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536cc27dea
devm_regmap_init_i2c may fail and return NULL. The fix returns the error when it fails. Signed-off-by: Kangjie Lu <kjlu@umn.edu> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
/*
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* SPI driver for hmc5983
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*
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* Copyright (C) Josef Gajdusek <atx@atx.name>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include <linux/iio/iio.h>
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#include "hmc5843.h"
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static const struct regmap_range hmc5843_readable_ranges[] = {
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regmap_reg_range(0, HMC5843_ID_END),
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};
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static const struct regmap_access_table hmc5843_readable_table = {
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.yes_ranges = hmc5843_readable_ranges,
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.n_yes_ranges = ARRAY_SIZE(hmc5843_readable_ranges),
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};
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static const struct regmap_range hmc5843_writable_ranges[] = {
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regmap_reg_range(0, HMC5843_MODE_REG),
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};
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static const struct regmap_access_table hmc5843_writable_table = {
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.yes_ranges = hmc5843_writable_ranges,
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.n_yes_ranges = ARRAY_SIZE(hmc5843_writable_ranges),
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};
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static const struct regmap_range hmc5843_volatile_ranges[] = {
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regmap_reg_range(HMC5843_DATA_OUT_MSB_REGS, HMC5843_STATUS_REG),
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};
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static const struct regmap_access_table hmc5843_volatile_table = {
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.yes_ranges = hmc5843_volatile_ranges,
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.n_yes_ranges = ARRAY_SIZE(hmc5843_volatile_ranges),
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};
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static const struct regmap_config hmc5843_spi_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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.rd_table = &hmc5843_readable_table,
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.wr_table = &hmc5843_writable_table,
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.volatile_table = &hmc5843_volatile_table,
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/* Autoincrement address pointer */
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.read_flag_mask = 0xc0,
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.cache_type = REGCACHE_RBTREE,
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};
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static int hmc5843_spi_probe(struct spi_device *spi)
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{
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int ret;
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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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spi->mode = SPI_MODE_3;
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spi->max_speed_hz = 8000000;
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spi->bits_per_word = 8;
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ret = spi_setup(spi);
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if (ret)
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return ret;
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regmap = devm_regmap_init_spi(spi, &hmc5843_spi_regmap_config);
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if (IS_ERR(regmap))
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return PTR_ERR(regmap);
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return hmc5843_common_probe(&spi->dev,
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regmap,
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id->driver_data, id->name);
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}
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static int hmc5843_spi_remove(struct spi_device *spi)
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{
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return hmc5843_common_remove(&spi->dev);
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}
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static const struct spi_device_id hmc5843_id[] = {
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{ "hmc5983", HMC5983_ID },
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{ }
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};
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MODULE_DEVICE_TABLE(spi, hmc5843_id);
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static struct spi_driver hmc5843_driver = {
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.driver = {
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.name = "hmc5843",
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.pm = HMC5843_PM_OPS,
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},
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.id_table = hmc5843_id,
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.probe = hmc5843_spi_probe,
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.remove = hmc5843_spi_remove,
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};
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module_spi_driver(hmc5843_driver);
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MODULE_AUTHOR("Josef Gajdusek <atx@atx.name>");
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MODULE_DESCRIPTION("HMC5983 SPI driver");
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MODULE_LICENSE("GPL");
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