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Message-ID: <CAAFb_vqKLOixSROUvkRFR=hwOqQvnVyV4mu37=MrEBo-pZaF5w@mail.gmail.com>
Date: Mon, 13 Nov 2017 09:53:45 +0530
From: Raveendra Padasalagi <raveendra.padasalagi@...adcom.com>
To: Rob Herring <robh@...nel.org>
Cc: 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>,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org,
bcm-kernel-feedback-list <bcm-kernel-feedback-list@...adcom.com>
Subject: Re: [PATCH v2 1/3] dt-bindings: phy: Add Cygnus usb phy binding
Hi,
On Sat, Nov 11, 2017 at 3:14 AM, Rob Herring <robh@...nel.org> wrote:
> On Wed, Nov 08, 2017 at 01:16:41PM +0530, Raveendra Padasalagi wrote:
>> 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
>
> Is this a literal # or something else?
Yes, this is a literal. It's assumed # will replace numeric 0-2 for
each of the ports.
In the example it's not shown as the regulators specified in vbus-p#-supply
are board specific.
>> + 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.
>
> These optional properties don't match with the example.
vbus-gpios is placed by mistake here in the documentation,
this is no more required. I will remove it in the next version of the patch.
>> +
>> +- 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";
>
> Don't show status in examples.
Ok, Thanks. I will update it in the next version of the patch.
>> + };
>> +
>> + /* 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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