// SPDX-License-Identifier: GPL-2.0-only /* * Murata SCA3300 3-axis industrial accelerometer * * Copyright (c) 2021 Vaisala Oyj. All rights reserved. */ #include <linux/bitops.h> #include <linux/crc8.h> #include <linux/delay.h> #include <linux/kernel.h> #include <linux/module.h> #include <linux/spi/spi.h> #include <asm/unaligned.h> #include <linux/iio/buffer.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> #include <linux/iio/trigger_consumer.h> #include <linux/iio/triggered_buffer.h> #define SCA3300_ALIAS … #define SCA3300_CRC8_POLYNOMIAL … /* Device mode register */ #define SCA3300_REG_MODE … #define SCA3300_MODE_SW_RESET … /* Last register in map */ #define SCA3300_REG_SELBANK … /* Device status and mask */ #define SCA3300_REG_STATUS … #define SCA3300_STATUS_MASK … /* Device ID */ #define SCA3300_REG_WHOAMI … #define SCA3300_WHOAMI_ID … #define SCL3300_WHOAMI_ID … /* Device return status and mask */ #define SCA3300_VALUE_RS_ERROR … #define SCA3300_MASK_RS_STATUS … #define SCL3300_REG_ANG_CTRL … #define SCL3300_ANG_ENABLE … enum sca3300_scan_indexes { … }; /* * Buffer size max case: * Three accel channels, two bytes per channel. * Temperature channel, two bytes. * Three incli channels, two bytes per channel. * Timestamp channel, eight bytes. */ #define SCA3300_MAX_BUFFER_SIZE … #define SCA3300_ACCEL_CHANNEL(index, reg, axis) … #define SCA3300_INCLI_CHANNEL(index, reg, axis) … #define SCA3300_TEMP_CHANNEL(index, reg) … static const struct iio_chan_spec sca3300_channels[] = …; static const int sca3300_lp_freq[] = …; static const int sca3300_lp_freq_map[] = …; static const int scl3300_lp_freq[] = …; static const int scl3300_lp_freq_map[] = …; static const int sca3300_accel_scale[][2] = …; static const int sca3300_accel_scale_map[] = …; static const int scl3300_accel_scale[][2] = …; static const int scl3300_accel_scale_map[] = …; static const int scl3300_incli_scale[][2] = …; static const int scl3300_incli_scale_map[] = …; static const int sca3300_avail_modes_map[] = …; static const int scl3300_avail_modes_map[] = …; static const struct iio_chan_spec scl3300_channels[] = …; static const unsigned long sca3300_scan_masks[] = …; static const unsigned long scl3300_scan_masks[] = …; struct sca3300_chip_info { … }; /** * struct sca3300_data - device data * @spi: SPI device structure * @lock: Data buffer lock * @chip: Sensor chip specific information * @buffer: Triggered buffer: * -SCA3300: 4 channel 16-bit data + 64-bit timestamp * -SCL3300: 7 channel 16-bit data + 64-bit timestamp * @txbuf: Transmit buffer * @rxbuf: Receive buffer */ struct sca3300_data { … }; static const struct sca3300_chip_info sca3300_chip_tbl[] = …; DECLARE_CRC8_TABLE(sca3300_crc_table); static int sca3300_transfer(struct sca3300_data *sca_data, int *val) { … } static int sca3300_error_handler(struct sca3300_data *sca_data) { … } static int sca3300_read_reg(struct sca3300_data *sca_data, u8 reg, int *val) { … } static int sca3300_write_reg(struct sca3300_data *sca_data, u8 reg, int val) { … } static int sca3300_set_op_mode(struct sca3300_data *sca_data, int index) { … } static int sca3300_get_op_mode(struct sca3300_data *sca_data, int *index) { … } static int sca3300_set_frequency(struct sca3300_data *data, int val) { … } static int sca3300_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { … } static int sca3300_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { … } static irqreturn_t sca3300_trigger_handler(int irq, void *p) { … } /* * sca3300_init - Device init sequence. See datasheet rev 2 section * 4.2 Start-Up Sequence for details. */ static int sca3300_init(struct sca3300_data *sca_data, struct iio_dev *indio_dev) { … } static int sca3300_debugfs_reg_access(struct iio_dev *indio_dev, unsigned int reg, unsigned int writeval, unsigned int *readval) { … } static int sca3300_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { … } static const struct iio_info sca3300_info = …; static int sca3300_probe(struct spi_device *spi) { … } static const struct of_device_id sca3300_dt_ids[] = …; MODULE_DEVICE_TABLE(of, sca3300_dt_ids); static const struct spi_device_id sca3300_ids[] = …; MODULE_DEVICE_TABLE(spi, sca3300_ids); static struct spi_driver sca3300_driver = …; module_spi_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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