linux-kernel - Re: [linux-sunxi] Re: [PATCH v3 27/30] ARM: dts: sun8i: h3: use calibration for ths

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Message-ID: <BEA89263-1186-432A-B274-228FAC21A798@aosc.io>
Date:   Thu, 06 Sep 2018 20:04:11 +0800
From:   Icenowy Zheng <icenowy@...c.io>
To:     maxime.ripard@...tlin.com,
        Maxime Ripard <maxime.ripard@...tlin.com>,
        Philipp Rossak <embed3d@...il.com>
CC:     Emmanuel Vadot <manu@...ouilliste.com>, lee.jones@...aro.org,
        robh+dt@...nel.org, mark.rutland@....com, wens@...e.org,
        linux@...linux.org.uk, jic23@...nel.org, knaack.h@....de,
        lars@...afoo.de, pmeerw@...erw.net, eugen.hristev@...rochip.com,
        rdunlap@...radead.org, vilhelm.gray@...il.com,
        clabbe.montjoie@...il.com, quentin.schulz@...tlin.com,
        geert+renesas@...der.be, lukas@...ner.de, arnd@...db.de,
        broonie@...nel.org, arnaud.pouliquen@...com,
        linux-iio@...r.kernel.org, devicetree@...r.kernel.org,
        linux-sunxi@...glegroups.com, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [linux-sunxi] Re: [PATCH v3 27/30] ARM: dts: sun8i: h3: use calibration for ths



于 2018年9月6日 GMT+08:00 下午7:51:15, Maxime Ripard <maxime.ripard@...tlin.com> 写到:
>On Thu, Sep 06, 2018 at 01:47:47PM +0200, Philipp Rossak wrote:
>> On 04.09.2018 18:46, Emmanuel Vadot wrote:
>> > > +			/* Data cells */
>> > > +			thermal_calibration: calib@234 {
>> > > +				reg = <0x234 0x8>;
>> > > +			};
>> >   You are declaring 8 bytes of calibration data but to my knowledge
>it's
>> > only 2 bytes per sensor, so 2 bytes for H3.
>> >   Am I missing something ?
>> > 
>> >   Thanks,
>> 
>> Emmanuel you are right, it is 2 bytes per Sensor and should be 2
>bytes for
>> H3, but the thermal calibration data field is on all chips 64 bit
>wide - so
>> 8 bytes. So I'm reading here the complete calibration data field.
>
>Having one cell per channel would make more sense I guess.

I have mentioned that this is impossible because of wrong
addressing caused by LE2BE in SID driver.

>
>Maxime