linux-kernel - Re: [PATCH v2] hwspinlock/msm: Add support for Qualcomm MSM HW Mutex block

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Message-ID: <5401174F.8040508@codeaurora.org>
Date:	Fri, 29 Aug 2014 17:14:07 -0700
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	Courtney Cavin <courtney.cavin@...ymobile.com>,
	Bjorn Andersson <bjorn.andersson@...ymobile.com>
CC:	Ohad Ben-Cohen <ohad@...ery.com>,
	Kumar Gala <galak@...eaurora.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Grant Likely <grant.likely@...aro.org>,
	Suman Anna <s-anna@...com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	Jeffrey Hugo <jhugo@...eaurora.org>,
	Eric Holmberg <eholmber@...eaurora.org>
Subject: Re: [PATCH v2] hwspinlock/msm: Add support for Qualcomm MSM HW Mutex
 block

On 08/29/14 16:41, Courtney Cavin wrote:
> On Sat, Aug 30, 2014 at 01:14:23AM +0200, Bjorn Andersson wrote:
>> From: Kumar Gala <galak@...eaurora.org>
>>
>> Add driver for Qualcomm MSM Hardware Mutex block that exists on
>> newer Qualcomm SoCs.
>>
>> Cc: Jeffrey Hugo <jhugo@...eaurora.org>
>> Cc: Eric Holmberg <eholmber@...eaurora.org>
>> Cc: Courtney Cavin <courtney.cavin@...ymobile.com>
>> Signed-off-by: Kumar Gala <galak@...eaurora.org>
>> [bjorn: added pm_runtime calls, from Courtney,
>> 	added sfpb-mutex compatible,
>> 	updated DT binding documentation formatting]
>> Signed-off-by: Bjorn Andersson <bjorn.andersson@...ymobile.com>
>> ---
> [...]
>> diff --git a/drivers/hwspinlock/Kconfig b/drivers/hwspinlock/Kconfig
>> index 3612cb5..2cd39e2 100644
>> --- a/drivers/hwspinlock/Kconfig
>> +++ b/drivers/hwspinlock/Kconfig
>> @@ -8,6 +8,17 @@ config HWSPINLOCK
>>  
>>  menu "Hardware Spinlock drivers"
>>  
>> +config HWSPINLOCK_MSM
>> +	tristate "MSM Hardware Spinlock device"
>> +	depends on ARCH_QCOM
> This should also depend on OF, as it won't compile or work without it.

Doesn't ARCH_QCOM imply OF? ARCH_MULTIPLATFORM has a select USE_OF.

>
>> +	select HWSPINLOCK
>> +	help
>> +	  Say y here to support the MSM Hardware Mutex functionality, which
>> +	  provides a synchronisation mechanism for the various processors on
>> +	  the SoC.
>> +
>> +	  If unsure, say N.
>> +
>>

Maybe MSM should be changed to qcom? Just a thought.

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
hosted by The Linux Foundation

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