[PATCH v3 1/4] dt-bindings: phy: imx8mq-usb: fix fsl,phy-tx-vboost-level-microvolt property

Xu Yang xu.yang_2 at nxp.com
Wed Apr 30 02:44:59 PDT 2025


The ticket TKT0676370 shows the description of TX_VBOOST_LVL is wrong in
register PHY_CTRL3 bit[31:29].

  011: Corresponds to a launch amplitude of 1.12 V.
  010: Corresponds to a launch amplitude of 1.04 V.
  000: Corresponds to a launch amplitude of 0.88 V.

After updated:

  011: Corresponds to a launch amplitude of 0.844 V.
  100: Corresponds to a launch amplitude of 1.008 V.
  101: Corresponds to a launch amplitude of 1.156 V.

This will correct it accordingly.

Fixes: b2e75563dc39 ("dt-bindings: phy: imx8mq-usb: add phy tuning properties")
Cc: stable at vger.kernel.org
Reviewed-by: Jun Li <jun.li at nxp.com>
Signed-off-by: Xu Yang <xu.yang_2 at nxp.com>

---
Changes in v3:
 - new patch, only fix wrong property
---
 Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
index daee0c0fc915..c468207eb951 100644
--- a/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
+++ b/Documentation/devicetree/bindings/phy/fsl,imx8mq-usb-phy.yaml
@@ -63,8 +63,7 @@ properties:
   fsl,phy-tx-vboost-level-microvolt:
     description:
       Adjust the boosted transmit launch pk-pk differential amplitude
-    minimum: 880
-    maximum: 1120
+    enum: [844, 1008, 1156]
 
   fsl,phy-comp-dis-tune-percent:
     description:
-- 
2.34.1




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