Message-ID: <CABuKBeLWeKkO4oHj1o8ts+nmhSApvy=xLcrFEQ8nEwUrrtcH1Q@mail.gmail.com>
Date:	Thu, 29 Jan 2015 14:22:38 +0100
From:	Matthias Brugger <matthias.bgg@...il.com>
To:	Sascha Hauer <s.hauer@...gutronix.de>
Cc:	Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>,
	Samuel Ortiz <sameo@...ux.intel.com>,
	YH Chen (陳昱豪) <yh.chen@...iatek.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Henry Chen <henryc.chen@...iatek.com>,
	Rob Herring <robh+dt@...nel.org>,
	Yingjoe Chen (陳英洲) 
	<Yingjoe.Chen@...iatek.com>,
	Eddie Huang <eddie.huang@...iatek.com>,
	Lee Jones <lee.jones@...aro.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	James Liao <jamesjj.liao@...iatek.com>,
	Mike Turquette <mturquette@...aro.org>,
	Stephen Boyd <sboyd@...eaurora.org>
Subject: Re: [PATCH v2] MediaTek PMIC support

2015-01-29 13:39 GMT+01:00 Matthias Brugger <matthias.bgg@...il.com>:
> Hi Sascha,
>
> 2015-01-26 12:47 GMT+01:00 Sascha Hauer <s.hauer@...gutronix.de>:
>> Olof, Arnd,
>>
>> OK to put the driver into drivers/soc/mediatek? Can you take these
>> patches?
>
> How does this patches fit together with the one James clock framework patches?

I forgot to send the link to the patches. Sorry for that. Here you are:
http://lists.infradead.org/pipermail/linux-arm-kernel/2015-January/313793.html

> Both use the same compatible "mediatek,mt8135-infracfg" and
> "mediatek,mt8135-pericfg".
>
> I had a look on other implementations and they attach the reset
> controller to the clk driver, if they share the same hw block.
> Might we run into problems if we implement the clocks in the mfd, as
> we need the clocks early in boot (e.g. for the timer)?
>
> In mt6589 pericfg apart from the clocks and reset controller provides
> registers for AXI bus control and USB wakeup and USB clock selection.
> The infracfg block provides top AXI bus fabric control signals and
> remap registers for the modem.
> Mike, Stephen, what do you think. Can we implement the clk in a mfd
> driver? Or do you prefer to implement the whole block in the clk
> driver?
>
> Cheers,
> Matthias
>
>>
>> Sascha
>>
>> On Fri, Jan 23, 2015 at 03:09:55PM +0100, Sascha Hauer wrote:
>>> This series adds initial support for the MediaTek MT6397 PMIC and the
>>> necessary infrastructure to attach it on the MT8135 / MT8173 SoCs.
>>>
>>> The infrastructure includes:
>>>
>>> - pericfg / infracfg controller support
>>>   The pericfg / infracfg controllers contain miscellaneous registers for
>>>   reset controllers and clocks.
>>>
>>> - PMIC wrapper support
>>>   On MediaTek MT8135, MT8173 and other SoCs the PMIC is connected via
>>>   SPI. The SPI master interface is not directly visible to the CPU, but
>>>   only through the PMIC wrapper inside the SoC. The communication between
>>>   the SoC and the PMIC can optionally be encrypted. Also a non standard
>>>   Dual IO SPI mode can be used to increase speed. The MT8135 also supports
>>>   a special feature named "IP Pairing". With IP Pairing the pins of some
>>>   SoC internal peripherals can be on the PMIC. The signals of these pins
>>>   are routed over the SPI bus using the pwrap bridge. Because of these
>>>   optional non SPI conform features the PMIC driver is not implemented as
>>>   a SPI bus master driver.
>>>
>>> The MT6397 PMIC itself is implemented as a regular mfd device driver which
>>> uses regmap to access the PMIC registers.
>>>
>>> This series also adds regulator support for the MT6397 PMIC.
>>>
>>> The first 6 patches can be merged through the ARM SoC tree. The mfd
>>> patch is independent of the first 6 patches and can be merged through the
>>> mfd maintainer trees.
>>>
>>> Changes since v1:
>>>
>>> - document reset bindings for infracfg/pericfg
>>> - fix base addresses in infracfg binding example
>>> - Remove more Email addresses from Flora Fu (She is not working at
>>>   MediaTek anymore, her address is no longer valid)
>>> - drop Regulator support patch, it's already in next
>>>
>>> Sascha
>>>
>>>
>>> _______________________________________________
>>> linux-arm-kernel mailing list
>>> linux-arm-kernel@...ts.infradead.org
>>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>>>
>>
>> --
>> Pengutronix e.K.                           |                             |
>> Industrial Linux Solutions                 | http://www.pengutronix.de/  |
>> Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0    |
>> Amtsgericht Hildesheim, HRA 2686           | Fax:   +49-5121-206917-5555 |
>
>
>
> --
> motzblog.wordpress.com



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