[PATCH v3 1/6] dt-bindings: usb: xhci: add property to disable xhci 64bit support
From: Li Jun <hidden>
Date: 2020-09-22 10:54:18
Also in:
linux-devicetree, linux-usb
Subsystem:
open firmware and flattened device tree bindings, the rest, usb subsystem · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds, Greg Kroah-Hartman
Add a property "xhci-64bit-support-disable" to disable xhci 64bit address dma, some SoC integration may not support 64bit DMA but the AC64 bit (bit 0) of HCCPARAMS1 is kept to be 1. Signed-off-by: Li Jun <redacted> --- Documentation/devicetree/bindings/usb/usb-xhci.txt | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.txt b/Documentation/devicetree/bindings/usb/usb-xhci.txt
index 0c5cff8..26446fb 100644
--- a/Documentation/devicetree/bindings/usb/usb-xhci.txt
+++ b/Documentation/devicetree/bindings/usb/usb-xhci.txt@@ -28,6 +28,9 @@ Optional properties: - quirk-broken-port-ped: set if the controller has broken port disable mechanism - imod-interval-ns: default interrupt moderation interval is 5000ns - phys : see usb-hcd.yaml in the current directory + - xhci-64bit-support-disable: set if the AC64 bit (bit 0) of HCCPARAMS1 is + set to be 1, but the controller actually can't handle 64-bit address + due to SoC integration. additionally the properties from usb-hcd.yaml (in the current directory) are supported.
--
2.7.4
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