1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * AD5672R, AD5674R, AD5676, AD5676R, AD5679R,
4*4882a593Smuzhiyun * AD5681R, AD5682R, AD5683, AD5683R, AD5684,
5*4882a593Smuzhiyun * AD5684R, AD5685R, AD5686, AD5686R
6*4882a593Smuzhiyun * Digital to analog converters driver
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Copyright 2018 Analog Devices Inc.
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include "ad5686.h"
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include <linux/module.h>
14*4882a593Smuzhiyun #include <linux/spi/spi.h>
15*4882a593Smuzhiyun
ad5686_spi_write(struct ad5686_state * st,u8 cmd,u8 addr,u16 val)16*4882a593Smuzhiyun static int ad5686_spi_write(struct ad5686_state *st,
17*4882a593Smuzhiyun u8 cmd, u8 addr, u16 val)
18*4882a593Smuzhiyun {
19*4882a593Smuzhiyun struct spi_device *spi = to_spi_device(st->dev);
20*4882a593Smuzhiyun u8 tx_len, *buf;
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun switch (st->chip_info->regmap_type) {
23*4882a593Smuzhiyun case AD5310_REGMAP:
24*4882a593Smuzhiyun st->data[0].d16 = cpu_to_be16(AD5310_CMD(cmd) |
25*4882a593Smuzhiyun val);
26*4882a593Smuzhiyun buf = &st->data[0].d8[0];
27*4882a593Smuzhiyun tx_len = 2;
28*4882a593Smuzhiyun break;
29*4882a593Smuzhiyun case AD5683_REGMAP:
30*4882a593Smuzhiyun st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
31*4882a593Smuzhiyun AD5683_DATA(val));
32*4882a593Smuzhiyun buf = &st->data[0].d8[1];
33*4882a593Smuzhiyun tx_len = 3;
34*4882a593Smuzhiyun break;
35*4882a593Smuzhiyun case AD5686_REGMAP:
36*4882a593Smuzhiyun st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
37*4882a593Smuzhiyun AD5686_ADDR(addr) |
38*4882a593Smuzhiyun val);
39*4882a593Smuzhiyun buf = &st->data[0].d8[1];
40*4882a593Smuzhiyun tx_len = 3;
41*4882a593Smuzhiyun break;
42*4882a593Smuzhiyun default:
43*4882a593Smuzhiyun return -EINVAL;
44*4882a593Smuzhiyun }
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun return spi_write(spi, buf, tx_len);
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
ad5686_spi_read(struct ad5686_state * st,u8 addr)49*4882a593Smuzhiyun static int ad5686_spi_read(struct ad5686_state *st, u8 addr)
50*4882a593Smuzhiyun {
51*4882a593Smuzhiyun struct spi_transfer t[] = {
52*4882a593Smuzhiyun {
53*4882a593Smuzhiyun .tx_buf = &st->data[0].d8[1],
54*4882a593Smuzhiyun .len = 3,
55*4882a593Smuzhiyun .cs_change = 1,
56*4882a593Smuzhiyun }, {
57*4882a593Smuzhiyun .tx_buf = &st->data[1].d8[1],
58*4882a593Smuzhiyun .rx_buf = &st->data[2].d8[1],
59*4882a593Smuzhiyun .len = 3,
60*4882a593Smuzhiyun },
61*4882a593Smuzhiyun };
62*4882a593Smuzhiyun struct spi_device *spi = to_spi_device(st->dev);
63*4882a593Smuzhiyun u8 cmd = 0;
64*4882a593Smuzhiyun int ret;
65*4882a593Smuzhiyun
66*4882a593Smuzhiyun switch (st->chip_info->regmap_type) {
67*4882a593Smuzhiyun case AD5310_REGMAP:
68*4882a593Smuzhiyun return -ENOTSUPP;
69*4882a593Smuzhiyun case AD5683_REGMAP:
70*4882a593Smuzhiyun cmd = AD5686_CMD_READBACK_ENABLE_V2;
71*4882a593Smuzhiyun break;
72*4882a593Smuzhiyun case AD5686_REGMAP:
73*4882a593Smuzhiyun cmd = AD5686_CMD_READBACK_ENABLE;
74*4882a593Smuzhiyun break;
75*4882a593Smuzhiyun default:
76*4882a593Smuzhiyun return -EINVAL;
77*4882a593Smuzhiyun }
78*4882a593Smuzhiyun
79*4882a593Smuzhiyun st->data[0].d32 = cpu_to_be32(AD5686_CMD(cmd) |
80*4882a593Smuzhiyun AD5686_ADDR(addr));
81*4882a593Smuzhiyun st->data[1].d32 = cpu_to_be32(AD5686_CMD(AD5686_CMD_NOOP));
82*4882a593Smuzhiyun
83*4882a593Smuzhiyun ret = spi_sync_transfer(spi, t, ARRAY_SIZE(t));
84*4882a593Smuzhiyun if (ret < 0)
85*4882a593Smuzhiyun return ret;
86*4882a593Smuzhiyun
87*4882a593Smuzhiyun return be32_to_cpu(st->data[2].d32);
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun
ad5686_spi_probe(struct spi_device * spi)90*4882a593Smuzhiyun static int ad5686_spi_probe(struct spi_device *spi)
91*4882a593Smuzhiyun {
92*4882a593Smuzhiyun const struct spi_device_id *id = spi_get_device_id(spi);
93*4882a593Smuzhiyun
94*4882a593Smuzhiyun return ad5686_probe(&spi->dev, id->driver_data, id->name,
95*4882a593Smuzhiyun ad5686_spi_write, ad5686_spi_read);
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun
ad5686_spi_remove(struct spi_device * spi)98*4882a593Smuzhiyun static int ad5686_spi_remove(struct spi_device *spi)
99*4882a593Smuzhiyun {
100*4882a593Smuzhiyun return ad5686_remove(&spi->dev);
101*4882a593Smuzhiyun }
102*4882a593Smuzhiyun
103*4882a593Smuzhiyun static const struct spi_device_id ad5686_spi_id[] = {
104*4882a593Smuzhiyun {"ad5310r", ID_AD5310R},
105*4882a593Smuzhiyun {"ad5672r", ID_AD5672R},
106*4882a593Smuzhiyun {"ad5674r", ID_AD5674R},
107*4882a593Smuzhiyun {"ad5676", ID_AD5676},
108*4882a593Smuzhiyun {"ad5676r", ID_AD5676R},
109*4882a593Smuzhiyun {"ad5679r", ID_AD5679R},
110*4882a593Smuzhiyun {"ad5681r", ID_AD5681R},
111*4882a593Smuzhiyun {"ad5682r", ID_AD5682R},
112*4882a593Smuzhiyun {"ad5683", ID_AD5683},
113*4882a593Smuzhiyun {"ad5683r", ID_AD5683R},
114*4882a593Smuzhiyun {"ad5684", ID_AD5684},
115*4882a593Smuzhiyun {"ad5684r", ID_AD5684R},
116*4882a593Smuzhiyun {"ad5685", ID_AD5685R}, /* Does not exist */
117*4882a593Smuzhiyun {"ad5685r", ID_AD5685R},
118*4882a593Smuzhiyun {"ad5686", ID_AD5686},
119*4882a593Smuzhiyun {"ad5686r", ID_AD5686R},
120*4882a593Smuzhiyun {}
121*4882a593Smuzhiyun };
122*4882a593Smuzhiyun MODULE_DEVICE_TABLE(spi, ad5686_spi_id);
123*4882a593Smuzhiyun
124*4882a593Smuzhiyun static struct spi_driver ad5686_spi_driver = {
125*4882a593Smuzhiyun .driver = {
126*4882a593Smuzhiyun .name = "ad5686",
127*4882a593Smuzhiyun },
128*4882a593Smuzhiyun .probe = ad5686_spi_probe,
129*4882a593Smuzhiyun .remove = ad5686_spi_remove,
130*4882a593Smuzhiyun .id_table = ad5686_spi_id,
131*4882a593Smuzhiyun };
132*4882a593Smuzhiyun
133*4882a593Smuzhiyun module_spi_driver(ad5686_spi_driver);
134*4882a593Smuzhiyun
135*4882a593Smuzhiyun MODULE_AUTHOR("Stefan Popa <stefan.popa@analog.com>");
136*4882a593Smuzhiyun MODULE_DESCRIPTION("Analog Devices AD5686 and similar multi-channel DACs");
137*4882a593Smuzhiyun MODULE_LICENSE("GPL v2");
138