linux-kernel - [PATCH v2 1/2] dt-bindings: usb: snps,dwc3: Add snps,filter-se0-fsls-eop quirk

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Message-ID: <20241017114055.13971-2-quic_uaggarwa@quicinc.com>
Date: Thu, 17 Oct 2024 17:10:54 +0530
From: Uttkarsh Aggarwal <quic_uaggarwa@...cinc.com>
To: Krzysztof Kozlowski <krzk+dt@...nel.org>, Rob Herring <robh@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Greg Kroah-Hartman
	<gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>,
        Thinh Nguyen
	<Thinh.Nguyen@...opsys.com>
CC: <linux-usb@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <quic_ppratap@...cinc.com>,
        <quic_jackp@...cinc.com>,
        Uttkarsh Aggarwal <quic_uaggarwa@...cinc.com>
Subject: [PATCH v2 1/2] dt-bindings: usb: snps,dwc3: Add snps,filter-se0-fsls-eop quirk

Adding a new 'snps,filter-se0-fsls-eop quirk' DT quirk to dwc3 core to set
GUCTL1 BIT 29. When set, controller will ignore single SE0 glitch on the
linestate during transmission. Only two or more SE0 is considered as
valid EOP on FS/LS port. This bit is applicable only in FS in device mode
and FS/LS mode of operation in host mode.

Signed-off-by: Uttkarsh Aggarwal <quic_uaggarwa@...cinc.com>
---
 Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
index 1cd0ca90127d..d9e813bbcd80 100644
--- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
@@ -180,6 +180,12 @@ properties:
     description: When set core will set Tx de-emphasis value
     type: boolean
 
+  snps,filter-se0-fsls-eop-quirk:
+    description:
+      When set controller will ignore single SE0 glitch on the linestate during transmit
+      Only two or more SE0 is considered as a valid EOP on FS/LS port.
+    type: boolean
+
   snps,tx_de_emphasis:
     description:
       The value driven to the PHY is controlled by the LTSSM during USB3
-- 
2.17.1