LXR linux/drivers/staging/iio/dac/ad5624r.h

   1/*
   2 * AD5624R SPI DAC driver
   3 *
   4 * Copyright 2010-2011 Analog Devices Inc.
   5 *
   6 * Licensed under the GPL-2.
   7 */
   8#ifndef SPI_AD5624R_H_
   9#define SPI_AD5624R_H_
  10
  11#define AD5624R_DAC_CHANNELS                    4
  12
  13#define AD5624R_ADDR_DAC0                       0x0
  14#define AD5624R_ADDR_DAC1                       0x1
  15#define AD5624R_ADDR_DAC2                       0x2
  16#define AD5624R_ADDR_DAC3                       0x3
  17#define AD5624R_ADDR_ALL_DAC                    0x7
  18
  19#define AD5624R_CMD_WRITE_INPUT_N               0x0
  20#define AD5624R_CMD_UPDATE_DAC_N                0x1
  21#define AD5624R_CMD_WRITE_INPUT_N_UPDATE_ALL    0x2
  22#define AD5624R_CMD_WRITE_INPUT_N_UPDATE_N      0x3
  23#define AD5624R_CMD_POWERDOWN_DAC               0x4
  24#define AD5624R_CMD_RESET                       0x5
  25#define AD5624R_CMD_LDAC_SETUP                  0x6
  26#define AD5624R_CMD_INTERNAL_REFER_SETUP        0x7
  27
  28#define AD5624R_LDAC_PWRDN_NONE                 0x0
  29#define AD5624R_LDAC_PWRDN_1K                   0x1
  30#define AD5624R_LDAC_PWRDN_100K                 0x2
  31#define AD5624R_LDAC_PWRDN_3STATE               0x3
  32
  33/**
  34 * struct ad5624r_chip_info - chip specific information
  35 * @channels:           channel spec for the DAC
  36 * @int_vref_mv:        AD5620/40/60: the internal reference voltage
  37 */
  38
  39struct ad5624r_chip_info {
  40        const struct iio_chan_spec      *channels;
  41        u16                             int_vref_mv;
  42};
  43
  44/**
  45 * struct ad5446_state - driver instance specific data
  46 * @indio_dev:          the industrial I/O device
  47 * @us:                 spi_device
  48 * @chip_info:          chip model specific constants, available modes etc
  49 * @reg:                supply regulator
  50 * @vref_mv:            actual reference voltage used
  51 * @pwr_down_mask       power down mask
  52 * @pwr_down_mode       current power down mode
  53 */
  54
  55struct ad5624r_state {
  56        struct spi_device               *us;
  57        const struct ad5624r_chip_info  *chip_info;
  58        struct regulator                *reg;
  59        unsigned short                  vref_mv;
  60        unsigned                        pwr_down_mask;
  61        unsigned                        pwr_down_mode;
  62};
  63
  64/**
  65 * ad5624r_supported_device_ids:
  66 * The AD5624/44/64 parts are available in different
  67 * fixed internal reference voltage options.
  68 */
  69
  70enum ad5624r_supported_device_ids {
  71        ID_AD5624R3,
  72        ID_AD5644R3,
  73        ID_AD5664R3,
  74        ID_AD5624R5,
  75        ID_AD5644R5,
  76        ID_AD5664R5,
  77};
  78
  79#endif /* SPI_AD5624R_H_ */
  80