Am Samstag, 16. Juli 2016, 17:57:15 schrieb Rob Herring: > On Thu, Jul 14, 2016 at 04:59:20PM +0800, William Wu wrote: > > Add snps,phyif-utmi-width devicetree property to configure > > the UTMI+ PHY with an 8- or 16-bit interface. UTMI+ PHY > > interface is a hardware property, and it's platform dependent. > > Normally,the PHYIF can be configured during coreconsultant. > > ^ > space > > > But for some specific USB cores(e.g. rk3399 SoC DWC3), the > > default PHYIF configuration value is fault, so we need to > > reconfigure it by software. > > > > And refer to the DWC3 databook, the GUSB2PHYCFG.USBTRDTIM > > must be set to the corresponding value according to the > > UTMI+ PHY interface. > > > > Signed-off-by: William Wu <william.wu@xxxxxxxxxxxxxx> > > --- > > Changes in v7: > > - remove quirk and use only one property to configure utmi (Heiko, Rob > > Herring) > > > > Changes in v6: > > - use '-' instead of '_' in dts (Rob Herring) > > > > Changes in v5: > > - None > > > > Changes in v4: > > - rebase on top of balbi testing/next, remove pdata (balbi) > > > > Changes in v3: > > - None > > > > Changes in v2: > > - add a quirk for phyif_utmi (balbi) > > > > Documentation/devicetree/bindings/usb/dwc3.txt | 3 +++ > > drivers/usb/dwc3/core.c | 25 > > +++++++++++++++++++++++++ drivers/usb/dwc3/core.h > > | 10 ++++++++++ > > 3 files changed, 38 insertions(+) > > > > diff --git a/Documentation/devicetree/bindings/usb/dwc3.txt > > b/Documentation/devicetree/bindings/usb/dwc3.txt index 020b0e9..00cc541 > > 100644 > > --- a/Documentation/devicetree/bindings/usb/dwc3.txt > > +++ b/Documentation/devicetree/bindings/usb/dwc3.txt > > > > @@ -47,6 +47,9 @@ Optional properties: > > - snps,hird-threshold: HIRD threshold > > - snps,hsphy_interface: High-Speed PHY interface selection between > > "utmi" for> > > UTMI+ and "ulpi" for ULPI when the DWC_USB3_HSPHY_INTERFACE has value > > 3. > > > > + - snps,phyif-utmi-width: the value to configure the core to support a > > UTMI+ PHY + with an 8- or 16-bit interface. Value 8 select 8-bit > > + interface, value 16 select 16-bit interface. > > Is 'phy_type = "utmi_wide"' not the same as 16-bit width? > > Again, I think this should be common. after knowing that I need to look for that "utmi_wide", I think I'd agree. I found mention of that in usb/ci-hdrc-usb2.txt and usb/fsl-usb.txt and from the coresponding code, I can see that they really mean the 16bit interface, the Rockchip TRM as well as the spec [0] seems to call it UTMI+ but really looks the same as utmi_wide. Interestingly, there is already generic code in drivers/usb/phy/of.c so that property should probably move to devicetree/bindings/usb/generic.txt as well. Heiko [0] http://cache.nxp.com/files/corporate/doc/support_info/UTMI-PLUS-SPECIFICATION.pdf -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
