Please refer to the following u-boot patch for LS1028ARDB, you need to add related code in u-boot.
nxa13285@lsv07330:/opt/samba/nxa13285/flexbuild/flexbuild/components/firmware/rcw$ git diff
diff --git a/ls1028ardb/R_SQPP_0x85bb/rcw_1500_gpu600.rcw b/ls1028ardb/R_SQPP_0x85bb/rcw_1500_gpu600.rcw
index 057b0f1..2e4fa7d 100644
--- a/ls1028ardb/R_SQPP_0x85bb/rcw_1500_gpu600.rcw
+++ b/ls1028ardb/R_SQPP_0x85bb/rcw_1500_gpu600.rcw
@@ -38,6 +38,7 @@ SRDS_PRTCL_S1_L0=8
SRDS_PRTCL_S1_L1=5
SRDS_PRTCL_S1_L2=11
SRDS_PRTCL_S1_L3=11
+HOST_AGT_PEX2=1
/* Errata for PCIe controller */
#include <../ls1028asi/a008851.rcw>
nxa13285@lsv07330:/opt/samba/nxa13285/flexbuild/flexbuild/components/firmware/rcw$
nxa13285@lsv07330:/opt/samba/nxa13285/flexbuild/flexbuild/components/firmware/uboot$ git diff
diff --git a/arch/arm/dts/fsl-ls1028a.dtsi b/arch/arm/dts/fsl-ls1028a.dtsi
index 7234faea0e..bda9035ea0 100644
--- a/arch/arm/dts/fsl-ls1028a.dtsi
+++ b/arch/arm/dts/fsl-ls1028a.dtsi
@@ -123,6 +123,17 @@
0x82000000 0x0 0x40000000 0x88 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
};
+
+ pcie_ep2: pcie_ep@3500000 {
+ compatible = "fsl,ls-pcie-ep";
+ reg = <0x00 0x03500000 0x0 0x80000
+ 0x00 0x035c0000 0x0 0x40000
+ 0x88 0x00000000 0x8 0x00000000>;
+ reg-names = "regs", "ctrl", "addr_space";
+ num-ib-windows = <6>;
+ num-ob-windows = <8>;
+ };
+
crypto: crypto@8000000 {
compatible = "fsl,sec-v5.0", "fsl,sec-v4.0";
fsl,sec-era = <10>;
diff --git a/configs/ls1028ardb_tfa_defconfig b/configs/ls1028ardb_tfa_defconfig
index 87357d30c0..0afbc815c1 100644
--- a/configs/ls1028ardb_tfa_defconfig
+++ b/configs/ls1028ardb_tfa_defconfig
@@ -94,3 +94,4 @@ CONFIG_OF_LIBFDT_OVERLAY=y
CONFIG_EFI_LOADER_BOUNCE_BUFFER=y
CONFIG_VIDEO=y
CONFIG_VIDEO_LS_HDP_LOAD=y
+CONFIG_PCIE_LAYERSCAPE_EP=y
