2 * AD5593R Digital <-> Analog converters driver
4 * Copyright 2015-2016 Analog Devices Inc.
5 * Author: Paul Cercueil <paul.cercueil@analog.com>
7 * Licensed under the GPL-2.
10 #include "ad5592r-base.h"
12 #include <linux/bitops.h>
13 #include <linux/i2c.h>
14 #include <linux/module.h>
17 #include <asm/unaligned.h>
19 #define AD5593R_MODE_CONF (0 << 4)
20 #define AD5593R_MODE_DAC_WRITE (1 << 4)
21 #define AD5593R_MODE_ADC_READBACK (4 << 4)
22 #define AD5593R_MODE_DAC_READBACK (5 << 4)
23 #define AD5593R_MODE_GPIO_READBACK (6 << 4)
24 #define AD5593R_MODE_REG_READBACK (7 << 4)
26 static int ad5593r_read_word(struct i2c_client *i2c, u8 reg, u16 *value)
31 ret = i2c_smbus_write_byte(i2c, reg);
35 ret = i2c_master_recv(i2c, buf, sizeof(buf));
39 *value = get_unaligned_be16(buf);
44 static int ad5593r_write_dac(struct ad5592r_state *st, unsigned chan, u16 value)
46 struct i2c_client *i2c = to_i2c_client(st->dev);
48 return i2c_smbus_write_word_swapped(i2c,
49 AD5593R_MODE_DAC_WRITE | chan, value);
52 static int ad5593r_read_adc(struct ad5592r_state *st, unsigned chan, u16 *value)
54 struct i2c_client *i2c = to_i2c_client(st->dev);
57 val = i2c_smbus_write_word_swapped(i2c,
58 AD5593R_MODE_CONF | AD5592R_REG_ADC_SEQ, BIT(chan));
62 return ad5593r_read_word(i2c, AD5593R_MODE_ADC_READBACK, value);
65 static int ad5593r_reg_write(struct ad5592r_state *st, u8 reg, u16 value)
67 struct i2c_client *i2c = to_i2c_client(st->dev);
69 return i2c_smbus_write_word_swapped(i2c,
70 AD5593R_MODE_CONF | reg, value);
73 static int ad5593r_reg_read(struct ad5592r_state *st, u8 reg, u16 *value)
75 struct i2c_client *i2c = to_i2c_client(st->dev);
77 return ad5593r_read_word(i2c, AD5593R_MODE_REG_READBACK | reg, value);
80 static int ad5593r_gpio_read(struct ad5592r_state *st, u8 *value)
82 struct i2c_client *i2c = to_i2c_client(st->dev);
86 ret = ad5593r_read_word(i2c, AD5593R_MODE_GPIO_READBACK, &val);
95 static const struct ad5592r_rw_ops ad5593r_rw_ops = {
96 .write_dac = ad5593r_write_dac,
97 .read_adc = ad5593r_read_adc,
98 .reg_write = ad5593r_reg_write,
99 .reg_read = ad5593r_reg_read,
100 .gpio_read = ad5593r_gpio_read,
103 static int ad5593r_i2c_probe(struct i2c_client *i2c,
104 const struct i2c_device_id *id)
106 return ad5592r_probe(&i2c->dev, id->name, &ad5593r_rw_ops);
109 static int ad5593r_i2c_remove(struct i2c_client *i2c)
111 return ad5592r_remove(&i2c->dev);
114 static const struct i2c_device_id ad5593r_i2c_ids[] = {
115 { .name = "ad5593r", },
118 MODULE_DEVICE_TABLE(i2c, ad5593r_i2c_ids);
120 static const struct of_device_id ad5593r_of_match[] = {
121 { .compatible = "adi,ad5593r", },
124 MODULE_DEVICE_TABLE(of, ad5593r_of_match);
126 static struct i2c_driver ad5593r_driver = {
129 .of_match_table = of_match_ptr(ad5593r_of_match),
131 .probe = ad5593r_i2c_probe,
132 .remove = ad5593r_i2c_remove,
133 .id_table = ad5593r_i2c_ids,
135 module_i2c_driver(ad5593r_driver);
137 MODULE_AUTHOR("Paul Cercueil <paul.cercueil@analog.com>");
138 MODULE_DESCRIPTION("Analog Devices AD5592R multi-channel converters");
139 MODULE_LICENSE("GPL v2");