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From: James Liao <jamesjj.liao@mediatek.com>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
	Mike Turquette <mturquette@linaro.org>,
	Stephen Boyd <sboyd@codeaurora.org>,
	<srv_heupstream@mediatek.com>,
	Eddie Huang <eddie.huang@mediatek.com>,
	"Henry Chen" <henryc.chen@mediatek.com>,
	Yingjoe Chen <yingjoe.chen@mediatek.com>,
	Daniel Kurtz <djkurtz@chromium.org>,
	Ricky Liang <jcliang@chromium.org>,
	Rob Herring <robh+dt@kernel.org>,
	Sascha Hauer <kernel@pengutronix.de>,
	<devicetree@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-kernel@vger.kernel.org>,
	<linux-mediatek@lists.infradead.org>
Subject: Re: [PATCH 3/5] dt-bindings: ARM: Mediatek: Document devicetree bindings for clock controllers
Date: Tue, 26 May 2015 16:55:36 +0800	[thread overview]
Message-ID: <1432630536.15597.16.camel@mtksdaap41> (raw)
In-Reply-To: <20150526075643.GF6325@pengutronix.de>

Hi Sascha,

On Tue, 2015-05-26 at 09:56 +0200, Sascha Hauer wrote:
> On Thu, May 21, 2015 at 03:12:54PM +0800, James Liao wrote:
> > This adds the binding documentation for the mmsys, imgsys, vdecsys,
> > vencsys and vencltsys controllers found on Mediatek SoCs.
> > 
> > index 0000000..a5b94a7
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,vdecsys.txt
> > +++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,vencltsys.txt
> > +++ b/Documentation/devicetree/bindings/arm/mediatek/mediatek,vencsys.txt
> 
> Do these really become multiple drivers so that it's worth abstracting
> them in the clock framework?

These clocks need to be controlled among several drivers. For example,
vdecsys clocks will be controlled by VDEC driver (not ready yet) and
MT8173 SMI driver [1]. That means these clocks need a mechanism to share
between these 2 drivers. CCF share clocks by using of reference count,
so I think it's suitable to implement these subsystem clocks.

As I know SMI driver need to access clocks among mmsys, imgsys, vdecsys,
vencsys and vencltsys. So in this patch I added clocks of these
subsystems into CCF.

[1]
http://lists.infradead.org/pipermail/linux-mediatek/2015-March/000058.html


Best regards,

James



  reply	other threads:[~2015-05-26  8:56 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-21  7:12 [PATCH 0/5] Add Mediatek MT8173 subsystem clocks support James Liao
2015-05-21  7:12 ` [PATCH 1/5] clk: mediatek: Fix apmixedsys clock registration James Liao
2015-05-26  7:42   ` Sascha Hauer
2015-06-04 21:07   ` Stephen Boyd
2015-05-21  7:12 ` [PATCH 2/5] clk: mediatek: mt8173: Fix enabling of critical clocks James Liao
2015-05-26  7:46   ` Sascha Hauer
2015-05-26  8:36     ` James Liao
2015-05-21  7:12 ` [PATCH 3/5] dt-bindings: ARM: Mediatek: Document devicetree bindings for clock controllers James Liao
2015-05-26  7:56   ` Sascha Hauer
2015-05-26  8:55     ` James Liao [this message]
2015-05-26 11:08       ` Sascha Hauer
2015-05-27  6:12         ` Yong Wu
2015-05-27  7:27           ` Sascha Hauer
2015-05-28  5:14             ` Yong Wu
2015-05-21  7:12 ` [PATCH 4/5] clk: mediatek: Add subsystem clocks of MT8173 James Liao
2015-05-22  4:22   ` Daniel Kurtz
2015-05-22  6:03     ` James Liao
2015-06-12 17:09   ` Matthias Brugger
2015-06-15  2:10     ` James Liao
2015-05-21  7:12 ` [PATCH 5/5] clk: mediatek: Add USB clock support in MT8173 APMIXEDSYS James Liao
2015-05-26  8:05   ` Sascha Hauer
2015-05-26  9:11     ` James Liao
2015-05-26  9:41       ` Sascha Hauer
2015-05-26  9:58         ` James Liao
2015-05-28 13:24 ` [PATCH 0/5] Add Mediatek MT8173 subsystem clocks support Sascha Hauer
2015-05-29  2:47   ` James Liao
2015-05-29  6:23     ` Sascha Hauer
2015-06-04 21:02       ` Stephen Boyd
2015-06-05  1:45         ` James Liao
2015-06-06  0:59           ` Stephen Boyd
2015-06-08  7:27             ` James Liao
2015-06-08  7:48             ` Sascha Hauer
2015-06-11 23:52               ` Stephen Boyd
2015-06-12 17:05                 ` Matthias Brugger

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