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author | Chunfeng Yun <chunfeng.yun@mediatek.com> | 2020-10-14 10:08:25 +0300 |
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committer | Marek Vasut <marex@denx.de> | 2020-10-20 01:49:05 +0300 |
commit | 8faef3c756efb9ce924dce968ffddb0416208036 (patch) | |
tree | 1e13baacbda845a050e426f02439bb66271c8d33 /doc/device-tree-bindings/usb | |
parent | a93cff24b131be474e29344d1a0bc12ce380b123 (diff) | |
download | u-boot-8faef3c756efb9ce924dce968ffddb0416208036.tar.xz |
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/device-tree-bindings/usb')
-rw-r--r-- | doc/device-tree-bindings/usb/generic.txt | 31 |
1 files changed, 31 insertions, 0 deletions
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"; +}; |