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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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