пн, 6 янв. 2020 г. в 23:44, Robert Nelson <robertcnelson@xxxxxxxxx>: > > On Mon, Jan 6, 2020 at 7:10 AM Matwey V. Kornilov <matwey@xxxxxxxxxx> wrote: > > > > BeagleBone Black series is equipped with 512MB RAM > > whereas only 256MB is included from am335x-bone-common.dtsi > > FYI: While all versions from the factory are 512MB, some 3rd parties > offered 1GB reballing upgrades.. > > and the SanCloud variant which uses this file, was built with 1GB: > > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/arch/arm/boot/dts/am335x-sancloud-bbe.dts > > > > > This leads to an issue with unusual setups when devicetree > > is loaded by GRUB2 directly. > > It's a miracle, since when did GRUB2 gain this ability? > I am not sure about when. But Grub 2.02 has devicetree command, which can be used as the following: echo "Loading device tree blob ..." devicetree (tftp)/dtb/am335x-boneblack.dtb And you know, you can run Grub itself as EFI application on to of u-boot. > > > > Signed-off-by: Matwey V. Kornilov <matwey@xxxxxxxxxx> > > --- > > arch/arm/boot/dts/am335x-boneblack-common.dtsi | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/arch/arm/boot/dts/am335x-boneblack-common.dtsi b/arch/arm/boot/dts/am335x-boneblack-common.dtsi > > index 7ad079861efd..91f93bc89716 100644 > > --- a/arch/arm/boot/dts/am335x-boneblack-common.dtsi > > +++ b/arch/arm/boot/dts/am335x-boneblack-common.dtsi > > @@ -131,6 +131,11 @@ > > }; > > > > / { > > + memory@80000000 { > > + device_type = "memory"; > > + reg = <0x80000000 0x20000000>; /* 512 MB */ > > + }; > > + > > clk_mcasp0_fixed: clk_mcasp0_fixed { > > #clock-cells = <0>; > > compatible = "fixed-clock"; > > -- > > 2.16.4 > > > > > -- > Robert Nelson > https://rcn-ee.com/ -- With best regards, Matwey V. Kornilov. Sternberg Astronomical Institute, Lomonosov Moscow State University, Russia 119234, Moscow, Universitetsky pr-k 13, +7 (495) 9392382
