Re: OpenBMC on Raspberry PI 3.

["Yi TZ Li" <shliyi@cn.ibm.com>]

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Javier,

Andrew has mentioned the cause of the bug.

When I added the RaspberryPi configure to OpenBMC, I referred to
configuration of other boards, like:
"meta-openbmc-machines/meta-evb/meta-evb-aspeed/meta-evb-ast2500/conf", you
might also refer to other working machines.

The original target was to build an OpenBMC image for RaspberryPi, but I
never tested on a real hardware.
More work is required to run OpenBMC on a Raspberry Pi.

The "meta-phosphor" layer has been changed since that time, we need to
update RaspberryPi configurations accordingly.

Thanks,
-Yi

> From: Andrew Jeffery <andrew@aj.id.au>
> To: Javier Romero <xavinux@gmail.com>
> Cc: OpenBMC Maillist <openbmc@lists.ozlabs.org>
> Date: 09/10/2017 02:41 PM
> Subject: Re: OpenBMC on Raspberry PI 3.
> Sent by: "openbmc" <openbmc-bounces+shliyi=cn.ibm.com@lists.ozlabs.org>
>
> On Sun, 2017-10-08 at 23:57 -0300, Javier Romero wrote:
> > Andrew,
> >
> > Thans for your answer.
> >
> > Bug reported: https://github.com/openbmc/openbmc/issues/2434
> >
> > I`d like to try to cook up a patch, but do I need to know a specific
> > language programming to do this ?
>
> Hmm, good question. This is probably a bug in how a bitbake
> configuration/recipe configures the kernel. As such I'd suggest getting a
> handle on Yocto, which is the build and configuration system we
use.Here's the
> quick start guide:
>
>
http://www.yoctoproject.org/docs/2.1/yocto-project-qs/yocto-project-qs.html
>
> There's also a rather daunting Mega Manual, which is useful as a
reference
> (rather than reading the whole thing):
>
> http://www.yoctoproject.org/docs/2.1/mega-manual/mega-manual.html
>
> Back to the bug itself, from the output that you gave I expect it's some
issue
> with the following directive:
>
> https://github.com/openbmc/openbmc/blob/master/meta-phosphor/conf/
> distro/openbmc-phosphor.conf#L57
>
> i.e. the issue is that that linux-raspberrypi (the kernel recipe used for
the
> raspberry pi[1][2]) doesn't have a 'phosphor-gpio-keys' feature. The
implicit
> assumption is that the configuration will be using the linux-obmc
> tree[3][4][5], which
> is our fork of the kernel (primarily for Aspeed SoC support).
>
> More generally, knowledge of Python (Yocto/bitbake, some OpenBMC
userspace), C
> (u-boot, kernel, qemu, also requires a some comfort with assembler)
> and C++ (most
> of the phosphor reference userspace applications) is useful.
>
> Hope that helps.
>
> Andrew
>
> [1] https://github.com/openbmc/openbmc/blob/
> 4f2d85233d23eedaf1d4846d3d861ba28bc49b00/import-layers/meta-
> raspberrypi/recipes-kernel/linux/linux-raspberrypi_4.4.bb
> [2] https://github.com/openbmc/openbmc/blob/
> 4f2d85233d23eedaf1d4846d3d861ba28bc49b00/import-layers/meta-
> raspberrypi/recipes-kernel/linux/linux-raspberrypi.inc
> [3] https://github.com/openbmc/openbmc/blob/
> 4f2cddf103aaca6df26ddb766655fdf49c56a6ae/meta-phosphor/common/
> recipes-kernel/linux/linux-obmc_4.10.bb
> [4] https://github.com/openbmc/openbmc/blob/
> 4f2cddf103aaca6df26ddb766655fdf49c56a6ae/meta-phosphor/common/
> recipes-kernel/linux/linux-obmc.inc[attachment "signature.asc"
> deleted by Yi TZ Li/China/IBM]

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