drivers/iio/dac/ad5446.h

   1 /*
   2  * AD5446 SPI DAC driver
   3  *
   4  * Copyright 2010 Analog Devices Inc.
   5  *
   6  * Licensed under the GPL-2 or later.
   7  */
   8 #ifndef IIO_DAC_AD5446_H_
   9 #define IIO_DAC_AD5446_H_
  10
  11 /* DAC Control Bits */
  12
  13 #define AD5446_LOAD             (0x0 << 14) /* Load and update */
  14 #define AD5446_SDO_DIS          (0x1 << 14) /* Disable SDO */
  15 #define AD5446_NOP              (0x2 << 14) /* No operation */
  16 #define AD5446_CLK_RISING       (0x3 << 14) /* Clock data on rising edge */
  17
  18 #define AD5620_LOAD             (0x0 << 14) /* Load and update Norm Operation*/
  19 #define AD5620_PWRDWN_1k        (0x1 << 14) /* Power-down: 1kOhm to GND */
  20 #define AD5620_PWRDWN_100k      (0x2 << 14) /* Power-down: 100kOhm to GND */
  21 #define AD5620_PWRDWN_TRISTATE  (0x3 << 14) /* Power-down: Three-state */
  22
  23 #define AD5660_LOAD             (0x0 << 16) /* Load and update Norm Operation*/
  24 #define AD5660_PWRDWN_1k        (0x1 << 16) /* Power-down: 1kOhm to GND */
  25 #define AD5660_PWRDWN_100k      (0x2 << 16) /* Power-down: 100kOhm to GND */
  26 #define AD5660_PWRDWN_TRISTATE  (0x3 << 16) /* Power-down: Three-state */
  27
  28 #define MODE_PWRDWN_1k          0x1
  29 #define MODE_PWRDWN_100k        0x2
  30 #define MODE_PWRDWN_TRISTATE    0x3
  31
  32 /**
  33  * struct ad5446_state - driver instance specific data
  34  * @spi:                spi_device
  35  * @chip_info:          chip model specific constants, available modes etc
  36  * @reg:                supply regulator
  37  * @vref_mv:            actual reference voltage used
  38  */
  39
  40 struct ad5446_state {
  41         struct spi_device               *spi;
  42         const struct ad5446_chip_info   *chip_info;
  43         struct regulator                *reg;
  44         unsigned short                  vref_mv;
  45         unsigned                        cached_val;
  46         unsigned                        pwr_down_mode;
  47         unsigned                        pwr_down;
  48 };
  49
  50 /**
  51  * struct ad5446_chip_info - chip specific information
  52  * @channel:            channel spec for the DAC
  53  * @int_vref_mv:        AD5620/40/60: the internal reference voltage
  54  * @write:              chip specific helper function to write to the register
  55  */
  56
  57 struct ad5446_chip_info {
  58         struct iio_chan_spec    channel;
  59         u16                     int_vref_mv;
  60         int                     (*write)(struct ad5446_state *st, unsigned val);
  61 };
  62
  63 /**
  64  * ad5446_supported_device_ids:
  65  * The AD5620/40/60 parts are available in different fixed internal reference
  66  * voltage options. The actual part numbers may look differently
  67  * (and a bit cryptic), however this style is used to make clear which
  68  * parts are supported here.
  69  */
  70
  71 enum ad5446_supported_device_ids {
  72         ID_AD5444,
  73         ID_AD5446,
  74         ID_AD5450,
  75         ID_AD5451,
  76         ID_AD5541A,
  77         ID_AD5512A,
  78         ID_AD5553,
  79         ID_AD5601,
  80         ID_AD5611,
  81         ID_AD5621,
  82         ID_AD5620_2500,
  83         ID_AD5620_1250,
  84         ID_AD5640_2500,
  85         ID_AD5640_1250,
  86         ID_AD5660_2500,
  87         ID_AD5660_1250,
  88         ID_AD5662,
  89 };
  90
  91 #endif /* IIO_DAC_AD5446_H_ */