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Date: Wed, 8 Nov 2017 13:16:41 +0530 From: Raveendra Padasalagi <raveendra.padasalagi@...adcom.com> To: Rob Herring <robh+dt@...nel.org>, Mark Rutland <mark.rutland@....com>, Kishon Vijay Abraham I <kishon@...com>, Russell King <linux@...linux.org.uk>, Scott Branden <sbranden@...adcom.com>, Ray Jui <rjui@...adcom.com>, Srinath Mannam <srinath.mannam@...adcom.com>, Vikram Prakash <vikram.prakash@...adcom.com>, Jon Mason <jonmason@...adcom.com>, Florian Fainelli <f.fainelli@...il.com>, Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>, Raviteja Garimella <raviteja.garimella@...adcom.com>, Rafal Milecki <rafal@...ecki.pl>, Arnd Bergmann <arnd@...db.de>, Viresh Kumar <viresh.kumar@...aro.org>, Jaehoon Chung <jh80.chung@...sung.com> Cc: devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, bcm-kernel-feedback-list@...adcom.com, Raveendra Padasalagi <raveendra.padasalagi@...adcom.com> Subject: [PATCH v2 1/3] dt-bindings: phy: Add Cygnus usb phy binding Add devicetree binding document for broadcom's Cygnus SoC specific usb phy controller driver. Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@...adcom.com> --- .../bindings/phy/brcm,cygnus-usb-phy.txt | 106 +++++++++++++++++++++ 1 file changed, 106 insertions(+) create mode 100644 Documentation/devicetree/bindings/phy/brcm,cygnus-usb-phy.txt diff --git a/Documentation/devicetree/bindings/phy/brcm,cygnus-usb-phy.txt b/Documentation/devicetree/bindings/phy/brcm,cygnus-usb-phy.txt new file mode 100644 index 0000000..bbc4b94 --- /dev/null +++ b/Documentation/devicetree/bindings/phy/brcm,cygnus-usb-phy.txt @@ -0,0 +1,106 @@ +BROADCOM CYGNUS USB PHY + +Required Properties: +- compatible: brcm,cygnus-usb-phy +- reg : the register start address and length for + crmu_usbphy_aon_ctrl, + cdru usb phy control, + usb host idm registers, + usb device idm registers. +- reg-names: a list of the names corresponding to the previous register ranges + Should contain + "crmu-usbphy-aon-ctrl", + "cdru-usbphy", + "usb2h-idm", + "usb2d-idm". +- address-cells: should be 1 +- size-cells: should be 0 + +Sub-nodes: + Each port's PHY should be represented as a sub-node. + +Sub-nodes required properties: +- reg: the PHY number +- #phy-cells must be 1 + The node that uses the phy must provide 1 integer argument specifying + port number. + +Optional Properties: +- vbus-p#-supply : The regulator for vbus out control for the host + functionality enabled ports. +- vbus-gpios: vbus gpio binding + This is mandatory for port 2, as port 2 is used as dual role phy. + Based on the vbus and id values device or host role is determined + for phy 2. + +- extcon: extcon phandle + This is mandatory for port 2, as port 2 is used as dual role phy. + extcon should be phandle to external usb gpio module which provide + device or host role notifications based on the ID and VBUS gpio's state. + + +Refer to phy/phy-bindings.txt for the generic PHY binding properties + +NOTE: port 0 and port 1 are host only and port 2 is dual role port. + +Example of phy : + usbphy: usb-phy@...1c028 { + compatible = "brcm,cygnus-usb-phy"; + reg = <0x0301c028 0x4>, + <0x0301d1b4 0x5c>, + <0x18115000 0xa00>, + <0x18111000 0xa00>; + reg-names = "crmu-usbphy-aon-ctrl", "cdru-usbphy", + "usb2h-idm", "usb2d-idm"; + #address-cells = <1>; + #size-cells = <0>; + + usbphy0: usb-phy@0 { + reg = <0>; + #phy-cells = <1>; + }; + + usbphy1: usb-phy@1 { + reg = <1>; + #phy-cells = <1>; + }; + + usbphy2: usb-phy@2 { + reg = <2>; + #phy-cells = <1>; + extcon = <&extcon_usb>; + }; + }; + + extcon_usb: extcon_usb { + compatible = "linux,extcon-usb-gpio"; + vbus-gpio = <&gpio_asiu 121 0>; + id-gpio = <&gpio_asiu 122 0>; + status = "okay"; + }; + + +Example of node using the phy: + + /* This nodes declares all three ports, port 0 + and port 1 are host and port 2 is device or host */ + + ehci0: usb@...48000 { + compatible = "generic-ehci"; + reg = <0x18048000 0x100>; + interrupts = <GIC_SPI 72 IRQ_TYPE_LEVEL_HIGH>; + phys = <&usbphy0 0 &usbphy1 1 &usbphy2 2>; + phy-names = "usbp0","usbp1","usbp2"; + status = "okay"; + }; + + /* This node declares port 2 phy + and configures it for device */ + + usbd_udc_dwc1: usb@...4c000 { + compatible = "iproc-udc"; + reg = <0x1804c000 0x2000>; + interrupts = <GIC_SPI 123 IRQ_TYPE_LEVEL_HIGH>; + phys = <&usbphy2 2>; + phy-names = "usbdrd"; + }; -- 1.9.1
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