linux-kernel - Re: [PATCH] iio: hid-sensors: select IIO_TRIGGERED_BUFFER under HID_SENSOR_IIO

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Date:   Thu, 15 Apr 2021 09:58:33 -0700
From:   Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     Alexandru Ardelean <aardelean@...iqon.com>,
        linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     jic23@...nel.org, linux@...iqon.com,
        Thomas Deutschmann <whissi@...too.org>
Subject: Re: [PATCH] iio: hid-sensors: select IIO_TRIGGERED_BUFFER under
 HID_SENSOR_IIO_TRIGGER

On Wed, 2021-04-14 at 11:49 +0300, Alexandru Ardelean wrote:
> During commit 067fda1c065ff ("iio: hid-sensors: move triggered buffer
> setup into hid_sensor_setup_trigger"), the
> iio_triggered_buffer_{setup,cleanup}() functions got moved under the
> hid-sensor-trigger module.
> 
> The above change works fine, if any of the sensors get built.
> However, when
> only the common hid-sensor-trigger module gets built (and none of the
> drivers), then the IIO_TRIGGERED_BUFFER symbol isn't
> selected/enforced.
> 
> Previously, each driver would enforce/select the IIO_TRIGGERED_BUFFER
> symbol. With this change the HID_SENSOR_IIO_TRIGGER (for the
> hid-sensor-trigger module) will enforce that IIO_TRIGGERED_BUFFER
> gets
> selected.
> 
> All HID sensor drivers select the HID_SENSOR_IIO_TRIGGER symbol. So,
> this
> change removes the IIO_TRIGGERED_BUFFER enforcement from each driver.
> 
> Fixes: 067fda1c065ff ("iio: hid-sensors: move triggered buffer setup
> into hid_sensor_setup_trigger")
> Reported-by: Thomas Deutschmann <whissi@...too.org>
> Cc: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>
> Signed-off-by: Alexandru Ardelean <aardelean@...iqon.com>
Acked-by: Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>

> ---
>  drivers/iio/accel/Kconfig              | 1 -
>  drivers/iio/common/hid-sensors/Kconfig | 1 +
>  drivers/iio/gyro/Kconfig               | 1 -
>  drivers/iio/humidity/Kconfig           | 1 -
>  drivers/iio/light/Kconfig              | 2 --
>  drivers/iio/magnetometer/Kconfig       | 1 -
>  drivers/iio/orientation/Kconfig        | 2 --
>  drivers/iio/pressure/Kconfig           | 1 -
>  drivers/iio/temperature/Kconfig        | 1 -
>  9 files changed, 1 insertion(+), 10 deletions(-)
> 
> diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
> index cceda3cecbcf..8b1723635cce 100644
> --- a/drivers/iio/accel/Kconfig
> +++ b/drivers/iio/accel/Kconfig
> @@ -229,7 +229,6 @@ config DMARD10
>  config HID_SENSOR_ACCEL_3D
>  	depends on HID_SENSOR_HUB
>  	select IIO_BUFFER
> -	select IIO_TRIGGERED_BUFFER
>  	select HID_SENSOR_IIO_COMMON
>  	select HID_SENSOR_IIO_TRIGGER
>  	tristate "HID Accelerometers 3D"
> diff --git a/drivers/iio/common/hid-sensors/Kconfig
> b/drivers/iio/common/hid-sensors/Kconfig
> index 24d492567336..2a3dd3b907be 100644
> --- a/drivers/iio/common/hid-sensors/Kconfig
> +++ b/drivers/iio/common/hid-sensors/Kconfig
> @@ -19,6 +19,7 @@ config HID_SENSOR_IIO_TRIGGER
>  	tristate "Common module (trigger) for all HID Sensor IIO
> drivers"
>  	depends on HID_SENSOR_HUB && HID_SENSOR_IIO_COMMON &&
> IIO_BUFFER
>  	select IIO_TRIGGER
> +	select IIO_TRIGGERED_BUFFER
>  	help
>  	  Say yes here to build trigger support for HID sensors.
>  	  Triggers will be send if all requested attributes were read.
> diff --git a/drivers/iio/gyro/Kconfig b/drivers/iio/gyro/Kconfig
> index 5824f2edf975..20b5ac7ab66a 100644
> --- a/drivers/iio/gyro/Kconfig
> +++ b/drivers/iio/gyro/Kconfig
> @@ -111,7 +111,6 @@ config FXAS21002C_SPI
>  config HID_SENSOR_GYRO_3D
>  	depends on HID_SENSOR_HUB
>  	select IIO_BUFFER
> -	select IIO_TRIGGERED_BUFFER
>  	select HID_SENSOR_IIO_COMMON
>  	select HID_SENSOR_IIO_TRIGGER
>  	tristate "HID Gyroscope 3D"
> diff --git a/drivers/iio/humidity/Kconfig
> b/drivers/iio/humidity/Kconfig
> index 6549fcf6db69..2de5494e7c22 100644
> --- a/drivers/iio/humidity/Kconfig
> +++ b/drivers/iio/humidity/Kconfig
> @@ -52,7 +52,6 @@ config HID_SENSOR_HUMIDITY
>  	tristate "HID Environmental humidity sensor"
>  	depends on HID_SENSOR_HUB
>  	select IIO_BUFFER
> -	select IIO_TRIGGERED_BUFFER
>  	select HID_SENSOR_IIO_COMMON
>  	select HID_SENSOR_IIO_TRIGGER
>  	help
> diff --git a/drivers/iio/light/Kconfig b/drivers/iio/light/Kconfig
> index 33ad4dd0b5c7..917f9becf9c7 100644
> --- a/drivers/iio/light/Kconfig
> +++ b/drivers/iio/light/Kconfig
> @@ -256,7 +256,6 @@ config ISL29125
>  config HID_SENSOR_ALS
>  	depends on HID_SENSOR_HUB
>  	select IIO_BUFFER
> -	select IIO_TRIGGERED_BUFFER
>  	select HID_SENSOR_IIO_COMMON
>  	select HID_SENSOR_IIO_TRIGGER
>  	tristate "HID ALS"
> @@ -270,7 +269,6 @@ config HID_SENSOR_ALS
>  config HID_SENSOR_PROX
>  	depends on HID_SENSOR_HUB
>  	select IIO_BUFFER
> -	select IIO_TRIGGERED_BUFFER
>  	select HID_SENSOR_IIO_COMMON
>  	select HID_SENSOR_IIO_TRIGGER
>  	tristate "HID PROX"
> diff --git a/drivers/iio/magnetometer/Kconfig
> b/drivers/iio/magnetometer/Kconfig
> index 5d4ffd66032e..74ad5701c6c2 100644
> --- a/drivers/iio/magnetometer/Kconfig
> +++ b/drivers/iio/magnetometer/Kconfig
> @@ -95,7 +95,6 @@ config MAG3110
>  config HID_SENSOR_MAGNETOMETER_3D
>  	depends on HID_SENSOR_HUB
>  	select IIO_BUFFER
> -	select IIO_TRIGGERED_BUFFER
>  	select HID_SENSOR_IIO_COMMON
>  	select HID_SENSOR_IIO_TRIGGER
>  	tristate "HID Magenetometer 3D"
> diff --git a/drivers/iio/orientation/Kconfig
> b/drivers/iio/orientation/Kconfig
> index a505583cc2fd..396cbbb867f4 100644
> --- a/drivers/iio/orientation/Kconfig
> +++ b/drivers/iio/orientation/Kconfig
> @@ -9,7 +9,6 @@ menu "Inclinometer sensors"
>  config HID_SENSOR_INCLINOMETER_3D
>  	depends on HID_SENSOR_HUB
>  	select IIO_BUFFER
> -	select IIO_TRIGGERED_BUFFER
>  	select HID_SENSOR_IIO_COMMON
>  	select HID_SENSOR_IIO_TRIGGER
>  	tristate "HID Inclinometer 3D"
> @@ -20,7 +19,6 @@ config HID_SENSOR_INCLINOMETER_3D
>  config HID_SENSOR_DEVICE_ROTATION
>  	depends on HID_SENSOR_HUB
>  	select IIO_BUFFER
> -	select IIO_TRIGGERED_BUFFER
>  	select HID_SENSOR_IIO_COMMON
>  	select HID_SENSOR_IIO_TRIGGER
>  	tristate "HID Device Rotation"
> diff --git a/drivers/iio/pressure/Kconfig
> b/drivers/iio/pressure/Kconfig
> index 689b978db4f9..fc0d3cfca418 100644
> --- a/drivers/iio/pressure/Kconfig
> +++ b/drivers/iio/pressure/Kconfig
> @@ -79,7 +79,6 @@ config DPS310
>  config HID_SENSOR_PRESS
>  	depends on HID_SENSOR_HUB
>  	select IIO_BUFFER
> -	select IIO_TRIGGERED_BUFFER
>  	select HID_SENSOR_IIO_COMMON
>  	select HID_SENSOR_IIO_TRIGGER
>  	tristate "HID PRESS"
> diff --git a/drivers/iio/temperature/Kconfig
> b/drivers/iio/temperature/Kconfig
> index c5482983f568..f20ae3c963cb 100644
> --- a/drivers/iio/temperature/Kconfig
> +++ b/drivers/iio/temperature/Kconfig
> @@ -45,7 +45,6 @@ config HID_SENSOR_TEMP
>  	tristate "HID Environmental temperature sensor"
>  	depends on HID_SENSOR_HUB
>  	select IIO_BUFFER
> -	select IIO_TRIGGERED_BUFFER
>  	select HID_SENSOR_IIO_COMMON
>  	select HID_SENSOR_IIO_TRIGGER
>  	help