linux-kernel - Re: [PATCH] dt-bindings: mt76: support pointing to EEPROM using NVMEM cell

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Message-ID: <64591d27.df0a0220.d1f7b.ca4a@mx.google.com>
Date:   Mon, 8 May 2023 18:02:44 +0200
From:   Christian Marangi <ansuelsmth@...il.com>
To:     Rafał Miłecki <zajec5@...il.com>
Cc:     Felix Fietkau <nbd@....name>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Ryder Lee <ryder.lee@...iatek.com>,
        Shayne Chen <shayne.chen@...iatek.com>,
        Sean Wang <sean.wang@...iatek.com>,
        Kalle Valo <kvalo@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Rafał Miłecki <rafal@...ecki.pl>
Subject: Re: [PATCH] dt-bindings: mt76: support pointing to EEPROM using
 NVMEM cell

On Mon, May 08, 2023 at 05:58:20PM +0200, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@...ecki.pl>
> 
> All kind of calibration data should be described as NVMEM cells of NVMEM
> devices. That is more generic solution than "mediatek,mtd-eeprom" which
> is MTD specific.
> 
> Add support for EEPROM NVMEM cells and deprecate existing MTD-based
> property.
> 
> Cc: Christian Marangi <ansuelsmth@...il.com>
> Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
> ---
> Ansuel is working on mt76 driver support for NVMEM based EEPROM access:
> https://github.com/openwrt/mt76/pull/765
> 
> I took the liberty to propose this binding patch.
> 
> One important difference: my binding uses "eeprom" while Ansuel went
> with "precal". I found a lot of "eeprom" references and only one
> "precal". If you think however "precal" fits better please comment.

The name is totally "to decide". I feel eeprom might be also way too
much generic...
I was thinking to something like cal or precal following ath10k or
ath11k pattern.

Also in the code itself I notice there can be different calibration
hence the idea of precal and cal... (currently we define the entire mtd
partition and call it eeprom but on some card different data are
referenced with an offset... that will be dropped since nvmem cell will
reference directly the data without using offset, which seems an hack to
me)

-- 
	Ansuel