drivers/staging/iio/dac/ad5504.h

   1 /*
   2  * AD5504 SPI DAC driver
   3  *
   4  * Copyright 2011 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2.
   7  */
   8
   9 #ifndef SPI_AD5504_H_
  10 #define SPI_AD5504_H_
  11
  12 #define AD5505_BITS                     12
  13 #define AD5504_RES_MASK                 ((1 << (AD5505_BITS)) - 1)
  14
  15 #define AD5504_CMD_READ                 (1 << 15)
  16 #define AD5504_CMD_WRITE                (0 << 15)
  17 #define AD5504_ADDR(addr)               ((addr) << 12)
  18
  19 /* Registers */
  20 #define AD5504_ADDR_NOOP                0
  21 #define AD5504_ADDR_DAC(x)              ((x) + 1)
  22 #define AD5504_ADDR_ALL_DAC             5
  23 #define AD5504_ADDR_CTRL                7
  24
  25 /* Control Register */
  26 #define AD5504_DAC_PWR(ch)              ((ch) << 2)
  27 #define AD5504_DAC_PWRDWN_MODE(mode)    ((mode) << 6)
  28 #define AD5504_DAC_PWRDN_20K            0
  29 #define AD5504_DAC_PWRDN_3STATE         1
  30
  31 /*
  32  * TODO: struct ad5504_platform_data needs to go into include/linux/iio
  33  */
  34
  35 struct ad5504_platform_data {
  36         u16                             vref_mv;
  37 };
  38
  39 /**
  40  * struct ad5446_state - driver instance specific data
  41  * @us:                 spi_device
  42  * @reg:                supply regulator
  43  * @vref_mv:            actual reference voltage used
  44  * @pwr_down_mask       power down mask
  45  * @pwr_down_mode       current power down mode
  46  */
  47
  48 struct ad5504_state {
  49         struct spi_device               *spi;
  50         struct regulator                *reg;
  51         unsigned short                  vref_mv;
  52         unsigned                        pwr_down_mask;
  53         unsigned                        pwr_down_mode;
  54 };
  55
  56 /**
  57  * ad5504_supported_device_ids:
  58  */
  59
  60 enum ad5504_supported_device_ids {
  61         ID_AD5504,
  62         ID_AD5501,
  63 };
  64
  65 #endif /* SPI_AD5504_H_ */