On Tue, Jun 21, 2011 at 01:09:15AM -0400, Nicolas Pitre wrote: > From: Nicolas Pitre <[email protected]> > > Some old bootloaders can't be updated to a device tree capable one, > yet they provide ATAGs with memory configuration, the ramdisk address, > the kernel cmdline string, etc. To allow a device tree enabled > kernel to be used with such bootloaders, it is necessary to convert those > ATAGs into FDT properties and fold them into the DTB appended to zImage. > > Currently the following ATAGs are converted: > > ATAG_CMDLINE > ATAG_MEM (up to 8 memory regions) > ATAG_INITRD2 > > If the corresponding information already exists in the appended DTB, it > is replaced, otherwise the required node is created to hold it. > > The code looks for ATAGs at the location pointed by the value of r2 upon > entry into the zImage code. If no ATAGs are found there, an attempt at > finding ATAGs at the typical 0x100 offset from start of RAM is made. > Otherwise the DTB is left unchanged. > > Thisstarted from an older patch from John Bonesio <[email protected]>, > with contributions from David Brown <[email protected]>. > > Signed-off-by: Nicolas Pitre <[email protected]> > ---
With this patch applied, I saw nothing coming from kernel on imx51 babbage serial port. -- Regards, Shawn _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
