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  * @bits:               accuracy of the DAC in bits
  36  * @int_vref_mv:        AD5620/40/60: the internal reference voltage
  37  */
  38
  39 struct ad5624r_chip_info {
  40         u8                              bits;
  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
  55 struct ad5624r_state {
  56         struct iio_dev                  *indio_dev;
  57         struct spi_device               *us;
  58         const struct ad5624r_chip_info  *chip_info;
  59         struct regulator                *reg;
  60         unsigned short                  vref_mv;
  61         unsigned                        pwr_down_mask;
  62         unsigned                        pwr_down_mode;
  63 };
  64
  65 /**
  66  * ad5624r_supported_device_ids:
  67  * The AD5624/44/64 parts are available in different
  68  * fixed internal reference voltage options.
  69  */
  70
  71 enum ad5624r_supported_device_ids {
  72         ID_AD5624R3,
  73         ID_AD5644R3,
  74         ID_AD5664R3,
  75         ID_AD5624R5,
  76         ID_AD5644R5,
  77         ID_AD5664R5,
  78 };
  79
  80 #endif /* SPI_AD5624R_H_ */