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85 lines
2.0 KiB
85 lines
2.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* 3-axis accelerometer driver supporting following Bosch-Sensortec chips: |
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* - BMI088 |
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* |
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* Copyright (c) 2018-2020, Topic Embedded Products |
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*/ |
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#include <linux/module.h> |
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#include <linux/regmap.h> |
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#include <linux/slab.h> |
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#include <linux/spi/spi.h> |
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#include "bmi088-accel.h" |
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static int bmi088_regmap_spi_write(void *context, const void *data, size_t count) |
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{ |
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struct spi_device *spi = context; |
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/* Write register is same as generic SPI */ |
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return spi_write(spi, data, count); |
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} |
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static int bmi088_regmap_spi_read(void *context, const void *reg, |
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size_t reg_size, void *val, size_t val_size) |
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{ |
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struct spi_device *spi = context; |
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u8 addr[2]; |
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addr[0] = *(u8 *)reg; |
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addr[0] |= BIT(7); /* Set RW = '1' */ |
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addr[1] = 0; /* Read requires a dummy byte transfer */ |
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return spi_write_then_read(spi, addr, sizeof(addr), val, val_size); |
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} |
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static struct regmap_bus bmi088_regmap_bus = { |
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.write = bmi088_regmap_spi_write, |
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.read = bmi088_regmap_spi_read, |
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}; |
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static int bmi088_accel_probe(struct spi_device *spi) |
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{ |
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struct regmap *regmap; |
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const struct spi_device_id *id = spi_get_device_id(spi); |
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regmap = devm_regmap_init(&spi->dev, &bmi088_regmap_bus, |
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spi, &bmi088_regmap_conf); |
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if (IS_ERR(regmap)) { |
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dev_err(&spi->dev, "Failed to initialize spi regmap\n"); |
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return PTR_ERR(regmap); |
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} |
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return bmi088_accel_core_probe(&spi->dev, regmap, spi->irq, id->name, |
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true); |
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} |
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static int bmi088_accel_remove(struct spi_device *spi) |
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{ |
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bmi088_accel_core_remove(&spi->dev); |
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return 0; |
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} |
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static const struct spi_device_id bmi088_accel_id[] = { |
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{"bmi088-accel", }, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(spi, bmi088_accel_id); |
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static struct spi_driver bmi088_accel_driver = { |
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.driver = { |
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.name = "bmi088_accel_spi", |
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.pm = &bmi088_accel_pm_ops, |
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}, |
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.probe = bmi088_accel_probe, |
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.remove = bmi088_accel_remove, |
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.id_table = bmi088_accel_id, |
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}; |
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module_spi_driver(bmi088_accel_driver); |
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MODULE_AUTHOR("Niek van Agt <[email protected]>"); |
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MODULE_LICENSE("GPL v2"); |
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MODULE_DESCRIPTION("BMI088 accelerometer driver (SPI)");
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