[yocto] thud, beaglebone-yocto.conf: SERIAL_CONSOLES setting

[Kevin Hao]

On Wed, Nov 07, 2018 at 08:33:51AM +0100, Heiko Schocher wrote:
> Hello Kevin, Robert,
> 
> Am 06.11.2018 um 09:10 schrieb Heiko Schocher:
> > Hello Kevin, Robert,
> > 
> > Am 05.11.2018 um 06:26 schrieb Kevin Hao:
> > > On Sun, Nov 04, 2018 at 12:10:00PM +0200, Robert Berger wrote:
> > > > Hi,
> > > > 
> > > > On 02.11.18 16:27, Khem Raj wrote:
> > > > > 
> > > > > omap serial is obsolete why does linux-yocto keeps using it.
> > > > > seondly, machine config should enable both consoles ttyO0 and ttyS0 if
> > > > > you know that at least one kernel is using ttyO0
> > > > > 
> > > > How about picking whatever works for you in the kernel conf and in machine
> > > > conf?
> > > > 
> > > > SERIAL_CONSOLES = "115200;ttyS0 115200;ttyO0"
> > > > SERIAL_CONSOLES_CHECK = "${SERIAL_CONSOLES}"
> > > > 
> > > > Like this on the first boot either ttyO0 or ttyS0 should be picked
> > > > automatically.
> > > 
> > > Yes, this is doable. Would you mind send a patch?
> > 
> > Sorry for answering so late... good hint, I missed SERIAL_CONSOLES_CHECK
> > 
> > I try this change and report, give me some time...
> 
> 
> diff --git a/meta-yocto-bsp/conf/machine/beaglebone-yocto.conf
> b/meta-yocto-bsp/conf/machine/beaglebone-yocto.conf
> index e911e75004..def3a2ae06 100644
> --- a/meta-yocto-bsp/conf/machine/beaglebone-yocto.conf
> +++ b/meta-yocto-bsp/conf/machine/beaglebone-yocto.conf
> @@ -20,7 +20,8 @@ WKS_FILE ?= "beaglebone-yocto.wks"
>  IMAGE_INSTALL_append = " kernel-devicetree kernel-image-zimage"
>  do_image_wic[depends] += "mtools-native:do_populate_sysroot dosfstools-native:do_populate_sysroot"
> 
> -SERIAL_CONSOLES = "115200;ttyO0"
> +SERIAL_CONSOLES = "115200;ttyS0 115200;ttyO0"
> +SERIAL_CONSOLES_CHECK = "${SERIAL_CONSOLES}"
> 
>  PREFERRED_PROVIDER_virtual/kernel ?= "linux-yocto"
>  PREFERRED_VERSION_linux-yocto ?= "4.18%"
> 
> and on my beagleboneblack linux kernels with 8250 serial driver enabled
> (console ttyS0) and kernel omap_serial driver enabled (console ttyO0)
> are booting.
> 
> Unfortunately it took me some time, until I realized that my settings
> in auto.conf do not work, because in beaglebone-yocto.conf
> 
> SERIAL_CONSOLES = "115200;ttyO0"
> 
> is set ... May a
> 
> SERIAL_CONSOLES ?= "115200;ttyS0 115200;ttyO0"
> 
> is friendlier ?

Yes, "?=" is better.

> 
> Should I send a formal patch?

Yes, please.

Thanks,
Kevin

> 
> bye,
> Heiko
> -- 
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
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