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/*
* AD5592R / AD5593R Digital <-> Analog converters driver
*
* Copyright 2015-2016 Analog Devices Inc.
* Author: Paul Cercueil <paul.cercueil@analog.com>
*
* Licensed under the GPL-2.
*/
#ifndef __DRIVERS_IIO_DAC_AD5592R_BASE_H__
#define __DRIVERS_IIO_DAC_AD5592R_BASE_H__
#include <linux/types.h>
#include <linux/cache.h>
#include <linux/mutex.h>
#include <linux/gpio/driver.h>
struct device;
struct ad5592r_state;
enum ad5592r_registers {
AD5592R_REG_NOOP = 0x0,
AD5592R_REG_DAC_READBACK = 0x1,
AD5592R_REG_ADC_SEQ = 0x2,
AD5592R_REG_CTRL = 0x3,
AD5592R_REG_ADC_EN = 0x4,
AD5592R_REG_DAC_EN = 0x5,
AD5592R_REG_PULLDOWN = 0x6,
AD5592R_REG_LDAC = 0x7,
AD5592R_REG_GPIO_OUT_EN = 0x8,
AD5592R_REG_GPIO_SET = 0x9,
AD5592R_REG_GPIO_IN_EN = 0xA,
AD5592R_REG_PD = 0xB,
AD5592R_REG_OPEN_DRAIN = 0xC,
AD5592R_REG_TRISTATE = 0xD,
AD5592R_REG_RESET = 0xF,
};
#define AD5592R_REG_PD_EN_REF BIT(9)
#define AD5592R_REG_CTRL_ADC_RANGE BIT(5)
#define AD5592R_REG_CTRL_DAC_RANGE BIT(4)
struct ad5592r_rw_ops {
int (*write_dac)(struct ad5592r_state *st, unsigned chan, u16 value);
int (*read_adc)(struct ad5592r_state *st, unsigned chan, u16 *value);
int (*reg_write)(struct ad5592r_state *st, u8 reg, u16 value);
int (*reg_read)(struct ad5592r_state *st, u8 reg, u16 *value);
int (*gpio_read)(struct ad5592r_state *st, u8 *value);
};
struct ad5592r_state {
struct device *dev;
struct regulator *reg;
struct gpio_chip gpiochip;
struct mutex gpio_lock; /* Protect cached gpio_out, gpio_val, etc. */
unsigned int num_channels;
const struct ad5592r_rw_ops *ops;
int scale_avail[2][2];
u16 cached_dac[8];
u16 cached_gp_ctrl;
u8 channel_modes[8];
u8 channel_offstate[8];
u8 gpio_map;
u8 gpio_out;
u8 gpio_in;
u8 gpio_val;
__be16 spi_msg ____cacheline_aligned;
__be16 spi_msg_nop;
};
int ad5592r_probe(struct device *dev, const char *name,
const struct ad5592r_rw_ops *ops);
int ad5592r_remove(struct device *dev);
#endif /* __DRIVERS_IIO_DAC_AD5592R_BASE_H__ */
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