linux-kernel - [PATCH V4] dt-bindings: usb: dwc3: Add interrupt-names property support for wakeup interrupt

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Date:   Mon, 19 Jun 2023 16:20:32 +0530
From:   Piyush Mehta <piyush.mehta@....com>
To:     <gregkh@...uxfoundation.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <balbi@...nel.org>
CC:     <linux-usb@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <michal.simek@....com>,
        <git@....com>, Piyush Mehta <piyush.mehta@....com>
Subject: [PATCH V4] dt-bindings: usb: dwc3: Add interrupt-names property support for wakeup interrupt

The hibernation feature enabled for Xilinx Versal NET SoC in DWC3 IP.
As the DWC3 IP supports the hibernation feature, to handle the wakeup
or hibernation interrupt, add host mode "wakeup" interrupt-names
optional property in the binding schema to capture remote-wakeup and
connect/ disconnect event in the hibernation state and increased maxItems
to 4 for the interrupts and interrupt-names property.

We have a dedicated IRQ line specifically for the hibernation feature.
When the "wakeup" IRQ line is triggered, it initiates a hibernation
interrupt, causing the system to wake up from the hibernation state.

Signed-off-by: Piyush Mehta <piyush.mehta@....com>
---
Change in V2:
- Addressed ROB review comments
 - Updated name of interrupt-names property with "wakeup"
 - Move interrupt-names property from dwc3-xilinx core to dwc3 core.

Link: https://lore.kernel.org/all/CAL_JsqK6_7XD7+w+EQvPPmbmSOpfo3JDb0xDN4StuHUm1kgchw@mail.gmail.com/

Change in V3:
-  Addressed Krzysztof Kozlowski comments
 - Update binding schema enum.
 - Upadet commit message.

Link: https://lore.kernel.org/all/76dfbf27-8ad2-6e09-5354-b006b9e81af1@linaro.org/

Change in V4:
- Addressed ROB review comments:
 - Fixed dt_check warnings

Link: https://lore.kernel.org/lkml/168448091422.2968830.10066003697035225886.robh@kernel.org/
---
 Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
index 4f7625955ccc..a696f23730d3 100644
--- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
@@ -44,15 +44,15 @@ properties:
       It's either a single common DWC3 interrupt (dwc_usb3) or individual
       interrupts for the host, gadget and DRD modes.
     minItems: 1
-    maxItems: 3
+    maxItems: 4
 
   interrupt-names:
     minItems: 1
-    maxItems: 3
+    maxItems: 4
     oneOf:
       - const: dwc_usb3
       - items:
-          enum: [host, peripheral, otg]
+          enum: [host, peripheral, otg, wakeup]
 
   clocks:
     description:
-- 
2.25.1