linux-kernel - Re: [PATCH 2/3 v3] Documentation: dt: add the CSR atlas7 hwspinlock bindings document

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Date:	Tue, 26 May 2015 12:02:57 -0500
From:	Suman Anna <s-anna@...com>
To:	Barry Song <21cnbao@...il.com>
CC:	Ohad Ben-Cohen <ohad@...ery.com>,
	LKML <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	DL-SHA-WorkGroupLinux <workgroup.linux@....com>,
	Wei Chen <wei.chen@....com>, Bjorn Andersson <bjorn@...o.se>,
	Barry Song <Baohua.Song@....com>
Subject: Re: [PATCH 2/3 v3] Documentation: dt: add the CSR atlas7 hwspinlock
 bindings document

On 05/25/2015 12:33 AM, Barry Song wrote:
> 2015-05-23 6:44 GMT+08:00 Suman Anna <s-anna@...com>:
>> Hi Barry,
>>
>> On 05/19/2015 01:41 AM, Barry Song wrote:
>>> From: Wei Chen <wei.chen@....com>
>>>
>>> The Hardware Spinlock device on atlas7 provides hardware assistance
>>> for synchronization between the multiple processors in the system
>>> (dual Cortex-A7, CAN bus Cortex-M3 and audio DSP).
>>> This patch adds the DT bindings information for this hwspinlock
>>> module.
>>>
>>> Cc: Suman Anna <s-anna@...com>
>>> Cc: Bjorn Andersson <bjorn@...o.se>
>>> Signed-off-by: Wei Chen <wei.chen@....com>
>>> Signed-off-by: Barry Song <Baohua.Song@....com>
>>> ---
>>>  .../devicetree/bindings/hwlock/sirf,hwspinlock.txt | 25 ++++++++++++++++++++++
>>>  1 file changed, 25 insertions(+)
>>>  create mode 100644 Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt
>>>
>>> diff --git a/Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt b/Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt
>>> new file mode 100644
>>> index 0000000..cc6d351
>>> --- /dev/null
>>> +++ b/Documentation/devicetree/bindings/hwlock/sirf,hwspinlock.txt
>>> @@ -0,0 +1,25 @@
>>> +SIRF Hardware spinlock device Binding
>>> +-----------------------------------------------
>>> +
>>> +Required properties :
>>> +- compatible : shall contain only one of the following:
>>> +     "sirf,hwspinlock"
>>> +
>>> +- reg : the register address of hwspinlock
>>
>> Also suggest to document the value to be used for #hwlock-cells, the
>> generic hwlock binding does not mention that.
> 
> do you think whether we can put one line like?
> 
> #hwlock-cells : <1>, as required by generic hwspinlock binding.

The generic hwspinlock binding does not require a specific value, that
is something determined by the individual platform implementation. So,
something like "#hwlock-cells: Should be 1" is fine.

regards
Suman

>>
>>> +
>>> +Please look at the generic hwlock binding for usage information for consumers,
>>> +"Documentation/devicetree/bindings/hwlock/hwlock.txt"
>>> +
>>
>> regards
>> Suman
>>
> 
> -barry
> 

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