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: Matti Vaittinen <mazziesaccount@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Link: https://lore.kernel.org/r/758b00d6aea0a6431a5a3a78d557d449c113b21e.1666614295.git.mazziesaccount@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Matti Vaittinen 2022-10-24 15:40:29 +03:00 committed by Jonathan Cameron
parent b52e2f19f8
commit 7c1d1677b3
6 changed files with 1357 additions and 0 deletions

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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

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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

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@ -0,0 +1,51 @@
// 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);

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@ -0,0 +1,58 @@
// 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);

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@ -0,0 +1,82 @@
/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2022 ROHM Semiconductors
*
* ROHM/KIONIX KX022A accelerometer driver
*/
#ifndef _KX022A_H_
#define _KX022A_H_
#include <linux/bits.h>
#include <linux/regmap.h>
#define KX022A_REG_WHO 0x0f
#define KX022A_ID 0xc8
#define KX022A_REG_CNTL2 0x19
#define KX022A_MASK_SRST BIT(7)
#define KX022A_REG_CNTL 0x18
#define KX022A_MASK_PC1 BIT(7)
#define KX022A_MASK_RES BIT(6)
#define KX022A_MASK_DRDY BIT(5)
#define KX022A_MASK_GSEL GENMASK(4, 3)
#define KX022A_GSEL_SHIFT 3
#define KX022A_GSEL_2 0x0
#define KX022A_GSEL_4 BIT(3)
#define KX022A_GSEL_8 BIT(4)
#define KX022A_GSEL_16 GENMASK(4, 3)
#define KX022A_REG_INS2 0x13
#define KX022A_MASK_INS2_DRDY BIT(4)
#define KX122_MASK_INS2_WMI BIT(5)
#define KX022A_REG_XHP_L 0x0
#define KX022A_REG_XOUT_L 0x06
#define KX022A_REG_YOUT_L 0x08
#define KX022A_REG_ZOUT_L 0x0a
#define KX022A_REG_COTR 0x0c
#define KX022A_REG_TSCP 0x10
#define KX022A_REG_INT_REL 0x17
#define KX022A_REG_ODCNTL 0x1b
#define KX022A_REG_BTS_WUF_TH 0x31
#define KX022A_REG_MAN_WAKE 0x2c
#define KX022A_REG_BUF_CNTL1 0x3a
#define KX022A_MASK_WM_TH GENMASK(6, 0)
#define KX022A_REG_BUF_CNTL2 0x3b
#define KX022A_MASK_BUF_EN BIT(7)
#define KX022A_MASK_BRES16 BIT(6)
#define KX022A_REG_BUF_STATUS_1 0x3c
#define KX022A_REG_BUF_STATUS_2 0x3d
#define KX022A_REG_BUF_CLEAR 0x3e
#define KX022A_REG_BUF_READ 0x3f
#define KX022A_MASK_ODR GENMASK(3, 0)
#define KX022A_ODR_SHIFT 3
#define KX022A_FIFO_MAX_WMI_TH 41
#define KX022A_REG_INC1 0x1c
#define KX022A_REG_INC5 0x20
#define KX022A_REG_INC6 0x21
#define KX022A_MASK_IEN BIT(5)
#define KX022A_MASK_IPOL BIT(4)
#define KX022A_IPOL_LOW 0
#define KX022A_IPOL_HIGH KX022A_MASK_IPOL1
#define KX022A_MASK_ITYP BIT(3)
#define KX022A_ITYP_PULSE KX022A_MASK_ITYP
#define KX022A_ITYP_LEVEL 0
#define KX022A_REG_INC4 0x1f
#define KX022A_MASK_WMI BIT(5)
#define KX022A_REG_SELF_TEST 0x60
#define KX022A_MAX_REGISTER 0x60
struct device;
int kx022a_probe_internal(struct device *dev);
extern const struct regmap_config kx022a_regmap;
#endif