linux-kernel - [PATCH 1/2] dt-bindings: phy-qcom-usb-hs-phy: Add qcom,enable-vbus-pullup

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Date:   Thu, 21 May 2020 01:50:30 +0100
From:   Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To:     agross@...nel.org, bjorn.andersson@...aro.org, kishon@...com,
        vkoul@...nel.org, robh+dt@...nel.org
Cc:     linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, bryan.odonoghue@...aro.org,
        Stephen Boyd <sboyd@...nel.org>
Subject: [PATCH 1/2] dt-bindings: phy-qcom-usb-hs-phy: Add qcom,enable-vbus-pullup

This patch adds a dt-binding for qcom,enable-vbus-pullup. The binding
qcom,enable-vbus-pullup tells the HS USB PHY driver whether it should set
and unset the internal VBUS pullup bits when starting/stopping the USB PHY.

Setting the pullup bits is something you want to do if you have not routed
VBUS to a GPIO on the SoC and thus cannot use extcon with the current
switching logic in the PHY.

Cc: Andy Gross <agross@...nel.org>
Cc: Bjorn Andersson <bjorn.andersson@...aro.org>
Cc: Kishon Vijay Abraham I <kishon@...com>
Cc: Vinod Koul <vkoul@...nel.org>
Cc: Stephen Boyd <sboyd@...nel.org>
Cc: Rob Herring <robh+dt@...nel.org>
Cc: linux-arm-msm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Cc: devicetree@...r.kernel.org
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
---
 Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.txt b/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.txt
index b3b75c1e6285..77e9bf1f8ba2 100644
--- a/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.txt
+++ b/Documentation/devicetree/bindings/phy/qcom,usb-hs-phy.txt
@@ -64,6 +64,12 @@ PROPERTIES
                 from the ULPI_EXT_VENDOR_SPECIFIC address, for example,
                 <0x1 0x53> would mean "write the value 0x53 to address 0x81".
 
+- qcom,enable-vbus-pullup:
+   Usage: optional
+   Value type: <bool>
+   Definition: Flag to indicate if the USB PHY driver should toggle internal
+               VBUS line pullup bits when powering the PHY on or off.
+
 EXAMPLE
 
 otg: usb-controller {
-- 
2.25.1