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1/* SPDX-License-Identifier: GPL-2.0-only */2/*3 * AD5592R / AD5593R Digital <-> Analog converters driver4 *5 * Copyright 2015-2016 Analog Devices Inc.6 * Author: Paul Cercueil <paul.cercueil@analog.com>7 */8 9#ifndef __DRIVERS_IIO_DAC_AD5592R_BASE_H__10#define __DRIVERS_IIO_DAC_AD5592R_BASE_H__11 12#include <linux/types.h>13#include <linux/cache.h>14#include <linux/mutex.h>15#include <linux/gpio/driver.h>16 17#include <linux/iio/iio.h>18 19struct device;20struct ad5592r_state;21 22enum ad5592r_registers {23 AD5592R_REG_NOOP = 0x0,24 AD5592R_REG_DAC_READBACK = 0x1,25 AD5592R_REG_ADC_SEQ = 0x2,26 AD5592R_REG_CTRL = 0x3,27 AD5592R_REG_ADC_EN = 0x4,28 AD5592R_REG_DAC_EN = 0x5,29 AD5592R_REG_PULLDOWN = 0x6,30 AD5592R_REG_LDAC = 0x7,31 AD5592R_REG_GPIO_OUT_EN = 0x8,32 AD5592R_REG_GPIO_SET = 0x9,33 AD5592R_REG_GPIO_IN_EN = 0xA,34 AD5592R_REG_PD = 0xB,35 AD5592R_REG_OPEN_DRAIN = 0xC,36 AD5592R_REG_TRISTATE = 0xD,37 AD5592R_REG_RESET = 0xF,38};39 40#define AD5592R_REG_PD_EN_REF BIT(9)41#define AD5592R_REG_CTRL_ADC_RANGE BIT(5)42#define AD5592R_REG_CTRL_DAC_RANGE BIT(4)43 44struct ad5592r_rw_ops {45 int (*write_dac)(struct ad5592r_state *st, unsigned chan, u16 value);46 int (*read_adc)(struct ad5592r_state *st, unsigned chan, u16 *value);47 int (*reg_write)(struct ad5592r_state *st, u8 reg, u16 value);48 int (*reg_read)(struct ad5592r_state *st, u8 reg, u16 *value);49 int (*gpio_read)(struct ad5592r_state *st, u8 *value);50};51 52struct ad5592r_state {53 struct device *dev;54 struct regulator *reg;55 struct gpio_chip gpiochip;56 struct mutex gpio_lock; /* Protect cached gpio_out, gpio_val, etc. */57 struct mutex lock;58 unsigned int num_channels;59 const struct ad5592r_rw_ops *ops;60 int scale_avail[2][2];61 u16 cached_dac[8];62 u16 cached_gp_ctrl;63 u8 channel_modes[8];64 u8 channel_offstate[8];65 u8 gpio_map;66 u8 gpio_out;67 u8 gpio_in;68 u8 gpio_val;69 70 __be16 spi_msg __aligned(IIO_DMA_MINALIGN);71 __be16 spi_msg_nop;72};73 74int ad5592r_probe(struct device *dev, const char *name,75 const struct ad5592r_rw_ops *ops);76void ad5592r_remove(struct device *dev);77 78#endif /* __DRIVERS_IIO_DAC_AD5592R_BASE_H__ */79