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Subject[PATCH v2 3/3] iio: imu: st_lsm6dsx: add i3c basic support for LSM6DSO and LSM6DSR
Date
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 lets give i3c support to
them.

Signed-off-by: Vitor Soares <vitor.soares@synopsys.com>
---
Changes in v2:
Add support for LSM6DSR
Set pm_ops to st_lsm6dsx_pm_ops

drivers/iio/imu/st_lsm6dsx/Kconfig | 8 ++-
drivers/iio/imu/st_lsm6dsx/Makefile | 1 +
drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c | 76 +++++++++++++++++++++++++++++
3 files changed, 84 insertions(+), 1 deletion(-)
create mode 100644 drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c

diff --git a/drivers/iio/imu/st_lsm6dsx/Kconfig b/drivers/iio/imu/st_lsm6dsx/Kconfig
index 002a423..8115936 100644
--- a/drivers/iio/imu/st_lsm6dsx/Kconfig
+++ b/drivers/iio/imu/st_lsm6dsx/Kconfig
@@ -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
diff --git a/drivers/iio/imu/st_lsm6dsx/Makefile b/drivers/iio/imu/st_lsm6dsx/Makefile
index 28cc673..57cbcd6 100644
--- a/drivers/iio/imu/st_lsm6dsx/Makefile
+++ b/drivers/iio/imu/st_lsm6dsx/Makefile
@@ -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
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
new file mode 100644
index 0000000..70b70d1
--- /dev/null
+++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_i3c.c
@@ -0,0 +1,76 @@
+// 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"
+
+#define NAME_SIZE 32
+
+struct st_lsm6dsx_i3c_data {
+ const char name[NAME_SIZE];
+ enum st_lsm6dsx_hw_id id;
+};
+
+enum st_lsm6dsx_i3c_data_id {
+ ST_LSM6DSO_I3C_DATA_ID,
+ ST_LSM6DSR_I3C_DATA_ID,
+};
+
+static const struct st_lsm6dsx_i3c_data hw_data[] = {
+ { ST_LSM6DSO_DEV_NAME, ST_LSM6DSO_ID },
+ { ST_LSM6DSR_DEV_NAME, ST_LSM6DSR_ID },
+};
+
+static const struct regmap_config st_lsm6dsx_i3c_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+};
+
+static int st_lsm6dsx_i3c_probe(struct i3c_device *i3cdev)
+{
+ const struct i3c_device_id *id = i3c_get_device_id(i3cdev);
+ const struct st_lsm6dsx_i3c_data *hw_data = id->data;
+ 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, hw_data->id,
+ hw_data->name, regmap);
+}
+
+static const struct i3c_device_id st_lsm6dsx_i3c_ids[] = {
+ I3C_DEVICE(0x0104, 0x006C, &hw_data[ST_LSM6DSO_I3C_DATA_ID]),
+ I3C_DEVICE(0x0104, 0x006B, &hw_data[ST_LSM6DSR_I3C_DATA_ID]),
+ { /* sentinel */ },
+};
+MODULE_DEVICE_TABLE(i3c, st_lsm6dsx_i3c_ids);
+
+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");
--
2.7.4
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