linux-kernel - Re: [PATCH V4] nvmem: add explicit config option to read old syntax fixed OF cells

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Message-ID: <b5124f4a-6a7a-3fd9-32d6-e0690a45c7e8@gmail.com>
Date:   Tue, 18 Jul 2023 09:20:05 +0200
From:   Rafał Miłecki <zajec5@...il.com>
To:     Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:     Miquel Raynal <miquel.raynal@...tlin.com>,
        Richard Weinberger <richard@....at>,
        Vignesh Raghavendra <vigneshr@...com>,
        Hector Martin <marcan@...can.st>,
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        Alyssa Rosenzweig <alyssa@...enzweig.io>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
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        Fabio Estevam <festevam@...il.com>,
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        Michael Walle <michael@...le.cc>,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: Re: [PATCH V4] nvmem: add explicit config option to read old syntax
 fixed OF cells

Hi,

On 4.04.2023 00:55, Rafał Miłecki wrote:
> Binding for fixed NVMEM cells defined directly as NVMEM device subnodes
> has been deprecated. It has been replaced by the "fixed-layout" NVMEM
> layout binding.
> 
> New syntax is meant to be clearer and should help avoiding imprecise
> bindings.
> 
> NVMEM subsystem already supports the new binding. It should be a good
> idea to limit support for old syntax to existing drivers that actually
> support & use it (we can't break backward compatibility!). That way we
> additionally encourage new bindings & drivers to ignore deprecated
> binding.
> 
> It wasn't clear (to me) if rtc and w1 code actually uses old syntax
> fixed cells. I enabled them to don't risk any breakage.

is there any chance I can have this accepted / pushed, please?

It's a tiny optimization and it makes sure people don't use deprecated
syntax with new drivers.

I also noticed this will probably let me drop an unclear and
non-intuitive no_of_node config option.