279 lines
6.2 KiB
C
279 lines
6.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2012 Invensense, Inc.
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*/
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/i2c.h>
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#include <linux/iio/iio.h>
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#include <linux/mod_devicetable.h>
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#include <linux/module.h>
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#include <linux/property.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_mpu6050_select_bypass(struct i2c_mux_core *muxc, u32 chan_id)
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{
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return 0;
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}
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static bool inv_mpu_i2c_aux_bus(struct device *dev)
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{
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struct inv_mpu6050_state *st = iio_priv(dev_get_drvdata(dev));
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switch (st->chip_type) {
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case INV_ICM20608:
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case INV_ICM20608D:
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case INV_ICM20609:
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case INV_ICM20689:
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case INV_ICM20602:
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case INV_IAM20680:
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/* no i2c auxiliary bus on the chip */
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return false;
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case INV_MPU9150:
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case INV_MPU9250:
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case INV_MPU9255:
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if (st->magn_disabled)
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return true;
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else
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return false;
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default:
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return true;
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}
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}
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static int inv_mpu_i2c_aux_setup(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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struct device *dev = indio_dev->dev.parent;
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struct fwnode_handle *mux_node;
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int ret;
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/*
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* MPU9xxx magnetometer support requires to disable i2c auxiliary bus.
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* To ensure backward compatibility with existing setups, do not disable
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* i2c auxiliary bus if it used.
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* Check for i2c-gate node in devicetree and set magnetometer disabled.
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* Only MPU6500 is supported by ACPI, no need to check.
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*/
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switch (st->chip_type) {
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case INV_MPU9150:
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case INV_MPU9250:
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case INV_MPU9255:
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mux_node = device_get_named_child_node(dev, "i2c-gate");
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if (mux_node != NULL) {
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st->magn_disabled = true;
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dev_warn(dev, "disable internal use of magnetometer\n");
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}
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fwnode_handle_put(mux_node);
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break;
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default:
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break;
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}
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/* enable i2c bypass when using i2c auxiliary bus */
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if (inv_mpu_i2c_aux_bus(dev)) {
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ret = regmap_write(st->map, st->reg->int_pin_cfg,
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st->irq_mask | INV_MPU6050_BIT_BYPASS_EN);
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if (ret)
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return ret;
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}
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return 0;
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}
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/**
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* inv_mpu_probe() - probe function.
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* @client: i2c client.
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* @id: i2c device id.
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*
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* Returns 0 on success, a negative error code otherwise.
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*/
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static int inv_mpu_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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const void *match;
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struct inv_mpu6050_state *st;
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int result;
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enum inv_devices chip_type;
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struct regmap *regmap;
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const char *name;
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_I2C_BLOCK))
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return -EOPNOTSUPP;
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match = device_get_match_data(&client->dev);
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if (match) {
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chip_type = (uintptr_t)match;
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name = client->name;
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} else if (id) {
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chip_type = (enum inv_devices)
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id->driver_data;
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name = id->name;
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} else {
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return -ENOSYS;
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}
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regmap = devm_regmap_init_i2c(client, &inv_mpu_regmap_config);
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if (IS_ERR(regmap)) {
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dev_err(&client->dev, "Failed to register i2c regmap: %pe\n",
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regmap);
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return PTR_ERR(regmap);
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}
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result = inv_mpu_core_probe(regmap, client->irq, name,
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inv_mpu_i2c_aux_setup, chip_type);
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if (result < 0)
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return result;
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st = iio_priv(dev_get_drvdata(&client->dev));
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if (inv_mpu_i2c_aux_bus(&client->dev)) {
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/* declare i2c auxiliary bus */
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st->muxc = i2c_mux_alloc(client->adapter, &client->dev,
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1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE,
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inv_mpu6050_select_bypass, NULL);
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if (!st->muxc)
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return -ENOMEM;
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st->muxc->priv = dev_get_drvdata(&client->dev);
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result = i2c_mux_add_adapter(st->muxc, 0, 0, 0);
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if (result)
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return result;
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result = inv_mpu_acpi_create_mux_client(client);
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if (result)
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goto out_del_mux;
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}
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return 0;
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out_del_mux:
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i2c_mux_del_adapters(st->muxc);
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return result;
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}
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static void inv_mpu_remove(struct i2c_client *client)
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{
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struct iio_dev *indio_dev = i2c_get_clientdata(client);
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struct inv_mpu6050_state *st = iio_priv(indio_dev);
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if (st->muxc) {
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inv_mpu_acpi_delete_mux_client(client);
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i2c_mux_del_adapters(st->muxc);
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}
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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 i2c_device_id inv_mpu_id[] = {
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{"mpu6050", INV_MPU6050},
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{"mpu6500", INV_MPU6500},
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{"mpu6515", INV_MPU6515},
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{"mpu6880", INV_MPU6880},
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{"mpu9150", INV_MPU9150},
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{"mpu9250", INV_MPU9250},
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{"mpu9255", INV_MPU9255},
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{"icm20608", INV_ICM20608},
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{"icm20608d", INV_ICM20608D},
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{"icm20609", INV_ICM20609},
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{"icm20689", INV_ICM20689},
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{"icm20602", INV_ICM20602},
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{"icm20690", INV_ICM20690},
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{"iam20680", INV_IAM20680},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, inv_mpu_id);
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static const struct of_device_id inv_of_match[] = {
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{
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.compatible = "invensense,mpu6050",
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.data = (void *)INV_MPU6050
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},
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{
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.compatible = "invensense,mpu6500",
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.data = (void *)INV_MPU6500
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},
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{
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.compatible = "invensense,mpu6515",
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.data = (void *)INV_MPU6515
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},
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{
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.compatible = "invensense,mpu6880",
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.data = (void *)INV_MPU6880
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},
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{
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.compatible = "invensense,mpu9150",
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.data = (void *)INV_MPU9150
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},
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{
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.compatible = "invensense,mpu9250",
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.data = (void *)INV_MPU9250
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},
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{
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.compatible = "invensense,mpu9255",
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.data = (void *)INV_MPU9255
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},
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{
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.compatible = "invensense,icm20608",
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.data = (void *)INV_ICM20608
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},
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{
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.compatible = "invensense,icm20608d",
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.data = (void *)INV_ICM20608D
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},
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{
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.compatible = "invensense,icm20609",
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.data = (void *)INV_ICM20609
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},
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{
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.compatible = "invensense,icm20689",
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.data = (void *)INV_ICM20689
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},
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{
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.compatible = "invensense,icm20602",
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.data = (void *)INV_ICM20602
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},
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{
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.compatible = "invensense,icm20690",
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.data = (void *)INV_ICM20690
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},
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{
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.compatible = "invensense,iam20680",
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.data = (void *)INV_IAM20680
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},
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{ }
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};
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MODULE_DEVICE_TABLE(of, inv_of_match);
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static const struct acpi_device_id inv_acpi_match[] = {
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{"INVN6500", INV_MPU6500},
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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 i2c_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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.of_match_table = inv_of_match,
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.acpi_match_table = inv_acpi_match,
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.name = "inv-mpu6050-i2c",
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.pm = &inv_mpu_pmops,
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},
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};
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module_i2c_driver(inv_mpu_driver);
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MODULE_AUTHOR("Invensense Corporation");
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MODULE_DESCRIPTION("Invensense device MPU6050 driver");
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MODULE_LICENSE("GPL");
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