Release 4.18 drivers/iio/dac/ad5686.h
/* SPDX-License-Identifier: GPL-2.0+ */
/*
* This file is part of AD5686 DAC driver
*
* Copyright 2018 Analog Devices Inc.
*/
#ifndef __DRIVERS_IIO_DAC_AD5686_H__
#define __DRIVERS_IIO_DAC_AD5686_H__
#include <linux/types.h>
#include <linux/cache.h>
#include <linux/mutex.h>
#include <linux/kernel.h>
#define AD5683_DATA(x) ((x) << 4)
#define AD5686_ADDR(x) ((x) << 16)
#define AD5686_CMD(x) ((x) << 20)
#define AD5686_ADDR_DAC(chan) (0x1 << (chan))
#define AD5686_ADDR_ALL_DAC 0xF
#define AD5686_CMD_NOOP 0x0
#define AD5686_CMD_WRITE_INPUT_N 0x1
#define AD5686_CMD_UPDATE_DAC_N 0x2
#define AD5686_CMD_WRITE_INPUT_N_UPDATE_N 0x3
#define AD5686_CMD_POWERDOWN_DAC 0x4
#define AD5686_CMD_LDAC_MASK 0x5
#define AD5686_CMD_RESET 0x6
#define AD5686_CMD_INTERNAL_REFER_SETUP 0x7
#define AD5686_CMD_DAISY_CHAIN_ENABLE 0x8
#define AD5686_CMD_READBACK_ENABLE 0x9
#define AD5686_LDAC_PWRDN_NONE 0x0
#define AD5686_LDAC_PWRDN_1K 0x1
#define AD5686_LDAC_PWRDN_100K 0x2
#define AD5686_LDAC_PWRDN_3STATE 0x3
#define AD5686_CMD_CONTROL_REG 0x4
#define AD5686_CMD_READBACK_ENABLE_V2 0x5
#define AD5683_REF_BIT_MSK BIT(12)
#define AD5693_REF_BIT_MSK BIT(12)
/**
* ad5686_supported_device_ids:
*/
enum ad5686_supported_device_ids {
ID_AD5671R,
ID_AD5672R,
ID_AD5675R,
ID_AD5676,
ID_AD5676R,
ID_AD5681R,
ID_AD5682R,
ID_AD5683,
ID_AD5683R,
ID_AD5684,
ID_AD5684R,
ID_AD5685R,
ID_AD5686,
ID_AD5686R,
ID_AD5691R,
ID_AD5692R,
ID_AD5693,
ID_AD5693R,
ID_AD5694,
ID_AD5694R,
ID_AD5695R,
ID_AD5696,
ID_AD5696R,
};
enum ad5686_regmap_type {
AD5683_REGMAP,
AD5686_REGMAP,
AD5693_REGMAP
};
struct ad5686_state;
typedef int (*ad5686_write_func)(struct ad5686_state *st,
u8 cmd, u8 addr, u16 val);
typedef int (*ad5686_read_func)(struct ad5686_state *st, u8 addr);
/**
* struct ad5686_chip_info - chip specific information
* @int_vref_mv: AD5620/40/60: the internal reference voltage
* @num_channels: number of channels
* @channel: channel specification
* @regmap_type: register map layout variant
*/
struct ad5686_chip_info {
u16 int_vref_mv;
unsigned int num_channels;
struct iio_chan_spec *channels;
enum ad5686_regmap_type regmap_type;
};
/**
* struct ad5446_state - driver instance specific data
* @spi: spi_device
* @chip_info: chip model specific constants, available modes etc
* @reg: supply regulator
* @vref_mv: actual reference voltage used
* @pwr_down_mask: power down mask
* @pwr_down_mode: current power down mode
* @use_internal_vref: set to true if the internal reference voltage is used
* @data: spi transfer buffers
*/
struct ad5686_state {
struct device *dev;
const struct ad5686_chip_info *chip_info;
struct regulator *reg;
unsigned short vref_mv;
unsigned int pwr_down_mask;
unsigned int pwr_down_mode;
ad5686_write_func write;
ad5686_read_func read;
bool use_internal_vref;
/*
* DMA (thus cache coherency maintenance) requires the
* transfer buffers to live in their own cache lines.
*/
union {
__be32 d32;
__be16 d16;
u8 d8[4];
} data[3] ____cacheline_aligned;
};
int ad5686_probe(struct device *dev,
enum ad5686_supported_device_ids chip_type,
const char *name, ad5686_write_func write,
ad5686_read_func read);
int ad5686_remove(struct device *dev);
#endif /* __DRIVERS_IIO_DAC_AD5686_H__ */
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