Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Jagath Jog J | 352 | 100.00% | 2 | 100.00% |
Total | 352 | 2 |
// SPDX-License-Identifier: GPL-2.0 /* * SPI driver for Bosch BMI323 6-Axis IMU. * * Copyright (C) 2023, Jagath Jog J <jagathjog1996@gmail.com> */ #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/regmap.h> #include <linux/spi/spi.h> #include "bmi323.h" /* * From BMI323 datasheet section 4: Notes on the Serial Interface Support. * Each SPI register read operation requires to read one dummy byte before * the actual payload. */ static int bmi323_regmap_spi_read(void *context, const void *reg_buf, size_t reg_size, void *val_buf, size_t val_size) { struct spi_device *spi = context; return spi_write_then_read(spi, reg_buf, reg_size, val_buf, val_size); } static int bmi323_regmap_spi_write(void *context, const void *data, size_t count) { struct spi_device *spi = context; u8 *data_buff = (u8 *)data; data_buff[1] = data_buff[0]; return spi_write(spi, data_buff + 1, count - 1); } static struct regmap_bus bmi323_regmap_bus = { .read = bmi323_regmap_spi_read, .write = bmi323_regmap_spi_write, }; static const struct regmap_config bmi323_spi_regmap_config = { .reg_bits = 8, .val_bits = 16, .pad_bits = 8, .read_flag_mask = BIT(7), .max_register = BMI323_CFG_RES_REG, .val_format_endian = REGMAP_ENDIAN_LITTLE, }; static int bmi323_spi_probe(struct spi_device *spi) { struct device *dev = &spi->dev; struct regmap *regmap; regmap = devm_regmap_init(dev, &bmi323_regmap_bus, dev, &bmi323_spi_regmap_config); if (IS_ERR(regmap)) return dev_err_probe(dev, PTR_ERR(regmap), "Failed to initialize SPI Regmap\n"); return bmi323_core_probe(dev); } static const struct spi_device_id bmi323_spi_ids[] = { { "bmi323" }, { } }; MODULE_DEVICE_TABLE(spi, bmi323_spi_ids); static const struct of_device_id bmi323_of_spi_match[] = { { .compatible = "bosch,bmi323" }, { } }; MODULE_DEVICE_TABLE(of, bmi323_of_spi_match); static struct spi_driver bmi323_spi_driver = { .driver = { .name = "bmi323", .of_match_table = bmi323_of_spi_match, }, .probe = bmi323_spi_probe, .id_table = bmi323_spi_ids, }; module_spi_driver(bmi323_spi_driver); MODULE_DESCRIPTION("Bosch BMI323 IMU driver"); MODULE_AUTHOR("Jagath Jog J <jagathjog1996@gmail.com>"); MODULE_LICENSE("GPL"); MODULE_IMPORT_NS(IIO_BMI323);
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