// SPDX-License-Identifier: GPL-2.0-only /* * BM1390 ROHM pressure sensor * * Copyright (c) 2023, ROHM Semiconductor. * https://fscdn.rohm.com/en/products/databook/datasheet/ic/sensor/pressure/bm1390glv-z-e.pdf */ #include <linux/bitfield.h> #include <linux/bits.h> #include <linux/device.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/regmap.h> #include <linux/regulator/consumer.h> #include <linux/iio/iio.h> #include <linux/iio/trigger.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #define BM1390_REG_MANUFACT_ID … #define BM1390_REG_PART_ID … #define BM1390_REG_POWER … #define BM1390_MASK_POWER … #define BM1390_POWER_ON … #define BM1390_POWER_OFF … #define BM1390_REG_RESET … #define BM1390_MASK_RESET … #define BM1390_RESET_RELEASE … #define BM1390_RESET … #define BM1390_REG_MODE_CTRL … #define BM1390_MASK_MEAS_MODE … #define BM1390_MASK_DRDY_EN … #define BM1390_MASK_WMI_EN … #define BM1390_MASK_AVE_NUM … /* * Data-sheet states that when the IIR is used, the AVE_NUM must be set to * value 110b */ #define BM1390_IIR_AVE_NUM … #define BM1390_REG_FIFO_CTRL … #define BM1390_MASK_IIR_MODE … #define BM1390_IIR_MODE_OFF … #define BM1390_IIR_MODE_WEAK … #define BM1390_IIR_MODE_MID … #define BM1390_IIR_MODE_STRONG … #define BM1390_MASK_FIFO_LEN … #define BM1390_MASK_FIFO_EN … #define BM1390_WMI_MIN … #define BM1390_WMI_MAX … #define BM1390_REG_FIFO_LVL … #define BM1390_MASK_FIFO_LVL … #define BM1390_REG_STATUS … #define BM1390_REG_PRESSURE_BASE … #define BM1390_REG_TEMP_HI … #define BM1390_REG_TEMP_LO … #define BM1390_MAX_REGISTER … #define BM1390_ID … /* Regmap configs */ static const struct regmap_range bm1390_volatile_ranges[] = …; static const struct regmap_access_table bm1390_volatile_regs = …; static const struct regmap_range bm1390_precious_ranges[] = …; static const struct regmap_access_table bm1390_precious_regs = …; static const struct regmap_range bm1390_read_only_ranges[] = …; static const struct regmap_access_table bm1390_ro_regs = …; static const struct regmap_range bm1390_noinc_read_ranges[] = …; static const struct regmap_access_table bm1390_nir_regs = …; static const struct regmap_config bm1390_regmap = …; enum { … }; struct bm1390_data_buf { … }; /* BM1390 has FIFO for 4 pressure samples */ #define BM1390_FIFO_LENGTH … struct bm1390_data { … }; enum { … }; static const struct iio_chan_spec bm1390_channels[] = …; /* * We can't skip reading the pressure because the watermark IRQ is acked * only when the pressure data is read from the FIFO. */ static const unsigned long bm1390_scan_masks[] = …; static int bm1390_read_temp(struct bm1390_data *data, int *temp) { … } static int bm1390_pressure_read(struct bm1390_data *data, u32 *pressure) { … } /* The enum values map directly to register bits */ enum bm1390_meas_mode { … }; static int bm1390_meas_set(struct bm1390_data *data, enum bm1390_meas_mode mode) { … } /* * If the trigger is not used we just wait until the measurement has * completed. The data-sheet says maximum measurement cycle (regardless * the AVE_NUM) is 200 mS so let's just sleep at least that long. If speed * is needed the trigger should be used. */ #define BM1390_MAX_MEAS_TIME_MS … static int bm1390_read_data(struct bm1390_data *data, struct iio_chan_spec const *chan, int *val, int *val2) { … } static int bm1390_read_raw(struct iio_dev *idev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static int __bm1390_fifo_flush(struct iio_dev *idev, unsigned int samples, s64 timestamp) { … } static int bm1390_fifo_flush(struct iio_dev *idev, unsigned int samples) { … } static int bm1390_set_watermark(struct iio_dev *idev, unsigned int val) { … } static const struct iio_info bm1390_noirq_info = …; static const struct iio_info bm1390_info = …; static int bm1390_chip_init(struct bm1390_data *data) { … } static int bm1390_fifo_set_wmi(struct bm1390_data *data) { … } static int bm1390_fifo_enable(struct iio_dev *idev) { … } static int bm1390_fifo_disable(struct iio_dev *idev) { … } static int bm1390_buffer_postenable(struct iio_dev *idev) { … } static int bm1390_buffer_predisable(struct iio_dev *idev) { … } static const struct iio_buffer_setup_ops bm1390_buffer_ops = …; static irqreturn_t bm1390_trigger_handler(int irq, void *p) { … } /* Get timestamps and wake the thread if we need to read data */ static irqreturn_t bm1390_irq_handler(int irq, void *private) { … } static irqreturn_t bm1390_irq_thread_handler(int irq, void *private) { … } static int bm1390_set_drdy_irq(struct bm1390_data *data, bool en) { … } static int bm1390_trigger_set_state(struct iio_trigger *trig, bool state) { … } static const struct iio_trigger_ops bm1390_trigger_ops = …; static int bm1390_setup_buffer(struct bm1390_data *data, struct iio_dev *idev) { … } static int bm1390_setup_trigger(struct bm1390_data *data, struct iio_dev *idev, int irq) { … } static int bm1390_probe(struct i2c_client *i2c) { … } static const struct of_device_id bm1390_of_match[] = …; MODULE_DEVICE_TABLE(of, bm1390_of_match); static const struct i2c_device_id bm1390_id[] = …; MODULE_DEVICE_TABLE(i2c, bm1390_id); static struct i2c_driver bm1390_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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