[+cc Shawn] On Sat, Nov 12, 2016 at 12:40:10PM +0530, Kishon Vijay Abraham I wrote: > Hi, > > On Saturday 12 November 2016 02:45 AM, Bjorn Helgaas wrote: > > Hi Kishon, > > > > On Tue, Oct 11, 2016 at 06:28:34PM +0530, Kishon Vijay Abraham I wrote: > >> PCIe in AM57x/DRA7x devices is by default > >> configured to work in GEN2 mode. However there > >> may be situations when working in GEN1 mode is > >> desired. One example is limitation i925 (PCIe GEN2 > >> mode not supported at junction temperatures < 0C). > >> > >> Add support to force Root Complex to work in GEN1 > >> mode if so desired, but don't force GEN1 mode on > >> any board just yet. > >> > >> Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx> > >> Signed-off-by: Sekhar Nori <nsekhar@xxxxxx> > >> --- > >> Documentation/devicetree/bindings/pci/ti-pci.txt | 1 + > >> drivers/pci/host/pci-dra7xx.c | 27 ++++++++++++++++++++++ > >> 2 files changed, 28 insertions(+) > >> > >> diff --git a/Documentation/devicetree/bindings/pci/ti-pci.txt b/Documentation/devicetree/bindings/pci/ti-pci.txt > >> index 60e2516..a3d6ca3 100644 > >> --- a/Documentation/devicetree/bindings/pci/ti-pci.txt > >> +++ b/Documentation/devicetree/bindings/pci/ti-pci.txt > >> @@ -25,6 +25,7 @@ PCIe Designware Controller > >> > >> Optional Property: > >> - gpios : Should be added if a gpio line is required to drive PERST# line > >> + - ti,pcie-is-gen1 : Force the PCIe controller to work in GEN1 (2.5 GT/s). > > > > Can we use "max-link-speed" so it's similar to imx6? > > yeah, maybe we should make it a generic PCI property? I forgot that Shawn has already done this! I had already merged those patches on pci/host-rockchip, but I moved them to pci/host since they're not Rockchip-specific. Can you take a look at that and see if you can do what you need based on that pci/host branch? Bjorn -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
