Re: CONFIG_KEYBOARD_GPIO for debian linux-image-rpi
On Mon, Aug 07, 2023 at 01:05:06AM +0200, Pali Rohár wrote:
> On Saturday 15 July 2023 10:50:42 Pali Rohár wrote:
> > On Saturday 15 July 2023 10:31:53 Salvatore Bonaccorso wrote:
> > > Hi,
> > >
> > > Let's loop in the Debian kernel team.
>
> Hi, any opinion there?
>
> > > On Fri, Jul 14, 2023 at 10:51:19PM +0200, Pali Rohár wrote:
> > > > Hello! I'm not sure who to ask about this issue but you are the last
> > > > person who modified linux-image-rpi debian package for bookworm.
> > > >
> > > > I have done clean install of bookworm for raspberrypi (armel, rev1b) and
> > > > I figured out that kernel does not contain CONFIG_KEYBOARD_GPIO anymore.
> > > >
> > > > $ uname -a
> > > > Linux raspberrypi 6.1.0-10-rpi #1 Debian 6.1.37-1 (2023-07-03) armv6l GNU/Linux
> > > >
> > > > $ grep CONFIG_KEYBOARD_GPIO /boot/config-6.1.0-10-rpi
> > > > # CONFIG_KEYBOARD_GPIO is not set
> > > > # CONFIG_KEYBOARD_GPIO_POLLED is not set
> > > >
> > > > So any gpio based keyboard on raspberry pi does not work. Personally I'm
> > > > using shutdown gpio button and I read more forums that lot of other
> > > > people are using gpio button for shutdown action too. So I think that in
> > > > raspberrypi kernel specific package, this driver can be useful to have.
> > > >
> > > > It there any reason why CONFIG_KEYBOARD_GPIO is disabled in bookworm
> > > > kernel from linux-image-rpi package? And if not, would it be possible to
> > > > enable this driver?
> > >
> > > I do not think there is any special reason for that, and just might be
> > > enabled for the rpi specific config, let's see what our arm* porters
> > > say. And if nothing speaks about it we might top-down (in the upper
> > > suites first, then maybe down to bookworm) enable it.
> >
> > Ok, thank you for information. Just to note that lot of 32-bit and
> > 64-bit ARM boards also use CONFIG_KEYBOARD_GPIO (for example run
> > git grep gpio-keys arch/arm{,64}/boot/dts), so maybe also other
> > configurations than rpi can benefit from having this driver enabled.
> >
> > I have looked at my another debian system running on 64-bit ARM and in
> > older bullseye's kernel linux-image-5.10.0-23-arm64 package there is
> > CONFIG_KEYBOARD_GPIO driver, see:
> >
> > $ grep CONFIG_KEYBOARD_GPIO /boot/config-5.10.0-23-arm64
> > CONFIG_KEYBOARD_GPIO=m
> > # CONFIG_KEYBOARD_GPIO_POLLED is not set
> >
> > > > CONFIG_KEYBOARD_GPIO is tristate symbol, so if there is space problem,
> > > > it can be enabled as loadable module and it would be loaded ondemand
> > > > only when needed.
> > >
> > > In case of yes to above question, it should be enabled as loadable
> > > module.
> > >
> > > Thanks for raising it.
Uwe, Vagrant, comments from you arm* porters? :) .
Regards,
Salvatore
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