linux-kernel - Re: [PATCH v4 1/3] soc: devicetree: bindings: Add Qualcomm RPM DT binding

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Message-ID: <CAMf-jSkvC4P8-06XbmMH2i0xHvaYwH_VbfG6Ypp3F+ct5ZxM+A@mail.gmail.com>
Date:	Thu, 17 Jul 2014 21:34:37 +0530
From:	pramod gurav <pramod.gurav.etc@...il.com>
To:	Bjorn Andersson <bjorn@...o.se>
Cc:	Bjorn Andersson <bjorn.andersson@...ymobile.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	linux-arm-msm <linux-arm-msm@...r.kernel.org>
Subject: Re: [PATCH v4 1/3] soc: devicetree: bindings: Add Qualcomm RPM DT binding

On Thu, Jul 17, 2014 at 3:50 AM, Bjorn Andersson <bjorn@...o.se> wrote:
>> On Wed, Jul 16, 2014 at 4:30 AM, Bjorn Andersson
>> <bjorn.andersson@...ymobile.com> wrote:
> [...]
>>> +       rpm@...000 {
>>> +               compatible = "qcom,rpm-msm8960";
>>> +               reg = <0x108000 0x1000>;
>>> +               qcom,ipc = <&apcs 0x8 2>;
>>
>> Tried adding this but there is no reference to 'apcs' registers itself
>> in any dts.
>>
>> Without these changes rpm breaks hence not able to test SATA which needs rpm.
>>
>
> Hi Pramod,
>
> Unfortunately the ipc bits resides in a block that needs to be
> accesses by various device drivers so I had to extract the access; so
> you now need to reference it via a syscon handle and offset instead -
> as described above.
>
> The apcs node I used for testing this with looks like this:
>
> apcs: syscon@...1000 {
>     compatible = "syscon";
>     reg = <0x2011000 0x1000>;
> };
>
> Enable CONFIG_MFD_SYSCON and put the dt snippet somewhere under soc
> and you should be good.
>

Thanks Bjorn. Did this and seen things working (sata atleast).

> Regards,
> Bjorn



-- 
Thanks and Regards
Pramod
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