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