X-Git-Url: https://git.proxmox.com/?p=mirror_edk2.git;a=blobdiff_plain;f=EmbeddedPkg%2FDrivers%2FDwEmmcDxe%2FDwEmmcDxe.c;h=bb26b69fd16b89ff89aea72af95191ebb59224e5;hp=fe23d113ee1204f4525bb7340f41f8e52c979c2d;hb=d4102f68dceb36fa8f07af9fa3d24b0da9f173bf;hpb=d4f6c35c84b8503bc2acde89a7adb7ee05c56516

diff --git a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c
index fe23d113ee..bb26b69fd1 100644
--- a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c
+++ b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c
@@ -560,6 +560,10 @@ DwEmmcSetIos (
   EFI_STATUS Status = EFI_SUCCESS;
   UINT32    Data;
 
+  if ((PcdGet32 (PcdDwEmmcDxeMaxClockFreqInHz) != 0) &&
+      (BusClockFreq > PcdGet32 (PcdDwEmmcDxeMaxClockFreqInHz))) {
+    return EFI_UNSUPPORTED;
+  }
   if (TimingMode != EMMCBACKWARD) {
     Data = MmioRead32 (DWEMMC_UHSREG);
     switch (TimingMode) {