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

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Date:	Tue, 27 Oct 2015 13:32:18 +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 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.

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


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