linux-kernel - Re: [PATCH 0/4] dt-bindings: imx: add nvmem property

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Date:   Thu, 24 Mar 2022 12:16:58 +0100
From:   Ahmad Fatoum <a.fatoum@...gutronix.de>
To:     Uwe Kleine-König <u.kleine-koenig@...gutronix.de>,
        "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org,
        ulf.hansson@...aro.org, Peng Fan <peng.fan@....com>,
        netdev@...r.kernel.org, s.hauer@...gutronix.de,
        linux-mmc@...r.kernel.org, qiangqing.zhang@....com,
        linux-kernel@...r.kernel.org, linux-can@...r.kernel.org,
        robh+dt@...nel.org, mkl@...gutronix.de, linux-imx@....com,
        kernel@...gutronix.de, kuba@...nel.org, krzk+dt@...nel.org,
        pabeni@...hat.com, shawnguo@...nel.org, davem@...emloft.net,
        wg@...ndegger.com, festevam@...il.com,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Subject: Re: [PATCH 0/4] dt-bindings: imx: add nvmem property

Hi,

On 24.03.22 12:11, Uwe Kleine-König wrote:
> I'd rather not have that in an official binding as the syntax is
> orthogonal to status = "..." but the semantic isn't. Also if we want
> something like that, I'd rather not want to adapt all bindings, but
> would like to see this being generic enough to be described in a single
> catch-all binding.

Cc += Srini who maintains the NVMEM bindings.

> I also wonder if it would be nicer to abstract that as something like:
> 
> 	/ {
> 		fuse-info {
> 			compatible = "otp-fuse-info";
> 
> 			flexcan {
> 				devices = <&flexcan1>, <&flexcan2>;
> 				nvmem-cells = <&flexcan_disabled>;
> 				nvmem-cell-names = "disabled";
> 			};
> 
> 			m7 {
> 				....
> 			};
> 		};
> 	};
> 
> as then the driver evaluating this wouldn't need to iterate over the
> whole dtb but just over this node. But I'd still keep this private to
> the bootloader and not describe it in the generic binding.

I like this, but being for bootloader consumption only doesn't mean that
this shouldn't be documented upstream. It's fine to have the binding,
even if Linux isn't expected to implement it.

Cheers,
Ahmad

> 
> Just my 0.02€
> Uwe


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