Re: Pandaboard ES

[Rui-Xiang Guo <rxg%lavabit.com@localhost>]

On Sat, Mar 29, 2025 at 09:36:11PM +0800, Rui-Xiang Guo wrote:
> On Tue, Mar 25, 2025 at 01:06:59PM +0800, Rui-Xiang Guo wrote:
> > On Fri, Mar 14, 2025 at 07:54:18PM +0800, Rui-Xiang Guo wrote:
> > > I am trying to bring the board to 10.0, and it looks better now:
> > > https://github.com/picohive/netbsd-pandaboard/blob/main/boot.log
> > > 
> > > The current problem - is there any proper method to pass a clock
> > > from omap4prcm to a9ptmr?
> > 
> > Eventually, the board works on 10.0:
> > https://dmesgd.nycbug.org/dmesgd?do=view&id=8298
> > 
> > The patches:
> > https://github.com/picohive/netbsd-pandaboard
> > 
> > And we need to update u-boot-pandaboard:
> > ===================================================================
> > RCS file: /cvsroot/pkgsrc/sysutils/u-boot-pandaboard/Makefile,v
> > retrieving revision 1.2
> > diff -u -p -r1.2 Makefile
> > --- Makefile    12 Aug 2021 07:25:59 -0000      1.2
> > +++ Makefile    25 Mar 2025 04:02:38 -0000
> > @@ -5,6 +5,8 @@ UBOOT_CONFIG=           omap4_panda_defconfig
> >  UBOOT_BIN=             u-boot.img
> >  UBOOT_BIN+=            MLO
> > 
> > +UBOOT_VERSION=         2021.01
> > +
> >  UBOOT_INSTALLBOOT_PLIST=       installboot.plist
> > 
> >  .include "../../sysutils/u-boot/u-boot-arm.mk"
> > 
> > Some known issues:
> > 1. a9ptmr manually obtains frequency, not sure if this is a good solution.
> > 2. armpmu failed to be attached, it seems to be a problem with dts.
> > 3. ti_prcm doesn't support multiple instances so we can get the last attached
> >    PRCM (CM2) clocks only, this causes tiwdt to not work.
> 
> Issue 3 should be my misunderstanding, tiwdt is attached if I comment out
> wd_timer3 clock in omap4_prcm.

Issue 1 is fixed by changing a9ptmr pass 2 to 3 so a9ptmr.diff is no need.

-rxg