/** @file
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Copyright (c) 2020, ARM Ltd. All rights reserved.<BR>
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SPDX-License-Identifier: BSD-2-Clause-Patent
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**/
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#include <Uefi.h>
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#include <IndustryStandard/RpiMbox.h>
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#include <Library/SerialPortLib.h>
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#include <Library/PcdLib.h>
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#include <Protocol/RpiFirmware.h>
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EFI_STATUS
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EFIAPI
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DualSerialPortDxeLibConstructor (
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IN EFI_HANDLE ImageHandle,
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IN EFI_SYSTEM_TABLE *SystemTable
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)
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{
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RASPBERRY_PI_FIRMWARE_PROTOCOL *Firmware;
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UINT32 ClockRate;
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EFI_STATUS Status;
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Status = SystemTable->BootServices->LocateProtocol (
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&gRaspberryPiFirmwareProtocolGuid,
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NULL, (VOID **)&Firmware);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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Status = Firmware->GetClockRate (RPI_MBOX_CLOCK_RATE_CORE, &ClockRate);
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if (EFI_ERROR (Status)) {
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return Status;
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}
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PatchPcdSet32 (PcdSerialClockRate, ClockRate);
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return EFI_SUCCESS;
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}
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