/* SPDX-License-Identifier: GPL-2.0-only */ /* * AD5592R / AD5593R Digital <-> Analog converters driver * * Copyright 2015-2016 Analog Devices Inc. * Author: Paul Cercueil <paul.cercueil@analog.com> */ #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__ */