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Message-ID: <166681327937.1046171.12755634067676619192.robh@kernel.org>
Date:   Wed, 26 Oct 2022 14:41:20 -0500
From:   Rob Herring <robh@...nel.org>
To:     Rafał Miłecki <zajec5@...il.com>
Cc:     Rob Herring <robh+dt@...nel.org>, linux-mtd@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Jens Axboe <axboe@...nel.dk>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Mikhail Zhilkin <csharper2005@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Rafał Miłecki <rafal@...ecki.pl>,
        Christian Marangi <ansuelsmth@...il.com>,
        devicetree@...r.kernel.org, Richard Weinberger <richard@....at>,
        "Martin K . Petersen" <martin.petersen@...cle.com>,
        Vignesh Raghavendra <vigneshr@...com>,
        Chaitanya Kulkarni <kch@...dia.com>,
        Miquel Raynal <miquel.raynal@...tlin.com>
Subject: Re: [PATCH V3 1/2] dt-bindings: mtd: partitions: support marking
 rootfs partition

On Sat, 22 Oct 2022 23:13:17 +0200, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@...ecki.pl>
> 
> Linux needs to know what to use as root device. On embedded devices with
> flash the only common way to specify that is cmdline & root= parameter.
> 
> That solution works with U-Boot which is Linux & cmdline aware but isn't
> available with all market bootloaders. Also that method is fragile:
> 1. Requires specific probing order on multi-flash devices
> 2. Uses hardcoded partitions indexes
> 
> A lot of devices use different partitioning methods. It may be
> "fixed-partitions" or some dynamic partitioning (e.g. based on parts
> table). For such cases allow "linux,rootfs" property to mark correct
> flash partition.
> 
> Signed-off-by: Rafał Miłecki <rafal@...ecki.pl>
> ---
> V2: Use "linux,rootfs" as more accurate. Thanks Rob.
> ---
>  .../devicetree/bindings/mtd/partitions/fixed-partitions.yaml  | 1 +
>  .../devicetree/bindings/mtd/partitions/partition.yaml         | 4 ++++
>  2 files changed, 5 insertions(+)
> 

Reviewed-by: Rob Herring <robh@...nel.org>

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