forked from luck/tmp_suning_uos_patched
56ca9db862
This patch adds support for the AD5592R (spi) and AD5593R (i2c) ADC/DAC/GPIO devices. Signed-off-by: Paul Cercueil <paul.cercueil@analog.com> Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/*
|
|
* 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__ */
|