diff options
Diffstat (limited to 'drivers/iio/adc/ad7091r-base.h')
| -rw-r--r-- | drivers/iio/adc/ad7091r-base.h | 83 |
1 files changed, 78 insertions, 5 deletions
diff --git a/drivers/iio/adc/ad7091r-base.h b/drivers/iio/adc/ad7091r-base.h index 509748aef9b1..696bf7a897bb 100644 --- a/drivers/iio/adc/ad7091r-base.h +++ b/drivers/iio/adc/ad7091r-base.h @@ -8,19 +8,92 @@ #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 ad7091r_state; +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 concurent 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); }; -extern const struct regmap_config ad7091r_regmap_config; +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); -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__ */ |