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Message-ID: <55E47B37.8010703@kernel.org>
Date: Mon, 31 Aug 2015 17:05:11 +0100
From: Jonathan Cameron <jic23@...nel.org>
To: Markus Pargmann <mpa@...gutronix.de>
Cc: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
Irina Tirdea <irina.tirdea@...el.com>,
Vlad Dogaru <vlad.dogaru@...el.com>, linux-iio@...r.kernel.org,
linux-kernel@...r.kernel.org, kernel@...gutronix.de
Subject: Re: [PATCH v4 1/2] iio: bmg160: Separate i2c and core driver
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@...gutronix.de>
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?
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@...ux.intel.com>");
> -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@...ux.intel.com>");
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("BMG160 I2C Gyro driver");
>
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