779c0c4619
This patch adds support for the Analog Devices AD5450/51/52/53 Digital-to-Analog converters. The AD5452 and AD5453 are software compatible to the existing AD5444 and AD5446. The AD5450 and AD5451 are similar but have a smaller resolution. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Jonathan Cameron <jic23@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
91 lines
2.4 KiB
C
91 lines
2.4 KiB
C
/*
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* AD5446 SPI DAC driver
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*
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* Copyright 2010 Analog Devices Inc.
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*
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* Licensed under the GPL-2 or later.
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*/
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#ifndef IIO_DAC_AD5446_H_
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#define IIO_DAC_AD5446_H_
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/* DAC Control Bits */
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#define AD5446_LOAD (0x0 << 14) /* Load and update */
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#define AD5446_SDO_DIS (0x1 << 14) /* Disable SDO */
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#define AD5446_NOP (0x2 << 14) /* No operation */
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#define AD5446_CLK_RISING (0x3 << 14) /* Clock data on rising edge */
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#define AD5620_LOAD (0x0 << 14) /* Load and update Norm Operation*/
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#define AD5620_PWRDWN_1k (0x1 << 14) /* Power-down: 1kOhm to GND */
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#define AD5620_PWRDWN_100k (0x2 << 14) /* Power-down: 100kOhm to GND */
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#define AD5620_PWRDWN_TRISTATE (0x3 << 14) /* Power-down: Three-state */
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#define AD5660_LOAD (0x0 << 16) /* Load and update Norm Operation*/
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#define AD5660_PWRDWN_1k (0x1 << 16) /* Power-down: 1kOhm to GND */
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#define AD5660_PWRDWN_100k (0x2 << 16) /* Power-down: 100kOhm to GND */
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#define AD5660_PWRDWN_TRISTATE (0x3 << 16) /* Power-down: Three-state */
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#define MODE_PWRDWN_1k 0x1
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#define MODE_PWRDWN_100k 0x2
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#define MODE_PWRDWN_TRISTATE 0x3
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/**
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* struct ad5446_state - driver instance specific data
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* @spi: spi_device
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* @chip_info: chip model specific constants, available modes etc
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* @reg: supply regulator
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* @vref_mv: actual reference voltage used
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*/
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struct ad5446_state {
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struct spi_device *spi;
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const struct ad5446_chip_info *chip_info;
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struct regulator *reg;
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unsigned short vref_mv;
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unsigned cached_val;
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unsigned pwr_down_mode;
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unsigned pwr_down;
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};
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/**
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* struct ad5446_chip_info - chip specific information
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* @channel: channel spec for the DAC
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* @int_vref_mv: AD5620/40/60: the internal reference voltage
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* @write: chip specific helper function to write to the register
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*/
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struct ad5446_chip_info {
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struct iio_chan_spec channel;
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u16 int_vref_mv;
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int (*write)(struct ad5446_state *st, unsigned val);
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};
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/**
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* ad5446_supported_device_ids:
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* The AD5620/40/60 parts are available in different fixed internal reference
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* voltage options. The actual part numbers may look differently
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* (and a bit cryptic), however this style is used to make clear which
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* parts are supported here.
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*/
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enum ad5446_supported_device_ids {
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ID_AD5444,
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ID_AD5446,
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ID_AD5450,
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ID_AD5451,
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ID_AD5541A,
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ID_AD5512A,
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ID_AD5553,
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ID_AD5601,
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ID_AD5611,
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ID_AD5621,
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ID_AD5620_2500,
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ID_AD5620_1250,
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ID_AD5640_2500,
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ID_AD5640_1250,
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ID_AD5660_2500,
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ID_AD5660_1250,
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ID_AD5662,
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};
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#endif /* IIO_DAC_AD5446_H_ */
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