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/*
* AD5504 SPI DAC driver
*
* Copyright 2011 Analog Devices Inc.
*
* Licensed under the GPL-2.
*/
#ifndef SPI_AD5504_H_
#define SPI_AD5504_H_
#define AD5505_BITS 12
#define AD5504_RES_MASK ((1 << (AD5505_BITS)) - 1)
#define AD5504_CMD_READ (1 << 15)
#define AD5504_CMD_WRITE (0 << 15)
#define AD5504_ADDR(addr) ((addr) << 12)
/* Registers */
#define AD5504_ADDR_NOOP 0
#define AD5504_ADDR_DAC0 1
#define AD5504_ADDR_DAC1 2
#define AD5504_ADDR_DAC2 3
#define AD5504_ADDR_DAC3 4
#define AD5504_ADDR_ALL_DAC 5
#define AD5504_ADDR_CTRL 7
/* Control Register */
#define AD5504_DAC_PWR(ch) ((ch) << 2)
#define AD5504_DAC_PWRDWN_MODE(mode) ((mode) << 6)
#define AD5504_DAC_PWRDN_20K 0
#define AD5504_DAC_PWRDN_3STATE 1
/*
* TODO: struct ad5504_platform_data needs to go into include/linux/iio
*/
struct ad5504_platform_data {
u16 vref_mv;
};
/**
* struct ad5446_state - driver instance specific data
* @us: spi_device
* @reg: supply regulator
* @vref_mv: actual reference voltage used
* @pwr_down_mask power down mask
* @pwr_down_mode current power down mode
*/
struct ad5504_state {
struct spi_device *spi;
struct regulator *reg;
unsigned short vref_mv;
unsigned pwr_down_mask;
unsigned pwr_down_mode;
};
/**
* ad5504_supported_device_ids:
*/
enum ad5504_supported_device_ids {
ID_AD5504,
ID_AD5501,
};
#endif /* SPI_AD5504_H_ */
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