1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Driver for the Analog Devices digital potentiometers (SPI bus)
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2010-2011 Michael Hennerich, Analog Devices Inc.
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include <linux/spi/spi.h>
9*4882a593Smuzhiyun #include <linux/module.h>
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun #include "ad525x_dpot.h"
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun /* SPI bus functions */
write8(void * client,u8 val)14*4882a593Smuzhiyun static int write8(void *client, u8 val)
15*4882a593Smuzhiyun {
16*4882a593Smuzhiyun u8 data = val;
17*4882a593Smuzhiyun
18*4882a593Smuzhiyun return spi_write(client, &data, 1);
19*4882a593Smuzhiyun }
20*4882a593Smuzhiyun
write16(void * client,u8 reg,u8 val)21*4882a593Smuzhiyun static int write16(void *client, u8 reg, u8 val)
22*4882a593Smuzhiyun {
23*4882a593Smuzhiyun u8 data[2] = {reg, val};
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun return spi_write(client, data, 2);
26*4882a593Smuzhiyun }
27*4882a593Smuzhiyun
write24(void * client,u8 reg,u16 val)28*4882a593Smuzhiyun static int write24(void *client, u8 reg, u16 val)
29*4882a593Smuzhiyun {
30*4882a593Smuzhiyun u8 data[3] = {reg, val >> 8, val};
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun return spi_write(client, data, 3);
33*4882a593Smuzhiyun }
34*4882a593Smuzhiyun
read8(void * client)35*4882a593Smuzhiyun static int read8(void *client)
36*4882a593Smuzhiyun {
37*4882a593Smuzhiyun int ret;
38*4882a593Smuzhiyun u8 data;
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun ret = spi_read(client, &data, 1);
41*4882a593Smuzhiyun if (ret < 0)
42*4882a593Smuzhiyun return ret;
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun return data;
45*4882a593Smuzhiyun }
46*4882a593Smuzhiyun
read16(void * client,u8 reg)47*4882a593Smuzhiyun static int read16(void *client, u8 reg)
48*4882a593Smuzhiyun {
49*4882a593Smuzhiyun int ret;
50*4882a593Smuzhiyun u8 buf_rx[2];
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun write16(client, reg, 0);
53*4882a593Smuzhiyun ret = spi_read(client, buf_rx, 2);
54*4882a593Smuzhiyun if (ret < 0)
55*4882a593Smuzhiyun return ret;
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun return (buf_rx[0] << 8) | buf_rx[1];
58*4882a593Smuzhiyun }
59*4882a593Smuzhiyun
read24(void * client,u8 reg)60*4882a593Smuzhiyun static int read24(void *client, u8 reg)
61*4882a593Smuzhiyun {
62*4882a593Smuzhiyun int ret;
63*4882a593Smuzhiyun u8 buf_rx[3];
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun write24(client, reg, 0);
66*4882a593Smuzhiyun ret = spi_read(client, buf_rx, 3);
67*4882a593Smuzhiyun if (ret < 0)
68*4882a593Smuzhiyun return ret;
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun return (buf_rx[1] << 8) | buf_rx[2];
71*4882a593Smuzhiyun }
72*4882a593Smuzhiyun
73*4882a593Smuzhiyun static const struct ad_dpot_bus_ops bops = {
74*4882a593Smuzhiyun .read_d8 = read8,
75*4882a593Smuzhiyun .read_r8d8 = read16,
76*4882a593Smuzhiyun .read_r8d16 = read24,
77*4882a593Smuzhiyun .write_d8 = write8,
78*4882a593Smuzhiyun .write_r8d8 = write16,
79*4882a593Smuzhiyun .write_r8d16 = write24,
80*4882a593Smuzhiyun };
ad_dpot_spi_probe(struct spi_device * spi)81*4882a593Smuzhiyun static int ad_dpot_spi_probe(struct spi_device *spi)
82*4882a593Smuzhiyun {
83*4882a593Smuzhiyun struct ad_dpot_bus_data bdata = {
84*4882a593Smuzhiyun .client = spi,
85*4882a593Smuzhiyun .bops = &bops,
86*4882a593Smuzhiyun };
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun return ad_dpot_probe(&spi->dev, &bdata,
89*4882a593Smuzhiyun spi_get_device_id(spi)->driver_data,
90*4882a593Smuzhiyun spi_get_device_id(spi)->name);
91*4882a593Smuzhiyun }
92*4882a593Smuzhiyun
ad_dpot_spi_remove(struct spi_device * spi)93*4882a593Smuzhiyun static int ad_dpot_spi_remove(struct spi_device *spi)
94*4882a593Smuzhiyun {
95*4882a593Smuzhiyun return ad_dpot_remove(&spi->dev);
96*4882a593Smuzhiyun }
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun static const struct spi_device_id ad_dpot_spi_id[] = {
99*4882a593Smuzhiyun {"ad5160", AD5160_ID},
100*4882a593Smuzhiyun {"ad5161", AD5161_ID},
101*4882a593Smuzhiyun {"ad5162", AD5162_ID},
102*4882a593Smuzhiyun {"ad5165", AD5165_ID},
103*4882a593Smuzhiyun {"ad5200", AD5200_ID},
104*4882a593Smuzhiyun {"ad5201", AD5201_ID},
105*4882a593Smuzhiyun {"ad5203", AD5203_ID},
106*4882a593Smuzhiyun {"ad5204", AD5204_ID},
107*4882a593Smuzhiyun {"ad5206", AD5206_ID},
108*4882a593Smuzhiyun {"ad5207", AD5207_ID},
109*4882a593Smuzhiyun {"ad5231", AD5231_ID},
110*4882a593Smuzhiyun {"ad5232", AD5232_ID},
111*4882a593Smuzhiyun {"ad5233", AD5233_ID},
112*4882a593Smuzhiyun {"ad5235", AD5235_ID},
113*4882a593Smuzhiyun {"ad5260", AD5260_ID},
114*4882a593Smuzhiyun {"ad5262", AD5262_ID},
115*4882a593Smuzhiyun {"ad5263", AD5263_ID},
116*4882a593Smuzhiyun {"ad5290", AD5290_ID},
117*4882a593Smuzhiyun {"ad5291", AD5291_ID},
118*4882a593Smuzhiyun {"ad5292", AD5292_ID},
119*4882a593Smuzhiyun {"ad5293", AD5293_ID},
120*4882a593Smuzhiyun {"ad7376", AD7376_ID},
121*4882a593Smuzhiyun {"ad8400", AD8400_ID},
122*4882a593Smuzhiyun {"ad8402", AD8402_ID},
123*4882a593Smuzhiyun {"ad8403", AD8403_ID},
124*4882a593Smuzhiyun {"adn2850", ADN2850_ID},
125*4882a593Smuzhiyun {"ad5270", AD5270_ID},
126*4882a593Smuzhiyun {"ad5271", AD5271_ID},
127*4882a593Smuzhiyun {}
128*4882a593Smuzhiyun };
129*4882a593Smuzhiyun MODULE_DEVICE_TABLE(spi, ad_dpot_spi_id);
130*4882a593Smuzhiyun
131*4882a593Smuzhiyun static struct spi_driver ad_dpot_spi_driver = {
132*4882a593Smuzhiyun .driver = {
133*4882a593Smuzhiyun .name = "ad_dpot",
134*4882a593Smuzhiyun },
135*4882a593Smuzhiyun .probe = ad_dpot_spi_probe,
136*4882a593Smuzhiyun .remove = ad_dpot_spi_remove,
137*4882a593Smuzhiyun .id_table = ad_dpot_spi_id,
138*4882a593Smuzhiyun };
139*4882a593Smuzhiyun
140*4882a593Smuzhiyun module_spi_driver(ad_dpot_spi_driver);
141*4882a593Smuzhiyun
142*4882a593Smuzhiyun MODULE_AUTHOR("Michael Hennerich <michael.hennerich@analog.com>");
143*4882a593Smuzhiyun MODULE_DESCRIPTION("digital potentiometer SPI bus driver");
144*4882a593Smuzhiyun MODULE_LICENSE("GPL");
145*4882a593Smuzhiyun MODULE_ALIAS("spi:ad_dpot");
146