linux-kernel - Re: [PATCH v5 1/3] mfd: Add support for Cherry Trail Dollar Cove TI PMIC

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Message-ID: <20170905081049.r3gbdtr2iuom6uk6@dell>
Date:   Tue, 5 Sep 2017 09:10:49 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Johannes Stezenbach <js@...21.net>,
        Hans de Goede <hdegoede@...hat.com>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        platform-driver-x86@...r.kernel.org, linux-acpi@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v5 1/3] mfd: Add support for Cherry Trail Dollar Cove TI
 PMIC

On Tue, 05 Sep 2017, Takashi Iwai wrote:

> On Tue, 05 Sep 2017 09:24:51 +0200,
> Lee Jones wrote:
> > 
> > On Mon, 04 Sep 2017, Takashi Iwai wrote:
> > 
> > > This patch adds the MFD driver for Dollar Cove (TI version) PMIC with
> > > ACPI INT33F5 that is found on some Intel Cherry Trail devices.
> > > The driver is based on the original work by Intel, found at:
> > >   https://github.com/01org/ProductionKernelQuilts
> > > 
> > > This is a minimal version for adding the basic resources.  Currently,
> > > only ACPI PMIC opregion and the external power-button are used.
> > > 
> > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=193891
> > > Reviewed-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> > > Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>
> > > Signed-off-by: Takashi Iwai <tiwai@...e.de>
> > > ---
> > > v4->v5:
> > > * Minor coding-style fixes suggested by Lee
> > > * Put GPL text
> > > v3->v4:
> > > * no change for this patch
> > > v2->v3:
> > > * Rename dc_ti with chtdc_ti in all places
> > > * Driver/kconfig renames accordingly
> > > * Added acks by Andy and Mika
> > > v1->v2:
> > > * Minor cleanups as suggested by Andy
> > > 
> > >  drivers/mfd/Kconfig                   |  13 +++
> > >  drivers/mfd/Makefile                  |   1 +
> > >  drivers/mfd/intel_soc_pmic_chtdc_ti.c | 184 ++++++++++++++++++++++++++++++++++
> > >  3 files changed, 198 insertions(+)
> > >  create mode 100644 drivers/mfd/intel_soc_pmic_chtdc_ti.c
> > 
> > For my own reference:
> >   Acked-for-MFD-by: Lee Jones <lee.jones@...aro.org>
> 
> Thanks!
> 
> Now the question is how to deal with these.  It's no critical things,
> so I'm OK to postpone for 4.15.  OTOH, it's really a new
> device-specific stuff, thus it can't break anything else, and it'd be
> fairly safe to add it for 4.14 although it's at a bit late stage.

Yes, you are over 2 weeks late for v4.14.  It will have to be v4.15.

> IMO, it'd be great if you can carry all stuff through MFD tree; or
> create an immutable branch (again).  But how to handle it, when to do
> it, It's all up to you guys.

If there aren't any build dependencies between the patches, each of
the patches should be applied through their own trees.  What are the
build-time dependencies?  Are there any?

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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