Hi Kathiravan, On Thu, Jan 20 2022, Kathiravan T wrote: > On 2022-01-19 23:44, Baruch Siach wrote: >> Hi Sean, >> On Tue, Jan 18 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. >> Tested here on IPQ6010 based system. USB still works. But the with >> "ref" >> clock at 24MHz, period is calculated as 0x29. Previous >> snps,ref-clock-period-ns value used to be 0x32. >> Is that expected? > > Yes, it is 0x29 for IPQ60xx based SoCs. In downstream it was wrongly mentioned > as 0x32, which was corrected recently. Thanks for the update. This needs fixing in upstream kernel. I'll send a patch. For some reason USB appears to work here with both values. Is it because I only use USB2 signals? If this is the case them I can not actually test this series on my system. Thanks, baruch >>> [1] >>> https://lore.kernel.org/linux-usb/20220114044230.2677283-1-robert.hancock@xxxxxxxxxx/ >>> Changes in v2: >>> - Document clock members >>> - Also program GFLADJ.240MHZDECR >>> - Don't program GFLADJ if the version is < 2.50a >>> - Add snps,ref-clock-frequency-hz property for ACPI >>> Sean Anderson (7): >>> 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: Program GFLADJ >>> usb: dwc3: Add snps,ref-clock-frequency-hz property for ACPI >>> 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 | 112 +++++++++++++++--- >>> drivers/usb/dwc3/core.h | 17 ++- >>> 6 files changed, 120 insertions(+), 27 deletions(-) -- ~. .~ Tk Open Systems =}------------------------------------------------ooO--U--Ooo------------{= - baruch@xxxxxxxxxx - tel: +972.52.368.4656, http://www.tkos.co.il -
