1 // SPDX-License-Identifier: GPL-2.0+
3 * AD5672R, AD5676, AD5676R, AD5681R, AD5682R, AD5683, AD5683R,
4 * AD5684, AD5684R, AD5685R, AD5686, AD5686R
5 * Digital to analog converters driver
7 * Copyright 2018 Analog Devices Inc.
12 #include <linux/module.h>
13 #include <linux/spi/spi.h>
15 static int ad5686_spi_write(struct ad5686_state *st,
16 u8 cmd, u8 addr, u16 val)
18 struct spi_device *spi = to_spi_device(st->dev);
21 switch (st->chip_info->regmap_type) {
23 st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
25 buf = &st->data[0].d8[1];
29 st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
32 buf = &st->data[0].d8[1];
39 return spi_write(spi, buf, tx_len);
42 static int ad5686_spi_read(struct ad5686_state *st, u8 addr)
44 struct spi_transfer t[] = {
46 .tx_buf = &st->data[0].d8[1],
50 .tx_buf = &st->data[1].d8[1],
51 .rx_buf = &st->data[2].d8[1],
55 struct spi_device *spi = to_spi_device(st->dev);
59 if (st->chip_info->regmap_type == AD5686_REGMAP)
60 cmd = AD5686_CMD_READBACK_ENABLE;
61 else if (st->chip_info->regmap_type == AD5683_REGMAP)
62 cmd = AD5686_CMD_READBACK_ENABLE_V2;
64 st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
66 st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP));
68 ret = spi_sync_transfer(spi, t, ARRAY_SIZE(t));
72 return be32_to_cpu(st->data[2].d32);
75 static int ad5686_spi_probe(struct spi_device *spi)
77 const struct spi_device_id *id = spi_get_device_id(spi);
79 return ad5686_probe(&spi->dev, id->driver_data, id->name,
80 ad5686_spi_write, ad5686_spi_read);
83 static int ad5686_spi_remove(struct spi_device *spi)
85 return ad5686_remove(&spi->dev);
88 static const struct spi_device_id ad5686_spi_id[] = {
89 {"ad5672r", ID_AD5672R},
90 {"ad5676", ID_AD5676},
91 {"ad5676r", ID_AD5676R},
92 {"ad5681r", ID_AD5681R},
93 {"ad5682r", ID_AD5682R},
94 {"ad5683", ID_AD5683},
95 {"ad5683r", ID_AD5683R},
96 {"ad5684", ID_AD5684},
97 {"ad5684r", ID_AD5684R},
98 {"ad5685", ID_AD5685R}, /* Does not exist */
99 {"ad5685r", ID_AD5685R},
100 {"ad5686", ID_AD5686},
101 {"ad5686r", ID_AD5686R},
104 MODULE_DEVICE_TABLE(spi, ad5686_spi_id);
106 static struct spi_driver ad5686_spi_driver = {
110 .probe = ad5686_spi_probe,
111 .remove = ad5686_spi_remove,
112 .id_table = ad5686_spi_id,
115 module_spi_driver(ad5686_spi_driver);
117 MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
118 MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
119 MODULE_LICENSE("GPL v2");