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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__
#include <linux/regmap.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)
/* AD7091R_REG_RESULT */
#define AD7091R5_REG_RESULT_CH_ID(x) (((x) >> 13) & 0x3)
#define AD7091R8_REG_RESULT_CH_ID(x) (((x) >> 13) & 0x7)
#define AD7091R_REG_RESULT_CONV_RESULT(x) ((x) & 0xfff)
/* AD7091R_REG_CONF */
#define AD7091R_REG_CONF_INT_VREF BIT(0)
#define AD7091R_REG_CONF_ALERT_EN BIT(4)
#define AD7091R_REG_CONF_AUTO BIT(8)
#define AD7091R_REG_CONF_CMD BIT(10)
#define AD7091R_REG_CONF_MODE_MASK \
(AD7091R_REG_CONF_AUTO | AD7091R_REG_CONF_CMD)
/* 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;
struct gpio_desc;
enum ad7091r_mode {
AD7091R_MODE_SAMPLE,
AD7091R_MODE_COMMAND,
AD7091R_MODE_AUTOCYCLE,
};
struct ad7091r_state {
struct device *dev;
struct regmap *map;
struct gpio_desc *convst_gpio;
struct gpio_desc *reset_gpio;
struct regulator *vref;
const struct ad7091r_chip_info *chip_info;
enum ad7091r_mode mode;
struct mutex lock; /*lock to prevent concurrent reads */
__be16 tx_buf __aligned(IIO_DMA_MINALIGN);
__be16 rx_buf;
};
struct ad7091r_chip_info {
const char *name;
unsigned int num_channels;
const struct iio_chan_spec *channels;
unsigned int vref_mV;
unsigned int (*reg_result_chan_id)(unsigned int val);
int (*set_mode)(struct ad7091r_state *st, enum ad7091r_mode mode);
};
struct ad7091r_init_info {
const struct ad7091r_chip_info *info_irq;
const struct ad7091r_chip_info *info_no_irq;
const struct regmap_config *regmap_config;
void (*init_adc_regmap)(struct ad7091r_state *st,
const struct regmap_config *regmap_conf);
int (*setup)(struct ad7091r_state *st);
};
extern const struct iio_event_spec ad7091r_events[3];
int ad7091r_probe(struct device *dev, const struct ad7091r_init_info *init_info,
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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