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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_AD5446_H
#define _LINUX_AD5446_H
#include <linux/bits.h>
#include <linux/compiler.h>
#include <linux/iio/iio.h>
#include <linux/mutex.h>
#include <linux/types.h>
struct device;
extern const struct iio_chan_spec_ext_info ad5446_ext_info_powerdown[];
#define _AD5446_CHANNEL(bits, storage, _shift, ext) { \
.type = IIO_VOLTAGE, \
.indexed = 1, \
.output = 1, \
.channel = 0, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
.scan_type = { \
.sign = 'u', \
.realbits = (bits), \
.storagebits = (storage), \
.shift = (_shift), \
}, \
.ext_info = (ext), \
}
#define AD5446_CHANNEL(bits, storage, shift) \
_AD5446_CHANNEL(bits, storage, shift, NULL)
#define AD5446_CHANNEL_POWERDOWN(bits, storage, shift) \
_AD5446_CHANNEL(bits, storage, shift, ad5446_ext_info_powerdown)
/**
* struct ad5446_state - driver instance specific data
* @dev: this device
* @chip_info: chip model specific constants, available modes etc
* @vref_mv: actual reference voltage used
* @cached_val: store/retrieve values during power down
* @pwr_down_mode: power down mode (1k, 100k or tristate)
* @pwr_down: true if the device is in power down
* @lock: lock to protect the data buffer during write ops
*/
struct ad5446_state {
struct device *dev;
const struct ad5446_chip_info *chip_info;
unsigned short vref_mv;
unsigned int cached_val;
unsigned int pwr_down_mode;
unsigned int pwr_down;
/* mutex to protect device shared data */
struct mutex lock;
union {
__be16 d16;
u8 d24[3];
} __aligned(IIO_DMA_MINALIGN);
};
/**
* 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 int val);
};
int ad5446_probe(struct device *dev, const char *name,
const struct ad5446_chip_info *chip_info);
#endif
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