linux-kernel - Re: [PATCH v3 1/2] Documentation: bindings: add DT documentation for Rockchip USB2PHY

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Date:	Tue, 7 Jun 2016 16:23:26 +0800
From:	Frank Wang <frank.wang@...k-chips.com>
To:	Kishon Vijay Abraham I <kishon@...com>,
	Heiko Stübner <heiko@...ech.de>,
	Mark Rutland <mark.rutland@....com>
Cc:	dianders@...omium.org, linux@...ck-us.net, groeck@...omium.org,
	jwerner@...omium.org, robh+dt@...nel.org, pawel.moll@....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,
	xzy.xu@...k-chips.com, kever.yang@...k-chips.com,
	huangtao@...k-chips.com, william.wu@...k-chips.com,
	frank.wang@...k-chips.com
Subject: Re: [PATCH v3 1/2] Documentation: bindings: add DT documentation for
 Rockchip USB2PHY

Hi Kishon & Heiko,

On 2016/6/7 15:45, Kishon Vijay Abraham I wrote:
> Hi,
>
> On Tuesday 07 June 2016 09:01 AM, Frank Wang wrote:
>> Hi Heiko,
>>
>> On 2016/6/7 10:59, Frank Wang wrote:
>>> Hi Heiko & Mark,
>>>
>>> On 2016/6/6 20:33, Heiko Stübner wrote:
>>>> Am Montag, 6. Juni 2016, 12:27:54 schrieb Mark Rutland:
>>>>> On Mon, Jun 06, 2016 at 05:20:03PM +0800, Frank Wang wrote:
>>>>>> Signed-off-by: Frank Wang <frank.wang@...k-chips.com>
>>>>>> ---
>>>>>>
>>>>>> Changes in v3:
>>>>>>    - Added 'clocks' and 'clock-names' optional properties.
>>>>>>    - Specified 'otg-port' and 'host-port' as the sub-node name.
>>>>>>
>>>>>> 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        | 60
>>>>>>    ++++++++++++++++++++ 1 file changed, 60 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..0b4bbbb
>>>>>> --- /dev/null
>>>>>> +++ b/Documentation/devicetree/bindings/phy/phy-rockchip-inno-usb2.txt
>>>>>> @@ -0,0 +1,60 @@
>>>>>> +ROCKCHIP USB2.0 PHY WITH INNO IP BLOCK
>>>>>> +
>>>>>> +Required properties (phy (parent) node):
>>>>>> + - compatible : should be one of the listed compatibles:
>>>>>> +    * "rockchip,rk3366-usb2phy"
>>>>>> +    * "rockchip,rk3399-usb2phy"
>>>>>> + - #clock-cells : should be 0.
>>>>>> + - clock-output-names : specify the 480m output clock name.
>>>>>> +
>>>>>> +Optional properties:
>>>>>> + - clocks : phandle + phy specifier pair, for the input clock of phy.
>>>>>> + - clock-names : input clock name of phy, must be "phyclk".
>>>>>> + - vbus_host-supply : phandle to a regulator that supplies host vbus.
>>>>>> + - vbus_otg-supply : phandle to a regulator that supplies otg vbus.
>>>>> Nit: s/_/-/ here.
>>>> Something I only stumbled over yesterday for the first time on my rk3288-
>>>> popmetal: The phy subnodes seem to be able to use a generic phy-supply
>>>> property from inside the phy-core itself, see:
>>>>
>>>> https://github.com/mmind/linux-rockchip/commit/93739f521fc65f44524b00c9aaf6db46bca94e02#diff-ddf3e45ebb753d6debf57022003a1a57R597
>>>>
>>>>
>>>> for my WIP code for that other board.
>>>>
>>> Ah, good comments! I will try later, if it is practicable, I shall correct it
>>> into the next patches (patch v4).
>>>
>> I am sorry to tell you that seems unworkable, because we have two sub-nodes
>> (phy-ports) in one parent-node (phy),
>> what is more, the 'phy-supply' property can only put into parent-node, I
>> believe it can not be differentiated types of ports.
> 'phy-supply' is a property of the phy node and not the 'phy-provider' node. So
> IMO this should work. What problem do you see?

Sorry, I think I must have made a wrong phandle of phy-port name in 
*.dts before.
Yes, It works now, thanks for your reminding.

@Heiko,
I have just received your another mail, thanks again for your detail 
explanation.

I will correct it in the next patches (patch v4).

BR.
Frank