linux-kernel - Re: VAIO EEPROM support in at24

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Message-ID: <20200807113146.7557c18b@endymion>
Date:   Fri, 7 Aug 2020 11:31:46 +0200
From:   Jean Delvare <jdelvare@...e.de>
To:     Bartosz Golaszewski <brgl@...ev.pl>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Linux I2C <linux-i2c@...r.kernel.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Arnd Bergmann <arnd@...db.de>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: VAIO EEPROM support in at24

On Wed, 5 Aug 2020 16:36:55 +0200, Jean Delvare wrote:
> 1* Do we actually need to use a struct resource? With the current
>    requirements, that looks overkill to me. We really only need the
>    start and end offsets of the masked area (or start and length). Or
>    do you plan to ever support multiple masked ranges, and
>    resource.child would be used to daisy-chain these ranges? Personally
>    I would wait until the need exists.

Dang, turns out that the need already exists. I just found that the
eeprom driver masks *2* areas of the Sony VAIO EEPROMs. I should know
because I'm the one who made that change but that was 13 years ago and
my memory doesn't go that far back.

I'll think of a way to support that. Still not a big fan of
daisy-chained resource structs though. Maybe a generic post-processing
callback function would do... I'll give that a try.

-- 
Jean Delvare
SUSE L3 Support