From: Rob Herring <robh@kernel.org>
To: Gregory CLEMENT <gregory.clement@bootlin.com>
Cc: "Linus Walleij" <linus.walleij@linaro.org>,
"Miquel Raynal" <miquel.raynal@bootlin.com>,
"Richard Weinberger" <richard@nod.at>,
"Vignesh Raghavendra" <vigneshr@ti.com>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Vladimir Kondratiev" <vladimir.kondratiev@mobileye.com>,
"Benoît Monin" <benoit.monin@bootlin.com>,
"Théo Lebrun" <theo.lebrun@bootlin.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mtd@lists.infradead.org
Subject: Re: [PATCH v3 2/4] of: reserved_mem: Support multiple 'reg' entries for memory-region
Date: Wed, 14 Jan 2026 16:31:40 -0600 [thread overview]
Message-ID: <20260114223140.GA3306270-robh@kernel.org> (raw)
In-Reply-To: <20260107-mtd-memregion-v3-2-f9fc9107b992@bootlin.com>
On Wed, Jan 07, 2026 at 02:04:53PM +0100, Gregory CLEMENT wrote:
> The Device Tree specification allows a "memory-region" node to have
> multiple 'reg' entries, but the current kernel implementation only
> processes the first entry. This can lead to drivers not being able to
> access all the reserved memory regions specified in the Device Tree.
This may be a case of we change the spec. Or at least say, nodes
referenced by memory-region can only have 1 region. Are there some
existing users needing this functionality?
Rob
WARNING: multiple messages have this Message-ID (diff)
From: Rob Herring <robh@kernel.org>
To: Gregory CLEMENT <gregory.clement@bootlin.com>
Cc: "Linus Walleij" <linus.walleij@linaro.org>,
"Miquel Raynal" <miquel.raynal@bootlin.com>,
"Richard Weinberger" <richard@nod.at>,
"Vignesh Raghavendra" <vigneshr@ti.com>,
"Krzysztof Kozlowski" <krzk+dt@kernel.org>,
"Conor Dooley" <conor+dt@kernel.org>,
"Thomas Petazzoni" <thomas.petazzoni@bootlin.com>,
"Vladimir Kondratiev" <vladimir.kondratiev@mobileye.com>,
"Benoît Monin" <benoit.monin@bootlin.com>,
"Théo Lebrun" <theo.lebrun@bootlin.com>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-mtd@lists.infradead.org
Subject: Re: [PATCH v3 2/4] of: reserved_mem: Support multiple 'reg' entries for memory-region
Date: Wed, 14 Jan 2026 16:31:40 -0600 [thread overview]
Message-ID: <20260114223140.GA3306270-robh@kernel.org> (raw)
In-Reply-To: <20260107-mtd-memregion-v3-2-f9fc9107b992@bootlin.com>
On Wed, Jan 07, 2026 at 02:04:53PM +0100, Gregory CLEMENT wrote:
> The Device Tree specification allows a "memory-region" node to have
> multiple 'reg' entries, but the current kernel implementation only
> processes the first entry. This can lead to drivers not being able to
> access all the reserved memory regions specified in the Device Tree.
This may be a case of we change the spec. Or at least say, nodes
referenced by memory-region can only have 1 region. Are there some
existing users needing this functionality?
Rob
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Linux MTD discussion mailing list
http://lists.infradead.org/mailman/listinfo/linux-mtd/
next prev parent reply other threads:[~2026-01-14 22:31 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-07 13:04 [PATCH v3 0/4] MTD physmap: Adding reserved RAM support and fixing reserved_mem limitations Gregory CLEMENT
2026-01-07 13:04 ` Gregory CLEMENT
2026-01-07 13:04 ` [PATCH v3 1/4] of: reserved_mem: Fix placement of __free() annotation Gregory CLEMENT
2026-01-07 13:04 ` Gregory CLEMENT
2026-01-21 2:30 ` Rob Herring (Arm)
2026-01-21 2:30 ` Rob Herring (Arm)
2026-01-07 13:04 ` [PATCH v3 2/4] of: reserved_mem: Support multiple 'reg' entries for memory-region Gregory CLEMENT
2026-01-07 13:04 ` Gregory CLEMENT
2026-01-08 20:17 ` kernel test robot
2026-01-08 20:17 ` kernel test robot
2026-01-09 16:12 ` Gregory CLEMENT
2026-01-09 16:12 ` Gregory CLEMENT
2026-01-08 23:06 ` kernel test robot
2026-01-08 23:06 ` kernel test robot
2026-01-13 2:59 ` kernel test robot
2026-01-13 2:59 ` kernel test robot
2026-01-13 3:41 ` kernel test robot
2026-01-13 3:41 ` kernel test robot
2026-01-14 22:31 ` Rob Herring [this message]
2026-01-14 22:31 ` Rob Herring
2026-01-07 13:04 ` [PATCH v3 3/4] dt-bindings: mtd: physmap: Allow using memory-region to access memory resources Gregory CLEMENT
2026-01-07 13:04 ` Gregory CLEMENT
2026-01-09 9:52 ` Linus Walleij
2026-01-09 9:52 ` Linus Walleij
2026-01-07 13:04 ` [PATCH v3 4/4] mtd: physmap: Add support for RAM reserved memory regions Gregory CLEMENT
2026-01-07 13:04 ` Gregory CLEMENT
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