Re: [PATCH v8 2/3] mfd: qcom-rpm: Driver for the Qualcomm RPM

From: Bjorn Andersson
Date: Fri Dec 26 2014 - 15:12:05 EST

On Mon, Dec 22, 2014 at 2:50 AM, Paul Bolle <pebolle@xxxxxxxxxx> wrote:
> Hi Bjorn,

Hi Paul

> The Qualcomm RPM regulator driver (see Kconfig symbol
> REGULATOR_QCOM_RPM) was added in v3.18. It depends on the above symbol,
> so it has not yet gotten build coverage. Even manual hacks like
> make -C ../.. M=$PWD CONFIG_REGULATOR_QCOM_RPM=m qcom_rpm-regulator.ko
> won't work for that driver, because it includes linux/mfd/qcom_rpm.h,
> which is not part of the tree.

Correct, but unfortunately Lee Jones awaits devicetree maintainers ack
(or any comment) and have been doing so for months now. I did send out
a ping a few weeks ago, but might have done so when they where
occupied by the merge window.

Lee, the Qualcomm RPM binding is not for a subsystem and is limited to
Qualcomm devices. Could we apply this in accordance with II.2 in
Documentation/devicetree/bindings/submitting-patches.txt or is there
anything I could do to make you feel comfortable doing so?

> It seems there's no generally agreed upon guideline for situations like
> this. So I guess it's up to Mark to decide how long the tree should
> include an unbuildable driver.

I haven't seen any guidelines, but appreciate Mark's way of working in
this matter - as we've been able to run our devices with fewer
out-of-tree patches.

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