On 1/5/23 00:48, Heinrich Schuchardt wrote:
Am 5. Januar 2023 00:19:36 MEZ schrieb Adam Ford aford173@gmail.com:
On Wed, Jan 4, 2023 at 5:15 PM Heinrich Schuchardt xypron.glpk@gmx.de wrote:
On 1/4/23 22:35, Adam Ford wrote:
ATF generates a couple memory nodes based on how it's compiled and generates a reserved-memory node, and I want to overlay it with the device tree so Linux knows about this reserved memory.
When I boot U-Boot, I can read the reserved-memory node:
=> fdt addr 0xe631e588 Working FDT set to e631e588 => fdt print /reserved-memory reserved-memory { lossy-decompression@54000000 { renesas,formats = <0x00000000>; no-map; reg = <0x00000000 0x54000000 0x00000000 0x03000000>; compatible = "renesas,lossy-decompression", "shared-dma-pool"; }; }; =>
I attempt to overlay it with the following:
=> run loadfdt 65932 bytes read in 6 ms (10.5 MiB/s) => fdt addr $load_addr
When actually setting the address you will see a message "Working FDT set to %lx\n". So I assume $load_addr is empty.
Did you mean $loadaddr or $fileaddr?
Opps, that was a copy-paste error. Even with that, I still get the failure to overlay:
Did you load a .dtbo file to apply? You cannot apply a devicetree.
Is the fdt that you want to apply the overlay to built with symbols (dtc parameter -@)?
Note that the fragment passed to U-Boot by upstream ATF is already automatically merged into the U-Boot control DT (see board/renesas/rcar-common/common.c ) . U-Boot should pass that on to Linux automatically.