linux-kernel - Re: [PATCH v5 6/6] dt-bindings: mmc: Document support for partition table in mmc-card

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Message-ID: <172790324832.1315949.14972458101989474417.robh@kernel.org>
Date: Wed, 2 Oct 2024 16:07:28 -0500
From: "Rob Herring (Arm)" <robh@...nel.org>
To: Christian Marangi <ansuelsmth@...il.com>
Cc: upstream@...oha.com, Mikko Rapeli <mikko.rapeli@...aro.org>,
	linux-kernel@...r.kernel.org,
	INAGAKI Hiroshi <musashino.open@...il.com>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	Dominique Martinet <dominique.martinet@...ark-techno.com>,
	Riyan Dhiman <riyandhiman14@...il.com>,
	Li Lingfeng <lilingfeng3@...wei.com>,
	Conor Dooley <conor+dt@...nel.org>, Jan Kara <jack@...e.cz>,
	Linus Walleij <linus.walleij@...aro.org>,
	Jorge Ramirez-Ortiz <jorge@...ndries.io>,
	linux-block@...r.kernel.org,
	Jens Wiklander <jens.wiklander@...aro.org>,
	Li Zhijian <lizhijian@...itsu.com>,
	Christophe JAILLET <christophe.jaillet@...adoo.fr>,
	Jens Axboe <axboe@...nel.dk>, linux-doc@...r.kernel.org,
	Lorenzo Bianconi <lorenzo@...nel.org>,
	Miquel Raynal <miquel.raynal@...tlin.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Ming Lei <ming.lei@...hat.com>, Al Viro <viro@...iv.linux.org.uk>,
	Christian Heusel <christian@...sel.eu>,
	Jonathan Corbet <corbet@....net>, linux-mmc@...r.kernel.org,
	Adrian Hunter <adrian.hunter@...el.com>,
	Avri Altman <avri.altman@....com>, devicetree@...r.kernel.org,
	Daniel Golle <daniel@...rotopia.org>,
	Christian Brauner <brauner@...nel.org>
Subject: Re: [PATCH v5 6/6] dt-bindings: mmc: Document support for partition
 table in mmc-card


On Wed, 02 Oct 2024 00:18:58 +0200, Christian Marangi wrote:
> Document support for defining a partition table in the mmc-card node.
> 
> This is needed if the eMMC doesn't have a partition table written and
> the bootloader of the device load data by using absolute offset of the
> block device. This is common on embedded device that have eMMC installed
> to save space and have non removable block devices.
> 
> If an OF partition table is detected, any partition table written in the
> eMMC will be ignored and won't be parsed.
> 
> eMMC provide a generic disk for user data and if supported (JEDEC 4.4+)
> also provide two additional disk ("boot1" and "boot2") for special usage
> of boot operation where normally is stored the bootloader or boot info.
> New JEDEC version also supports up to 4 GP partition for other usage
> called "gp1", "gp2", "gp3", "gp4".
> 
> Signed-off-by: Christian Marangi <ansuelsmth@...il.com>
> ---
>  .../devicetree/bindings/mmc/mmc-card.yaml     | 52 +++++++++++++++++++
>  1 file changed, 52 insertions(+)
> 

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