Re: [PATCH v10 0/9] support ROHM BD70528 PMIC

From: Lee Jones <lee.jones@linaro.org>
To: Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
Cc: mazziesaccount@gmail.com, Guenter Roeck <linux@roeck-us.net>,
	heikki.haikola@fi.rohmeurope.com,
	mikko.mutanen@fi.rohmeurope.com, robh+dt@kernel.org,
	mark.rutland@arm.com, broonie@kernel.org,
	gregkh@linuxfoundation.org, rafael@kernel.org,
	mturquette@baylibre.com, sboyd@kernel.org,
	linus.walleij@linaro.org, bgolaszewski@baylibre.com,
	sre@kernel.org, lgirdwood@gmail.com, a.zummo@towertech.it,
	alexandre.belloni@bootlin.com, wim@linux-watchdog.org,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-clk@vger.kernel.org, linux-gpio@vger.kernel.org,
	linux-pm@vger.kernel.org, linux-rtc@vger.kernel.org,
	linux-watchdog@vger.kernel.org, bogdan-petru.chircu-mare@nxp.com
Subject: Re: [PATCH v10 0/9] support ROHM BD70528 PMIC
Date: Thu, 28 Feb 2019 08:10:55 +0000	[thread overview]
Message-ID: <20190228081055.GL4118@dell> (raw)
In-Reply-To: <20190228070450.GB3773@localhost.localdomain>

On Thu, 28 Feb 2019, Matti Vaittinen wrote:

> Hello Lee and Mark,
> 
> On Thu, Feb 14, 2019 at 03:02:37PM +0200, Matti Vaittinen wrote:
> > Patch series introducing support for ROHM BD70528 PMIC
> > 
> > ROHM BD70528 is a programmable Power Management IC for battery
> > powered 'ultra low power' systems like the pre-announced NXP
> > i.MX7 ULP. This patch series introduces support for the PMIC. Please
> > note that this driver only supports HW setup where PMIC is connected
> > to I2C on A7 core. The other scenario is to use M4 as a power manager
> > and connect pmic to M4. On such setups the A7 can only access pmic
> > via M4 core using RPMSG virtio. Such setup depends on RPMSG
> > implementation on M4 core and is currently not supported by this
> > patch series.
> > 
> 
> I was wondering if there is anything that could be done to allow the MFD
> part of this series to end up in upstream without having to wait the
> regmap-irq changes
> (https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git/commit/?h=topic/irq)
>  to be merged from Linus' tree to MFD tree? If I see it correctly, the
> regmap-irq (main-irq-reg support) changes are not targeted to linux 5.1.
> To me it looks like getting them to MFD via Linus' tree will take a while.
> 
> The MFD part depends on the regmap-irq changes and I think that most
> other subsystems want to have the MFD changes in before taking rest of
> the driver in their trees. So it will be a while untill all the changes
> are in. It would really be nice to have the drive in-tree sooner - hence
> I ask if theres a way. (I don't want to push, just ask if it is possible :])

It's possible, so long as there aren't any build-time dependencies
between the subsystems.  Immediate acceptance however isn't possible
due to the impending merge-window which opens in 3 days.

-- 
Lee Jones [李琼斯]
Linaro Services Technical Lead
Linaro.org │ Open source software for ARM SoCs
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