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

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Message-ID: <CAGb2v65qfaTdQqXHD=-FHz1M1sHCTro97QETZUH=vA2BbRS+7A@mail.gmail.com>
Date:	Tue, 24 Nov 2015 11:13:13 +0800
From:	Chen-Yu Tsai <wens@...e.org>
To:	Maxime Ripard <maxime.ripard@...e-electrons.com>
Cc:	Josef Gajdusek <atx@....name>,
	linux-sunxi <linux-sunxi@...glegroups.com>,
	linux-clk <linux-clk@...r.kernel.org>, linux-pm@...r.kernel.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	devicetree <devicetree@...r.kernel.org>, gpatchesrdh@...as.com,
	Mike Turquette <mturquette@...aro.org>,
	Hans De Goede <hdegoede@...hat.com>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Michael Turquette <mturquette@...libre.com>,
	Emilio Lopez <emilio@...pez.com.ar>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	Eduardo Valentin <edubezval@...il.com>,
	Zhang Rui <rui.zhang@...el.com>, Chen-Yu Tsai <wens@...e.org>,
	Kumar Gala <galak@...eaurora.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Mark Rutland <mark.rutland@....com>,
	Pawel Moll <pawel.moll@....com>,
	Rob Herring <robh+dt@...nel.org>
Subject: Re: [PATCH v2 1/5] ARM: dts: sun8i: Add SID node

Hi,

On Mon, Nov 23, 2015 at 8:43 PM, Maxime Ripard
<maxime.ripard@...e-electrons.com> 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 <atx@....name>
>> ---
>>  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?

My H3 datasheet (v1.1) says its 1 kB wide.

It'd be nice if Allwinner actually listed the "usable" E-fuse offsets
and widths, instead of having us dig through the SDK code.

Regards
ChenYu
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