Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
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linux
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@quicinc.com>
Signed-off-by: Krishna Kurapati <quic_kriskura@quicinc.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/1662480933-12326-2-git-send-email-quic_kriskura@quicinc.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
authored by
Sandeep Maheswaram
and committed by
Vinod Koul
ba136ce3
ac439ce8
+88
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Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
+88
Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
···
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vdda33-supply:
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description: phandle to the regulator 3.3V supply node.
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qcom,hs-disconnect-bp:
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description:
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This adjusts the voltage level for the threshold used to
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detect a disconnect event at the host.
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The hardware accepts only discrete values. The value closest to the
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provided input will be chosen as the override value for this param.
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minimum: -272
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maximum: 2156
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qcom,squelch-detector-bp:
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description:
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This adjusts the voltage level for the threshold used to
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detect valid high-speed data.
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The hardware accepts only discrete values. The value closest to the
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provided input will be chosen as the override value for this param.
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minimum: -2090
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maximum: 1590
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qcom,hs-amplitude-bp:
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description:
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This adjusts the high-speed DC level voltage.
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The hardware accepts only discrete values. The value closest to the
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provided input will be chosen as the override value for this param.
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minimum: -660
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maximum: 2670
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qcom,pre-emphasis-duration-bp:
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description:
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This signal controls the duration for which the
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HS pre-emphasis current is sourced onto DP<#> or DM<#>.
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The HS Transmitter pre-emphasis duration is defined in terms of
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unit amounts. One unit of pre-emphasis duration is approximately
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650 ps and is defined as 1X pre-emphasis duration.
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The hardware accepts only discrete values. The value closest to the
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provided input will be chosen as the override value for this param.
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minimum: 10000
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maximum: 20000
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qcom,pre-emphasis-amplitude-bp:
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description:
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This signal controls the amount of current sourced to
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DP<#> and DM<#> after a J-to-K or K-to-J transition.
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The HS Transmitter pre-emphasis current is defined in terms of unit
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amounts. One unit amount is approximately 2 mA and is defined as
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1X pre-emphasis current.
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The hardware accepts only discrete values. The value closest to the
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provided input will be chosen as the override value for this param.
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minimum: 10000
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maximum: 40000
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qcom,hs-rise-fall-time-bp:
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description:
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This adjusts the rise/fall times of the high-speed waveform.
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The hardware accepts only discrete values. The value closest to the
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provided input will be chosen as the override value for this param.
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minimum: -4100
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maximum: 5430
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qcom,hs-crossover-voltage-microvolt:
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description:
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This adjusts the voltage at which the DP<#> and DM<#>
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signals cross while transmitting in HS mode.
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The hardware accepts only discrete values. The value closest to the
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provided input will be chosen as the override value for this param.
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minimum: -31000
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maximum: 28000
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qcom,hs-output-impedance-micro-ohms:
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description:
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In some applications, there can be significant series resistance
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on the D+ and D- paths between the transceiver and cable. This adjusts
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the driver source impedance to compensate for added series
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resistance on the USB. The hardware accepts only discrete values. The
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value closest to the provided input will be chosen as the override value
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for this param.
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minimum: -2300000
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maximum: 6100000
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qcom,ls-fs-output-impedance-bp:
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description:
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This adjusts the low- and full-speed single-ended source
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impedance while driving high. The following adjustment values are based
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on nominal process, voltage, and temperature.
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The hardware accepts only discrete values. The value closest to the
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provided input will be chosen as the override value for this param.
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minimum: -1053
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maximum: 1310
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+
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required:
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- compatible
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- reg