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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * SPI driver for hmc59834 *5 * Copyright (C) Josef Gajdusek <atx@atx.name>6 */7 8#include <linux/module.h>9#include <linux/spi/spi.h>10#include <linux/iio/iio.h>11 12#include "hmc5843.h"13 14static const struct regmap_range hmc5843_readable_ranges[] = {15 regmap_reg_range(0, HMC5843_ID_END),16};17 18static const struct regmap_access_table hmc5843_readable_table = {19 .yes_ranges = hmc5843_readable_ranges,20 .n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges),21};22 23static const struct regmap_range hmc5843_writable_ranges[] = {24 regmap_reg_range(0, HMC5843_MODE_REG),25};26 27static const struct regmap_access_table hmc5843_writable_table = {28 .yes_ranges = hmc5843_writable_ranges,29 .n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges),30};31 32static const struct regmap_range hmc5843_volatile_ranges[] = {33 regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG),34};35 36static const struct regmap_access_table hmc5843_volatile_table = {37 .yes_ranges = hmc5843_volatile_ranges,38 .n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges),39};40 41static const struct regmap_config hmc5843_spi_regmap_config = {42 .reg_bits = 8,43 .val_bits = 8,44 45 .rd_table = &hmc5843_readable_table,46 .wr_table = &hmc5843_writable_table,47 .volatile_table = &hmc5843_volatile_table,48 49 /* Autoincrement address pointer */50 .read_flag_mask = 0xc0,51 52 .cache_type = REGCACHE_RBTREE,53};54 55static int hmc5843_spi_probe(struct spi_device *spi)56{57 int ret;58 struct regmap *regmap;59 const struct spi_device_id *id = spi_get_device_id(spi);60 61 spi->mode = SPI_MODE_3;62 spi->max_speed_hz = 8000000;63 spi->bits_per_word = 8;64 ret = spi_setup(spi);65 if (ret)66 return ret;67 68 regmap = devm_regmap_init_spi(spi, &hmc5843_spi_regmap_config);69 if (IS_ERR(regmap))70 return PTR_ERR(regmap);71 72 return hmc5843_common_probe(&spi->dev,73 regmap,74 id->driver_data, id->name);75}76 77static void hmc5843_spi_remove(struct spi_device *spi)78{79 hmc5843_common_remove(&spi->dev);80}81 82static const struct spi_device_id hmc5843_id[] = {83 { "hmc5983", HMC5983_ID },84 { }85};86MODULE_DEVICE_TABLE(spi, hmc5843_id);87 88static struct spi_driver hmc5843_driver = {89 .driver = {90 .name = "hmc5843",91 .pm = pm_sleep_ptr(&hmc5843_pm_ops),92 },93 .id_table = hmc5843_id,94 .probe = hmc5843_spi_probe,95 .remove = hmc5843_spi_remove,96};97 98module_spi_driver(hmc5843_driver);99 100MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");101MODULE_DESCRIPTION("HMC5983 SPI driver");102MODULE_LICENSE("GPL");103MODULE_IMPORT_NS(IIO_HMC5843);104