linux-kernel - Re: [PATCH 1/3] dt-bindings: add document of mediatek efuse driver

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Message-ID: <1445938075.22398.3.camel@mtksdaap41>
Date:	Tue, 27 Oct 2015 17:27:55 +0800
From:	andrew-ct chen <andrew-ct.chen@...iatek.com>
To:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
CC:	Sascha Hauer <s.hauer@...gutronix.de>,
	Maxime Ripard <maxime.ripard@...e-electrons.com>,
	Rob Herring <robh+dt@...nel.org>,
	"Pawel Moll" <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	"Ian Campbell" <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Matthias Brugger <matthias.bgg@...il.com>,
	<devicetree@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-mediatek@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, <srv_heupstream@...iatek.com>
Subject: Re: [PATCH 1/3] dt-bindings: add document of mediatek efuse driver

On Tue, 2015-10-27 at 13:32 +0800, andrew-ct chen wrote:
> On Mon, 2015-10-26 at 10:55 +0000, Srinivas Kandagatla wrote:
> > 
> > On 26/10/15 10:23, Sascha Hauer wrote:
> > > On Mon, Oct 26, 2015 at 09:56:14AM +0000, Srinivas Kandagatla wrote:
> > >>
> > >>
> > >> On 16/10/15 09:39, andrew-ct.chen@...iatek.com wrote:
> > >>> From: Andrew-CT Chen <andrew-ct.chen@...iatek.com>
> > >>>
> > >>> Add Mediatek MT8173 EFUSE Devicetree binding file
> > >>>
> > >>> Signed-off-by: Andrew-CT Chen <andrew-ct.chen@...iatek.com>
> > >>
> > >> Looks good to me, minor comment below.
> > >>
> > >> Will queue this for v4.5 once v4.4-rc1 is released.
> > >>
> > >>
> > >>> ---
> > >>>   .../devicetree/bindings/nvmem/mtk-efuse.txt        | 36 ++++++++++++++++++++++
> > >>>   1 file changed, 36 insertions(+)
> > >>>   create mode 100644 Documentation/devicetree/bindings/nvmem/mtk-efuse.txt
> > >>>
> > >>> diff --git a/Documentation/devicetree/bindings/nvmem/mtk-efuse.txt b/Documentation/devicetree/bindings/nvmem/mtk-efuse.txt
> > >>> new file mode 100644
> > >>> index 0000000..92edc3d
> > >>> --- /dev/null
> > >>> +++ b/Documentation/devicetree/bindings/nvmem/mtk-efuse.txt
> > >>> @@ -0,0 +1,36 @@
> > >>> += Mediatek MTK-EFUSE device tree bindings =
> > >>> +
> > >>> +This binding is intended to represent MTK-EFUSE which is found in most Mediatek SOCs.
> > >>> +
> > >>> +Required properties:
> > >>> +- compatible: should be "mediatek,mt8173-efuse" or "mediatek,mt8135-efuse"
> > >>
> > >> Can we make the compatible more generic for mediatek socs? Like
> > >> "mediatek,efuse"  Or are they different in each SOC?
> > >
> > > While we can add an additional "mediatek,efuse" compatible we should
> > > always add the most specific compatible first. Otherwise we cannot
> > > differentiate between SoCs later without changing the device tree.
> > Yes, that’s correct.
> > 
> > AFAIK, Ideally the driver should have more generic compatible string 
> > unless there is any SOC specific thing, and DT can still use the order 
> > of specific, generic compatible strings. If not we would end up adding 
> > compatible strings into the driver for every new SOC.
> 
> We will modify for generic compatible string like "mediatek,efuse" and
> rebase it to v4.4-rc1.

For more clearly, we will modify the compatible string to
"mediatek,mt8173-efuse" and "mediatek,efuse".

> 
> > 
> > --srini
> > 
> > >
> > > Sascha
> > >
> 


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