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Date: Thu, 3 Mar 2022 11:43:29 +0530
From: Sandeep Maheswaram <quic_c_sanm@...cinc.com>
To: Rob Herring <robh+dt@...nel.org>, Andy Gross <agross@...nel.org>,
"Bjorn Andersson" <bjorn.andersson@...aro.org>,
Kishon Vijay Abraham I <kishon@...com>,
Vinod Koul <vkoul@...nel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Wesley Cheng <wcheng@...eaurora.org>,
"Stephen Boyd" <swboyd@...omium.org>,
Doug Anderson <dianders@...omium.org>,
"Matthias Kaehlcke" <mka@...omium.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
CC: <devicetree@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linux-phy@...ts.infradead.org>,
<linux-usb@...r.kernel.org>, <quic_pkondeti@...cinc.com>,
<quic_ppratap@...cinc.com>,
Sandeep Maheswaram <quic_c_sanm@...cinc.com>
Subject: [PATCH v2 1/3] dt-bindings: phy: qcom,usb-snps-femto-v2: Add phy override params bindings
Add device tree bindings for SNPS phy tuning parameters.
Signed-off-by: Sandeep Maheswaram <quic_c_sanm@...cinc.com>
---
.../bindings/phy/qcom,usb-snps-femto-v2.yaml | 125 +++++++++++++++++++++
1 file changed, 125 insertions(+)
diff --git a/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml b/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
index 0dfe691..227c097 100644
--- a/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
@@ -50,6 +50,131 @@ properties:
vdda33-supply:
description: phandle to the regulator 3.3V supply node.
+ qcom,hs-disconnect:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ This adjusts the voltage level for the threshold used to
+ detect a disconnect event at the host. Possible values are.
+ 7 -> +21.56%
+ 6 -> +17.43%
+ 5 -> +13.32%
+ 4 -> +9.73%
+ 3 -> +6.3
+ 2 -> +3.17%
+ 1 -> 0, Design default%
+ 0 -> -2.72%
+
+ qcom,squelch-detector:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ This adjusts the voltage level for the threshold used to
+ detect valid high-speed data. Possible values are
+ 7-> -20.90%
+ 6-> -15.60%
+ 5-> -10.30%
+ 4-> -5.30%
+ 3-> 0, Design default%
+ 2-> +5.30%
+ 1-> +10.60%
+ 0-> +15.90%
+
+ qcom,hs-amplitude:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ This adjusts the high-speed DC level voltage.
+ Possible values are
+ 15-> +26.70%
+ 14-> +24.30%
+ 13-> +22.20%
+ 12-> +20.00%
+ 11-> +17.80%
+ 10-> +15.60%
+ 9-> +13.30%
+ 8-> +11.10%
+ 7-> +8.90%
+ 6-> +6.50%
+ 5-> +4.40%
+ 4-> +2.30%
+ 3-> 0, Design default%
+ 2-> -2.20%
+ 1-> -4.40%
+ 0-> -6.60%
+
+ qcom,pre-emphasis-duration:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ This signal controls the duration for which the
+ HS pre-emphasis current is sourced onto DP<#> or DM<#>.
+ The HS Transmitter pre-emphasis duration is defined in terms of
+ unit amounts. One unit of pre-emphasis duration is approximately
+ 650 ps and is defined as 1X pre-emphasis duration.
+ Possible values are
+ 1-> 1x, short pre-emphasis current duration
+ 0-> 2x, long pre-emphasis current duration
+
+ qcom,pre-emphasis-amplitude:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ This signal controls the amount of current sourced to
+ DP<#> and DM<#> after a J-to-K or K-to-J transition.
+ The HS Transmitter pre-emphasis current is defined in terms of unit
+ amounts. One unit amount is approximately 2 mA and is defined as
+ 1X pre-emphasis current.
+ Possible values are
+ 3-> HS Transmitter pre-emphasis circuit sources 3x pre-emphasis
+ current.
+ 2-> (design default) HS Transmitter pre-emphasis circuit sources 2x
+ pre-emphasis current.
+ 1-> HS Transmitter pre-emphasis circuit sources 1x pre-emphasis
+ current.
+ 0-> HS Transmitter pre-emphasis circuit sources 4x pre-emphasis
+ current.
+
+ qcom,hs-rise-fall-time:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ This adjusts the rise/fall times of the high-speed waveform.
+ Possible values are
+ 3-> -41.0%
+ 2-> 0, Design default
+ 1-> +28.1
+ 0-> +54.3%
+
+ qcom,hs-crossover-voltage:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ This adjusts the voltage at which the DP<#> and DM<#>
+ signals cross while transmitting in HS mode.
+ Possible values are
+ 3-> 0, Default setting
+ 2-> +28 mV
+ 1-> -31 mV
+ 0-> Reserved
+
+ qcom,hs-output-impedance:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ In some applications, there can be significant series resistance
+ on the D+ and D- paths between the transceiver and cable. This adjusts
+ the driver source impedance to compensate for added series
+ resistance on the USB.
+ 3-> Source impedance is decreased by approximately 2.3 ohms
+ 2-> 0, Design default
+ 1-> Source impedance is increased by approximately 2.6 ohms
+ 0-> Source impedance is increased by approximately 6.1 ohms
+
+ qcom,ls-fs-output-impedance:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description:
+ This adjusts the low- and full-speed single-ended source
+ impedance while driving high. The following adjustment values are based
+ on nominal process, voltage, and temperature.
+ 15-> -10.53%
+ 7-> -5.57%
+ 3-> 0, Design default
+ 1-> +6.12%
+ 0-> +13.10%
+
required:
- compatible
- reg
--
2.7.4
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