139 lines
3.3 KiB
C
139 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* AD5593R Digital <-> Analog converters driver
|
|
*
|
|
* Copyright 2015-2016 Analog Devices Inc.
|
|
* Author: Paul Cercueil <paul.cercueil@analog.com>
|
|
*/
|
|
|
|
#include "ad5592r-base.h"
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/acpi.h>
|
|
|
|
#define AD5593R_MODE_CONF (0 << 4)
|
|
#define AD5593R_MODE_DAC_WRITE (1 << 4)
|
|
#define AD5593R_MODE_ADC_READBACK (4 << 4)
|
|
#define AD5593R_MODE_DAC_READBACK (5 << 4)
|
|
#define AD5593R_MODE_GPIO_READBACK (6 << 4)
|
|
#define AD5593R_MODE_REG_READBACK (7 << 4)
|
|
|
|
static int ad5593r_write_dac(struct ad5592r_state *st, unsigned chan, u16 value)
|
|
{
|
|
struct i2c_client *i2c = to_i2c_client(st->dev);
|
|
|
|
return i2c_smbus_write_word_swapped(i2c,
|
|
AD5593R_MODE_DAC_WRITE | chan, value);
|
|
}
|
|
|
|
static int ad5593r_read_adc(struct ad5592r_state *st, unsigned chan, u16 *value)
|
|
{
|
|
struct i2c_client *i2c = to_i2c_client(st->dev);
|
|
s32 val;
|
|
|
|
val = i2c_smbus_write_word_swapped(i2c,
|
|
AD5593R_MODE_CONF | AD5592R_REG_ADC_SEQ, BIT(chan));
|
|
if (val < 0)
|
|
return (int) val;
|
|
|
|
val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_ADC_READBACK);
|
|
if (val < 0)
|
|
return (int) val;
|
|
|
|
*value = (u16) val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ad5593r_reg_write(struct ad5592r_state *st, u8 reg, u16 value)
|
|
{
|
|
struct i2c_client *i2c = to_i2c_client(st->dev);
|
|
|
|
return i2c_smbus_write_word_swapped(i2c,
|
|
AD5593R_MODE_CONF | reg, value);
|
|
}
|
|
|
|
static int ad5593r_reg_read(struct ad5592r_state *st, u8 reg, u16 *value)
|
|
{
|
|
struct i2c_client *i2c = to_i2c_client(st->dev);
|
|
s32 val;
|
|
|
|
val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_REG_READBACK | reg);
|
|
if (val < 0)
|
|
return (int) val;
|
|
|
|
*value = (u16) val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ad5593r_gpio_read(struct ad5592r_state *st, u8 *value)
|
|
{
|
|
struct i2c_client *i2c = to_i2c_client(st->dev);
|
|
s32 val;
|
|
|
|
val = i2c_smbus_read_word_swapped(i2c, AD5593R_MODE_GPIO_READBACK);
|
|
if (val < 0)
|
|
return (int) val;
|
|
|
|
*value = (u8) val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct ad5592r_rw_ops ad5593r_rw_ops = {
|
|
.write_dac = ad5593r_write_dac,
|
|
.read_adc = ad5593r_read_adc,
|
|
.reg_write = ad5593r_reg_write,
|
|
.reg_read = ad5593r_reg_read,
|
|
.gpio_read = ad5593r_gpio_read,
|
|
};
|
|
|
|
static int ad5593r_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
return ad5592r_probe(&i2c->dev, id->name, &ad5593r_rw_ops);
|
|
}
|
|
|
|
static int ad5593r_i2c_remove(struct i2c_client *i2c)
|
|
{
|
|
return ad5592r_remove(&i2c->dev);
|
|
}
|
|
|
|
static const struct i2c_device_id ad5593r_i2c_ids[] = {
|
|
{ .name = "ad5593r", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, ad5593r_i2c_ids);
|
|
|
|
static const struct of_device_id ad5593r_of_match[] = {
|
|
{ .compatible = "adi,ad5593r", },
|
|
{},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, ad5593r_of_match);
|
|
|
|
static const struct acpi_device_id ad5593r_acpi_match[] = {
|
|
{"ADS5593", },
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(acpi, ad5593r_acpi_match);
|
|
|
|
static struct i2c_driver ad5593r_driver = {
|
|
.driver = {
|
|
.name = "ad5593r",
|
|
.of_match_table = of_match_ptr(ad5593r_of_match),
|
|
.acpi_match_table = ACPI_PTR(ad5593r_acpi_match),
|
|
},
|
|
.probe = ad5593r_i2c_probe,
|
|
.remove = ad5593r_i2c_remove,
|
|
.id_table = ad5593r_i2c_ids,
|
|
};
|
|
module_i2c_driver(ad5593r_driver);
|
|
|
|
MODULE_AUTHOR("Paul Cercueil <paul.cercueil@analog.com>");
|
|
MODULE_DESCRIPTION("Analog Devices AD5592R multi-channel converters");
|
|
MODULE_LICENSE("GPL v2");
|