linux-kernel - Re: [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton

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Date:   Thu, 9 Jan 2020 17:13:45 +0100
From:   Mauro Carvalho Chehab <mchehab@...nel.org>
To:     "Daniel W. S. Almeida" <dwlsalmeida@...il.com>
Cc:     sean@...s.org, tglx@...utronix.de, gregkh@...uxfoundation.org,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        skhan@...uxfoundation.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: Re: [PATCH 1/1] media: dvb_dummy_tuner: implement driver skeleton

Em Thu,  9 Jan 2020 12:24:08 -0300
"Daniel W. S. Almeida" <dwlsalmeida@...il.com> escreveu:

> From: "Daniel W. S. Almeida" <dwlsalmeida@...il.com>
> 
> Implement the skeleton for the tuner driver in a separate file.
> 
> Signed-off-by: Daniel W. S. Almeida <dwlsalmeida@...il.com>
> ---
>  drivers/media/tuners/Kconfig           |   7 ++
>  drivers/media/tuners/Makefile          |   1 +
>  drivers/media/tuners/dvb_dummy_tuner.c | 153 +++++++++++++++++++++++++
>  drivers/media/tuners/dvb_dummy_tuner.h |  20 ++++
>  4 files changed, 181 insertions(+)
>  create mode 100644 drivers/media/tuners/dvb_dummy_tuner.c
>  create mode 100644 drivers/media/tuners/dvb_dummy_tuner.h
> 
> diff --git a/drivers/media/tuners/Kconfig b/drivers/media/tuners/Kconfig
> index e104bb7766e1..efa1591fe0ae 100644
> --- a/drivers/media/tuners/Kconfig
> +++ b/drivers/media/tuners/Kconfig
> @@ -296,4 +296,11 @@ config MEDIA_TUNER_QM1D1B0004
>  	default m if !MEDIA_SUBDRV_AUTOSELECT
>  	help
>  	  Sharp QM1D1B0004 ISDB-S tuner driver.
> +
> +config MEDIA_TUNER_DVB_DUMMY_TUNER
> +	tristate "Dummy tuner"
> +	depends on MEDIA_SUPPORT && I2C

> +	default m if !MEDIA_SUBDRV_AUTOSELECT

Actually, this is a dummy driver. It should not be auto-selected, as no
real hardware depends on it. We don't want production distros to come with
those test drivers.

When we add a bridge driver (let's say we call it DVB_DUMMY_BRIDGE), then
what we could do here would be something like:

	depends on DVB_DUMMY_BRIDGE
	default y

Cheers,
Mauro