mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 22:06:40 +07:00
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>
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
|
|
* AD5446 SPI DAC driver
|
|
*
|
|
* Copyright 2010 Analog Devices Inc.
|
|
*
|
|
* Licensed under the GPL-2 or later.
|
|
*/
|
|
#ifndef IIO_DAC_AD5446_H_
|
|
#define IIO_DAC_AD5446_H_
|
|
|
|
/* DAC Control Bits */
|
|
|
|
#define AD5446_LOAD (0x0 << 14) /* Load and update */
|
|
#define AD5446_SDO_DIS (0x1 << 14) /* Disable SDO */
|
|
#define AD5446_NOP (0x2 << 14) /* No operation */
|
|
#define AD5446_CLK_RISING (0x3 << 14) /* Clock data on rising edge */
|
|
|
|
#define AD5620_LOAD (0x0 << 14) /* Load and update Norm Operation*/
|
|
#define AD5620_PWRDWN_1k (0x1 << 14) /* Power-down: 1kOhm to GND */
|
|
#define AD5620_PWRDWN_100k (0x2 << 14) /* Power-down: 100kOhm to GND */
|
|
#define AD5620_PWRDWN_TRISTATE (0x3 << 14) /* Power-down: Three-state */
|
|
|
|
#define AD5660_LOAD (0x0 << 16) /* Load and update Norm Operation*/
|
|
#define AD5660_PWRDWN_1k (0x1 << 16) /* Power-down: 1kOhm to GND */
|
|
#define AD5660_PWRDWN_100k (0x2 << 16) /* Power-down: 100kOhm to GND */
|
|
#define AD5660_PWRDWN_TRISTATE (0x3 << 16) /* Power-down: Three-state */
|
|
|
|
#define MODE_PWRDWN_1k 0x1
|
|
#define MODE_PWRDWN_100k 0x2
|
|
#define MODE_PWRDWN_TRISTATE 0x3
|
|
|
|
/**
|
|
* struct ad5446_state - driver instance specific data
|
|
* @spi: spi_device
|
|
* @chip_info: chip model specific constants, available modes etc
|
|
* @reg: supply regulator
|
|
* @vref_mv: actual reference voltage used
|
|
*/
|
|
|
|
struct ad5446_state {
|
|
struct spi_device *spi;
|
|
const struct ad5446_chip_info *chip_info;
|
|
struct regulator *reg;
|
|
unsigned short vref_mv;
|
|
unsigned cached_val;
|
|
unsigned pwr_down_mode;
|
|
unsigned pwr_down;
|
|
};
|
|
|
|
/**
|
|
* struct ad5446_chip_info - chip specific information
|
|
* @channel: channel spec for the DAC
|
|
* @int_vref_mv: AD5620/40/60: the internal reference voltage
|
|
* @write: chip specific helper function to write to the register
|
|
*/
|
|
|
|
struct ad5446_chip_info {
|
|
struct iio_chan_spec channel;
|
|
u16 int_vref_mv;
|
|
int (*write)(struct ad5446_state *st, unsigned val);
|
|
};
|
|
|
|
/**
|
|
* ad5446_supported_device_ids:
|
|
* The AD5620/40/60 parts are available in different fixed internal reference
|
|
* voltage options. The actual part numbers may look differently
|
|
* (and a bit cryptic), however this style is used to make clear which
|
|
* parts are supported here.
|
|
*/
|
|
|
|
enum ad5446_supported_device_ids {
|
|
ID_AD5444,
|
|
ID_AD5446,
|
|
ID_AD5450,
|
|
ID_AD5451,
|
|
ID_AD5541A,
|
|
ID_AD5512A,
|
|
ID_AD5553,
|
|
ID_AD5601,
|
|
ID_AD5611,
|
|
ID_AD5621,
|
|
ID_AD5620_2500,
|
|
ID_AD5620_1250,
|
|
ID_AD5640_2500,
|
|
ID_AD5640_1250,
|
|
ID_AD5660_2500,
|
|
ID_AD5660_1250,
|
|
ID_AD5662,
|
|
};
|
|
|
|
#endif /* IIO_DAC_AD5446_H_ */
|