From 91cd1c34b4d845483b1dc4e6fe3ab86c6b25c763 Mon Sep 17 00:00:00 2001 From: Peter Chen Date: Tue, 21 Aug 2018 17:15:36 +0800 Subject: MLK-23319-2 doc: dts: ci-hdrc-usb2: add property for imx picophy Add two parameters which are used to tune USB signal for imx picophy, picophy is used at imx7d and imx8mm. Reviewed-by: Jun Li Signed-off-by: Peter Chen --- Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'Documentation/devicetree/bindings/usb') diff --git a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt index c2d72c8fe6a0..5dc237f59940 100644 --- a/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt +++ b/Documentation/devicetree/bindings/usb/ci-hdrc-usb2.txt @@ -97,6 +97,13 @@ i.mx specific properties It's recommended to specify the over current polarity. - power-active-high: power signal polarity is active high - external-vbus-divider: enables off-chip resistor divider for Vbus +- picophy,pre-emp-curr-control: HS Transmitter Pre-Emphasis Current + Control. This signal controls the amount of current sourced to the + USB_OTG*_DP and USB_OTG*_DN pins after a J-to-K or K-to-J transition. + Details can refer to TXPREEMPAMPTUNE0 bits of USBNC_n_PHY_CFG1. +- picophy,dc-vol-level-adjust: HS DC Voltage Level Adjustment. + Adjust the high-speed transmitter DC level voltage, details can refer + to TXVREFTUNE0 bits of USBNC_n_PHY_CFG1. Example: -- cgit v1.2.3