Re: [PATCH v7 3/5] usb: dwc3: make usb2 phy utmi interface configurable in DT
From: Rob Herring <hidden>
Date: 2016-07-16 22:57:20
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linux-rockchip, lkml
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.
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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 <redacted> --- 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. Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html