linux-kernel - Re: [PATCH 1/2] thermal: broadcom: Allow for NSP to use ns-thermal driver

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Message-ID: <CAC3K-4pr4LY-9unHNxMDN9YmCYHKekUo66813OUdiKkQH4QzVw@mail.gmail.com>
Date:   Thu, 27 Apr 2017 13:42:25 -0400
From:   Jon Mason <jon.mason@...adcom.com>
To:     Eduardo Valentin <edubezval@...il.com>
Cc:     Florian Fainelli <florian.fainelli@...adcom.com>,
        Zhang Rui <rui.zhang@...el.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        BCM Kernel Feedback <bcm-kernel-feedback-list@...adcom.com>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-pm@...r.kernel.org,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH 1/2] thermal: broadcom: Allow for NSP to use ns-thermal driver

On Thu, Apr 27, 2017 at 12:37 PM, Eduardo Valentin <edubezval@...il.com> wrote:
> Hey Jason,

It's Jon :)

>
> On Tue, Apr 25, 2017 at 04:49:10PM -0400, Jon Mason wrote:
>> Change the iProc Kconfig to select THERMAL and THERMAL_OF, which allows
>> the ns-thermal driver to be selected via menuconfig.  Also, change the
>> ns-thermal driver to work on any iProc based SoC.  Finally, tweak the
>> Kconfig description to mention support for NSP and make the default on
>> for iProc based platforms.
>
>
> Thanks for the patch, but..
>>
>> Signed-off-by: Jon Mason <jon.mason@...adcom.com>
>> ---
>>  arch/arm/mach-bcm/Kconfig        | 2 ++
>>  drivers/thermal/broadcom/Kconfig | 9 +++++----
>>  2 files changed, 7 insertions(+), 4 deletions(-)
>>
>> diff --git a/arch/arm/mach-bcm/Kconfig b/arch/arm/mach-bcm/Kconfig
>> index a0e66d8..da2bfeb 100644
>> --- a/arch/arm/mach-bcm/Kconfig
>> +++ b/arch/arm/mach-bcm/Kconfig
>> @@ -19,6 +19,8 @@ config ARCH_BCM_IPROC
>>       select GPIOLIB
>>       select ARM_AMBA
>>       select PINCTRL
>> +     select THERMAL
>> +     select THERMAL_OF
>>       help
>>         This enables support for systems based on Broadcom IPROC architected SoCs.
>>         The IPROC complex contains one or more ARM CPUs along with common
>
> It would be better if this is split and sent through your arch tree, to
> avoid conflicts. I could also pick it if you get an ack from one of your
> maintainers. Still, first option is preferable.

Sure, I'll be happy to split this off.  I should've thought to split
it up before sending.  Thanks for the suggestion.

>
>> diff --git a/drivers/thermal/broadcom/Kconfig b/drivers/thermal/broadcom/Kconfig
>> index f0dea8a..26d706c 100644
>> --- a/drivers/thermal/broadcom/Kconfig
>> +++ b/drivers/thermal/broadcom/Kconfig
>> @@ -1,8 +1,9 @@
>>  config BCM_NS_THERMAL
>>       tristate "Northstar thermal driver"
>>       depends on ARCH_BCM_IPROC || COMPILE_TEST
>> +     default ARCH_BCM_IPROC
>
> Not sure if this is really what you wanted. Based on your commit log
> message, you meant the following, perhaps?
>
>  +      default y if ARCH_BCM_IPROC

IIUC, my original default works, as we have used it frequently in
other places in the kernel.
grep -rI "default ARCH_BCM_IPROC" * | wc -l
15

However, if the above is preferred (or the other 15 massively broken),
I'll be happy to do it that way.


>>       help
>> -       Northstar is a family of SoCs that includes e.g. BCM4708, BCM47081,
>> -       BCM4709 and BCM47094. It contains DMU (Device Management Unit) block
>> -       with a thermal sensor that allows checking CPU temperature. This
>> -       driver provides support for it.
>> +       Support for the Northstar and Northstar Plus family of SoCs (e.g.
>> +       BCM4708, BCM4709, BCM5301x, BCM95852X, etc). It contains DMU (Device
>
> Did we look BCM47094 somehow on this patch?

Naa, just trying to be more concise, while adding the NSP products to
the list..  BCM47094 is a type of BCM4709.  So, it is still there :)

>
>> +       Management Unit) block with a thermal sensor that allows checking CPU
>> +       temperature.
>> --
>> 2.7.4
>>