Add bindings for common properties, include maximum-speed,
dr_mode and phy_type
Signed-off-by: Chunfeng Yun <chunfeng....@mediatek.com>
Reviewed-by: Bin Meng <bmeng...@gmail.com>
---
v8: add Reviewed-by Bin
v2~v7: no changes
---
doc/device-tree-bindings/usb/generic.txt | 31 ++++++++++++++++++++++++
1 file changed, 31 insertions(+)
create mode 100644 doc/device-tree-bindings/usb/generic.txt
diff --git a/doc/device-tree-bindings/usb/generic.txt
b/doc/device-tree-bindings/usb/generic.txt
new file mode 100644
index 0000000000..a02a198dfb
--- /dev/null
+++ b/doc/device-tree-bindings/usb/generic.txt
@@ -0,0 +1,31 @@
+Generic USB Properties
+
+Optional properties:
+ - maximum-speed: tells USB controllers we want to work up to a certain
+ speed. Valid arguments are "super-speed-plus",
+ "super-speed", "high-speed", "full-speed" and
+ "low-speed". In case this isn't passed via DT, USB
+ controllers should default to their maximum HW
+ capability.
+ - dr_mode: tells Dual-Role USB controllers that we want to work on a
+ particular mode. Valid arguments are "host",
+ "peripheral" and "otg". In case this attribute isn't
+ passed via DT, USB DRD controllers should default to
+ OTG.
+ - phy_type: tells USB controllers that we want to configure the core to
support
+ a UTMI+ PHY with an 8- or 16-bit interface if UTMI+ is
+ selected. Valid arguments are "utmi" and "utmi_wide".
+ In case this isn't passed via DT, USB controllers should
+ default to HW capability.
+
+This is an attribute to a USB controller such as:
+
+dwc3@4a030000 {
+ compatible = "synopsys,dwc3";
+ reg = <0x4a030000 0xcfff>;
+ interrupts = <0 92 4>
+ usb-phy = <&usb2_phy>, <&usb3,phy>;
+ maximum-speed = "super-speed";
+ dr_mode = "otg";
+ phy_type = "utmi_wide";
+};
--
2.18.0
