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// SPDX-License-Identifier: GPL-2.0+
/*
* AD5672R, AD5676, AD5676R, AD5681R, AD5682R, AD5683, AD5683R,
* AD5684, AD5684R, AD5685R, AD5686, AD5686R
* Digital to analog converters driver
*
* Copyright 2018 Analog Devices Inc.
*/
#include "ad5686.h"
#include <linux/module.h>
#include <linux/spi/spi.h>
static int ad5686_spi_write(struct ad5686_state *st,
u8 cmd, u8 addr, u16 val)
{
struct spi_device *spi = to_spi_device(st->dev);
u8 tx_len, *buf;
switch (st->chip_info->regmap_type) {
case AD5683_REGMAP:
st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
AD5683_DATA(val));
buf = &st->data[0].d8[1];
tx_len = 3;
break;
case AD5686_REGMAP:
st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
AD5686_ADDR(addr) |
val);
buf = &st->data[0].d8[1];
tx_len = 3;
break;
default:
return -EINVAL;
}
return spi_write(spi, buf, tx_len);
}
static int ad5686_spi_read(struct ad5686_state *st, u8 addr)
{
struct spi_transfer t[] = {
{
.tx_buf = &st->data[0].d8[1],
.len = 3,
.cs_change = 1,
}, {
.tx_buf = &st->data[1].d8[1],
.rx_buf = &st->data[2].d8[1],
.len = 3,
},
};
struct spi_device *spi = to_spi_device(st->dev);
u8 cmd = 0;
int ret;
if (st->chip_info->regmap_type == AD5686_REGMAP)
cmd = AD5686_CMD_READBACK_ENABLE;
else if (st->chip_info->regmap_type == AD5683_REGMAP)
cmd = AD5686_CMD_READBACK_ENABLE_V2;
st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
AD5686_ADDR(addr));
st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP));
ret = spi_sync_transfer(spi, t, ARRAY_SIZE(t));
if (ret < 0)
return ret;
return be32_to_cpu(st->data[2].d32);
}
static int ad5686_spi_probe(struct spi_device *spi)
{
const struct spi_device_id *id = spi_get_device_id(spi);
return ad5686_probe(&spi->dev, id->driver_data, id->name,
ad5686_spi_write, ad5686_spi_read);
}
static int ad5686_spi_remove(struct spi_device *spi)
{
return ad5686_remove(&spi->dev);
}
static const struct spi_device_id ad5686_spi_id[] = {
{"ad5672r", ID_AD5672R},
{"ad5676", ID_AD5676},
{"ad5676r", ID_AD5676R},
{"ad5681r", ID_AD5681R},
{"ad5682r", ID_AD5682R},
{"ad5683", ID_AD5683},
{"ad5683r", ID_AD5683R},
{"ad5684", ID_AD5684},
{"ad5684r", ID_AD5684R},
{"ad5685", ID_AD5685R}, /* Does not exist */
{"ad5685r", ID_AD5685R},
{"ad5686", ID_AD5686},
{"ad5686r", ID_AD5686R},
{}
};
MODULE_DEVICE_TABLE(spi, ad5686_spi_id);
static struct spi_driver ad5686_spi_driver = {
.driver = {
.name = "ad5686",
},
.probe = ad5686_spi_probe,
.remove = ad5686_spi_remove,
.id_table = ad5686_spi_id,
};
module_spi_driver(ad5686_spi_driver);
MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
MODULE_LICENSE("GPL v2");
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