client *client = to_i2c_client(st->dev);
int ret;
st->d16 = cpu_to_be16(val);
ret = i2c_master_send_dmasafe(client, (char *)&st->d16, sizeof(st->d16));
if (ret < 0)
return ret;
if (ret != sizeof(st->d16))
return -EIO;
return 0;
}
static int ad5446_i2c_probe(struct i2c_client *i2c)
{
const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
const struct ad5446_chip_info *chip_info;
chip_info = i2c_get_match_data(i2c);
if (!chip_info)
return -ENODEV;
return ad5446_probe(&i2c->dev, id->name, chip_info);
}
/*
* ad5446_supported_i2c_device_ids:
* The AD5620/40/60 parts are available in different fixed internal reference
* voltage options. The actual part numbers may look differently
* (and a bit cryptic), however this style is used to make clear which
* parts are supported here.
*/
static const struct ad5446_chip_info ad5602_chip_info = {
.channel = AD5446_CHANNEL_POWERDOWN(8, 16, 4),
.write = ad5622_write,
};
static const struct ad5446_chip_info ad5612_chip_info = {
.channel = AD5446_CHANNEL_POWERDOWN(10, 16, 2),
.write = ad5622_write,
};
static const struct ad5446_chip_info ad5622_chip_info = {
.channel = AD5446_CHANNEL_POWERDOWN(12, 16, 0),
.write = ad5622_write,
};
static const struct i2c_device_id ad5446_i2c_ids[] = {
{"ad5301", (kernel_ulong_t)&ad5602_chip_info},
{"ad5311", (kernel_ulong_t)&ad5612_chip_info},
{"ad5321", (kernel_ulong_t)&ad5622_chip_info},
{"ad5602", (kernel_ulong_t)&ad5602_chip_info},
{"ad5612", (kernel_ulong_t)&ad5612_chip_info},
{"ad5622", (kernel_ulong_t)&ad5622_chip_info},
{ }
};
MODULE_DEVICE_TABLE(i2c, ad5446_i2c_ids);
static const struct of_device_id ad5446_i2c_of_ids[] = {
{ .compatible = "adi,ad5301", .data = &ad5602_chip_info },
{ .compatible = "adi,ad5311", .data = &ad5612_chip_info },
{ .compatible = "adi,ad5321", .data = &ad5622_chip_info },
{ .compatible = "adi,ad5602", .data = &ad5602_chip_info },
{ .compatible = "adi,ad5612", .data = &ad5612_chip_info },
{ .compatible = "adi,ad5622", .data = &ad5622_chip_info },
{ }
};
MODULE_DEVICE_TABLE(OF, ad5446_i2c_of_ids);
static struct i2c_driver ad5446_i2c_driver = {
.driver = {
.name = "ad5446",
.of_match_table = ad5446_i2c_of_ids,
},
.probe = ad5446_i2c_probe,
.id_table = ad5446_i2c_ids,
};
module_i2c_driver(ad5446_i2c_driver);
MODULE_AUTHOR("Nuno Sá <nuno.sa@analog.com>");
MODULE_DESCRIPTION("Analog Devices AD5622 and similar I2C DACs");
MODULE_LICENSE("GPL");
MODULE_IMPORT_NS("IIO_AD5446");
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