cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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rm3100-spi.c (1507B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Support for PNI RM3100 3-axis geomagnetic sensor on a spi bus.
      4 *
      5 * Copyright (C) 2018 Song Qiang <songqiang1304521@gmail.com>
      6 */
      7
      8#include <linux/module.h>
      9#include <linux/spi/spi.h>
     10
     11#include "rm3100.h"
     12
     13static const struct regmap_config rm3100_regmap_config = {
     14	.reg_bits = 8,
     15	.val_bits = 8,
     16
     17	.rd_table = &rm3100_readable_table,
     18	.wr_table = &rm3100_writable_table,
     19	.volatile_table = &rm3100_volatile_table,
     20
     21	.read_flag_mask = 0x80,
     22
     23	.cache_type = REGCACHE_RBTREE,
     24};
     25
     26static int rm3100_probe(struct spi_device *spi)
     27{
     28	struct regmap *regmap;
     29	int ret;
     30
     31	/* Actually this device supports both mode 0 and mode 3. */
     32	spi->mode = SPI_MODE_0;
     33	/* Data rates cannot exceed 1Mbits. */
     34	spi->max_speed_hz = 1000000;
     35	spi->bits_per_word = 8;
     36	ret = spi_setup(spi);
     37	if (ret)
     38		return ret;
     39
     40	regmap = devm_regmap_init_spi(spi, &rm3100_regmap_config);
     41	if (IS_ERR(regmap))
     42		return PTR_ERR(regmap);
     43
     44	return rm3100_common_probe(&spi->dev, regmap, spi->irq);
     45}
     46
     47static const struct of_device_id rm3100_dt_match[] = {
     48	{ .compatible = "pni,rm3100", },
     49	{ }
     50};
     51MODULE_DEVICE_TABLE(of, rm3100_dt_match);
     52
     53static struct spi_driver rm3100_driver = {
     54	.driver = {
     55		.name = "rm3100-spi",
     56		.of_match_table = rm3100_dt_match,
     57	},
     58	.probe = rm3100_probe,
     59};
     60module_spi_driver(rm3100_driver);
     61
     62MODULE_AUTHOR("Song Qiang <songqiang1304521@gmail.com>");
     63MODULE_DESCRIPTION("PNI RM3100 3-axis magnetometer spi driver");
     64MODULE_LICENSE("GPL v2");
     65MODULE_IMPORT_NS(IIO_RM3100);