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1/* SPDX-License-Identifier: GPL-2.0 */2/*3 * AD7091RX Analog to Digital converter driver4 *5 * Copyright 2014-2019 Analog Devices Inc.6 */7 8#ifndef __DRIVERS_IIO_ADC_AD7091R_BASE_H__9#define __DRIVERS_IIO_ADC_AD7091R_BASE_H__10 11#include <linux/regmap.h>12 13#define AD7091R_REG_RESULT 014#define AD7091R_REG_CHANNEL 115#define AD7091R_REG_CONF 216#define AD7091R_REG_ALERT 317#define AD7091R_REG_CH_LOW_LIMIT(ch) ((ch) * 3 + 4)18#define AD7091R_REG_CH_HIGH_LIMIT(ch) ((ch) * 3 + 5)19#define AD7091R_REG_CH_HYSTERESIS(ch) ((ch) * 3 + 6)20 21/* AD7091R_REG_RESULT */22#define AD7091R5_REG_RESULT_CH_ID(x) (((x) >> 13) & 0x3)23#define AD7091R8_REG_RESULT_CH_ID(x) (((x) >> 13) & 0x7)24#define AD7091R_REG_RESULT_CONV_RESULT(x) ((x) & 0xfff)25 26/* AD7091R_REG_CONF */27#define AD7091R_REG_CONF_INT_VREF BIT(0)28#define AD7091R_REG_CONF_ALERT_EN BIT(4)29#define AD7091R_REG_CONF_AUTO BIT(8)30#define AD7091R_REG_CONF_CMD BIT(10)31 32#define AD7091R_REG_CONF_MODE_MASK \33 (AD7091R_REG_CONF_AUTO | AD7091R_REG_CONF_CMD)34 35/* AD7091R_REG_CH_LIMIT */36#define AD7091R_HIGH_LIMIT 0xFFF37#define AD7091R_LOW_LIMIT 0x038 39#define AD7091R_CHANNEL(idx, bits, ev, num_ev) { \40 .type = IIO_VOLTAGE, \41 .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \42 .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \43 .indexed = 1, \44 .channel = idx, \45 .event_spec = ev, \46 .num_event_specs = num_ev, \47 .scan_type.storagebits = 16, \48 .scan_type.realbits = bits, \49}50 51struct device;52struct gpio_desc;53 54enum ad7091r_mode {55 AD7091R_MODE_SAMPLE,56 AD7091R_MODE_COMMAND,57 AD7091R_MODE_AUTOCYCLE,58};59 60struct ad7091r_state {61 struct device *dev;62 struct regmap *map;63 struct gpio_desc *convst_gpio;64 struct gpio_desc *reset_gpio;65 struct regulator *vref;66 const struct ad7091r_chip_info *chip_info;67 enum ad7091r_mode mode;68 struct mutex lock; /*lock to prevent concurent reads */69 __be16 tx_buf __aligned(IIO_DMA_MINALIGN);70 __be16 rx_buf;71};72 73struct ad7091r_chip_info {74 const char *name;75 unsigned int num_channels;76 const struct iio_chan_spec *channels;77 unsigned int vref_mV;78 unsigned int (*reg_result_chan_id)(unsigned int val);79 int (*set_mode)(struct ad7091r_state *st, enum ad7091r_mode mode);80};81 82struct ad7091r_init_info {83 const struct ad7091r_chip_info *info_irq;84 const struct ad7091r_chip_info *info_no_irq;85 const struct regmap_config *regmap_config;86 void (*init_adc_regmap)(struct ad7091r_state *st,87 const struct regmap_config *regmap_conf);88 int (*setup)(struct ad7091r_state *st);89};90 91extern const struct iio_event_spec ad7091r_events[3];92 93int ad7091r_probe(struct device *dev, const struct ad7091r_init_info *init_info,94 int irq);95 96bool ad7091r_volatile_reg(struct device *dev, unsigned int reg);97bool ad7091r_writeable_reg(struct device *dev, unsigned int reg);98 99#endif /* __DRIVERS_IIO_ADC_AD7091R_BASE_H__ */100