linux-kernel - Re: [PATCH v1 1/2] dt-bindings: Sync the dts to this document

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Message-ID: <CAL_JsqJcwWkMXQzo6PbO2kfv3h7hkqtq6CJW0+W4Wc3eh6RTuQ@mail.gmail.com>
Date:	Wed, 21 Oct 2015 11:48:00 -0500
From:	Rob Herring <robh+dt@...nel.org>
To:	Caesar Wang <caesar.upstream@...il.com>
Cc:	Caesar Wang <wxt@...k-chips.com>,
	Mark Rutland <mark.rutland@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Heiko Stuebner <heiko@...ech.de>,
	Pawel Moll <pawel.moll@....com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	Doug Anderson <dianders@...omium.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Eduardo Valentin <edubezval@...il.com>,
	linux-rockchip@...ts.infradead.org,
	Kumar Gala <galak@...eaurora.org>,
	Zhang Rui <rui.zhang@...el.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v1 1/2] dt-bindings: Sync the dts to this document

On Wed, Oct 21, 2015 at 10:45 AM, Caesar Wang <caesar.upstream@...il.com> wrote:
> Hi Rob,
>
> 在 2015年10月21日 23:18, Rob Herring 写道:
>>
>> On Tue, Oct 20, 2015 at 9:42 PM, Caesar Wang <wxt@...k-chips.com> wrote:
>>>
>>> Add the OTP gpio state, we need switch the pin to gpio state
>>> before the TSADC controller is reset.
>>>
>>> Signed-off-by: Caesar Wang <wxt@...k-chips.com>
>>> ---
>>>
>>> Changes in v1:
>>>    - As the Doug comments, add the 'init' property to sync document.
>>>
>>>   Documentation/devicetree/bindings/thermal/rockchip-thermal.txt | 5
>>> +++--
>>>   1 file changed, 3 insertions(+), 2 deletions(-)
>>>
>>> diff --git
>>> a/Documentation/devicetree/bindings/thermal/rockchip-thermal.txt
>>> b/Documentation/devicetree/bindings/thermal/rockchip-thermal.txt
>>> index ef802de..28e84f7 100644
>>> --- a/Documentation/devicetree/bindings/thermal/rockchip-thermal.txt
>>> +++ b/Documentation/devicetree/bindings/thermal/rockchip-thermal.txt
>>> @@ -27,8 +27,9 @@ tsadc: tsadc@...80000 {
>>>          clock-names = "tsadc", "apb_pclk";
>>>          resets = <&cru SRST_TSADC>;
>>>          reset-names = "tsadc-apb";
>>> -       pinctrl-names = "default";
>>> -       pinctrl-0 = <&otp_out>;
>>> +       pinctrl-names = "init", "default";
>>> +       pinctrl-0 = <&otp_gpio>;
>>> +       pinctrl-1 = <&otp_out>;
>>
>> Are these optional or required? They only appear in the example.
>
>
> Yep,
> These are required for TSADC.

Then list them that way.

>
> I‘m assumed that's right,
> I think we don't need to introduce the pinctrl in this document.

You need to state that you use them and what valid names are. That is
a contract with the driver.

The example is extra information and should not be required to write a
dts entry.

Rob
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