[PATCH v3 1/6] dt-bindings: usb: xhci: add property to disable xhci 64bit support
robh at kernel.org
Tue Sep 29 14:11:08 EDT 2020
On Tue, Sep 22, 2020 at 06:46:47PM +0800, Li Jun wrote:
> 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.
Use 'dma-ranges' for this.
> Signed-off-by: Li Jun <jun.li at nxp.com>
> 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
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