0c8f492dd7
The mpu9250 is a SIP containing an mpu6500 and an ak8975. If this was all there was too it there would be no need for explicit handling in the driver. Arguably the bindings would also only reflect the presence of an mpu6500 with the ak8975 hanging off it, as the kernel doesn't care that they are in one package. However, the WHOAMI value changes as well so best to add explicit support. Signed-off-by: Jonathan Cameron <jic23@kernel.org>
114 lines
2.9 KiB
C
114 lines
2.9 KiB
C
/*
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* Copyright (C) 2015 Intel Corporation Inc.
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/acpi.h>
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#include <linux/spi/spi.h>
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#include <linux/regmap.h>
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#include <linux/iio/iio.h>
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#include "inv_mpu_iio.h"
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static const struct regmap_config inv_mpu_regmap_config = {
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.reg_bits = 8,
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.val_bits = 8,
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};
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static int inv_mpu_i2c_disable(struct iio_dev *indio_dev)
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{
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struct inv_mpu6050_state *st = iio_priv(indio_dev);
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int ret = 0;
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ret = inv_mpu6050_set_power_itg(st, true);
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if (ret)
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return ret;
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ret = regmap_write(st->map, INV_MPU6050_REG_USER_CTRL,
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INV_MPU6050_BIT_I2C_IF_DIS);
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if (ret) {
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inv_mpu6050_set_power_itg(st, false);
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return ret;
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}
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return inv_mpu6050_set_power_itg(st, false);
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}
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static int inv_mpu_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 *spi_id;
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const struct acpi_device_id *acpi_id;
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const char *name = NULL;
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enum inv_devices chip_type;
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if ((spi_id = spi_get_device_id(spi))) {
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chip_type = (enum inv_devices)spi_id->driver_data;
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name = spi_id->name;
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} else if ((acpi_id = acpi_match_device(spi->dev.driver->acpi_match_table, &spi->dev))) {
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chip_type = (enum inv_devices)acpi_id->driver_data;
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} else {
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return -ENODEV;
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}
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regmap = devm_regmap_init_spi(spi, &inv_mpu_regmap_config);
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if (IS_ERR(regmap)) {
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dev_err(&spi->dev, "Failed to register spi regmap %d\n",
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(int)PTR_ERR(regmap));
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return PTR_ERR(regmap);
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}
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return inv_mpu_core_probe(regmap, spi->irq, name,
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inv_mpu_i2c_disable, chip_type);
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}
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static int inv_mpu_remove(struct spi_device *spi)
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{
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return inv_mpu_core_remove(&spi->dev);
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}
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/*
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* device id table is used to identify what device can be
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* supported by this driver
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*/
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static const struct spi_device_id inv_mpu_id[] = {
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{"mpu6000", INV_MPU6000},
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{"mpu6500", INV_MPU6500},
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{"mpu9150", INV_MPU9150},
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{"mpu9250", INV_MPU9250},
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{"icm20608", INV_ICM20608},
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{}
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};
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MODULE_DEVICE_TABLE(spi, inv_mpu_id);
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static const struct acpi_device_id inv_acpi_match[] = {
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{"INVN6000", INV_MPU6000},
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{ },
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};
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MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
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static struct spi_driver inv_mpu_driver = {
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.probe = inv_mpu_probe,
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.remove = inv_mpu_remove,
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.id_table = inv_mpu_id,
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.driver = {
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.acpi_match_table = ACPI_PTR(inv_acpi_match),
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.name = "inv-mpu6000-spi",
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.pm = &inv_mpu_pmops,
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},
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};
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module_spi_driver(inv_mpu_driver);
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MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
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MODULE_DESCRIPTION("Invensense device MPU6000 driver");
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MODULE_LICENSE("GPL");
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