linux-kernel - [PATCH v2 1/2] dt-bindings: phy: Add qcom,dp-manual-pullup description

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Message-Id: <20221229183410.683584-2-bryan.odonoghue@linaro.org>
Date:   Thu, 29 Dec 2022 18:34:09 +0000
From:   Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To:     agross@...nel.org, andersson@...nel.org, vkoul@...nel.org,
        kishon@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     konrad.dybcio@...aro.org, linux-arm-msm@...r.kernel.org,
        linux-phy@...ts.infradead.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
        bryan.odonoghue@...aro.org
Subject: [PATCH v2 1/2] dt-bindings: phy: Add qcom,dp-manual-pullup description

The original Qualcomm driver for the HighSpeed USB PHY contains a flag
which tells the driver that the controller and PHY do not connect to VBUS.

In this case an external IC such as a Type-C port manager supplies VBUS and
the VBUS signal is not routed to the SoC. This means we cannot detect the
presence or absence of VBUS and cannot take action based on it.

Document the downstream boolean qcom,dp-manual-pullup to allow the HS PHY
implement the necessary logic.

Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
---
 Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.yaml | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.yaml b/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.yaml
index aa97478dd0161..c55a59df71ad0 100644
--- a/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.yaml
@@ -80,6 +80,13 @@ properties:
             the address is offset from the ULPI_EXT_VENDOR_SPECIFIC address
         - description: value
 
+  qcom,dp-manual-pullup:
+    type: boolean
+    description: This flag indicates to the HS USB PHY driver that it should
+                 enable or disable an internal pullup when powering on or
+                 powering off the HS PHY instead of toggling the value when VBUS
+                 is absent or present.
+
 required:
   - clocks
   - clock-names
-- 
2.34.1