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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: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
hifive-unleashed-5.2
Rui Miguel Silva 2019-04-12 17:48:59 +01:00 committed by Jonathan Cameron
parent a034cbe1c4
commit 4da38f1be6
3 changed files with 77 additions and 1 deletions
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7
drivers/iio/gyro/Kconfig
View File

@ -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

1
drivers/iio/gyro/Makefile
View File

@ -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

70
drivers/iio/gyro/fxas21002c_spi.c 100644
View File

@ -0,0 +1,70 @@
// 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");