lkml.org 
[lkml]   [2021]   [Nov]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH v2 1/3] dt-bindings: usb: usb-xhci: Add bindings for usb-skip-phy-init property
From
Date

On 11/13/2021 4:17 AM, Rob Herring wrote:
> On Mon, Nov 08, 2021 at 12:11:48PM +0530, Sandeep Maheswaram wrote:
>> Adding bindings for usb-skip-phy-init property.
>> Runtime suspend of phy drivers was failing from DWC3 driver as
>> runtime usage value is 2 because the phy is initialized from
>> DWC3 core and HCD core.
>> Some controllers like DWC3 and CDNS3 manage phy in their core drivers.
>> This property can be set to avoid phy initialization in HCD core.
> You already know if you have a DWC3 and CDNS3 controller, so you don't
> need more data in DT.

We don't have a device tree node for xhci platform device and create
xhci platform device from dwc3/host.c

So we want to pass this property to check in xhci-plat.c and skip phy
initialization.

>> Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
>> ---
>> Documentation/devicetree/bindings/usb/usb-xhci.yaml | 4 ++++
>> 1 file changed, 4 insertions(+)
>>
>> diff --git a/Documentation/devicetree/bindings/usb/usb-xhci.yaml b/Documentation/devicetree/bindings/usb/usb-xhci.yaml
>> index 965f87f..a64d29f 100644
>> --- a/Documentation/devicetree/bindings/usb/usb-xhci.yaml
>> +++ b/Documentation/devicetree/bindings/usb/usb-xhci.yaml
>> @@ -25,6 +25,10 @@ properties:
>> description: Set if the controller has broken port disable mechanism
>> type: boolean
>>
>> + usb-skip-phy-init:
>> + description: Set if the phy initialization is managed by controller
>> + type: boolean
>> +
>> imod-interval-ns:
>> description: Interrupt moderation interval
>> default: 5000
>> --
>> 2.7.4
>>
>>

\
 
 \ /
  Last update: 2021-11-16 11:43    [W:0.054 / U:1.060 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site