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Commit 4da38f1b authored by Rui Miguel Silva's avatar Rui Miguel Silva Committed by Jonathan Cameron
Browse files

iio: gyro: fxas21002c: add spi driver 



Add driver to talk over spi to a fxas21002c gyroscope device and use
the core as main controller.

Signed-off-by: default avatarRui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent a034cbe1

drivers/iio/gyro/Kconfig

+6 −1
Original line number Diff line number Diff line
@@ -78,7 +78,8 @@ config FXAS21002C 
       select IIO_BUFFER

       select IIO_TRIGGERED_BUFFER

       select FXAS21002C_I2C if (I2C)

       depends on I2C

       select FXAS21002C_SPI if (SPI)

       depends on (I2C || SPI_MASTER)

       help

         Say yes here to build support for NXP FXAS21002C Tri-axis Gyro

         Sensor driver connected via I2C or SPI.
@@ -90,6 +91,10 @@ config FXAS21002C_I2C 
       tristate

       select REGMAP_I2C



config FXAS21002C_SPI

       tristate

       select REGMAP_SPI



config HID_SENSOR_GYRO_3D

	depends on HID_SENSOR_HUB

	select IIO_BUFFER

drivers/iio/gyro/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ obj-$(CONFIG_BMG160_I2C) += bmg160_i2c.o 
obj-$(CONFIG_BMG160_SPI) += bmg160_spi.o

obj-$(CONFIG_FXAS21002C) += fxas21002c_core.o

obj-$(CONFIG_FXAS21002C_I2C) += fxas21002c_i2c.o

obj-$(CONFIG_FXAS21002C_SPI) += fxas21002c_spi.o



obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o

drivers/iio/gyro/fxas21002c_spi.c

0 → 100644
+70 −0
Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0

/*

 * Driver for NXP Fxas21002c Gyroscope - SPI

 *

 * Copyright (C) 2019 Linaro Ltd.

 */



#include <linux/err.h>

#include <linux/mod_devicetable.h>

#include <linux/module.h>

#include <linux/regmap.h>

#include <linux/spi/spi.h>



#include "fxas21002c.h"



static const struct regmap_config fxas21002c_regmap_spi_conf = {

	.reg_bits = 8,

	.val_bits = 8,

	.max_register = FXAS21002C_REG_CTRL3,

};



static int fxas21002c_spi_probe(struct spi_device *spi)

{

	const struct spi_device_id *id = spi_get_device_id(spi);

	struct regmap *regmap;



	regmap = devm_regmap_init_spi(spi, &fxas21002c_regmap_spi_conf);

	if (IS_ERR(regmap)) {

		dev_err(&spi->dev, "Failed to register spi regmap: %ld\n",

			PTR_ERR(regmap));

		return PTR_ERR(regmap);

	}



	return fxas21002c_core_probe(&spi->dev, regmap, spi->irq, id->name);

}



static int fxas21002c_spi_remove(struct spi_device *spi)

{

	fxas21002c_core_remove(&spi->dev);



	return 0;

}



static const struct spi_device_id fxas21002c_spi_id[] = {

	{ "fxas21002c", 0 },

	{ }

};

MODULE_DEVICE_TABLE(spi, fxas21002c_spi_id);



static const struct of_device_id fxas21002c_spi_of_match[] = {

	{ .compatible = "nxp,fxas21002c", },

	{ }

};

MODULE_DEVICE_TABLE(of, fxas21002c_spi_of_match);



static struct spi_driver fxas21002c_spi_driver = {

	.driver = {

		.name = "fxas21002c_spi",

		.pm = &fxas21002c_pm_ops,

		.of_match_table = fxas21002c_spi_of_match,

	},

	.probe		= fxas21002c_spi_probe,

	.remove		= fxas21002c_spi_remove,

	.id_table	= fxas21002c_spi_id,

};

module_spi_driver(fxas21002c_spi_driver);



MODULE_AUTHOR("Rui Miguel Silva <rui.silva@linaro.org>");

MODULE_LICENSE("GPL v2");

MODULE_DESCRIPTION("FXAS21002C SPI Gyro driver");