linux-kernel - Re: [linux-sunxi] Re: [PATCH v2 1/5] ARM: dts: sun8i: Add SID node

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Date:	Tue, 24 Nov 2015 10:32:02 +0100
From:	Maxime Ripard <maxime.ripard@...e-electrons.com>
To:	Sugar Wu <shugelinux@...il.com>
Cc:	linux-sunxi <linux-sunxi@...glegroups.com>, atx@....name,
	linux-clk@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org, gpatchesrdh@...as.com,
	mturquette@...aro.org, hdegoede@...hat.com, sboyd@...eaurora.org,
	mturquette@...libre.com, emilio@...pez.com.ar,
	linux@....linux.org.uk, edubezval@...il.com, rui.zhang@...el.com,
	wens@...e.org, galak@...eaurora.org, ijc+devicetree@...lion.org.uk,
	mark.rutland@....com, pawel.moll@....com, robh+dt@...nel.org
Subject: Re: [linux-sunxi] Re: [PATCH v2 1/5] ARM: dts: sun8i: Add SID node

On Mon, Nov 23, 2015 at 10:51:15PM -0800, Sugar Wu wrote:
> On Monday, November 23, 2015 at 8:43:59 PM UTC+8, Maxime Ripard wrote:
> >
> > Hi, 
> >
> > On Mon, Nov 23, 2015 at 09:02:48AM +0100, Josef Gajdusek wrote: 
> > > Add a node describing the Security ID memory to the 
> > > Allwinner H3 .dtsi file. 
> > > 
> > > Signed-off-by: Josef Gajdusek <a...@....name <javascript:>> 
> > > --- 
> > >  arch/arm/boot/dts/sun8i-h3.dtsi | 7 +++++++ 
> > >  1 file changed, 7 insertions(+) 
> > > 
> > > diff --git a/arch/arm/boot/dts/sun8i-h3.dtsi 
> > b/arch/arm/boot/dts/sun8i-h3.dtsi 
> > > index 0faa38a..58de718 100644 
> > > --- a/arch/arm/boot/dts/sun8i-h3.dtsi 
> > > +++ b/arch/arm/boot/dts/sun8i-h3.dtsi 
> > > @@ -359,6 +359,13 @@ 
> > >                          #size-cells = <0>; 
> > >                  }; 
> > >   
> > > +                sid: eeprom@...14000 { 
> > > +                        compatible = "allwinner,sun4i-a10-sid"; 
> > > +                        reg = <0x01c14000 0x400>; 
> >
> > The datasheet says it's 256 bytes wide, while the size here is of 1kB, 
> > is it intentional? 
> 
> SID memory map is 0x01c14000 ~ 0x01c143FF, include 2048bits efuse space.
> H3 efuse space is SID_SRAM, its range is  0x01c14200 ~ +0x100.

Interesting, what is below the 0x200 registers?

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com

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