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_DAC0                1
  22 #define AD5504_ADDR_DAC1                2
  23 #define AD5504_ADDR_DAC2                3
  24 #define AD5504_ADDR_DAC3                4
  25 #define AD5504_ADDR_ALL_DAC             5
  26 #define AD5504_ADDR_CTRL                7
  27
  28 /* Control Register */
  29 #define AD5504_DAC_PWR(ch)              ((ch) << 2)
  30 #define AD5504_DAC_PWRDWN_MODE(mode)    ((mode) << 6)
  31 #define AD5504_DAC_PWRDN_20K            0
  32 #define AD5504_DAC_PWRDN_3STATE         1
  33
  34 /*
  35  * TODO: struct ad5504_platform_data needs to go into include/linux/iio
  36  */
  37
  38 struct ad5504_platform_data {
  39         u16                             vref_mv;
  40 };
  41
  42 /**
  43  * struct ad5446_state - driver instance specific data
  44  * @us:                 spi_device
  45  * @reg:                supply regulator
  46  * @vref_mv:            actual reference voltage used
  47  * @pwr_down_mask       power down mask
  48  * @pwr_down_mode       current power down mode
  49  */
  50
  51 struct ad5504_state {
  52         struct spi_device               *spi;
  53         struct regulator                *reg;
  54         unsigned short                  vref_mv;
  55         unsigned                        pwr_down_mask;
  56         unsigned                        pwr_down_mode;
  57 };
  58
  59 /**
  60  * ad5504_supported_device_ids:
  61  */
  62
  63 enum ad5504_supported_device_ids {
  64         ID_AD5504,
  65         ID_AD5501,
  66 };
  67
  68 #endif /* SPI_AD5504_H_ */