linux-kernel - [PATCH 1/2] dt-bindings: usb: dwc3: Add binding for USB Gen2 de-emphasis

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20241007135508.3143756-2-joychakr@google.com>
Date: Mon,  7 Oct 2024 13:55:05 +0000
From: Joy Chakraborty <joychakr@...gle.com>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Thinh Nguyen <Thinh.Nguyen@...opsys.com>, Felipe Balbi <balbi@...nel.org>
Cc: linux-usb@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Joy Chakraborty <joychakr@...gle.com>
Subject: [PATCH 1/2] dt-bindings: usb: dwc3: Add binding for USB Gen2 de-emphasis

PIPE4 spec defines an 18bit de-emphasis setting to be passed from
controller to the PHY.
TxDeemph[17:0] is split as [5:0] C-1, [11:6] C0, [17:12] C+1 for 3 tap
filter used for USB Gen2(10GT/s).

Signed-off-by: Joy Chakraborty <joychakr@...gle.com>
---
 Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
index 1cd0ca90127d..a1f1bbcf1467 100644
--- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
+++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml
@@ -190,6 +190,18 @@ properties:
       - 1 # -3.5dB de-emphasis
       - 2 # No de-emphasis
 
+  snps,tx_gen2_de_emphasis_quirk:
+    description: When set core will set Tx de-emphasis for USB Gen2
+    type: boolean
+
+  snps,tx_gen2_de_emphasis:
+    description:
+      The 18bit value of Tx deemphasis defined in PIPE4 spec driven to PHY
+      for normal operation.
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 0x3ffff
+
   snps,dis_u3_susphy_quirk:
     description: When set core will disable USB3 suspend phy
     type: boolean
-- 
2.47.0.rc0.187.ge670bccf7e-goog