On Wed, May 04, 2022 at 12:46:26AM +0300, Serge Semin wrote: > Since DWC PCIe v4.70a the controller version can be read from the > PORT_LOGIC.PCIE_VERSION_OFF register. Version is represented in the FourCC > format [1]. It's standard versioning approach for the Synopsys DWC > IP-cores. Moreover some of the DWC kernel drivers already make use of it > to fixup version-dependent functionality (See DWC USB3, Stmicro STMMAC or > recent DW SPI driver). In order to preserve the standard version > representation and prevent the data conversion back and forth, we suggest > to preserve the native version representation in the DWC PCIe driver too > in the same way as it has already been done in the rest of the DWC > drivers. IP-core version reading from the CSR will be introduced in the > next commit together with a simple macro-based API to use it. > > [1] https://en.wikipedia.org/wiki/FourCC > > Signed-off-by: Serge Semin <Sergey.Semin@xxxxxxxxxxxxxxxxxxxx> > --- > drivers/pci/controller/dwc/pci-keystone.c | 12 ++++++------ > drivers/pci/controller/dwc/pcie-designware.c | 8 ++++---- > drivers/pci/controller/dwc/pcie-designware.h | 10 +++++++++- > drivers/pci/controller/dwc/pcie-intel-gw.c | 4 ++-- > drivers/pci/controller/dwc/pcie-tegra194.c | 2 +- > 5 files changed, 22 insertions(+), 14 deletions(-) Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
