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

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Date:   Thu, 28 Feb 2019 08:10:55 +0000
From:   Lee Jones <lee.jones@...aro.org>
To:     Matti Vaittinen <matti.vaittinen@...rohmeurope.com>
Cc:     mazziesaccount@...il.com, Guenter Roeck <linux@...ck-us.net>,
        heikki.haikola@...rohmeurope.com, mikko.mutanen@...rohmeurope.com,
        robh+dt@...nel.org, mark.rutland@....com, broonie@...nel.org,
        gregkh@...uxfoundation.org, rafael@...nel.org,
        mturquette@...libre.com, sboyd@...nel.org,
        linus.walleij@...aro.org, bgolaszewski@...libre.com,
        sre@...nel.org, lgirdwood@...il.com, a.zummo@...ertech.it,
        alexandre.belloni@...tlin.com, wim@...ux-watchdog.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-clk@...r.kernel.org, linux-gpio@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-rtc@...r.kernel.org,
        linux-watchdog@...r.kernel.org, bogdan-petru.chircu-mare@....com
Subject: Re: [PATCH v10 0/9] support ROHM BD70528 PMIC

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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