diff mbox series

[v6,13/14] iio: imu: add BNO055 I2C driver

Message ID 20220613120534.36991-14-andrea.merello@iit.it
State Accepted
Commit 50fe984f376abb4a00f80e13f51465ef09c2bde7
Headers show
Series Add support for Bosch BNO055 IMU | expand

Commit Message

andrea.merello@iit.it June 13, 2022, 12:05 p.m. UTC 
From: Andrea Merello <andrea.merello@iit.it>

Add an I2C driver for communicating to a BNO055 IMU via I2C bus and enable
the BNO055 core driver to work in this scenario.

Signed-off-by: Andrea Merello <andrea.merello@iit.it>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
---
 drivers/iio/imu/bno055/Kconfig      | 11 ++++++
 drivers/iio/imu/bno055/Makefile     |  2 +
 drivers/iio/imu/bno055/bno055_i2c.c | 57 +++++++++++++++++++++++++++++
 3 files changed, 70 insertions(+)
 create mode 100644 drivers/iio/imu/bno055/bno055_i2c.c
diff mbox series

Patch

diff --git a/drivers/iio/imu/bno055/Kconfig b/drivers/iio/imu/bno055/Kconfig
index d014b68cd43d..ccf9ea7c50f8 100644
--- a/drivers/iio/imu/bno055/Kconfig
+++ b/drivers/iio/imu/bno055/Kconfig
@@ -12,3 +12,14 @@  config BOSCH_BNO055_SERIAL
 
 	  This driver can also be built as a module. If so, the module will be
 	  called bno055_sl.
+
+config BOSCH_BNO055_I2C
+	tristate "Bosch BNO055 attached via I2C bus"
+	depends on I2C
+	select REGMAP_I2C
+	select BOSCH_BNO055_IIO
+	help
+	  Enable this to support Bosch BNO055 IMUs attached via I2C bus.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called bno055_i2c.
diff --git a/drivers/iio/imu/bno055/Makefile b/drivers/iio/imu/bno055/Makefile
index 212307ce9c08..f0be80accb5b 100644
--- a/drivers/iio/imu/bno055/Makefile
+++ b/drivers/iio/imu/bno055/Makefile
@@ -6,3 +6,5 @@  bno055_ser-y := bno055_ser_core.o
 # define_trace.h needs to know how to find our header
 CFLAGS_bno055_ser_trace.o := -I$(src)
 bno055_ser-$(CONFIG_TRACING) += bno055_ser_trace.o
+
+obj-$(CONFIG_BOSCH_BNO055_I2C) += bno055_i2c.o
diff --git a/drivers/iio/imu/bno055/bno055_i2c.c b/drivers/iio/imu/bno055/bno055_i2c.c
new file mode 100644
index 000000000000..9bb256fdb0d3
--- /dev/null
+++ b/drivers/iio/imu/bno055/bno055_i2c.c
@@ -0,0 +1,57 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Support for I2C-interfaced Bosch BNO055 IMU.
+ *
+ * Copyright (C) 2021-2022 Istituto Italiano di Tecnologia
+ * Electronic Design Laboratory
+ * Written by Andrea Merello <andrea.merello@iit.it>
+ */
+
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "bno055.h"
+
+#define BNO055_I2C_XFER_BURST_BREAK_THRESHOLD 3 /* FIXME */
+
+static int bno055_i2c_probe(struct i2c_client *client)
+{
+	struct regmap *regmap;
+
+	regmap = devm_regmap_init_i2c(client, &bno055_regmap_config);
+	if (IS_ERR(regmap))
+		return dev_err_probe(&client->dev, PTR_ERR(regmap),
+				     "Unable to init register map");
+
+	return bno055_probe(&client->dev, regmap,
+			    BNO055_I2C_XFER_BURST_BREAK_THRESHOLD, true);
+}
+
+static const struct i2c_device_id bno055_i2c_id[] = {
+	{"bno055", 0},
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, bno055_i2c_id);
+
+static const struct of_device_id __maybe_unused bno055_i2c_of_match[] = {
+	{ .compatible = "bosch,bno055" },
+	{ },
+};
+MODULE_DEVICE_TABLE(of, bno055_i2c_of_match);
+
+static struct i2c_driver bno055_driver = {
+	.driver = {
+		.name = "bno055-i2c",
+		.of_match_table = of_match_ptr(bno055_i2c_of_match),
+	},
+	.probe_new = bno055_i2c_probe,
+	.id_table = bno055_i2c_id,
+};
+module_i2c_driver(bno055_driver);
+
+MODULE_AUTHOR("Andrea Merello");
+MODULE_DESCRIPTION("Bosch BNO055 I2C interface");
+MODULE_IMPORT_NS(IIO_BNO055);
+MODULE_LICENSE("GPL");