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iio: imu: st_lsm6dsx: add i3c basic support for LSM6DSO and LSM6DSR 

For today the st_lsm6dsx driver support LSM6DSO and LSM6DSR sensor only in
spi and i2c mode.

The LSM6DSO and LSM6DSR are also i3c capable so let's give i3c support to
them.

Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
alistair/sunxi64-5.4-dsi
Vitor Soares 2019-07-19 15:30:55 +02:00 committed by Jonathan Cameron
parent 62f5b7c724
commit 2660b0080b
3 changed files with 65 additions and 1 deletions
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8
drivers/iio/imu/st_lsm6dsx/Kconfig
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@ -2,11 +2,12 @@
config IIO_ST_LSM6DSX
tristate "ST_LSM6DSx driver for STM 6-axis IMU MEMS sensors"
depends on (I2C || SPI)
depends on (I2C || SPI || I3C)
select IIO_BUFFER
select IIO_KFIFO_BUF
select IIO_ST_LSM6DSX_I2C if (I2C)
select IIO_ST_LSM6DSX_SPI if (SPI_MASTER)
select IIO_ST_LSM6DSX_I3C if (I3C)
help
Say yes here to build support for STMicroelectronics LSM6DSx imu
sensor. Supported devices: lsm6ds3, lsm6ds3h, lsm6dsl, lsm6dsm,
@ -24,3 +25,8 @@ config IIO_ST_LSM6DSX_SPI
tristate
depends on IIO_ST_LSM6DSX
select REGMAP_SPI
config IIO_ST_LSM6DSX_I3C
tristate
depends on IIO_ST_LSM6DSX
select REGMAP_I3C

1
drivers/iio/imu/st_lsm6dsx/Makefile
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@ -5,3 +5,4 @@ st_lsm6dsx-y := st_lsm6dsx_core.o st_lsm6dsx_buffer.o \
obj-$(CONFIG_IIO_ST_LSM6DSX) += st_lsm6dsx.o
obj-$(CONFIG_IIO_ST_LSM6DSX_I2C) += st_lsm6dsx_i2c.o
obj-$(CONFIG_IIO_ST_LSM6DSX_SPI) += st_lsm6dsx_spi.o
obj-$(CONFIG_IIO_ST_LSM6DSX_I3C) += st_lsm6dsx_i3c.o

57
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c 100644
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@ -0,0 +1,57 @@
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
*
* Author: Vitor Soares <vitor.soares@synopsys.com>
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/i3c/device.h>
#include <linux/i3c/master.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include "st_lsm6dsx.h"
static const struct i3c_device_id st_lsm6dsx_i3c_ids[] = {
I3C_DEVICE(0x0104, 0x006C, (void *)ST_LSM6DSO_ID),
I3C_DEVICE(0x0104, 0x006B, (void *)ST_LSM6DSR_ID),
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
static int st_lsm6dsx_i3c_probe(struct i3c_device *i3cdev)
{
struct regmap_config st_lsm6dsx_i3c_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
const struct i3c_device_id *id = i3c_device_match_id(i3cdev,
st_lsm6dsx_i3c_ids);
struct regmap *regmap;
regmap = devm_regmap_init_i3c(i3cdev, &st_lsm6dsx_i3c_regmap_config);
if (IS_ERR(regmap)) {
dev_err(&i3cdev->dev, "Failed to register i3c regmap %d\n",
(int)PTR_ERR(regmap));
return PTR_ERR(regmap);
}
return st_lsm6dsx_probe(&i3cdev->dev, 0, (uintptr_t)id->data, regmap);
}
static struct i3c_driver st_lsm6dsx_driver = {
.driver = {
.name = "st_lsm6dsx_i3c",
.pm = &st_lsm6dsx_pm_ops,
},
.probe = st_lsm6dsx_i3c_probe,
.id_table = st_lsm6dsx_i3c_ids,
};
module_i3c_driver(st_lsm6dsx_driver);
MODULE_AUTHOR("Vitor Soares <vitor.soares@synopsys.com>");
MODULE_DESCRIPTION("STMicroelectronics st_lsm6dsx i3c driver");
MODULE_LICENSE("GPL v2");