On Fri, 3 Sept 2021 at 07:16, Thierry Reding <[email protected]> wrote: > > From: Thierry Reding <[email protected]> > > The EMC frequency tables are created from a training sequence performed > during early boot and passed in via a reserved memory region by nvtboot. > Copy this table to the kernel DTB so that the kernel can use it to scale > the EMC frequency at runtime. > > Note that early bootloaders store the EMC table at an address that > currently intersects with the load address of the initial ramdisk. In > order to avoid copying the table to a different address, simply change > the load address for the initial ramdisk in U-Boot. > > Signed-off-by: Thierry Reding <[email protected]> > --- > board/nvidia/p2371-2180/p2371-2180.c | 1 + > board/nvidia/p3450-0000/p3450-0000.c | 1 + > include/configs/tegra210-common.h | 2 +- > 3 files changed, 3 insertions(+), 1 deletion(-)
Reviewed-by: Simon Glass <[email protected]> > > diff --git a/board/nvidia/p2371-2180/p2371-2180.c > b/board/nvidia/p2371-2180/p2371-2180.c > index f5126c552b00..cd5dc2de629e 100644 > --- a/board/nvidia/p2371-2180/p2371-2180.c > +++ b/board/nvidia/p2371-2180/p2371-2180.c > @@ -183,6 +183,7 @@ static void ft_carveout_setup(void *fdt) > static const char * const nodes[] = { > "/host1x@50000000/dc@54200000", > "/host1x@50000000/dc@54240000", > + "/external-memory-controller@7001b000", > }; This would be better added to the DT in 'sysinfo' driver or something like that. It is not nice to have DT paths in the C code. - Simon
