Hi Sean, Baruch Siach wrote: > Hi Sean, Thinh, > > On Fri, Jan 14 2022, Sean Anderson wrote: >> This is a rework of patches 3-5 of [1]. It attempts to correctly program >> REFCLKPER and REFCLK_FLADJ based on the reference clock frequency. Since >> we no longer need a special property duplicating this configuration, >> snps,ref-clock-period-ns is deprecated. >> >> Please test this! Patches 3/4 in this series have the effect of >> programming REFCLKPER and REFCLK_FLADJ on boards which already configure >> the "ref" clock. I have build tested, but not much else. >> >> [1] https://urldefense.com/v3/__https://lore.kernel.org/linux-usb/20220114044230.2677283-1-robert.hancock@xxxxxxxxxx/__;!!A4F2R9G_pg!M3zKxDZC9a_etqzXo7GSEMTHRWfc1wR_84wwM4-fShiA35CsGcxcTEffHPbprbdC4d2R$ > > Thinh, you suggested the dedicated DT property for the reference clock: > > https://urldefense.com/v3/__https://lore.kernel.org/all/d5acb192-80b9-36f7-43f5-81f21c4e6ba0@xxxxxxxxxxxx/__;!!A4F2R9G_pg!M3zKxDZC9a_etqzXo7GSEMTHRWfc1wR_84wwM4-fShiA35CsGcxcTEffHPbprbpOFmvX$ > > Can you comment on this series? > Unless there's a good way to pass this information for PCI devices, my opinion hasn't changed. (Btw, I don't think creating a dummy clock provider and its dummy ops is a good solution as seems to complicate and bloat the PCI glue drivers). Please help come up with a solution before deprecating the ref clock property. Thanks, Thinh > >> Sean Anderson (6): >> dt-bindings: usb: dwc3: Deprecate snps,ref-clock-period-ns >> usb: dwc3: Get clocks individually >> usb: dwc3: Calculate REFCLKPER based on reference clock >> usb: dwc3: Handle fractional reference clocks >> arm64: dts: zynqmp: Move USB clocks to dwc3 node >> arm64: dts: ipq6018: Use reference clock to set dwc3 period >> >> .../devicetree/bindings/usb/snps,dwc3.yaml | 7 +- >> arch/arm64/boot/dts/qcom/ipq6018.dtsi | 3 +- >> .../arm64/boot/dts/xilinx/zynqmp-clk-ccf.dtsi | 4 +- >> arch/arm64/boot/dts/xilinx/zynqmp.dtsi | 4 +- >> drivers/usb/dwc3/core.c | 98 ++++++++++++++++--- >> drivers/usb/dwc3/core.h | 6 +- >> 6 files changed, 98 insertions(+), 24 deletions(-) > >
