From 6f84a28df802cd23e3a526a49a6417462bdbbed3 Mon Sep 17 00:00:00 2001 From: Serge Semin Date: Thu, 10 Dec 2020 12:09:37 +0300 Subject: [PATCH] dt-bindings: usb: dwc3: Add Tx De-emphasis constraints In accordance with the driver comments the PIPE3 de-emphasis can be tuned to be either -6dB, -2.5dB or disabled. Let's add the de-emphasis property constraints so the DT schema would make sure the controller DT node is equipped with correct value. Reviewed-by: Rob Herring Signed-off-by: Serge Semin Link: https://lore.kernel.org/r/20201210090944.16283-14-Sergey.Semin@baikalelectronics.ru Signed-off-by: Greg Kroah-Hartman --- Documentation/devicetree/bindings/usb/snps,dwc3.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml index 6253bc5..e01a9a9 100644 --- a/Documentation/devicetree/bindings/usb/snps,dwc3.yaml +++ b/Documentation/devicetree/bindings/usb/snps,dwc3.yaml @@ -156,6 +156,10 @@ properties: The value driven to the PHY is controlled by the LTSSM during USB3 Compliance mode. $ref: /schemas/types.yaml#/definitions/uint8 + enum: + - 0 # -6dB de-emphasis + - 1 # -3.5dB de-emphasis + - 2 # No de-emphasis snps,dis_u3_susphy_quirk: description: When set core will disable USB3 suspend phy -- 2.7.4