How to modify u-boot in Root File System rootfs.ext2.gz.u-boot ?

How to modify u-boot in Root File System rootfs.ext2.gz.u-boot ?

[Jack lemon]

Hi everybody,

I worked with P1022DS-PB and then designed my custom board according to its
documents. For sd card I adjust u-boot to 115200 baud rate and compile it
with ELDK independently. However in Nor-flash we haven't u-boot.bin
independently. For Nor-Flash I need to adjust baud rate in .ext2.gz.u-boot
image, because for Nor-Flash only kernel,rootfs,dtb files are needed.
How can I modify u-boot in fsl-image-minimal-p1022ds.ext2.gz.u-boot for
adjusting baud rate to 115200?

Re: How to modify u-boot in Root File System rootfs.ext2.gz.u-boot ?

[Jack Lemon]

It wasn't any help??!! really??!!

Re: How to modify u-boot in Root File System rootfs.ext2.gz.u-boot ?

[Stefano Babic]

On 16/11/2013 16:24, Jack lemon wrote:
> Hi everybody,
> 
> I worked with P1022DS-PB and then designed my custom board according to its
> documents. For sd card I adjust u-boot to 115200 baud rate and compile it
> with ELDK independently. However in Nor-flash we haven't u-boot.bin
> independently. For Nor-Flash I need to adjust baud rate in .ext2.gz.u-boot
> image, because for Nor-Flash only kernel,rootfs,dtb files are needed.
> How can I modify u-boot in fsl-image-minimal-p1022ds.ext2.gz.u-boot for
> adjusting baud rate to 115200?

Is it not enough to add SERIAL_CONSOLE = "115200 ttyS0" (or which serial
you use as console) to your machine conf ?

Best regards,
Stefano Babic

-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic@denx.de
=====================================================================

Re: How to modify u-boot in Root File System rootfs.ext2.gz.u-boot ?

[Jack Lemon]

Stefano Babic <sbabic@...> writes:


> Is it not enough to add SERIAL_CONSOLE = "115200 ttyS0" (or which serial
> you use as console) to your machine conf ?
> 
> Best regards,
> Stefano Babic
> 

Thank you Stefano for your reply.
Does it not any need to edit u-boot source code? just adding SERIAL_CONSOLE
= "115200 ttyS0" to local.conf?

Re: How to modify u-boot in Root File System rootfs.ext2.gz.u-boot ?

[Stefano Babic]

On 19/11/2013 10:59, Jack Lemon wrote:
> Stefano Babic <sbabic@...> writes:
> 
> 
>> Is it not enough to add SERIAL_CONSOLE = "115200 ttyS0" (or which serial
>> you use as console) to your machine conf ?
>>
>> Best regards,
>> Stefano Babic
>>
> 
> Thank you Stefano for your reply.
> Does it not any need to edit u-boot source code? just adding SERIAL_CONSOLE
> = "115200 ttyS0" to local.conf?

You asked to change your rootfs (initrd, I presume)
fsl-image-minimal-p1022ds.ext2.gz.u-boot, and setting SERIAL_CONSOLE
adjusts the parameters for inittab.

If you want to change u-boot as well (but this is outside
fsl-image-minimal-*) and you do not want to compile it outside Yocto,
you have to put the patch you already have in your bsp directory and
adjust your u-boot receipe.

Best regards
Stefano Babic

-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic@denx.de
=====================================================================

Re: How to modify u-boot in Root File System rootfs.ext2.gz.u-boot ?

[Jack]

Stefano Babic <sbabic@...> writes:

> 
> On 19/11/2013 10:59, Jack Lemon wrote:
> > Stefano Babic <sbabic <at> ...> writes:
> > 
> > 
> >> Is it not enough to add SERIAL_CONSOLE = "115200 ttyS0" (or which serial
> >> you use as console) to your machine conf ?
> >>
> >> Best regards,
> >> Stefano Babic
> >>
> > 
> > Thank you Stefano for your reply.
> > Does it not any need to edit u-boot source code? just adding SERIAL_CONSOLE
> > = "115200 ttyS0" to local.conf?
> 
> You asked to change your rootfs (initrd, I presume)
> fsl-image-minimal-p1022ds.ext2.gz.u-boot, and setting SERIAL_CONSOLE
> adjusts the parameters for inittab.
> 
> If you want to change u-boot as well (but this is outside
> fsl-image-minimal-*) and you do not want to compile it outside Yocto,
> you have to put the patch you already have in your bsp directory and
> adjust your u-boot receipe.
> 
> Best regards
> Stefano Babic
> 

For Nor-Flash we have only three files(kernel,rootfs,dtb). Where is u-boot?
I think it is inside the fsl-image-minimal-p1022ds.ext2.gz.u-boot rootfs
file. Is it true? 

So, for modifying u-boot to adujst serial boaudrate, I understand that I can
add SERIAL_CONSOLE = "115200 ttyS0" to my local.conf according to your reply
and it doesnt need to modify u-boot source code.

Am I in the right place?

Re: How to modify u-boot in Root File System rootfs.ext2.gz.u-boot ?

[Stefano Babic]

Hi Jack,

On 19/11/2013 12:25, Jack wrote:

> For Nor-Flash we have only three files(kernel,rootfs,dtb). Where is u-boot?
> I think it is inside the fsl-image-minimal-p1022ds.ext2.gz.u-boot rootfs
> file. Is it true? 

I do not think so, but you are the best to answer this question: unzip
the file and check inside.

However, even if it contains a u-boot.bin or whatever is your u-boot
file, you have to extract it to write the bootloader at the right address.

In most cases, you will see a separate image for u-boot in
tmp/deploy/images diurectory.

> 
> So, for modifying u-boot to adujst serial boaudrate,

No. To modify the serial console under linux.

> I understand that I can
> add SERIAL_CONSOLE = "115200 ttyS0" to my local.conf according to your reply

See Robert reply. SERIAL_CONSOLE is deprecated, uses SERIAL_CONSOLES
instead.

> and it doesnt need to modify u-boot source code.
> 
> Am I in the right place?

Mmmhh..there is something missing. Usually you have a separate file for
u-boot. Of course, if u-boot is part of the filesystem, you cannot use
for a first installation because u-boot must be copied at a specific
address.

Best regards,
Stefano Babic

-- 
=====================================================================
DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic@denx.de
=====================================================================

Re: How to modify u-boot in Root File System rootfs.ext2.gz.u-boot ?

[jack lemon]

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Thanks a lot for your answers Stefano,

I put the patch in my bsp directory and adjust my u-boot receipe.


On Tue, Nov 19, 2013 at 3:40 PM, Stefano Babic <sbabic@denx.de> wrote:

> Hi Jack,
>
> On 19/11/2013 12:25, Jack wrote:
>
> > For Nor-Flash we have only three files(kernel,rootfs,dtb). Where is
> u-boot?
> > I think it is inside the fsl-image-minimal-p1022ds.ext2.gz.u-boot rootfs
> > file. Is it true?
>
> I do not think so, but you are the best to answer this question: unzip
> the file and check inside.
>
> However, even if it contains a u-boot.bin or whatever is your u-boot
> file, you have to extract it to write the bootloader at the right address.
>
> In most cases, you will see a separate image for u-boot in
> tmp/deploy/images diurectory.
>
> >
> > So, for modifying u-boot to adujst serial boaudrate,
>
> No. To modify the serial console under linux.
>
> > I understand that I can
> > add SERIAL_CONSOLE = "115200 ttyS0" to my local.conf according to your
> reply
>
> See Robert reply. SERIAL_CONSOLE is deprecated, uses SERIAL_CONSOLES
> instead.
>
> > and it doesnt need to modify u-boot source code.
> >
> > Am I in the right place?
>
> Mmmhh..there is something missing. Usually you have a separate file for
> u-boot. Of course, if u-boot is part of the filesystem, you cannot use
> for a first installation because u-boot must be copied at a specific
> address.
>

Best regards,
> Stefano Babic
>
> --
> =====================================================================
> DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sbabic@denx.de
> =====================================================================
>

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Re: How to modify u-boot in Root File System rootfs.ext2.gz.u-boot ?

[Robert P. J. Day]

On Tue, 19 Nov 2013, Jack Lemon wrote:

> Stefano Babic <sbabic@...> writes:
>
>
> > Is it not enough to add SERIAL_CONSOLE = "115200 ttyS0" (or which serial
> > you use as console) to your machine conf ?
> >
> > Best regards,
> > Stefano Babic
> >
>
> Thank you Stefano for your reply.
> Does it not any need to edit u-boot source code? just adding SERIAL_CONSOLE
> = "115200 ttyS0" to local.conf?

  the current documentation states that SERIAL_CONSOLE has been
deprecated in favour of the newer SERIAL_CONSOLES:

http://www.yoctoproject.org/docs/latest/ref-manual/ref-manual.html#var-SERIAL_CONSOLE

rday

-- 

========================================================================
Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
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