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76 lines
2.0 KiB
76 lines
2.0 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* AD5592R / AD5593R Digital <-> Analog converters driver |
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* |
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* Copyright 2015-2016 Analog Devices Inc. |
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* Author: Paul Cercueil <[email protected]> |
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*/ |
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#ifndef __DRIVERS_IIO_DAC_AD5592R_BASE_H__ |
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#define __DRIVERS_IIO_DAC_AD5592R_BASE_H__ |
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#include <linux/types.h> |
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#include <linux/cache.h> |
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#include <linux/mutex.h> |
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#include <linux/gpio/driver.h> |
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struct device; |
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struct ad5592r_state; |
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enum ad5592r_registers { |
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AD5592R_REG_NOOP = 0x0, |
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AD5592R_REG_DAC_READBACK = 0x1, |
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AD5592R_REG_ADC_SEQ = 0x2, |
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AD5592R_REG_CTRL = 0x3, |
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AD5592R_REG_ADC_EN = 0x4, |
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AD5592R_REG_DAC_EN = 0x5, |
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AD5592R_REG_PULLDOWN = 0x6, |
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AD5592R_REG_LDAC = 0x7, |
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AD5592R_REG_GPIO_OUT_EN = 0x8, |
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AD5592R_REG_GPIO_SET = 0x9, |
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AD5592R_REG_GPIO_IN_EN = 0xA, |
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AD5592R_REG_PD = 0xB, |
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AD5592R_REG_OPEN_DRAIN = 0xC, |
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AD5592R_REG_TRISTATE = 0xD, |
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AD5592R_REG_RESET = 0xF, |
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}; |
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#define AD5592R_REG_PD_EN_REF BIT(9) |
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#define AD5592R_REG_CTRL_ADC_RANGE BIT(5) |
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#define AD5592R_REG_CTRL_DAC_RANGE BIT(4) |
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struct ad5592r_rw_ops { |
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int (*write_dac)(struct ad5592r_state *st, unsigned chan, u16 value); |
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int (*read_adc)(struct ad5592r_state *st, unsigned chan, u16 *value); |
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int (*reg_write)(struct ad5592r_state *st, u8 reg, u16 value); |
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int (*reg_read)(struct ad5592r_state *st, u8 reg, u16 *value); |
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int (*gpio_read)(struct ad5592r_state *st, u8 *value); |
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}; |
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struct ad5592r_state { |
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struct device *dev; |
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struct regulator *reg; |
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struct gpio_chip gpiochip; |
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struct mutex gpio_lock; /* Protect cached gpio_out, gpio_val, etc. */ |
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struct mutex lock; |
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unsigned int num_channels; |
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const struct ad5592r_rw_ops *ops; |
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int scale_avail[2][2]; |
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u16 cached_dac[8]; |
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u16 cached_gp_ctrl; |
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u8 channel_modes[8]; |
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u8 channel_offstate[8]; |
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u8 gpio_map; |
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u8 gpio_out; |
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u8 gpio_in; |
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u8 gpio_val; |
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__be16 spi_msg ____cacheline_aligned; |
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__be16 spi_msg_nop; |
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}; |
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int ad5592r_probe(struct device *dev, const char *name, |
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const struct ad5592r_rw_ops *ops); |
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int ad5592r_remove(struct device *dev); |
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#endif /* __DRIVERS_IIO_DAC_AD5592R_BASE_H__ */
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