[yocto] [meta-raspberrypi][PATCH V2] Add initramfs support

[Andrei Gherzan]

On Tue, Feb 11, 2014 at 12:59 PM, Andrei Gherzan <andrei at gherzan.ro> wrote:

>
> Hello,
>
> On Mon, Feb 10, 2014 at 12:05 PM, Sebastien MENNETRIER <
> s.mennetrier at innotis.org> wrote:
>
>> Hi,
>>
>>
>> 2014-02-09 Andrei Gherzan <andrei at gherzan.ro>:
>>
>> Hi,
>>>
>>>
>>> On Fri, Jan 31, 2014 at 5:30 PM, Sébastien Mennetrier <
>>> s.mennetrier at innotis.org> wrote:
>>>
>>>> Permit to build an image with initramfs.
>>>>
>>>> Signed-off-by: Sébastien Mennetrier <s.mennetrier at innotis.org>
>>>> ---
>>>>  classes/sdcard_image-rpi.bbclass | 5 ++++-
>>>>  1 file changed, 4 insertions(+), 1 deletion(-)
>>>>
>>>> diff --git a/classes/sdcard_image-rpi.bbclass
>>>> b/classes/sdcard_image-rpi.bbclass
>>>> index 3ee4e94..815aaa9 100644
>>>> --- a/classes/sdcard_image-rpi.bbclass
>>>> +++ b/classes/sdcard_image-rpi.bbclass
>>>> @@ -26,6 +26,9 @@ inherit image_types
>>>>  # Set kernel and boot loader
>>>>  IMAGE_BOOTLOADER ?= "bcm2835-bootfiles"
>>>>
>>>> +# Set initramfs extension
>>>> +KERNEL_INITRAMFS ?= ""
>>>> +
>>>>
>>>
>>> I'm not sure how is this supposed to work. Could you please give more
>>> info? I haven't seen this defined anywhere else so it must be something
>>> custom you use.
>>>
>>
>> When you would build an initramfs image, you must set this 3 kernel
>> variables :
>>      # Set initramfs
>>      kernel_configure_variable BLK_DEV_INITRD y
>>      kernel_configure_variable INITRAMFS_SOURCE ""
>>      kernel_configure_variable RD_GZIP y
>>
>> And you must set INITRAMFS_IMAGE and INITRAMFS_IMAGE_BUNDLE variables.
>> These variables are used in kernel.bbclass from poky.
>>
>> The generated image name with initramfs feature is
>> ${KERNEL_IMAGETYPE}-initramfs-${MACHINE}.bin
>>
>> So you must set KERNEL_INITRAMFS in the machine.conf file with
>> "-initramfs" in order to use this image in the mcopy below.
>>
>>
>
> This was exactly my point. We need to document this somewhere (most
> probably in README). Could you please add a patch which does this?
>

Uh. And one more thing. This patch needs rebase on current master HEAD.
Could you please resend along with the README update patch?

Thanks in advance,
-- 
*Andrei Gherzan*
m: +40.744.478.414 |  f: +40.31.816.28.12
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