linux-kernel - Re: [PATCH] hwspinlock/msm: Add support for Qualcomm MSM HW Mutex block

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Message-ID: <CAK=WgbZSJmMz_U56ZsppBrB64XvTHBqJM4L+uFY1kKxhMCCtMQ@mail.gmail.com>
Date:	Sat, 10 Aug 2013 22:11:56 +0300
From:	Ohad Ben-Cohen <ohad@...ery.com>
To:	Kumar Gala <galak@...eaurora.org>,
	Grant Likely <grant.likely@...retlab.ca>
Cc:	"linux-kernel@...r.kernel.org list" <linux-kernel@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	devicetree@...r.kernel.org, Jeffrey Hugo <jhugo@...eaurora.org>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Eric Holmberg <eholmber@...eaurora.org>
Subject: Re: [PATCH] hwspinlock/msm: Add support for Qualcomm MSM HW Mutex block

+ Grant

On Thu, Aug 1, 2013 at 5:10 PM, Kumar Gala <galak@...eaurora.org> wrote:
>> On Jul 29, 2013, at 4:40 PM, Stephen Boyd wrote:
>>> On 07/29, Kumar Gala wrote:
>>>>> diff --git a/Documentation/devicetree/bindings/arm/msm/tcsr-mutex.txt b/Documentation/devicetree/bindings/arm/msm/tcsr-mutex.txt
>>>>> new file mode 100644
>>>>> index 0000000..ddd6889
>>>>> --- /dev/null
>>>>> +++ b/Documentation/devicetree/bindings/arm/msm/tcsr-mutex.txt
>>>
>>> Maybe this should go under a new hwspinlock directory?
>>
>> Will look for Ohad to comment on this.
>>
>>>
>>>>> @@ -0,0 +1,20 @@
>>>>> +Qualcomm MSM Hardware Mutex Block:
>>>>> +
>>>>> +The hardware block provides mutexes utilized between different processors
>>>>> +on the SoC as part of the communication protocol used by these processors.
>>>>> +
>>>>> +Required properties:
>>>>> +- compatible: should be "qcom,tcsr-mutex"
>>>>> +- reg: Should contain registers location and length of mutex registers
>>>>> +- reg-names:
>>>>> +  "mutex-base"  - string to identify mutex registers
>>>>> +- qcom,num-locks: the number of locks/mutexes supported
>>>>> +
>>>>> +Example:
>>>>> +
>>>>> +  qcom,tcsr-mutex@...84000 {
>>>
>>> Maybe it should be hw-mutex@...84000?
>>
>> again, will look for Ohad to make some comment on this.
>>
>>>>> +          compatible = "qcom,tcsr-mutex";
>>>>> +          reg = <0xfd484000 0x1000>;
>>>>> +          reg-names = "mutex-base";
>>>>> +          qcom,num-locks = <32>;
>>>>> +  };
>
> Ohad, ping.

I'd prefer a DT maintainer to take a look at your two open questions
above, especially if I'm to merge a new file into the devicetree
Documentation folder.

Grant, any chance you have a moment to take a look?

Otherwise, Stephen - do we have your Ack here? I was happy to see your
review but not sure what's the latest status.

Thanks,
Ohad.
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