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iio: imu: inv_mpu6050: Add SPI support for MPU6000

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The only difference between the MPU6000 and the
MPU6050 is that the first also supports SPI.
Add SPI driver for this chip.

Signed-off-by: Adriana Reus <adriana.reus@intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Adriana Reus 2016-02-12 13:44:45 +02:00 committed by Jonathan Cameron
parent b3eea8dacf
commit fd64df16f4
6 changed files with 123 additions and 3 deletions
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11
drivers/iio/imu/inv_mpu6050/Kconfig
View File

@ -20,3 +20,14 @@ config INV_MPU6050_I2C
It is a gyroscope/accelerometer combo device.
This driver can be built as a module. The module will be called
inv-mpu6050-i2c.
config INV_MPU6050_SPI
tristate "Invensense MPU6050 devices (SPI)"
depends on SPI_MASTER
select INV_MPU6050_IIO
select REGMAP_SPI
help
This driver supports the Invensense MPU6050 devices.
It is a gyroscope/accelerometer combo device.
This driver can be built as a module. The module will be called
inv-mpu6050-spi.

3
drivers/iio/imu/inv_mpu6050/Makefile
View File

@ -7,3 +7,6 @@ inv-mpu6050-objs := inv_mpu_core.o inv_mpu_ring.o inv_mpu_trigger.o
obj-$(CONFIG_INV_MPU6050_I2C) += inv-mpu6050-i2c.o
inv-mpu6050-i2c-objs := inv_mpu_i2c.o inv_mpu_acpi.o
obj-$(CONFIG_INV_MPU6050_SPI) += inv-mpu6050-spi.o
inv-mpu6050-spi-objs := inv_mpu_spi.o

7
drivers/iio/imu/inv_mpu6050/inv_mpu_core.c
View File

@ -152,6 +152,7 @@ int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on)
return 0;
}
EXPORT_SYMBOL_GPL(inv_mpu6050_set_power_itg);
/**
* inv_mpu6050_init_config() - Initialize hardware, disable FIFO.
@ -676,7 +677,8 @@ static int inv_check_and_setup_chip(struct inv_mpu6050_state *st)
return 0;
}
int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name)
int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
int (*inv_mpu_bus_setup)(struct iio_dev *))
{
struct inv_mpu6050_state *st;
struct iio_dev *indio_dev;
@ -700,6 +702,9 @@ int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name)
if (result)
return result;
if (inv_mpu_bus_setup)
inv_mpu_bus_setup(indio_dev);
result = inv_mpu6050_init_config(indio_dev);
if (result) {
dev_err(dev, "Could not initialize device.\n");

2
drivers/iio/imu/inv_mpu6050/inv_mpu_i2c.c
View File

@ -129,7 +129,7 @@ static int inv_mpu_probe(struct i2c_client *client,
return PTR_ERR(regmap);
}
result = inv_mpu_core_probe(regmap, client->irq, name);
result = inv_mpu_core_probe(regmap, client->irq, name, NULL);
if (result < 0)
return result;

6
drivers/iio/imu/inv_mpu6050/inv_mpu_iio.h
View File

@ -62,6 +62,7 @@ struct inv_mpu6050_reg_map {
enum inv_devices {
INV_MPU6050,
INV_MPU6500,
INV_MPU6000,
INV_NUM_PARTS
};
@ -154,6 +155,7 @@ struct inv_mpu6050_state {
#define INV_MPU6050_BIT_I2C_MST_EN 0x20
#define INV_MPU6050_BIT_FIFO_EN 0x40
#define INV_MPU6050_BIT_DMP_EN 0x80
#define INV_MPU6050_BIT_I2C_IF_DIS 0x10
#define INV_MPU6050_REG_PWR_MGMT_1 0x6B
#define INV_MPU6050_BIT_H_RESET 0x80
@ -258,6 +260,8 @@ int inv_mpu6050_write_reg(struct inv_mpu6050_state *st, int reg, u8 val);
int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on);
int inv_mpu_acpi_create_mux_client(struct i2c_client *client);
void inv_mpu_acpi_delete_mux_client(struct i2c_client *client);
int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name);
int inv_mpu_core_probe(struct regmap *regmap, int irq, const char *name,
int (*inv_mpu_bus_setup)(struct iio_dev *));
int inv_mpu_core_remove(struct device *dev);
int inv_mpu6050_set_power_itg(struct inv_mpu6050_state *st, bool power_on);
extern const struct dev_pm_ops inv_mpu_pmops;

97
drivers/iio/imu/inv_mpu6050/inv_mpu_spi.c Normal file
View File

@ -0,0 +1,97 @@
/*
* Copyright (C) 2015 Intel Corporation Inc.
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#include <linux/module.h>
#include <linux/acpi.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include <linux/iio/iio.h>
#include "inv_mpu_iio.h"
static const struct regmap_config inv_mpu_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static int inv_mpu_i2c_disable(struct iio_dev *indio_dev)
{
struct inv_mpu6050_state *st = iio_priv(indio_dev);
int ret = 0;
ret = inv_mpu6050_set_power_itg(st, true);
if (ret)
return ret;
ret = regmap_write(st->map, INV_MPU6050_REG_USER_CTRL,
INV_MPU6050_BIT_I2C_IF_DIS);
if (ret) {
inv_mpu6050_set_power_itg(st, false);
return ret;
}
return inv_mpu6050_set_power_itg(st, false);
}
static int inv_mpu_probe(struct spi_device *spi)
{
struct regmap *regmap;
const struct spi_device_id *id = spi_get_device_id(spi);
const char *name = id ? id->name : NULL;
regmap = devm_regmap_init_spi(spi, &inv_mpu_regmap_config);
if (IS_ERR(regmap)) {
dev_err(&spi->dev, "Failed to register spi regmap %d\n",
(int)PTR_ERR(regmap));
return PTR_ERR(regmap);
}
return inv_mpu_core_probe(regmap, spi->irq, name, inv_mpu_i2c_disable);
}
static int inv_mpu_remove(struct spi_device *spi)
{
return inv_mpu_core_remove(&spi->dev);
}
/*
* device id table is used to identify what device can be
* supported by this driver
*/
static const struct spi_device_id inv_mpu_id[] = {
{"mpu6000", INV_MPU6000},
{}
};
MODULE_DEVICE_TABLE(spi, inv_mpu_id);
static const struct acpi_device_id inv_acpi_match[] = {
{"INVN6000", 0},
{ },
};
MODULE_DEVICE_TABLE(acpi, inv_acpi_match);
static struct spi_driver inv_mpu_driver = {
.probe = inv_mpu_probe,
.remove = inv_mpu_remove,
.id_table = inv_mpu_id,
.driver = {
.acpi_match_table = ACPI_PTR(inv_acpi_match),
.name = "inv-mpu6000-spi",
.pm = &inv_mpu_pmops,
},
};
module_spi_driver(inv_mpu_driver);
MODULE_AUTHOR("Adriana Reus <adriana.reus@intel.com>");
MODULE_DESCRIPTION("Invensense device MPU6000 driver");
MODULE_LICENSE("GPL");