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authorChunfeng Yun <chunfeng.yun@mediatek.com>2020-10-14 15:08:25 +0800
committerMarek Vasut <marex@denx.de>2020-10-20 00:49:05 +0200
commit8faef3c756efb9ce924dce968ffddb0416208036 (patch)
tree1e13baacbda845a050e426f02439bb66271c8d33 /doc
parenta93cff24b131be474e29344d1a0bc12ce380b123 (diff)
downloadu-boot-8faef3c756efb9ce924dce968ffddb0416208036.tar.gz
dt-binding: usb: add bindings for some common properties
Add bindings for common properties, include maximum-speed, dr_mode and phy_type Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Diffstat (limited to 'doc')
-rw-r--r--doc/device-tree-bindings/usb/generic.txt31
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diff --git a/doc/device-tree-bindings/usb/generic.txt b/doc/device-tree-bindings/usb/generic.txt
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+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";
+};