iio: accel: bmi088: add i2c support for bmi088 accel driver

The BMI088, BMI085 and BMI090L accelerometer also support
I2C protocol, so let's add the missing I2C support.

The I2C interface of the {BMI085,BMI088,BMI090L} is compatible with
the I2C Specification UM10204 Rev. 03 (19 June 2007), available at
http://www.nxp.com. The {BMI085,BMI088,BMI090L} supports I2C standard
mode and fast mode, only 7-bit address mode is supported.

Datasheet: https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmi085-ds001.pdf
Datasheet: https://www.bosch-sensortec.com/media/boschsensortec/downloads/datasheets/bst-bmi088-ds001.pdf
Datasheet: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/4807/BST-BMI090L-DS000-00.pdf
Signed-off-by: Jun Yan <jerrysteve1101@gmail.com>
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202312191325.jfiyeL5F-lkp@intel.com/
Link: https://lore.kernel.org/r/20231219150440.264033-1-jerrysteve1101@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index 91adcac..dc92cf5 100644 (file)
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -254,11 +254,11 @@ config BMC150_ACCEL_SPI
 
 config BMI088_ACCEL
        tristate "Bosch BMI088 Accelerometer Driver"
-       depends on SPI
        select IIO_BUFFER
        select IIO_TRIGGERED_BUFFER
        select REGMAP
-       select BMI088_ACCEL_SPI
+       select BMI088_ACCEL_SPI if SPI
+       select BMI088_ACCEL_I2C if I2C
        help
          Say yes here to build support for the following Bosch accelerometers:
          BMI088, BMI085, BMI090L. Note that all of these are combo module that
@@ -267,6 +267,10 @@ config BMI088_ACCEL
          This driver only implements the accelerometer part, which has its own
          address and register map. BMG160 provides the gyroscope driver.
 
+config BMI088_ACCEL_I2C
+       tristate
+       select REGMAP_I2C
+
 config BMI088_ACCEL_SPI
        tristate
        select REGMAP_SPI

diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
index 311ead9..db90532 100644 (file)
--- a/drivers/iio/accel/Makefile
+++ b/drivers/iio/accel/Makefile
@@ -30,6 +30,7 @@ obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o
 obj-$(CONFIG_BMC150_ACCEL_I2C) += bmc150-accel-i2c.o
 obj-$(CONFIG_BMC150_ACCEL_SPI) += bmc150-accel-spi.o
 obj-$(CONFIG_BMI088_ACCEL) += bmi088-accel-core.o
+obj-$(CONFIG_BMI088_ACCEL_I2C) += bmi088-accel-i2c.o
 obj-$(CONFIG_BMI088_ACCEL_SPI) += bmi088-accel-spi.o
 obj-$(CONFIG_DA280)    += da280.o
 obj-$(CONFIG_DA311)    += da311.o

diff --git a/drivers/iio/accel/bmi088-accel-i2c.c b/drivers/iio/accel/bmi088-accel-i2c.c
new file mode 100644 (file)
index 0000000..17e9156
--- /dev/null
+++ b/drivers/iio/accel/bmi088-accel-i2c.c
@@ -0,0 +1,70 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * 3-axis accelerometer driver supporting following Bosch-Sensortec chips:
+ *  - BMI088
+ *  - BMI085
+ *  - BMI090L
+ *
+ * Copyright 2023 Jun Yan <jerrysteve1101@gmail.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include "bmi088-accel.h"
+
+static int bmi088_accel_probe(struct i2c_client *i2c)
+{
+       struct regmap *regmap;
+       const struct i2c_device_id *id = i2c_client_get_device_id(i2c);
+
+       regmap = devm_regmap_init_i2c(i2c, &bmi088_regmap_conf);
+       if (IS_ERR(regmap)) {
+               dev_err(&i2c->dev, "Failed to initialize i2c regmap\n");
+               return PTR_ERR(regmap);
+       }
+
+       return bmi088_accel_core_probe(&i2c->dev, regmap, i2c->irq,
+                                       id->driver_data);
+}
+
+static void bmi088_accel_remove(struct i2c_client *i2c)
+{
+       bmi088_accel_core_remove(&i2c->dev);
+}
+
+static const struct of_device_id bmi088_of_match[] = {
+       { .compatible = "bosch,bmi085-accel" },
+       { .compatible = "bosch,bmi088-accel" },
+       { .compatible = "bosch,bmi090l-accel" },
+       {}
+};
+MODULE_DEVICE_TABLE(of, bmi088_of_match);
+
+static const struct i2c_device_id bmi088_accel_id[] = {
+       { "bmi085-accel",  BOSCH_BMI085 },
+       { "bmi088-accel",  BOSCH_BMI088 },
+       { "bmi090l-accel", BOSCH_BMI090L },
+       {}
+};
+MODULE_DEVICE_TABLE(i2c, bmi088_accel_id);
+
+static struct i2c_driver bmi088_accel_driver = {
+       .driver = {
+               .name   = "bmi088_accel_i2c",
+               .pm     = pm_ptr(&bmi088_accel_pm_ops),
+               .of_match_table = bmi088_of_match,
+       },
+       .probe          = bmi088_accel_probe,
+       .remove         = bmi088_accel_remove,
+       .id_table       = bmi088_accel_id,
+};
+module_i2c_driver(bmi088_accel_driver);
+
+MODULE_AUTHOR("Jun Yan <jerrysteve1101@gmail.com>");
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("BMI088 accelerometer driver (I2C)");
+MODULE_IMPORT_NS(IIO_BMI088);