From: Joy Zou <joy.zou@nxp.com>
To: Frank Li <Frank.li@nxp.com>
Cc: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Shawn Guo <shawnguo@kernel.org>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>, Peng Fan <peng.fan@nxp.com>,
Ye Li <ye.li@nxp.com>,
devicetree@vger.kernel.org, imx@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] arm64: dts: imx95: Reserve eDMA channels 0-1 for V2X
Date: Wed, 21 Jan 2026 18:31:22 +0800 [thread overview]
Message-ID: <20260121103122.GB2474386@shlinux88> (raw)
In-Reply-To: <aW+shmRG/K/T/UjX@lizhi-Precision-Tower-5810>
On Tue, Jan 20, 2026 at 11:25:42AM -0500, Frank Li wrote:
> On Tue, Jan 20, 2026 at 04:35:50PM +0800, Joy Zou wrote:
> > Reserve eDMA channels 0 and 1 on the AXI eDMA controller for exclusive
> > use by V2X (Vehicle-to-Everything) fast hash operations.
> >
> > Signed-off-by: Joy Zou <joy.zou@nxp.com>
> > ---
> > ---
> > arch/arm64/boot/dts/freescale/imx95.dtsi | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/arch/arm64/boot/dts/freescale/imx95.dtsi b/arch/arm64/boot/dts/freescale/imx95.dtsi
> > index 55e2da094c889fc7c1096d0e36f31ae118d2a982..24d02aa18b2f480bbffdc30bc41c658fb3aaf67a 100644
> > --- a/arch/arm64/boot/dts/freescale/imx95.dtsi
> > +++ b/arch/arm64/boot/dts/freescale/imx95.dtsi
> > @@ -631,6 +631,7 @@ edma2: dma-controller@42000000 {
> > reg = <0x42000000 0x210000>;
> > #dma-cells = <3>;
> > dma-channels = <64>;
> > + dma-channel-mask = <0x3>;
>
> Can you add comments here? v2x needn't dt node?
Yes! V2X operates on a dedicated M-core and needn't DT node.
Just reserve the communication channel for V2X.
BR
Joy Zou
>
> Frank
>
> > interrupts = <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>,
> > <GIC_SPI 128 IRQ_TYPE_LEVEL_HIGH>,
> > <GIC_SPI 129 IRQ_TYPE_LEVEL_HIGH>,
> >
> > ---
> > base-commit: d08c85ac8894995d4b0d8fb48d2f6a3e53cd79ab
> > change-id: 20260120-b4-imx95-v2x-3e01c7bc6881
> >
> > Best regards,
> > --
> > Joy Zou <joy.zou@nxp.com>
> >
prev parent reply other threads:[~2026-01-21 10:31 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-01-20 8:35 [PATCH] arm64: dts: imx95: Reserve eDMA channels 0-1 for V2X Joy Zou
2026-01-20 12:30 ` Laurentiu Mihalcea
2026-01-21 6:27 ` Joy Zou
2026-01-20 16:25 ` Frank Li
2026-01-21 10:31 ` Joy Zou [this message]
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