[yocto] [PATCH][meta-raspberrypi 1/2] raspberrypi3: serial console

[Trevor Woerner]

On Mon 2016-04-04 @ 04:32:41 PM, Gary Thomas wrote:
> On 04/04/2016 03:24 PM, Trevor Woerner wrote:
> >The serial console on the Raspberry Pi 3 is located at /dev/ttyS0 and not
> >/dev/ttyAMA0.
> >
> >Signed-off-by: Trevor Woerner <twoerner at gmail.com>
> >---
> >  conf/machine/raspberrypi3.conf | 2 ++
> >  1 file changed, 2 insertions(+)
> >
> >diff --git a/conf/machine/raspberrypi3.conf b/conf/machine/raspberrypi3.conf
> >index 1b73f2f..2c3df41 100644
> >--- a/conf/machine/raspberrypi3.conf
> >+++ b/conf/machine/raspberrypi3.conf
> >@@ -7,3 +7,5 @@ MACHINEOVERRIDES = "raspberrypi2:${MACHINE}"
> >  MACHINE_EXTRA_RRECOMMENDS += "linux-firmware-brcm43430"
> >
> >  include conf/machine/raspberrypi2.conf
> >+
> >+SERIAL_CONSOLE_raspberrypi3 = "115200 ttyS0"
> >
> 
> Why the _raspberrypi3 modifier?  Wouldn't SERIAL_CONSOLE = "115200 ttyS0" do?

...because the raspi3 MACHINE just basically includes/requires the raspi2
MACHINE, and the raspi2 MACHINE includes/requires include/rpi-base.inc, and
it's in rpi-base.inc that we find the SERIAL_CONSOLE definition.

Originally I had pulled out the SERIAL_CONSOLE from rpi-base and added it to
each of the raspi MACHINES, 3 of which were the same (AMA0) and one was ttyS0.
Then, looking over the patch set, I thought it would be cleaner to just keep
everything as it was and only add the ttyS0 to the raspi3 MACHINE (which
requires the override).

> 
> -- 
> ------------------------------------------------------------
> Gary Thomas                 |  Consulting for the
> MLB Associates              |    Embedded world
> ------------------------------------------------------------
> -- 
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