| Message ID | f5ea5bc3664a98a684ad4b699a1ac610e847176f.1630389452.git.baruch@tkos.co.il |
|---|---|
| State | New |
| Headers | show |
| Series | [v3,1/4] dt-bindings: usb: dwc3: add reference clock period | expand |
Baruch Siach <baruch@tkos.co.il> writes: > From: Balaji Prakash J <bjagadee@codeaurora.org> > > Set reference clock period when it differs from dwc3 default hardware > set. > > We could calculate clock period based on reference clock frequency. But > this information is not always available. This is the case of PCI bus > attached USB host. For that reason we use a custom property. > > Tested (USB2 only) on IPQ6010 SoC based board with 24 MHz reference > clock while hardware default is 19.2 MHz. > > Nacked-by: Rob Herring <robh@kernel.org> > Signed-off-by: Balaji Prakash J <bjagadee@codeaurora.org> > [ baruch: rewrite commit message; drop GFLADJ code; remove 'quirk-' from > property name; mention tested hardware ] > Signed-off-by: Baruch Siach <baruch@tkos.co.il> Acked-by: Felipe Balbi <balbi@kernel.org>
On Tue, 31 Aug 2021 08:57:29 +0300, Baruch Siach wrote: > Document the snps,ref-clock-period-ns property that describes reference > clock period when it deviates from the default set value. > > Signed-off-by: Baruch Siach <baruch@tkos.co.il> > --- > v2: > > Address comments from Rob Herring: > > Use standard unit suffix > > Reword description > --- > Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 8 ++++++++ > 1 file changed, 8 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org>
diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml index 41416fbd92aa..413ac37c447f 100644 --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml @@ -252,6 +252,14 @@ properties: minimum: 0 maximum: 0x3f + snps,ref-clock-period-ns: + description: + Value for REFCLKPER field of GUCTL register for reference clock period in + nanoseconds, when the hardware set default does not match the actual + clock. + minimum: 1 + maximum: 0x3ff + snps,rx-thr-num-pkt-prd: description: Periodic ESS RX packet threshold count (host mode only). Set this and
Document the snps,ref-clock-period-ns property that describes reference clock period when it deviates from the default set value. Signed-off-by: Baruch Siach <baruch@tkos.co.il> --- v2: Address comments from Rob Herring: Use standard unit suffix Reword description --- Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 8 ++++++++ 1 file changed, 8 insertions(+)