Hi Tony, On 9/15/21 1:50 AM, Tony Lindgren wrote: > Starting with v5.15-rc1, I'm now seeing am335x beaglebone black produce > the following error on pruss probe: > > Unhandled fault: external abort on non-linefetch (0x1008) at 0xe0326000 > > This seems to have started with the enabling of pruss for am335x in the > dts files. Adding a read-back after write to the sysconfig register fixes > the issue for me. Let me take a look at this during the weekend. I did verify the AM335x PRUSS when I posted the dts patches on 5.14-rc. You should be able to check as well from your staging branch with PRUSS patches. regards Suman > > Cc: Suman Anna <s-anna@xxxxxx> > Signed-off-by: Tony Lindgren <tony@xxxxxxxxxxx> > --- > drivers/bus/ti-sysc.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/drivers/bus/ti-sysc.c b/drivers/bus/ti-sysc.c > --- a/drivers/bus/ti-sysc.c > +++ b/drivers/bus/ti-sysc.c > @@ -2037,6 +2037,9 @@ static int sysc_reset(struct sysc *ddata) > sysc_val = sysc_read_sysconfig(ddata); > sysc_val |= sysc_mask; > sysc_write(ddata, sysc_offset, sysc_val); > + > + /* Flush posted write */ > + sysc_read_sysconfig(ddata); > } > > if (ddata->cfg.srst_udelay) >
