Commit 7c1d1677 authored by Matti Vaittinen's avatar Matti Vaittinen Committed by Jonathan Cameron
Browse files

iio: accel: Support Kionix/ROHM KX022A accelerometer 



KX022A is a 3-axis accelerometer from ROHM/Kionix. The sensor features
include variable ODRs, I2C and SPI control, FIFO/LIFO with watermark IRQ,
tap/motion detection, wake-up & back-to-sleep events, four acceleration
ranges (2, 4, 8 and 16g), and probably some other cool features.

Add support for the basic accelerometer features such as getting the
acceleration data via IIO. (raw reads, triggered buffer [data-ready] or
using the WMI IRQ).

Important things to be added include the double-tap, motion
detection and wake-up as well as the runtime power management.

Signed-off-by: default avatarMatti Vaittinen <mazziesaccount@gmail.com>
Reviewed-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/758b00d6aea0a6431a5a3a78d557d449c113b21e.1666614295.git.mazziesaccount@gmail.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent b52e2f19

drivers/iio/accel/Kconfig

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@@ -409,6 +409,27 @@ config IIO_ST_ACCEL_SPI_3AXIS 
	  To compile this driver as a module, choose M here. The module

	  will be called st_accel_spi.



config IIO_KX022A

	tristate



config IIO_KX022A_SPI

	tristate "Kionix KX022A tri-axis digital accelerometer SPI interface"

	depends on SPI

	select IIO_KX022A

	select REGMAP_SPI

	help

	  Enable support for the Kionix KX022A digital tri-axis

	  accelerometer connected to I2C interface.



config IIO_KX022A_I2C

	tristate "Kionix KX022A tri-axis digital accelerometer I2C interface"

	depends on I2C

	select IIO_KX022A

	select REGMAP_I2C

	help

	  Enable support for the Kionix KX022A digital tri-axis

	  accelerometer connected to I2C interface.



config KXSD9

	tristate "Kionix KXSD9 Accelerometer Driver"

	select IIO_BUFFER

drivers/iio/accel/Makefile

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@@ -40,6 +40,9 @@ obj-$(CONFIG_FXLS8962AF) += fxls8962af-core.o 
obj-$(CONFIG_FXLS8962AF_I2C)	+= fxls8962af-i2c.o

obj-$(CONFIG_FXLS8962AF_SPI)	+= fxls8962af-spi.o

obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o

obj-$(CONFIG_IIO_KX022A)	+= kionix-kx022a.o

obj-$(CONFIG_IIO_KX022A_I2C)	+= kionix-kx022a-i2c.o

obj-$(CONFIG_IIO_KX022A_SPI)	+= kionix-kx022a-spi.o

obj-$(CONFIG_KXCJK1013) += kxcjk-1013.o

obj-$(CONFIG_KXSD9)	+= kxsd9.o

obj-$(CONFIG_KXSD9_SPI)	+= kxsd9-spi.o

drivers/iio/accel/kionix-kx022a-i2c.c

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+51 −0
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// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (C) 2022 ROHM Semiconductors

 *

 * ROHM/KIONIX KX022A accelerometer driver

 */



#include <linux/i2c.h>

#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/regmap.h>



#include "kionix-kx022a.h"



static int kx022a_i2c_probe(struct i2c_client *i2c)

{

	struct device *dev = &i2c->dev;

	struct regmap *regmap;



	if (!i2c->irq) {

		dev_err(dev, "No IRQ configured\n");

		return -EINVAL;

	}



	regmap = devm_regmap_init_i2c(i2c, &kx022a_regmap);

	if (IS_ERR(regmap))

		return dev_err_probe(dev, PTR_ERR(regmap),

				     "Failed to initialize Regmap\n");



	return kx022a_probe_internal(dev);

}



static const struct of_device_id kx022a_of_match[] = {

	{ .compatible = "kionix,kx022a", },

	{ }

};

MODULE_DEVICE_TABLE(of, kx022a_of_match);



static struct i2c_driver kx022a_i2c_driver = {

	.driver = {

		.name  = "kx022a-i2c",

		.of_match_table = kx022a_of_match,

	  },

	.probe_new    = kx022a_i2c_probe,

};

module_i2c_driver(kx022a_i2c_driver);



MODULE_DESCRIPTION("ROHM/Kionix KX022A accelerometer driver");

MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");

MODULE_LICENSE("GPL");

MODULE_IMPORT_NS(IIO_KX022A);

drivers/iio/accel/kionix-kx022a-spi.c

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Original line number Diff line number Diff line 
// SPDX-License-Identifier: GPL-2.0-only

/*

 * Copyright (C) 2022 ROHM Semiconductors

 *

 * ROHM/KIONIX KX022A accelerometer driver

 */



#include <linux/interrupt.h>

#include <linux/module.h>

#include <linux/regmap.h>

#include <linux/spi/spi.h>



#include "kionix-kx022a.h"



static int kx022a_spi_probe(struct spi_device *spi)

{

	struct device *dev = &spi->dev;

	struct regmap *regmap;



	if (!spi->irq) {

		dev_err(dev, "No IRQ configured\n");

		return -EINVAL;

	}



	regmap = devm_regmap_init_spi(spi, &kx022a_regmap);

	if (IS_ERR(regmap))

		return dev_err_probe(dev, PTR_ERR(regmap),

				     "Failed to initialize Regmap\n");



	return kx022a_probe_internal(dev);

}



static const struct spi_device_id kx022a_id[] = {

	{ "kx022a" },

	{ }

};

MODULE_DEVICE_TABLE(spi, kx022a_id);



static const struct of_device_id kx022a_of_match[] = {

	{ .compatible = "kionix,kx022a", },

	{ }

};

MODULE_DEVICE_TABLE(of, kx022a_of_match);



static struct spi_driver kx022a_spi_driver = {

	.driver = {

		.name   = "kx022a-spi",

		.of_match_table = kx022a_of_match,

	},

	.probe = kx022a_spi_probe,

	.id_table = kx022a_id,

};

module_spi_driver(kx022a_spi_driver);



MODULE_DESCRIPTION("ROHM/Kionix kx022A accelerometer driver");

MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");

MODULE_LICENSE("GPL");

MODULE_IMPORT_NS(IIO_KX022A);

drivers/iio/accel/kionix-kx022a.c

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