[v13,1/3] dt-bindings: phy: qcom,usb-snps-femto-v2: Add phy override params bindings

Commit Message

Krishna Kurapati Sept. 6, 2022, 4:15 p.m. UTC

From: Sandeep Maheswaram <[e-mail]>

Add device tree bindings for SNPS phy tuning parameters.

Signed-off-by: Sandeep Maheswaram <[e-mail]>
Signed-off-by: Krishna Kurapati <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
---
 .../bindings/phy/qcom,usb-snps-femto-v2.yaml       | 88 ++++++++++++++++++++++
 1 file changed, 88 insertions(+)

Patch

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 f2aeffd..68e7096 100644
--- a/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
+++ b/Documentation/devicetree/bindings/phy/qcom,usb-snps-femto-v2.yaml
@@ -54,6 +54,94 @@  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.
+      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 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 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 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 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 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 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 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 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