MLK-19258-4 doc: dts: ci-hdrc-usb2: add property for picophy

Add two parameters which are used to tune USB signal for picophy,
picophy is used at imx7d and imx845.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Arulpandiyan Vadivel <arulpandiyan_vadivel@mentor.com>

diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
index 9ffb40f..9a6a21b 100644 (file)
--- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
+++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt
@@ -104,6 +104,11 @@ i.mx specific properties
 - power-polarity-active-high: add this property if port power function of ehci
   is used to enable vbus, and the vbus power supply chip enable signal is high
   active.
+- picophy,pre-emp-curr-control: picophy is used for imx7d and imx845.
+  HS Treansmitter Pre-Emphasis Current Control may need to tune for USB signal
+  See USBNC_n_PHY_CFG1 for detail.
+- picophy,dc-vol-level-adjust: HS DC Voltage Level Adjustment may need to
+  turn for USB signal, see USBNC_n_PHY_CFG1 for detail.
 
 Examples: