LXR linux/drivers/iio/imu/inv_icm42600/inv_icm42600

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Copyright (C) 2020 InvenSense, Inc.
   4 */
   5
   6#include <linux/kernel.h>
   7#include <linux/device.h>
   8#include <linux/module.h>
   9#include <linux/mod_devicetable.h>
  10#include <linux/spi/spi.h>
  11#include <linux/regmap.h>
  12#include <linux/property.h>
  13
  14#include "inv_icm42600.h"
  15
  16static int inv_icm42600_spi_bus_setup(struct inv_icm42600_state *st)
  17{
  18        unsigned int mask, val;
  19        int ret;
  20
  21        /* setup interface registers */
  22        val = INV_ICM42600_INTF_CONFIG6_I3C_EN |
  23              INV_ICM42600_INTF_CONFIG6_I3C_SDR_EN |
  24              INV_ICM42600_INTF_CONFIG6_I3C_DDR_EN;
  25        ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG6,
  26                                 INV_ICM42600_INTF_CONFIG6_MASK, val);
  27        if (ret)
  28                return ret;
  29
  30        ret = regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG4,
  31                                 INV_ICM42600_INTF_CONFIG4_I3C_BUS_ONLY, 0);
  32        if (ret)
  33                return ret;
  34
  35        /* set slew rates for I2C and SPI */
  36        mask = INV_ICM42600_DRIVE_CONFIG_I2C_MASK |
  37               INV_ICM42600_DRIVE_CONFIG_SPI_MASK;
  38        val = INV_ICM42600_DRIVE_CONFIG_I2C(INV_ICM42600_SLEW_RATE_20_60NS) |
  39              INV_ICM42600_DRIVE_CONFIG_SPI(INV_ICM42600_SLEW_RATE_INF_2NS);
  40        ret = regmap_update_bits(st->map, INV_ICM42600_REG_DRIVE_CONFIG,
  41                                 mask, val);
  42        if (ret)
  43                return ret;
  44
  45        /* disable i2c bus */
  46        return regmap_update_bits(st->map, INV_ICM42600_REG_INTF_CONFIG0,
  47                                  INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_MASK,
  48                                  INV_ICM42600_INTF_CONFIG0_UI_SIFS_CFG_I2C_DIS);
  49}
  50
  51static int inv_icm42600_probe(struct spi_device *spi)
  52{
  53        const void *match;
  54        enum inv_icm42600_chip chip;
  55        struct regmap *regmap;
  56
  57        match = device_get_match_data(&spi->dev);
  58        if (!match)
  59                return -EINVAL;
  60        chip = (enum inv_icm42600_chip)match;
  61
  62        regmap = devm_regmap_init_spi(spi, &inv_icm42600_regmap_config);
  63        if (IS_ERR(regmap))
  64                return PTR_ERR(regmap);
  65
  66        return inv_icm42600_core_probe(regmap, chip, spi->irq,
  67                                       inv_icm42600_spi_bus_setup);
  68}
  69
  70static const struct of_device_id inv_icm42600_of_matches[] = {
  71        {
  72                .compatible = "invensense,icm42600",
  73                .data = (void *)INV_CHIP_ICM42600,
  74        }, {
  75                .compatible = "invensense,icm42602",
  76                .data = (void *)INV_CHIP_ICM42602,
  77        }, {
  78                .compatible = "invensense,icm42605",
  79                .data = (void *)INV_CHIP_ICM42605,
  80        }, {
  81                .compatible = "invensense,icm42622",
  82                .data = (void *)INV_CHIP_ICM42622,
  83        },
  84        {}
  85};
  86MODULE_DEVICE_TABLE(of, inv_icm42600_of_matches);
  87
  88static struct spi_driver inv_icm42600_driver = {
  89        .driver = {
  90                .name = "inv-icm42600-spi",
  91                .of_match_table = inv_icm42600_of_matches,
  92                .pm = &inv_icm42600_pm_ops,
  93        },
  94        .probe = inv_icm42600_probe,
  95};
  96module_spi_driver(inv_icm42600_driver);
  97
  98MODULE_AUTHOR("InvenSense, Inc.");
  99MODULE_DESCRIPTION("InvenSense ICM-426xx SPI driver");
 100MODULE_LICENSE("GPL");
 101