X-Git-Url: https://git.proxmox.com/?a=blobdiff_plain;f=ArmPlatformPkg%2FDrivers%2FPL180MciDxe%2FPL180Mci.c;h=688cd8a98ced2b540ced7c4c7c7bfd5174ef86c4;hb=300fc77a8a4bf4bb160004dd6e5bec7333d1dc7a;hp=411a61ed040fecb63956710c681bf96d55b4550f;hpb=703da8b4ec9d04b7d4184e0322d5177becc984b1;p=mirror_edk2.git

diff --git a/ArmPlatformPkg/Drivers/PL180MciDxe/PL180Mci.c b/ArmPlatformPkg/Drivers/PL180MciDxe/PL180Mci.c
index 411a61ed04..688cd8a98c 100644
--- a/ArmPlatformPkg/Drivers/PL180MciDxe/PL180Mci.c
+++ b/ArmPlatformPkg/Drivers/PL180MciDxe/PL180Mci.c
@@ -521,6 +521,22 @@ PL180MciDxeInitialize (
   EFI_STATUS    Status;
   EFI_HANDLE    Handle;
 
+  DEBUG ((EFI_D_WARN, "Probing ID registers at 0x%lx for a PL180\n",
+    MCI_PERIPH_ID_REG0));
+
+  // Check if this is a PL180
+  if (MmioRead8 (MCI_PERIPH_ID_REG0) != MCI_PERIPH_ID0 ||
+      MmioRead8 (MCI_PERIPH_ID_REG1) != MCI_PERIPH_ID1 ||
+      MmioRead8 (MCI_PERIPH_ID_REG2) != MCI_PERIPH_ID2 ||
+      MmioRead8 (MCI_PERIPH_ID_REG3) != MCI_PERIPH_ID3 ||
+      MmioRead8 (MCI_PCELL_ID_REG0)  != MCI_PCELL_ID0  ||
+      MmioRead8 (MCI_PCELL_ID_REG1)  != MCI_PCELL_ID1  ||
+      MmioRead8 (MCI_PCELL_ID_REG2)  != MCI_PCELL_ID2  ||
+      MmioRead8 (MCI_PCELL_ID_REG3)  != MCI_PCELL_ID3) {
+
+    return EFI_NOT_FOUND;
+  }
+
   Handle = NULL;
 
   MCI_TRACE ("PL180MciDxeInitialize()");