Re: [PATCH v4 1/2] iio: bmg160: Separate i2c and core driver

From: Markus Pargmann
Date: Mon Sep 14 2015 - 10:26:21 EST

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Hi Jonathon,

Sorry for the late response I was on vacation.

On Mon, Aug 31, 2015 at 05:05:11PM +0100, Jonathan Cameron wrote:
> On 19/08/15 13:12, Markus Pargmann wrote:
> > This patch separates the core driver using regmap and the i2c driver
> > which creates the i2c regmap. Also in the Kconfig file BMG160 and
> > BMG160_I2C are separate now.
> >
> > Signed-off-by: Markus Pargmann <mpa@xxxxxxxxxxxxxx>
> Hi Markus,
>
> This didn't exactly go in cleanly.
> THe resulting core driver had no author or licence block
> so I put that back from the original. Also as bmg160.h
> was not included in that driver, All sorts of fun warnings
> about non static, not exported symbols came up. Added
> in the #include "bmg160.h"
>
> There was also some fuzz in the driver. Could you check it
> went in correctly for me?

Thanks. I just looked at it and it seems to be correct.

Best Regards,

Markus

>
> Applied to the togreg branch of iio.git - initially pushed out
> as testing for the autobuilders to play with it.
>
> I also took the view that the changes in how it was built
> were not an issue for taking Srinivas' previous reviewed-by
> and so applied that as well.
>
> Thanks,
>
> Jonathan
>
> > ---
> > drivers/iio/gyro/Kconfig | 15 ++++--
> > drivers/iio/gyro/Makefile | 3 +-
> > drivers/iio/gyro/bmg160.h | 10 ++++
> > drivers/iio/gyro/{bmg160.c => bmg160_core.c} | 79 +++++-----------------------
> > drivers/iio/gyro/bmg160_i2c.c | 71 +++++++++++++++++++++++++
> > 5 files changed, 107 insertions(+), 71 deletions(-)
> > create mode 100644 drivers/iio/gyro/bmg160.h
> > rename drivers/iio/gyro/{bmg160.c => bmg160_core.c} (94%)
> > create mode 100644 drivers/iio/gyro/bmg160_i2c.c
> >
> > diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
> > index cf82d74139a2..94526b13d49f 100644
> > --- a/drivers/iio/gyro/Kconfig
> > +++ b/drivers/iio/gyro/Kconfig
> > @@ -52,16 +52,21 @@ config ADXRS450
> >
> > config BMG160
> > tristate "BOSCH BMG160 Gyro Sensor"
> > - depends on I2C
> > + depends on (I2C || SPI_MASTER)
> > select IIO_BUFFER
> > select IIO_TRIGGERED_BUFFER
> > - select REGMAP_I2C
> > + select BMG160_I2C if (I2C)
> > help
> > - Say yes here to build support for Bosch BMG160 Tri-axis Gyro Sensor
> > - driver. This driver also supports BMI055 gyroscope.
> > + Say yes here to build support for BOSCH BMG160 Tri-axis Gyro Sensor
> > + driver connected via I2C or SPI. This driver also supports BMI055
> > + gyroscope.
> >
> > This driver can also be built as a module. If so, the module
> > - will be called bmg160.
> > + will be called bmg160_i2c.
> > +
> > +config BMG160_I2C
> > + tristate
> > + select REGMAP_I2C
> >
> > config HID_SENSOR_GYRO_3D
> > depends on HID_SENSOR_HUB
> > diff --git a/drivers/iio/gyro/Makefile b/drivers/iio/gyro/Makefile
> > index f46341b39139..608401041550 100644
> > --- a/drivers/iio/gyro/Makefile
> > +++ b/drivers/iio/gyro/Makefile
> > @@ -8,7 +8,8 @@ obj-$(CONFIG_ADIS16130) += adis16130.o
> > obj-$(CONFIG_ADIS16136) += adis16136.o
> > obj-$(CONFIG_ADIS16260) += adis16260.o
> > obj-$(CONFIG_ADXRS450) += adxrs450.o
> > -obj-$(CONFIG_BMG160) += bmg160.o
> > +obj-$(CONFIG_BMG160) += bmg160_core.o
> > +obj-$(CONFIG_BMG160_I2C) += bmg160_i2c.o
> >
> > obj-$(CONFIG_HID_SENSOR_GYRO_3D) += hid-sensor-gyro-3d.o
> >
> > diff --git a/drivers/iio/gyro/bmg160.h b/drivers/iio/gyro/bmg160.h
> > new file mode 100644
> > index 000000000000..72db723c8fb6
> > --- /dev/null
> > +++ b/drivers/iio/gyro/bmg160.h
> > @@ -0,0 +1,10 @@
> > +#ifndef BMG160_H_
> > +#define BMG160_H_
> > +
> > +extern const struct dev_pm_ops bmg160_pm_ops;
> > +
> > +int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
> > + const char *name);
> > +void bmg160_core_remove(struct device *dev);
> > +
> > +#endif /* BMG160_H_ */
> > diff --git a/drivers/iio/gyro/bmg160.c b/drivers/iio/gyro/bmg160_core.c
> > similarity index 94%
> > rename from drivers/iio/gyro/bmg160.c
> > rename to drivers/iio/gyro/bmg160_core.c
> > index 39df64fb4262..7366cb9f613d 100644
> > --- a/drivers/iio/gyro/bmg160.c
> > +++ b/drivers/iio/gyro/bmg160_core.c
> > @@ -13,7 +13,6 @@
> > */
> >
> > #include <linux/module.h>
> > -#include <linux/i2c.h>
> > #include <linux/interrupt.h>
> > #include <linux/delay.h>
> > #include <linux/slab.h>
> > @@ -30,7 +29,6 @@
> > #include <linux/iio/triggered_buffer.h>
> > #include <linux/regmap.h>
> >
> > -#define BMG160_DRV_NAME "bmg160"
> > #define BMG160_IRQ_NAME "bmg160_event"
> > #define BMG160_GPIO_NAME "gpio_int"
> >
> > @@ -137,12 +135,6 @@ static const struct {
> > { 133, BMG160_RANGE_250DPS},
> > { 66, BMG160_RANGE_125DPS} };
> >
> > -struct regmap_config bmg160_regmap_i2c_conf = {
> > - .reg_bits = 8,
> > - .val_bits = 8,
> > - .max_register = 0x3f
> > -};
> > -
> > static int bmg160_set_mode(struct bmg160_data *data, u8 mode)
> > {
> > int ret;
> > @@ -996,31 +988,22 @@ static const char *bmg160_match_acpi_device(struct device *dev)
> > return dev_name(dev);
> > }
> >
> > -static int bmg160_probe(struct i2c_client *client,
> > - const struct i2c_device_id *id)
> > +int bmg160_core_probe(struct device *dev, struct regmap *regmap, int irq,
> > + const char *name)
> > {
> > struct bmg160_data *data;
> > struct iio_dev *indio_dev;
> > int ret;
> > - const char *name = NULL;
> > - struct regmap *regmap;
> > - struct device *dev = &client->dev;
> > -
> > - regmap = devm_regmap_init_i2c(client, &bmg160_regmap_i2c_conf);
> > - if (IS_ERR(regmap)) {
> > - dev_err(&client->dev, "Failed to register i2c regmap %d\n",
> > - (int)PTR_ERR(regmap));
> > - return PTR_ERR(regmap);
> > - }
> >
> > - 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);
> > dev_set_drvdata(dev, indio_dev);
> > data->dev = dev;
> > - data->irq = client->irq;
> > + data->irq = irq;
> > + data->regmap = regmap;
> >
> > ret = bmg160_chip_init(data);
> > if (ret < 0)
> > @@ -1028,9 +1011,6 @@ static int bmg160_probe(struct i2c_client *client,
> >
> > mutex_init(&data->mutex);
> >
> > - if (id)
> > - name = id->name;
> > -
> > if (ACPI_HANDLE(dev))
> > name = bmg160_match_acpi_device(dev);
> >
> > @@ -1125,15 +1105,16 @@ err_trigger_unregister:
> >
> > return ret;
> > }
> > +EXPORT_SYMBOL_GPL(bmg160_core_probe);
> >
> > -static int bmg160_remove(struct i2c_client *client)
> > +void bmg160_core_remove(struct device *dev)
> > {
> > - struct iio_dev *indio_dev = i2c_get_clientdata(client);
> > + struct iio_dev *indio_dev = dev_get_drvdata(dev);
> > struct bmg160_data *data = iio_priv(indio_dev);
> >
> > - pm_runtime_disable(&client->dev);
> > - pm_runtime_set_suspended(&client->dev);
> > - pm_runtime_put_noidle(&client->dev);
> > + pm_runtime_disable(dev);
> > + pm_runtime_set_suspended(dev);
> > + pm_runtime_put_noidle(dev);
> >
> > iio_device_unregister(indio_dev);
> > iio_triggered_buffer_cleanup(indio_dev);
> > @@ -1146,9 +1127,8 @@ static int bmg160_remove(struct i2c_client *client)
> > mutex_lock(&data->mutex);
> > bmg160_set_mode(data, BMG160_MODE_DEEP_SUSPEND);
> > mutex_unlock(&data->mutex);
> > -
> > - return 0;
> > }
> > +EXPORT_SYMBOL_GPL(bmg160_core_remove);
> >
> > #ifdef CONFIG_PM_SLEEP
> > static int bmg160_suspend(struct device *dev)
> > @@ -1210,40 +1190,9 @@ static int bmg160_runtime_resume(struct device *dev)
> > }
> > #endif
> >
> > -static const struct dev_pm_ops bmg160_pm_ops = {
> > +const struct dev_pm_ops bmg160_pm_ops = {
> > SET_SYSTEM_SLEEP_PM_OPS(bmg160_suspend, bmg160_resume)
> > SET_RUNTIME_PM_OPS(bmg160_runtime_suspend,
> > bmg160_runtime_resume, NULL)
> > };
> > -
> > -static const struct acpi_device_id bmg160_acpi_match[] = {
> > - {"BMG0160", 0},
> > - {"BMI055B", 0},
> > - {},
> > -};
> > -
> > -MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
> > -
> > -static const struct i2c_device_id bmg160_id[] = {
> > - {"bmg160", 0},
> > - {"bmi055_gyro", 0},
> > - {}
> > -};
> > -
> > -MODULE_DEVICE_TABLE(i2c, bmg160_id);
> > -
> > -static struct i2c_driver bmg160_driver = {
> > - .driver = {
> > - .name = BMG160_DRV_NAME,
> > - .acpi_match_table = ACPI_PTR(bmg160_acpi_match),
> > - .pm = &bmg160_pm_ops,
> > - },
> > - .probe = bmg160_probe,
> > - .remove = bmg160_remove,
> > - .id_table = bmg160_id,
> > -};
> > -module_i2c_driver(bmg160_driver);
> > -
> > -MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>");
> > -MODULE_LICENSE("GPL v2");
> > -MODULE_DESCRIPTION("BMG160 Gyro driver");
> > +EXPORT_SYMBOL_GPL(bmg160_pm_ops);
> > diff --git a/drivers/iio/gyro/bmg160_i2c.c b/drivers/iio/gyro/bmg160_i2c.c
> > new file mode 100644
> > index 000000000000..90126a5a7663
> > --- /dev/null
> > +++ b/drivers/iio/gyro/bmg160_i2c.c
> > @@ -0,0 +1,71 @@
> > +#include <linux/i2c.h>
> > +#include <linux/regmap.h>
> > +#include <linux/iio/iio.h>
> > +#include <linux/module.h>
> > +#include <linux/acpi.h>
> > +
> > +#include "bmg160.h"
> > +
> > +static const struct regmap_config bmg160_regmap_i2c_conf = {
> > + .reg_bits = 8,
> > + .val_bits = 8,
> > + .max_register = 0x3f
> > +};
> > +
> > +static int bmg160_i2c_probe(struct i2c_client *client,
> > + const struct i2c_device_id *id)
> > +{
> > + struct regmap *regmap;
> > + const char *name = NULL;
> > +
> > + regmap = devm_regmap_init_i2c(client, &bmg160_regmap_i2c_conf);
> > + if (IS_ERR(regmap)) {
> > + dev_err(&client->dev, "Failed to register i2c regmap %d\n",
> > + (int)PTR_ERR(regmap));
> > + return PTR_ERR(regmap);
> > + }
> > +
> > + if (id)
> > + name = id->name;
> > +
> > + return bmg160_core_probe(&client->dev, regmap, client->irq, name);
> > +}
> > +
> > +static int bmg160_i2c_remove(struct i2c_client *client)
> > +{
> > + bmg160_core_remove(&client->dev);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct acpi_device_id bmg160_acpi_match[] = {
> > + {"BMG0160", 0},
> > + {"BMI055B", 0},
> > + {},
> > +};
> > +
> > +MODULE_DEVICE_TABLE(acpi, bmg160_acpi_match);
> > +
> > +static const struct i2c_device_id bmg160_i2c_id[] = {
> > + {"bmg160", 0},
> > + {"bmi055_gyro", 0},
> > + {}
> > +};
> > +
> > +MODULE_DEVICE_TABLE(i2c, bmg160_i2c_id);
> > +
> > +static struct i2c_driver bmg160_i2c_driver = {
> > + .driver = {
> > + .name = "bmg160_i2c",
> > + .acpi_match_table = ACPI_PTR(bmg160_acpi_match),
> > + .pm = &bmg160_pm_ops,
> > + },
> > + .probe = bmg160_i2c_probe,
> > + .remove = bmg160_i2c_remove,
> > + .id_table = bmg160_i2c_id,
> > +};
> > +module_i2c_driver(bmg160_i2c_driver);
> > +
> > +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxxxxxxxx>");
> > +MODULE_LICENSE("GPL v2");
> > +MODULE_DESCRIPTION("BMG160 I2C Gyro driver");
> >
>
>

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