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126 lines
3.1 KiB
126 lines
3.1 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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#include <linux/err.h> |
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#include <linux/i2c.h> |
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#include <linux/i2c-mux.h> |
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#include <linux/iio/iio.h> |
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#include <linux/module.h> |
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#include <linux/regmap.h> |
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#include <linux/pm_runtime.h> |
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#include "mpu3050.h" |
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static const struct regmap_config mpu3050_i2c_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 mpu3050_i2c_bypass_select(struct i2c_mux_core *mux, u32 chan_id) |
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{ |
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struct mpu3050 *mpu3050 = i2c_mux_priv(mux); |
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/* Just power up the device, that is all that is needed */ |
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pm_runtime_get_sync(mpu3050->dev); |
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return 0; |
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} |
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static int mpu3050_i2c_bypass_deselect(struct i2c_mux_core *mux, u32 chan_id) |
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{ |
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struct mpu3050 *mpu3050 = i2c_mux_priv(mux); |
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pm_runtime_mark_last_busy(mpu3050->dev); |
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pm_runtime_put_autosuspend(mpu3050->dev); |
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return 0; |
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} |
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static int mpu3050_i2c_probe(struct i2c_client *client, |
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const struct i2c_device_id *id) |
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{ |
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struct regmap *regmap; |
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const char *name; |
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struct mpu3050 *mpu3050; |
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int ret; |
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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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if (id) |
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name = id->name; |
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else |
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return -ENODEV; |
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regmap = devm_regmap_init_i2c(client, &mpu3050_i2c_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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ret = mpu3050_common_probe(&client->dev, regmap, client->irq, name); |
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if (ret) |
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return ret; |
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/* The main driver is up, now register the I2C mux */ |
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mpu3050 = iio_priv(dev_get_drvdata(&client->dev)); |
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mpu3050->i2cmux = i2c_mux_alloc(client->adapter, &client->dev, |
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1, 0, I2C_MUX_LOCKED | I2C_MUX_GATE, |
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mpu3050_i2c_bypass_select, |
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mpu3050_i2c_bypass_deselect); |
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/* Just fail the mux, there is no point in killing the driver */ |
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if (!mpu3050->i2cmux) |
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dev_err(&client->dev, "failed to allocate I2C mux\n"); |
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else { |
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mpu3050->i2cmux->priv = mpu3050; |
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/* Ignore failure, not critical */ |
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i2c_mux_add_adapter(mpu3050->i2cmux, 0, 0, 0); |
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} |
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return 0; |
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} |
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static int mpu3050_i2c_remove(struct i2c_client *client) |
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{ |
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struct iio_dev *indio_dev = dev_get_drvdata(&client->dev); |
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struct mpu3050 *mpu3050 = iio_priv(indio_dev); |
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if (mpu3050->i2cmux) |
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i2c_mux_del_adapters(mpu3050->i2cmux); |
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mpu3050_common_remove(&client->dev); |
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return 0; |
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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 mpu3050_i2c_id[] = { |
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{ "mpu3050" }, |
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{} |
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}; |
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MODULE_DEVICE_TABLE(i2c, mpu3050_i2c_id); |
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static const struct of_device_id mpu3050_i2c_of_match[] = { |
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{ .compatible = "invensense,mpu3050", .data = "mpu3050" }, |
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/* Deprecated vendor ID from the Input driver */ |
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{ .compatible = "invn,mpu3050", .data = "mpu3050" }, |
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{ }, |
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}; |
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MODULE_DEVICE_TABLE(of, mpu3050_i2c_of_match); |
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static struct i2c_driver mpu3050_i2c_driver = { |
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.probe = mpu3050_i2c_probe, |
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.remove = mpu3050_i2c_remove, |
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.id_table = mpu3050_i2c_id, |
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.driver = { |
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.of_match_table = mpu3050_i2c_of_match, |
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.name = "mpu3050-i2c", |
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.pm = pm_ptr(&mpu3050_dev_pm_ops), |
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}, |
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}; |
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module_i2c_driver(mpu3050_i2c_driver); |
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MODULE_AUTHOR("Linus Walleij"); |
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MODULE_DESCRIPTION("Invensense MPU3050 gyroscope driver"); |
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MODULE_LICENSE("GPL");
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