linux-kernel - Re: [v2, 1/2] Documentation: bindings: add DT documentation for Rockchip USB2PHY

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Date:	Mon, 6 Jun 2016 12:30:11 +0800
From:	Frank Wang <frank.wang@...k-chips.com>
To:	Guenter Roeck <linux@...ck-us.net>, heiko@...ech.de
Cc:	dianders@...omium.org, kishon@...com, robh+dt@...nel.org,
	pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
	linux-usb@...r.kernel.org, linux-rockchip@...ts.infradead.org,
	jwerner@...omium.org, xzy.xu@...k-chips.com,
	huangtao@...k-chips.com, kever.yang@...k-chips.com,
	william.wu@...k-chips.com, frank.wang@...k-chips.com
Subject: Re: [v2, 1/2] Documentation: bindings: add DT documentation for
 Rockchip USB2PHY

Hi Guenter,

On 2016/6/4 3:25, Guenter Roeck wrote:
> On Thu, Jun 02, 2016 at 02:48:09PM +0800, Frank Wang wrote:
>> Signed-off-by: Frank Wang <frank.wang@...k-chips.com>
>> ---
>>
>> Changes in v2:
>>   - Changed vbus_host optional property from gpio to regulator.
>>   - Specified vbus_otg-supply optional property.
>>   - Specified otg_id and otg_bvalid property.
>>
>>   .../bindings/phy/phy-rockchip-inno-usb2.txt        |   55 ++++++++++++++++++++
>>   1 file changed, 55 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
>>
>> diff --git a/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt b/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
>> new file mode 100644
>> index 0000000..132e707
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
>> @@ -0,0 +1,55 @@
>> +ROCKCHIP USB2.0 PHY WITH INNO IP BLOCK
>> +
>> +Required properties (phy (parent) node):
>> + - compatible : should contain:
>> +	* "rockchip,rk3366-usb2phy"
>> +	* "rockchip,rk3399-usb2phy"
>> + - #clock-cells : should be 0.
>> + - clock-names : specify the 480m output clk name.
>> +
>> +Optional properties:
>> + - vbus_host-supply : phandle to a regulator that supplies host vbus.
>> + - vbus_otg-supply : phandle to a regulator that supplies otg vbus.
>> +
>> +Required nodes : a sub-node is required for each port the phy provides.
>> +		 The sub-node name is used to identify host or otg port.
>> +
> Would it make sense to also specify the sub-node names ? The driver matches
> "host-port", and presumably once supported "otg-port". Someone not knowing
> this may specify "hostport" or some other name variant and wonder why nothing
> works as expected.
Well, Yeah, I will correct it in the next patch (patch v3).
>> +Required properties (port (child) node):
>> + - #phy-cells : must be 0. See ./phy-bindings.txt for details.
>> + - interrupts : specify an interrupt for each entry in interrupt-names.
>> + - interrupt-names : a list which shall be the following entries:
>> +	* "otg_id" : for the otg id interrupt.
>> +	* "otg_bvalid" : for the otg vbus interrupt.
>> +	* "linestate" : for the host or otg linestate interrupt.
>> +
>> +Example:
>> +
>> +grf: syscon@...70000 {
>> +	compatible = "rockchip,rk3366-grf", "syscon", "simple-mfd";
>> +	#address-cells = <1>;
>> +	#size-cells = <1>;
>> +
>> +...
>> +
>> +	u2phy: usb2-phy {
>> +		compatible = "rockchip,rk3366-usb2phy";
>> +		#clock-cells = <0>;
>> +		clock-output-names = "sclk_otgphy0_480m";
>> +
>> +		u2phy_otg: otg-port {
>> +			#phy-cells = <0>;
>> +			interrupts = <GIC_SPI 93 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 94 IRQ_TYPE_LEVEL_HIGH>,
>> +				     <GIC_SPI 95 IRQ_TYPE_LEVEL_HIGH>;
>> +			interrupt-names = "otg_id", "otg_bvalid", "linestate";
>> +			status = "okay";
>> +		};
>> +
>> +		u2phy_host: host-port {
>> +			#phy-cells = <0>;
>> +			interrupts = <GIC_SPI 96 IRQ_TYPE_LEVEL_HIGH>;
>> +			interrupt-names = "linestate";
>> +			status = "okay";
>> +		};
>> +	};
>> +};
>
>