[PATCH v2 4/5] phy: DT binding documentation for qoriq usb 2.0 phy
From: robh@kernel.org (Rob Herring)
Date: 2016-07-16 00:35:08
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linux-devicetree, lkml
On Sat, Jul 09, 2016 at 10:00:55AM +0530, Rajesh Bhagat wrote:
quoted hunk
Describes the qoriq usb 2.0 phy driver binding, currently used for LS1021A and LS1012A platform. Signed-off-by: Rajesh Bhagat <redacted> --- Changes in v2: - Adds DT binding documentation for qoriq usb 2.0 phy - Changed the compatible string to fsl,qoriq-usb2-phy .../devicetree/bindings/phy/qoriq-usb2-phy.txt | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/qoriq-usb2-phy.txtdiff --git a/Documentation/devicetree/bindings/phy/qoriq-usb2-phy.txt b/Documentation/devicetree/bindings/phy/qoriq-usb2-phy.txt new file mode 100644 index 0000000..f043855 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/qoriq-usb2-phy.txt@@ -0,0 +1,22 @@ +QorIQ SoC USB 2.0 PHY + +Required properties: + - compatible: should be "fsl,qoriq-usb2-phy", + Wherever applicable, the version of the USB PHY should + also be mentioned (for eg. fsl,qoriq-usb2-phy-vX.Y). + where, X = Phy vendor(Legacy = 1, NXP = 2) and Y = PHY version
What does Legacy mean? FSL? Use SoC specific compatible strings.
+ - reg : Address and length of the usb phy control register set.
+ - phy_type : For multi port host USB controllers, should be one of
+ "ulpi", or "serial". For dual role USB controllers, should be
+ one of "ulpi", "utmi", "utmi_wide", or "serial".
+
+The main purpose of this PHY driver is to enable the USB PHY reference clock
+gate on the QorIQ SOC for USB2 PHY OR implement errata workaround in
+future. Otherwise it is just an NOP PHY driver.
+
+usbphy0: usbphy at 8600000 {
+ compatible = "fsl,qoriq-usb2-phy" "fsl,qoriq-usb2-phy-vX.Y";most specific first.
+ reg = <0x0 0x8600000 0x0 0x1000>; + #phy-cells = <0>; + phy_type = "ulpi"; +};