On 3 July 2017 at 05:01, Jun Nie <jun....@linaro.org> wrote: > Some boards may have max clock limitation. Add a Pcd to notify > driver. > > Contributed-under: TianoCore Contribution Agreement 1.0 > Signed-off-by: Jun Nie <jun....@linaro.org> > --- > EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c | 4 ++++ > EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.inf | 1 + > EmbeddedPkg/EmbeddedPkg.dec | 1 + > 3 files changed, 6 insertions(+) > > diff --git a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c > b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.c > index fe23d11..308f3a7 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 (BusClockFreq > PcdGet32 (PcdDwEmmcDxeMaxClockFrequencyInHz)) { > + return EFI_UNSUPPORTED; > + } > + > if (TimingMode != EMMCBACKWARD) { > Data = MmioRead32 (DWEMMC_UHSREG); > switch (TimingMode) { > diff --git a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.inf > b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.inf > index e3c8313..3582997 100644 > --- a/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.inf > +++ b/EmbeddedPkg/Drivers/DwEmmcDxe/DwEmmcDxe.inf > @@ -48,6 +48,7 @@ > [Pcd] > gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeBaseAddress > gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeClockFrequencyInHz > + gDwEmmcDxeTokenSpaceGuid.PcdDwEmmcDxeMaxClockFrequencyInHz > > [Depex] > TRUE > diff --git a/EmbeddedPkg/EmbeddedPkg.dec b/EmbeddedPkg/EmbeddedPkg.dec > index 0d4a062..aec8259 100644 > --- a/EmbeddedPkg/EmbeddedPkg.dec > +++ b/EmbeddedPkg/EmbeddedPkg.dec > @@ -167,6 +167,7 @@ > # DwEmmc Driver PCDs > gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeBaseAddress|0x0|UINT32|0x00000035 > > gEmbeddedTokenSpaceGuid.PcdDwEmmcDxeClockFrequencyInHz|0x0|UINT32|0x00000036 > + > gDwEmmcDxeTokenSpaceGuid.PcdDwEmmcDxeMaxClockFrequencyInHz|0x0|UINT32|400000000 >
Please use the correct token space guid, or add it to the correct .dec file. _______________________________________________ edk2-devel mailing list edk2-devel@lists.01.org https://lists.01.org/mailman/listinfo/edk2-devel