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/* SPDX-License-Identifier: GPL-2.0 */
/*
* AD7091RX Analog to Digital converter driver
*
* Copyright 2014-2019 Analog Devices Inc.
*/
#ifndef __DRIVERS_IIO_ADC_AD7091R_BASE_H__
#define __DRIVERS_IIO_ADC_AD7091R_BASE_H__
#define AD7091R_REG_RESULT 0
#define AD7091R_REG_CHANNEL 1
#define AD7091R_REG_CONF 2
#define AD7091R_REG_ALERT 3
#define AD7091R_REG_CH_LOW_LIMIT(ch) ((ch) * 3 + 4)
#define AD7091R_REG_CH_HIGH_LIMIT(ch) ((ch) * 3 + 5)
#define AD7091R_REG_CH_HYSTERESIS(ch) ((ch) * 3 + 6)
#define AD7091R_REG_CONF_INT_VREF BIT(0)
/* AD7091R_REG_CH_LIMIT */
#define AD7091R_HIGH_LIMIT 0xFFF
#define AD7091R_LOW_LIMIT 0x0
#define AD7091R_CHANNEL(idx, bits, ev, num_ev) { \
.type = IIO_VOLTAGE, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
.indexed = 1, \
.channel = idx, \
.event_spec = ev, \
.num_event_specs = num_ev, \
.scan_type.storagebits = 16, \
.scan_type.realbits = bits, \
}
struct device;
enum ad7091r_mode {
AD7091R_MODE_SAMPLE,
AD7091R_MODE_COMMAND,
AD7091R_MODE_AUTOCYCLE,
};
struct ad7091r_state {
struct device *dev;
struct regmap *map;
struct regulator *vref;
const struct ad7091r_chip_info *chip_info;
enum ad7091r_mode mode;
struct mutex lock; /*lock to prevent concurent reads */
};
struct ad7091r_chip_info {
unsigned int num_channels;
const struct iio_chan_spec *channels;
unsigned int vref_mV;
};
extern const struct iio_event_spec ad7091r_events[3];
extern const struct regmap_config ad7091r_regmap_config;
int ad7091r_probe(struct device *dev, const char *name,
const struct ad7091r_chip_info *chip_info,
struct regmap *map, int irq);
bool ad7091r_volatile_reg(struct device *dev, unsigned int reg);
bool ad7091r_writeable_reg(struct device *dev, unsigned int reg);
#endif /* __DRIVERS_IIO_ADC_AD7091R_BASE_H__ */
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