út 10. 11. 2020 v 16:20 odesílatel Michal Simek
<michal.si...@xilinx.com> napsal:
>
> The reason for this change is that after change from amba to axi U-Boot
> started to show error like:
> Unable to update property /axi/ethernet@ff0e0000:mac-address,
> err=FDT_ERR_NOTFOUND
> Unable to update property /axi/ethernet@ff0e0000:local-mac-address,
> err=FDT_ERR_NOTFOUND
>
> The reason is implementation in fdt_nodename_eq_() which is taken from dtc
> to the kernel and to the U-Boot. Especially DTC commit d2a9da045897 ("libfdt:
> Make unit address optional for finding nodes") which is in DTC from 2007.
>
> The part of commit description is
> " This is contrary to traditional OF-like finddevice() behaviour, which
> allows the unit address to be omitted (which is useful when the device
> name is unambiguous without the address)."
>
> The kernel commit dfff9066e60e ("arm64: dts: zynqmp: Rename buses to be
> align with simple-bus yaml") changed amba-apu/amba to axi@0/axi but
> fdt_nodename_eq_() detects /axi/ as match for /axi@0/ because of commit
> above.
>
> That's why it easier to fix one DT inside the kernel by moving GIC node
> from own bus to generic axi bus as is done by others SoCs. This will avoid
> incorrect match because the unit address is omitted.
>
> Reported-by: Paul Thomas <pthomas8...@gmail.com>
> Signed-off-by: Michal Simek <michal.si...@xilinx.com>
> ---
>
> arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 31 ++++++++++----------------
> 1 file changed, 12 insertions(+), 19 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
> b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
> index 771f60e0346d..515b15ed634a 100644
> --- a/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
> +++ b/arch/arm64/boot/dts/xilinx/zynqmp.dtsi
> @@ -182,25 +182,6 @@ fpga_full: fpga-full {
> ranges;
> };
>
> - amba_apu: axi@0 {
> - compatible = "simple-bus";
> - #address-cells = <2>;
> - #size-cells = <1>;
> - ranges = <0 0 0 0 0xffffffff>;
> -
> - gic: interrupt-controller@f9010000 {
> - compatible = "arm,gic-400";
> - #interrupt-cells = <3>;
> - reg = <0x0 0xf9010000 0x10000>,
> - <0x0 0xf9020000 0x20000>,
> - <0x0 0xf9040000 0x20000>,
> - <0x0 0xf9060000 0x20000>;
> - interrupt-controller;
> - interrupt-parent = <&gic>;
> - interrupts = <1 9 0xf04>;
> - };
> - };
> -
> amba: axi {
> compatible = "simple-bus";
> #address-cells = <2>;
> @@ -339,6 +320,18 @@ fpd_dma_chan8: dma@fd570000 {
> power-domains = <&zynqmp_firmware PD_GDMA>;
> };
>
> + gic: interrupt-controller@f9010000 {
> + compatible = "arm,gic-400";
> + #interrupt-cells = <3>;
> + reg = <0x0 0xf9010000 0x0 0x10000>,
> + <0x0 0xf9020000 0x0 0x20000>,
> + <0x0 0xf9040000 0x0 0x20000>,
> + <0x0 0xf9060000 0x0 0x20000>;
> + interrupt-controller;
> + interrupt-parent = <&gic>;
> + interrupts = <1 9 0xf04>;
> + };
> +
> /* LPDDMA default allows only secured access. inorder to
> enable
> * These dma channels, Users should ensure that these dma
> * Channels are allowed for non secure access.
> --
> 2.29.2
>
Applied.
M
--
Michal Simek, Ing. (M.Eng), OpenPGP -> KeyID: FE3D1F91
w: www.monstr.eu p: +42-0-721842854
Maintainer of Linux kernel - Xilinx Microblaze
Maintainer of Linux kernel - Xilinx Zynq ARM and ZynqMP ARM64 SoCs
U-Boot custodian - Xilinx Microblaze/Zynq/ZynqMP/Versal SoCs
