tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * AD5446 SPI DAC driver
4 *
5 * Copyright 2025 Analog Devices Inc.
6 */
7#include <linux/err.h>
8#include <linux/module.h>
9#include <linux/mod_devicetable.h>
10#include <linux/spi/spi.h>
11#include <linux/unaligned.h>
12
13#include <asm/byteorder.h>
14
15#include "ad5446.h"
16
17static int ad5446_write(struct ad5446_state *st, unsigned int val)
18{
19 struct spi_device *spi = to_spi_device(st->dev);
20
21 st->d16 = cpu_to_be16(val);
22
23 return spi_write(spi, &st->d16, sizeof(st->d16));
24}
25
26static int ad5660_write(struct ad5446_state *st, unsigned int val)
27{
28 struct spi_device *spi = to_spi_device(st->dev);
29
30 put_unaligned_be24(val, st->d24);
31
32 return spi_write(spi, st->d24, sizeof(st->d24));
33}
34
35static int ad5446_spi_probe(struct spi_device *spi)
36{
37 const struct spi_device_id *id = spi_get_device_id(spi);
38 const struct ad5446_chip_info *chip_info;
39
40 chip_info = spi_get_device_match_data(spi);
41 if (!chip_info)
42 return -ENODEV;
43
44 return ad5446_probe(&spi->dev, id->name, chip_info);
45}
46
47/*
48 * ad5446_supported_spi_device_ids:
49 * The AD5620/40/60 parts are available in different fixed internal reference
50 * voltage options. The actual part numbers may look differently
51 * (and a bit cryptic), however this style is used to make clear which
52 * parts are supported here.
53 */
54
55static const struct ad5446_chip_info ad5300_chip_info = {
56 .channel = AD5446_CHANNEL_POWERDOWN(8, 16, 4),
57 .write = ad5446_write,
58};
59
60static const struct ad5446_chip_info ad5310_chip_info = {
61 .channel = AD5446_CHANNEL_POWERDOWN(10, 16, 2),
62 .write = ad5446_write,
63};
64
65static const struct ad5446_chip_info ad5320_chip_info = {
66 .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 0),
67 .write = ad5446_write,
68};
69
70static const struct ad5446_chip_info ad5444_chip_info = {
71 .channel = AD5446_CHANNEL(12, 16, 2),
72 .write = ad5446_write,
73};
74
75static const struct ad5446_chip_info ad5446_chip_info = {
76 .channel = AD5446_CHANNEL(14, 16, 0),
77 .write = ad5446_write,
78};
79
80static const struct ad5446_chip_info ad5450_chip_info = {
81 .channel = AD5446_CHANNEL(8, 16, 6),
82 .write = ad5446_write,
83};
84
85static const struct ad5446_chip_info ad5451_chip_info = {
86 .channel = AD5446_CHANNEL(10, 16, 4),
87 .write = ad5446_write,
88};
89
90static const struct ad5446_chip_info ad5541a_chip_info = {
91 .channel = AD5446_CHANNEL(16, 16, 0),
92 .write = ad5446_write,
93};
94
95static const struct ad5446_chip_info ad5512a_chip_info = {
96 .channel = AD5446_CHANNEL(12, 16, 4),
97 .write = ad5446_write,
98};
99
100static const struct ad5446_chip_info ad5553_chip_info = {
101 .channel = AD5446_CHANNEL(14, 16, 0),
102 .write = ad5446_write,
103};
104
105static const struct ad5446_chip_info ad5601_chip_info = {
106 .channel = AD5446_CHANNEL_POWERDOWN(8, 16, 6),
107 .write = ad5446_write,
108};
109
110static const struct ad5446_chip_info ad5611_chip_info = {
111 .channel = AD5446_CHANNEL_POWERDOWN(10, 16, 4),
112 .write = ad5446_write,
113};
114
115static const struct ad5446_chip_info ad5621_chip_info = {
116 .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2),
117 .write = ad5446_write,
118};
119
120static const struct ad5446_chip_info ad5641_chip_info = {
121 .channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0),
122 .write = ad5446_write,
123};
124
125static const struct ad5446_chip_info ad5620_2500_chip_info = {
126 .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2),
127 .int_vref_mv = 2500,
128 .write = ad5446_write,
129};
130
131static const struct ad5446_chip_info ad5620_1250_chip_info = {
132 .channel = AD5446_CHANNEL_POWERDOWN(12, 16, 2),
133 .int_vref_mv = 1250,
134 .write = ad5446_write,
135};
136
137static const struct ad5446_chip_info ad5640_2500_chip_info = {
138 .channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0),
139 .int_vref_mv = 2500,
140 .write = ad5446_write,
141};
142
143static const struct ad5446_chip_info ad5640_1250_chip_info = {
144 .channel = AD5446_CHANNEL_POWERDOWN(14, 16, 0),
145 .int_vref_mv = 1250,
146 .write = ad5446_write,
147};
148
149static const struct ad5446_chip_info ad5660_2500_chip_info = {
150 .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0),
151 .int_vref_mv = 2500,
152 .write = ad5660_write,
153};
154
155static const struct ad5446_chip_info ad5660_1250_chip_info = {
156 .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0),
157 .int_vref_mv = 1250,
158 .write = ad5660_write,
159};
160
161static const struct ad5446_chip_info ad5662_chip_info = {
162 .channel = AD5446_CHANNEL_POWERDOWN(16, 16, 0),
163 .write = ad5660_write,
164};
165
166static const struct spi_device_id ad5446_spi_ids[] = {
167 {"ad5300", (kernel_ulong_t)&ad5300_chip_info},
168 {"ad5310", (kernel_ulong_t)&ad5310_chip_info},
169 {"ad5320", (kernel_ulong_t)&ad5320_chip_info},
170 {"ad5444", (kernel_ulong_t)&ad5444_chip_info},
171 {"ad5446", (kernel_ulong_t)&ad5446_chip_info},
172 {"ad5450", (kernel_ulong_t)&ad5450_chip_info},
173 {"ad5451", (kernel_ulong_t)&ad5451_chip_info},
174 {"ad5452", (kernel_ulong_t)&ad5444_chip_info}, /* ad5452 is compatible to the ad5444 */
175 {"ad5453", (kernel_ulong_t)&ad5446_chip_info}, /* ad5453 is compatible to the ad5446 */
176 {"ad5512a", (kernel_ulong_t)&ad5512a_chip_info},
177 {"ad5541a", (kernel_ulong_t)&ad5541a_chip_info},
178 {"ad5542", (kernel_ulong_t)&ad5541a_chip_info}, /* ad5541a and ad5542 are compatible */
179 {"ad5542a", (kernel_ulong_t)&ad5541a_chip_info}, /* ad5541a and ad5542a are compatible */
180 {"ad5543", (kernel_ulong_t)&ad5541a_chip_info}, /* ad5541a and ad5543 are compatible */
181 {"ad5553", (kernel_ulong_t)&ad5553_chip_info},
182 {"ad5600", (kernel_ulong_t)&ad5541a_chip_info}, /* ad5541a and ad5600 are compatible */
183 {"ad5601", (kernel_ulong_t)&ad5601_chip_info},
184 {"ad5611", (kernel_ulong_t)&ad5611_chip_info},
185 {"ad5621", (kernel_ulong_t)&ad5621_chip_info},
186 {"ad5641", (kernel_ulong_t)&ad5641_chip_info},
187 {"ad5620-2500", (kernel_ulong_t)&ad5620_2500_chip_info}, /* AD5620/40/60: */
188 /* part numbers may look differently */
189 {"ad5620-1250", (kernel_ulong_t)&ad5620_1250_chip_info},
190 {"ad5640-2500", (kernel_ulong_t)&ad5640_2500_chip_info},
191 {"ad5640-1250", (kernel_ulong_t)&ad5640_1250_chip_info},
192 {"ad5660-2500", (kernel_ulong_t)&ad5660_2500_chip_info},
193 {"ad5660-1250", (kernel_ulong_t)&ad5660_1250_chip_info},
194 {"ad5662", (kernel_ulong_t)&ad5662_chip_info},
195 {"dac081s101", (kernel_ulong_t)&ad5300_chip_info}, /* compatible Texas Instruments chips */
196 {"dac101s101", (kernel_ulong_t)&ad5310_chip_info},
197 {"dac121s101", (kernel_ulong_t)&ad5320_chip_info},
198 {"dac7512", (kernel_ulong_t)&ad5320_chip_info},
199 { }
200};
201MODULE_DEVICE_TABLE(spi, ad5446_spi_ids);
202
203static const struct of_device_id ad5446_of_ids[] = {
204 { .compatible = "adi,ad5300", .data = &ad5300_chip_info },
205 { .compatible = "adi,ad5310", .data = &ad5310_chip_info },
206 { .compatible = "adi,ad5320", .data = &ad5320_chip_info },
207 { .compatible = "adi,ad5444", .data = &ad5444_chip_info },
208 { .compatible = "adi,ad5446", .data = &ad5446_chip_info },
209 { .compatible = "adi,ad5450", .data = &ad5450_chip_info },
210 { .compatible = "adi,ad5451", .data = &ad5451_chip_info },
211 { .compatible = "adi,ad5452", .data = &ad5444_chip_info },
212 { .compatible = "adi,ad5453", .data = &ad5446_chip_info },
213 { .compatible = "adi,ad5512a", .data = &ad5512a_chip_info },
214 { .compatible = "adi,ad5541a", .data = &ad5541a_chip_info },
215 { .compatible = "adi,ad5542", .data = &ad5541a_chip_info },
216 { .compatible = "adi,ad5542a", .data = &ad5541a_chip_info },
217 { .compatible = "adi,ad5543", .data = &ad5541a_chip_info },
218 { .compatible = "adi,ad5553", .data = &ad5553_chip_info },
219 { .compatible = "adi,ad5600", .data = &ad5541a_chip_info },
220 { .compatible = "adi,ad5601", .data = &ad5601_chip_info },
221 { .compatible = "adi,ad5611", .data = &ad5611_chip_info },
222 { .compatible = "adi,ad5621", .data = &ad5621_chip_info },
223 { .compatible = "adi,ad5641", .data = &ad5641_chip_info },
224 { .compatible = "adi,ad5620-2500", .data = &ad5620_2500_chip_info },
225 { .compatible = "adi,ad5620-1250", .data = &ad5620_1250_chip_info },
226 { .compatible = "adi,ad5640-2500", .data = &ad5640_2500_chip_info },
227 { .compatible = "adi,ad5640-1250", .data = &ad5640_1250_chip_info },
228 { .compatible = "adi,ad5660-2500", .data = &ad5660_2500_chip_info },
229 { .compatible = "adi,ad5660-1250", .data = &ad5660_1250_chip_info },
230 { .compatible = "adi,ad5662", .data = &ad5662_chip_info },
231 { .compatible = "ti,dac081s101", .data = &ad5300_chip_info },
232 { .compatible = "ti,dac101s101", .data = &ad5310_chip_info },
233 { .compatible = "ti,dac121s101", .data = &ad5320_chip_info },
234 { .compatible = "ti,dac7512", .data = &ad5320_chip_info },
235 { }
236};
237MODULE_DEVICE_TABLE(of, ad5446_of_ids);
238
239static struct spi_driver ad5446_spi_driver = {
240 .driver = {
241 .name = "ad5446",
242 .of_match_table = ad5446_of_ids,
243 },
244 .probe = ad5446_spi_probe,
245 .id_table = ad5446_spi_ids,
246};
247module_spi_driver(ad5446_spi_driver);
248
249MODULE_AUTHOR("Nuno Sá <nuno.sa@analog.com>");
250MODULE_DESCRIPTION("Analog Devices AD5446 and similar SPI DACs");
251MODULE_LICENSE("GPL");
252MODULE_IMPORT_NS("IIO_AD5446");