[PATCH 19/20] iio: bmc150: Split the driver into core and i2c

Markus Pargmann
2015-08-12T10:13:58Z

Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
---
drivers/iio/accel/Kconfig | 22 +++--
drivers/iio/accel/Makefile | 3 +-
.../accel/{bmc150-accel.c => bmc150-accel-core.c} | 95 ++++---------------
drivers/iio/accel/bmc150-accel-i2c.c | 101 +++++++++++++++++++++
drivers/iio/accel/bmc150-accel.h | 21 +++++
5 files changed, 156 insertions(+), 86 deletions(-)
rename drivers/iio/accel/{bmc150-accel.c => bmc150-accel-core.c} (95%)
create mode 100644 drivers/iio/accel/bmc150-accel-i2c.c
create mode 100644 drivers/iio/accel/bmc150-accel.h

diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index 01dd03d194d1..c63e981c38ff 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -18,22 +18,30 @@ config BMA180
module will be called bma180.

config BMC150_ACCEL
- tristate "Bosch BMC150 Accelerometer Driver"
- depends on I2C
- select IIO_BUFFER
- select IIO_TRIGGERED_BUFFER
+ bool "Bosch BMC150 Accelerometer Driver"
select REGMAP
- select REGMAP_I2C
help
Say yes here to build support for the following Bosch accelerometers:
BMC150, BMI055, BMA250E, BMA222E, BMA255, BMA280.

- Currently this only supports the device via an i2c interface.
-
This is a combo module with both accelerometer and magnetometer.
This driver is only implementing accelerometer part, which has
its own address and register map.

+if BMC150_ACCEL
+
+config BMC150_ACCEL_I2C
+ tristate "I2C support"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ select REGMAP_I2C
+ help
+ Say yes here to build support for I2C communication with the
+ mentioned accelerometer.
+
+endif
+
config HID_SENSOR_ACCEL_3D
depends on HID_SENSOR_HUB
select IIO_BUFFER
diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
index ebd2675b2a02..5ef8bdbad092 100644
--- a/drivers/iio/accel/Makefile
+++ b/drivers/iio/accel/Makefile
@@ -4,7 +4,8 @@

# When adding new entries keep the list in alphabetical order
obj-$(CONFIG_BMA180) += bma180.o
-obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel.o
+obj-$(CONFIG_BMC150_ACCEL) += bmc150-accel-core.o
+obj-$(CONFIG_BMC150_ACCEL_I2C) += bmc150-accel-i2c.o
obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o
obj-$(CONFIG_KXCJK1013) += kxcjk-1013.o
obj-$(CONFIG_KXSD9) += kxsd9.o
diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel-core.c
similarity index 95%
rename from drivers/iio/accel/bmc150-accel.c
rename to drivers/iio/accel/bmc150-accel-core.c
index d75e1b0aa7e9..8cf2786dd433 100644
--- a/drivers/iio/accel/bmc150-accel.c
+++ b/drivers/iio/accel/bmc150-accel-core.c
@@ -37,6 +37,8 @@
#include <linux/iio/triggered_buffer.h>
#include <linux/regmap.h>

+#include "bmc150-accel.h"
+
#define BMC150_ACCEL_DRV_NAME "bmc150_accel"
#define BMC150_ACCEL_IRQ_NAME "bmc150_accel_event"
#define BMC150_ACCEL_GPIO_NAME "bmc150_accel_int"
@@ -187,7 +189,6 @@ enum bmc150_accel_trigger_id {
struct bmc150_accel_data {
struct regmap *regmap;
struct device *dev;
- int irq;
struct bmc150_accel_interrupt interrupts[BMC150_ACCEL_INTERRUPTS];
atomic_t active_intr;
struct bmc150_accel_trigger triggers[BMC150_ACCEL_TRIGGERS];
@@ -201,6 +202,7 @@ struct bmc150_accel_data {
int ev_enable_state;
int64_t timestamp, old_timestamp; /* Only used in hw fifo mode. */
const struct bmc150_accel_chip_info *chip_info;
+ int irq;
};

static const struct {
@@ -1076,15 +1078,6 @@ static const struct iio_chan_spec bmc150_accel_channels[] =
static const struct iio_chan_spec bma280_accel_channels[] =
BMC150_ACCEL_CHANNELS(14);

-enum {
- bmc150,
- bmi055,
- bma255,
- bma250e,
- bma222e,
- bma280,
-};
-
static const struct bmc150_accel_chip_info bmc150_accel_chip_info_tbl[] = {
[bmc150] = {
.chip_id = 0xFA,
@@ -1573,36 +1566,22 @@ static const struct iio_buffer_setup_ops bmc150_accel_buffer_ops = {
.postdisable = bmc150_accel_buffer_postdisable,
};

-static int bmc150_accel_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
+ const char *name, int chip_id, bool block_supported)
{
struct bmc150_accel_data *data;
struct iio_dev *indio_dev;
int ret;
- const char *name = NULL;
- int chip_id = 0;
- struct device *dev;

- indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*data));
if (!indio_dev)
return -ENOMEM;

data = iio_priv(indio_dev);
- i2c_set_clientdata(client, indio_dev);
- data->dev = &client->dev;
- dev = &client->dev;
- data->irq = client->irq;
-
- data->regmap = devm_regmap_init_i2c(client, &bmc150_i2c_regmap_conf);
- if (IS_ERR(data->regmap)) {
- dev_err(dev, "Failed to initialize i2c regmap\n");
- return PTR_ERR(data->regmap);
- }
-
- if (id) {
- name = id->name;
- chip_id = id->driver_data;
- }
+ dev_set_drvdata(dev, indio_dev);
+ data->dev = dev;
+ data->irq = irq;
+ data->regmap = regmap;

if (ACPI_HANDLE(dev))
name = bmc150_accel_match_acpi_device(dev, &chip_id);
@@ -1664,9 +1643,7 @@ static int bmc150_accel_probe(struct i2c_client *client,
if (ret)
goto err_buffer_cleanup;

- if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C) ||
- i2c_check_functionality(client->adapter,
- I2C_FUNC_SMBUS_READ_I2C_BLOCK)) {
+ if (block_supported) {
indio_dev->modes |= INDIO_BUFFER_SOFTWARE;
indio_dev->info = &bmc150_accel_info_fifo;
indio_dev->buffer->attrs = bmc150_accel_fifo_attributes;
@@ -1675,7 +1652,7 @@ static int bmc150_accel_probe(struct i2c_client *client,

ret = iio_device_register(indio_dev);
if (ret < 0) {
- dev_err(data->dev, "Unable to register iio device\n");
+ dev_err(dev, "Unable to register iio device\n");
goto err_trigger_unregister;
}

@@ -1698,10 +1675,11 @@ err_buffer_cleanup:

return ret;
}
+EXPORT_SYMBOL_GPL(bmc150_accel_core_probe);

-static int bmc150_accel_remove(struct i2c_client *client)
+int bmc150_accel_core_remove(struct device *dev)
{
- struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
struct bmc150_accel_data *data = iio_priv(indio_dev);

pm_runtime_disable(data->dev);
@@ -1720,6 +1698,7 @@ static int bmc150_accel_remove(struct i2c_client *client)

return 0;
}
+EXPORT_SYMBOL_GPL(bmc150_accel_core_remove);

#ifdef CONFIG_PM_SLEEP
static int bmc150_accel_suspend(struct device *dev)
@@ -1790,48 +1769,8 @@ static int bmc150_accel_runtime_resume(struct device *dev)
}
#endif

-static const struct dev_pm_ops bmc150_accel_pm_ops = {
+const struct dev_pm_ops bmc150_accel_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(bmc150_accel_suspend, bmc150_accel_resume)
SET_RUNTIME_PM_OPS(bmc150_accel_runtime_suspend,
bmc150_accel_runtime_resume, NULL)
};
-
-static const struct acpi_device_id bmc150_accel_acpi_match[] = {
- {"BSBA0150", bmc150},
- {"BMC150A", bmc150},
- {"BMI055A", bmi055},
- {"BMA0255", bma255},
- {"BMA250E", bma250e},
- {"BMA222E", bma222e},
- {"BMA0280", bma280},
- { },
-};
-MODULE_DEVICE_TABLE(acpi, bmc150_accel_acpi_match);
-
-static const struct i2c_device_id bmc150_accel_id[] = {
- {"bmc150_accel", bmc150},
- {"bmi055_accel", bmi055},
- {"bma255", bma255},
- {"bma250e", bma250e},
- {"bma222e", bma222e},
- {"bma280", bma280},
- {}
-};
-
-MODULE_DEVICE_TABLE(i2c, bmc150_accel_id);
-
-static struct i2c_driver bmc150_accel_driver = {
- .driver = {
- .name = BMC150_ACCEL_DRV_NAME,
- .acpi_match_table = ACPI_PTR(bmc150_accel_acpi_match),
- .pm = &bmc150_accel_pm_ops,
- },
- .probe = bmc150_accel_probe,
- .remove = bmc150_accel_remove,
- .id_table = bmc150_accel_id,
-};
-module_i2c_driver(bmc150_accel_driver);
-
-MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
-MODULE_LICENSE("GPL v2");
-MODULE_DESCRIPTION("BMC150 accelerometer driver");
diff --git a/drivers/iio/accel/bmc150-accel-i2c.c b/drivers/iio/accel/bmc150-accel-i2c.c
new file mode 100644
index 000000000000..7e036e2eb077
--- /dev/null
+++ b/drivers/iio/accel/bmc150-accel-i2c.c
@@ -0,0 +1,101 @@
+/*
+ * 3-axis accelerometer driver supporting following I2C Bosch-Sensortec chips:
+ * - BMC150
+ * - BMI055
+ * - BMA255
+ * - BMA250E
+ * - BMA222E
+ * - BMA280
+ *
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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/device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/i2c.h>
+#include <linux/module.h>
+#include <linux/acpi.h>
+#include <linux/regmap.h>
+
+#include "bmc150-accel.h"
+
+static const struct regmap_config bmc150_i2c_regmap_conf = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .use_single_rw = true,
+ .cache_type = REGCACHE_NONE,
+};
+
+static int bmc150_accel_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct regmap *regmap;
+ bool block_supported =
+ i2c_check_functionality(client->adapter, I2C_FUNC_I2C) ||
+ i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_READ_I2C_BLOCK);
+
+ regmap = devm_regmap_init_i2c(client, &bmc150_i2c_regmap_conf);
+ if (IS_ERR(regmap)) {
+ dev_err(&client->dev, "Failed to initialize i2c regmap\n");
+ return PTR_ERR(regmap);
+ }
+
+ return bmc150_accel_core_probe(&client->dev, regmap, client->irq,
+ id->name, id->driver_data,
+ block_supported);
+}
+
+static int bmc150_accel_remove(struct i2c_client *client)
+{
+ return bmc150_accel_core_remove(&client->dev);
+}
+
+static const struct acpi_device_id bmc150_accel_acpi_match[] = {
+ {"BSBA0150", bmc150},
+ {"BMC150A", bmc150},
+ {"BMI055A", bmi055},
+ {"BMA0255", bma255},
+ {"BMA250E", bma250e},
+ {"BMA222E", bma222e},
+ {"BMA0280", bma280},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, bmc150_accel_acpi_match);
+
+static const struct i2c_device_id bmc150_accel_id[] = {
+ {"bmc150_accel", bmc150},
+ {"bmi055_accel", bmi055},
+ {"bma255", bma255},
+ {"bma250e", bma250e},
+ {"bma222e", bma222e},
+ {"bma280", bma280},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, bmc150_accel_id);
+
+static struct i2c_driver bmc150_accel_driver = {
+ .driver = {
+ .name = "bmc150_accel_i2c",
+ .acpi_match_table = ACPI_PTR(bmc150_accel_acpi_match),
+ .pm = &bmc150_accel_pm_ops,
+ },
+ .probe = bmc150_accel_probe,
+ .remove = bmc150_accel_remove,
+ .id_table = bmc150_accel_id,
+};
+module_i2c_driver(bmc150_accel_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("BMC150 I2C accelerometer driver");
diff --git a/drivers/iio/accel/bmc150-accel.h b/drivers/iio/accel/bmc150-accel.h
new file mode 100644
index 000000000000..988b57573d0c
--- /dev/null
+++ b/drivers/iio/accel/bmc150-accel.h
@@ -0,0 +1,21 @@
+#ifndef _BMC150_ACCEL_H_
+#define _BMC150_ACCEL_H_
+
+struct regmap;
+
+enum {
+ bmc150,
+ bmi055,
+ bma255,
+ bma250e,
+ bma222e,
+ bma280,
+};
+
+int bmc150_accel_core_probe(struct device *dev, struct regmap *regmap, int irq,
+ const char *name, int chip_id,
+ bool block_supported);
+int bmc150_accel_core_remove(struct device *dev);
+extern const struct dev_pm_ops bmc150_accel_pm_ops;
+
+#endif /* _BMC150_ACCEL_H_ */
--
2.4.6