From: Krishna Kurapati <quic_kriskura@quicinc.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
Rob Herring <robh+dt@kernel.org>, Andy Gross <agross@kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Stephen Boyd <swboyd@chromium.org>,
"Doug Anderson" <dianders@chromium.org>,
Matthias Kaehlcke <mka@chromium.org>,
Wesley Cheng <quic_wcheng@quicinc.com>
Cc: <devicetree@vger.kernel.org>, <linux-arm-msm@vger.kernel.org>,
<linux-usb@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
<linux-phy@lists.infradead.org>, <quic_pkondeti@quicinc.com>,
<quic_ppratap@quicinc.com>, <quic_vpulyala@quicinc.com>,
Sandeep Maheswaram <quic_c_sanm@quicinc.com>,
Krishna Kurapati <quic_kriskura@quicinc.com>
Subject: [PATCH v8 1/3] dt-bindings: phy: qcom,usb-snps-femto-v2: Add phy override params bindings
Date: Wed, 1 Jun 2022 12:26:02 +0530 [thread overview]
Message-ID: <1654066564-20518-2-git-send-email-quic_kriskura@quicinc.com> (raw)
In-Reply-To: <1654066564-20518-1-git-send-email-quic_kriskura@quicinc.com>
From: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
Add device tree bindings for SNPS phy tuning parameters.
Signed-off-by: Sandeep Maheswaram <quic_c_sanm@quicinc.com>
Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
---
.../bindings/phy/qcom,usb-snps-femto-v2.yaml | 96 ++++++++++++++++++++++
1 file changed, 96 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 1ce251d..daeeb04 100644
--- a/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
@@ -53,6 +53,102 @@ properties:
vdda33-supply:
description: phandle to the regulator 3.3V supply node.
+ qcom,hs-disconnect-bp:
+ description:
+ This adjusts the voltage level for the threshold used to
+ detect a disconnect event at the host. Possible values are.
+ The values defined are in multiples of basis points (1bp = 0.01%).
+ The hardware accepts only discrete values. The value closest to the
+ provided input will be chosen as the override value for this param.
+ minimum: -272
+ maximum: 2156
+
+ qcom,squelch-detector-bp:
+ description:
+ This adjusts the voltage level for the threshold used to
+ detect valid high-speed data.
+ The values defined are in multiples of basis points (1bp = 0.01%).
+ The hardware accepts only discrete values. The value closest to the
+ provided input will be chosen as the override value for this param.
+ minimum: -2090
+ maximum: 1590
+
+ qcom,hs-amplitude-bp:
+ description:
+ This adjusts the high-speed DC level voltage.
+ The values defined are in multiples of basis points (1bp = 0.01%).
+ The hardware accepts only discrete values. The value closest to the
+ provided input will be chosen as the override value for this param.
+ minimum: -660
+ maximum: 2670
+
+ qcom,pre-emphasis-duration-bp:
+ 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.
+ The values defined are in multiples of basis points (1bp = 0.01%).
+ The hardware accepts only discrete values. The value closest to the
+ provided input will be chosen as the override value for this param.
+ minimum: 10000
+ maximum: 20000
+
+ qcom,pre-emphasis-amplitude-bp:
+ 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.
+ The values defined are in multiples of basis points (1bp = 0.01%).
+ The hardware accepts only discrete values. The value closest to the
+ provided input will be chosen as the override value for this param.
+ minimum: 10000
+ maximum: 40000
+
+ qcom,hs-rise-fall-time-bp:
+ description:
+ This adjusts the rise/fall times of the high-speed waveform.
+ The values defined are in multiples of basis points (1bp = 0.01%).
+ The hardware accepts only discrete values. The value closest to the
+ provided input will be chosen as the override value for this param.
+ minimum: -4100
+ maximum: 5430
+
+ qcom,hs-crossover-voltage-microvolt:
+ description:
+ This adjusts the voltage at which the DP<#> and DM<#>
+ signals cross while transmitting in HS mode.
+ The values defined are in milli volts. The hardware accepts only
+ discrete values. The value closest to the provided input will be
+ chosen as the override value for this param.
+ minimum: -31000
+ maximum: 28000
+
+ qcom,hs-output-impedance-micro-ohms:
+ 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. The values defined are in milli ohms.
+ The hardware accepts only discrete values. The value closest to the
+ provided input will be chosen as the override value for this param.
+ minimum: -2300000
+ maximum: 6100000
+
+ qcom,ls-fs-output-impedance-bp:
+ 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.
+ The values defined are in multiples of basis points (1bp = 0.01%).
+ The hardware accepts only discrete values. The value closest to the
+ provided input will be chosen as the override value for this param.
+ minimum: -1053
+ maximum: 1310
+
required:
- compatible
- reg
--
2.7.4
next prev parent reply other threads:[~2022-06-01 6:56 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-01 6:56 [PATCH v8 0/3] Add QCOM SNPS PHY overriding params support Krishna Kurapati
2022-06-01 6:56 ` Krishna Kurapati [this message]
2022-06-01 12:28 ` [PATCH v8 1/3] dt-bindings: phy: qcom,usb-snps-femto-v2: Add phy override params bindings Rob Herring
2022-06-01 17:33 ` Rob Herring
2022-06-01 17:36 ` Krishna Kurapati PSSNV
2022-06-08 9:30 ` Krishna Kurapati PSSNV
2022-06-08 9:38 ` Krzysztof Kozlowski
2022-06-08 9:36 ` Krzysztof Kozlowski
2022-06-08 11:03 ` Krishna Kurapati PSSNV
2022-06-08 12:07 ` Krishna Kurapati PSSNV
2022-06-08 15:53 ` Vinod Koul
2022-06-08 16:14 ` Krishna Kurapati PSSNV
2022-06-01 6:56 ` [PATCH v8 2/3] phy: qcom-snps: Add support for overriding phy tuning parameters Krishna Kurapati
2022-06-08 9:46 ` Krzysztof Kozlowski
2022-06-08 16:04 ` Vinod Koul
[not found] ` <295d0748-d817-2afa-19d2-5e802ad7fec0@quicinc.com>
2022-06-17 0:29 ` Vinod Koul
2022-06-01 6:56 ` [PATCH v8 3/3] arm64: dts: qcom: sc7280: Update SNPS Phy params for SC7280 IDP device Krishna Kurapati
2022-06-08 9:36 ` Krzysztof Kozlowski
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