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From: Angelo <s104259@yahoo•it>
To: linuxppc-embedded@ozlabs•org
Subject: Serial console on board based on Lite5200b
Date: Fri, 7 Nov 2008 12:10:17 +0000 (GMT)	[thread overview]
Message-ID: <31090.73221.qm@web23104.mail.ird.yahoo.com> (raw)

Hi, I have a board based on the Lite5200b, except that the serial console i=
s on PSC4 instead of PSC1.=20

Using the a custom U-boot (1.2.0) and kernel 2.6.21 (compiled for powerpc),=
 I managed to get U-boot to output on the console on PSC4, but the kernel
does not.

I had just modified lite5200b.dts in some points:

1- My memory is 128Mb
2- I don't need eth,mdio,ata so I had commented
3- Enable PSC4
4- Added the chosen node:

chosen {
      linux,stdout-path =3D "/soc5200@f0000000/serial@2600";
      bootargs =3D "console=3DttyPSC4,115200";=20
};

Debugging my board i notified that u-boot read & modify the device tree blo=
b adding the chosen node:
chosen{                                                                   =
=20
  name =3D "chosen";                                                       =
=20
  bootargs =3D "console=3DttyPSC3";
  linux,platform =3D <600>;
  linux,initrd-start =3D <7e2e000>;
  linux,initrd-end =3D <7f0fbf2>;
  linux,stdout-path =3D "/soc5200@f0000000/serial@2600";
};=20

I follow step by step the kernel start procedure.. and I notify that in set=
up_arch funtion is called find_legacy_serial_ports, but when is done if(leg=
acy_serial_console >=3D 0)=20
legacy_serial_console is equal to -1.

However, it is not sufficient.  What am I missing?

Thank you!
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rso di fotografia di Gazzetta dello sport:=0Ahttp://www.flickr.com/groups/i=
ofotografoevideo

next             reply	other threads:[~2008-11-07 12:16 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-07 12:10 Angelo [this message]
2008-11-13 22:12 ` R: Serial console on board based on Lite5200b Angelo

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