Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Cosmin Tanislav | 727 | 99.18% | 1 | 50.00% |
Jonathan Cameron | 6 | 0.82% | 1 | 50.00% |
Total | 733 | 2 |
// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2021 Analog Devices, Inc. * Author: Cosmin Tanislav <cosmin.tanislav@analog.com> */ #include <linux/mod_devicetable.h> #include <linux/module.h> #include <linux/regmap.h> #include <linux/spi/spi.h> #include <linux/iio/iio.h> #include "adxl367.h" #define ADXL367_SPI_WRITE_COMMAND 0x0A #define ADXL367_SPI_READ_COMMAND 0x0B #define ADXL367_SPI_FIFO_COMMAND 0x0D struct adxl367_spi_state { struct spi_device *spi; struct spi_message reg_write_msg; struct spi_transfer reg_write_xfer[2]; struct spi_message reg_read_msg; struct spi_transfer reg_read_xfer[2]; struct spi_message fifo_msg; struct spi_transfer fifo_xfer[2]; /* * DMA (thus cache coherency maintenance) may require the * transfer buffers live in their own cache lines. */ u8 reg_write_tx_buf[1] __aligned(IIO_DMA_MINALIGN); u8 reg_read_tx_buf[2]; u8 fifo_tx_buf[1]; }; static int adxl367_read_fifo(void *context, __be16 *fifo_buf, unsigned int fifo_entries) { struct adxl367_spi_state *st = context; st->fifo_xfer[1].rx_buf = fifo_buf; st->fifo_xfer[1].len = fifo_entries * sizeof(*fifo_buf); return spi_sync(st->spi, &st->fifo_msg); } static int adxl367_read(void *context, const void *reg_buf, size_t reg_size, void *val_buf, size_t val_size) { struct adxl367_spi_state *st = context; u8 reg = ((const u8 *)reg_buf)[0]; st->reg_read_tx_buf[1] = reg; st->reg_read_xfer[1].rx_buf = val_buf; st->reg_read_xfer[1].len = val_size; return spi_sync(st->spi, &st->reg_read_msg); } static int adxl367_write(void *context, const void *val_buf, size_t val_size) { struct adxl367_spi_state *st = context; st->reg_write_xfer[1].tx_buf = val_buf; st->reg_write_xfer[1].len = val_size; return spi_sync(st->spi, &st->reg_write_msg); } static struct regmap_bus adxl367_spi_regmap_bus = { .read = adxl367_read, .write = adxl367_write, }; static const struct regmap_config adxl367_spi_regmap_config = { .reg_bits = 8, .val_bits = 8, }; static const struct adxl367_ops adxl367_spi_ops = { .read_fifo = adxl367_read_fifo, }; static int adxl367_spi_probe(struct spi_device *spi) { struct adxl367_spi_state *st; struct regmap *regmap; st = devm_kzalloc(&spi->dev, sizeof(*st), GFP_KERNEL); if (!st) return -ENOMEM; st->spi = spi; /* * Xfer: [XFR1] [ XFR2 ] * Master: 0x0A ADDR DATA0 DATA1 ... DATAN * Slave: .... .......................... */ st->reg_write_tx_buf[0] = ADXL367_SPI_WRITE_COMMAND; st->reg_write_xfer[0].tx_buf = st->reg_write_tx_buf; st->reg_write_xfer[0].len = sizeof(st->reg_write_tx_buf); spi_message_init_with_transfers(&st->reg_write_msg, st->reg_write_xfer, 2); /* * Xfer: [ XFR1 ] [ XFR2 ] * Master: 0x0B ADDR ..................... * Slave: ......... DATA0 DATA1 ... DATAN */ st->reg_read_tx_buf[0] = ADXL367_SPI_READ_COMMAND; st->reg_read_xfer[0].tx_buf = st->reg_read_tx_buf; st->reg_read_xfer[0].len = sizeof(st->reg_read_tx_buf); spi_message_init_with_transfers(&st->reg_read_msg, st->reg_read_xfer, 2); /* * Xfer: [XFR1] [ XFR2 ] * Master: 0x0D ..................... * Slave: .... DATA0 DATA1 ... DATAN */ st->fifo_tx_buf[0] = ADXL367_SPI_FIFO_COMMAND; st->fifo_xfer[0].tx_buf = st->fifo_tx_buf; st->fifo_xfer[0].len = sizeof(st->fifo_tx_buf); spi_message_init_with_transfers(&st->fifo_msg, st->fifo_xfer, 2); regmap = devm_regmap_init(&spi->dev, &adxl367_spi_regmap_bus, st, &adxl367_spi_regmap_config); if (IS_ERR(regmap)) return PTR_ERR(regmap); return adxl367_probe(&spi->dev, &adxl367_spi_ops, st, regmap, spi->irq); } static const struct spi_device_id adxl367_spi_id[] = { { "adxl367", 0 }, { }, }; MODULE_DEVICE_TABLE(spi, adxl367_spi_id); static const struct of_device_id adxl367_of_match[] = { { .compatible = "adi,adxl367" }, { }, }; MODULE_DEVICE_TABLE(of, adxl367_of_match); static struct spi_driver adxl367_spi_driver = { .driver = { .name = "adxl367_spi", .of_match_table = adxl367_of_match, }, .probe = adxl367_spi_probe, .id_table = adxl367_spi_id, }; module_spi_driver(adxl367_spi_driver); MODULE_IMPORT_NS(IIO_ADXL367); MODULE_AUTHOR("Cosmin Tanislav <cosmin.tanislav@analog.com>"); MODULE_DESCRIPTION("Analog Devices ADXL367 3-axis accelerometer SPI driver"); MODULE_LICENSE("GPL");
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