From: Conor Dooley <conor@kernel.org>
To: Dinh Nguyen <dinguyen@kernel.org>
Cc: miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com,
linux-mtd@lists.infradead.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org,
Khairul Anuar Romli <khairul.anuar.romli@altera.com>,
Rob Herring <robh@kernel.org>
Subject: Re: [PATCH] dt-bindings: mtd: cdns,hp-nfc: Add dma-coherent property
Date: Sat, 31 Jan 2026 20:26:50 +0000 [thread overview]
Message-ID: <20260131-pasty-dicing-4ed7799aa546@spud> (raw)
In-Reply-To: <20260131172611.28807-1-dinguyen@kernel.org>
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On Sat, Jan 31, 2026 at 11:26:11AM -0600, Dinh Nguyen wrote:
> From: Khairul Anuar Romli <khairul.anuar.romli@altera.com>
>
> The Cadence HP NAND Flash Controller on supports DMA transactions through
> a coherent interconnect. In previous generations SoC (Stratix10 and Agilex)
> the interconnect was non-coherent, hence there is no need for dma-coherent
> property to be presence. In Agilex 5, the architecture has changed. It
> introduced a coherent interconnect that supports cache-coherent DMA.
>
> Signed-off-by: Khairul Anuar Romli <khairul.anuar.romli@altera.com>
> Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Why does this v1 have an ack?
> Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
> ---
> Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml b/Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml
> index 73dc69cee4d8..367257a227b1 100644
> --- a/Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml
> +++ b/Documentation/devicetree/bindings/mtd/cdns,hp-nfc.yaml
> @@ -40,6 +40,8 @@ properties:
> dmas:
> maxItems: 1
>
> + dma-coherent: true
> +
> iommus:
> maxItems: 1
>
> --
> 2.42.0.411.g813d9a9188
>
>
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next prev parent reply other threads:[~2026-01-31 20:27 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-31 17:26 [PATCH] dt-bindings: mtd: cdns,hp-nfc: Add dma-coherent property Dinh Nguyen
2026-01-31 20:26 ` Conor Dooley [this message]
2026-02-01 19:25 ` Dinh Nguyen
2026-02-03 16:15 ` Miquel Raynal
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