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Commit 05db0dcc authored by Martin Blumenstingl's avatar Martin Blumenstingl Committed by Greg Kroah-Hartman
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dt-bindings: usb: add the documentation for USB HCDs 



A USB HCD may have several PHYs which need to be configured before the
the HCD starts working.
This adds the documentation for such a USB HCD as well as a reference to
the new "usb-hcd.txt" from all bindings that implement a USB HCD which
support one USB PHY per port.

Signed-off-by: default avatarMartin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Tested-by: default avatarYixun Lan <yixun.lan@amlogic.com>
Tested-by: default avatarNeil Armstrong <narmstrong@baylibre.con>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 01812ba3

Documentation/devicetree/bindings/usb/mediatek,mtk-xhci.txt

+4 −1
Original line number Diff line number Diff line
@@ -32,7 +32,7 @@ Required properties: 
	"mcu_ck": mcu_bus clock for register access,

	"dma_ck": dma_bus clock for data transfer by DMA



 - phys : a list of phandle + phy specifier pairs

 - phys : see usb-hcd.txt in the current directory



Optional properties:

 - wakeup-source : enable USB remote wakeup;
@@ -52,6 +52,9 @@ Optional properties: 
	See: Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt

 - imod-interval-ns: default interrupt moderation interval is 5000ns



additionally the properties from usb-hcd.txt (in the current directory) are

supported.



Example:

usb30: usb@11270000 {

	compatible = "mediatek,mt8173-xhci";

Documentation/devicetree/bindings/usb/mediatek,mtu3.txt

+4 −1
Original line number Diff line number Diff line
@@ -17,7 +17,7 @@ Required properties: 
 - clock-names : must contain "sys_ck" for clock of controller,

	the following clocks are optional:

	"ref_ck", "mcu_ck" and "dam_ck";

 - phys : a list of phandle + phy specifier pairs

 - phys : see usb-hcd.txt in the current directory

 - dr_mode : should be one of "host", "peripheral" or "otg",

	refer to usb/generic.txt
@@ -53,6 +53,9 @@ Optional properties: 
 - mediatek,u3p-dis-msk : mask to disable u3ports, bit0 for u3port0,

	bit1 for u3port1, ... etc;



additionally the properties from usb-hcd.txt (in the current directory) are

supported.



Sub-nodes:

The xhci should be added as subnode to mtu3 as shown in the following example

if host mode is enabled. The DT binding details of xhci can be found in:

Documentation/devicetree/bindings/usb/usb-ehci.txt

+4 −2
Original line number Diff line number Diff line
@@ -16,10 +16,12 @@ Optional properties: 
 - has-transaction-translator : boolean, set this if EHCI have a Transaction

				Translator built into the root hub.

 - clocks : a list of phandle + clock specifier pairs

 - phys : phandle + phy specifier pair

 - phy-names : "usb"

 - phys : see usb-hcd.txt in the current directory

 - resets : phandle + reset specifier pair



additionally the properties from usb-hcd.txt (in the current directory) are

supported.



Example (Sequoia 440EPx):

    ehci@e0000300 {

	   compatible = "ibm,usb-ehci-440epx", "usb-ehci";

Documentation/devicetree/bindings/usb/usb-hcd.txt

0 → 100644
+9 −0
Original line number Diff line number Diff line 
Generic USB HCD (Host Controller Device) Properties



Optional properties:

- phys: a list of all USB PHYs on this HCD



Example:

	&usb1 {

		phys = <&usb2_phy1>, <&usb3_phy1>;

	};

Documentation/devicetree/bindings/usb/usb-ohci.txt

+4 −2
Original line number Diff line number Diff line
@@ -13,10 +13,12 @@ Optional properties: 
- remote-wakeup-connected: remote wakeup is wired on the platform

- num-ports : u32, to override the detected port count

- clocks : a list of phandle + clock specifier pairs

- phys : phandle + phy specifier pair

- phy-names : "usb"

- phys : see usb-hcd.txt in the current directory

- resets : a list of phandle + reset specifier pairs



additionally the properties from usb-hcd.txt (in the current directory) are

supported.



Example:



	ohci0: usb@1c14400 {