linux-kernel - Re: [PATCH V4] arm64: dts: imx8mp: add NoC node

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Message-ID: <CAHCN7xJts7ki+wHGxwMw8eEa4hXkyOwZComzEf_JXiZUBhpkaw@mail.gmail.com>
Date: Wed, 23 Jul 2025 12:21:07 -0500
From: Adam Ford <aford173@...il.com>
To: "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc: djakov@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de, 
	festevam@...il.com, robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org, 
	abel.vesa@....com, abailon@...libre.com, l.stach@...gutronix.de, 
	laurent.pinchart@...asonboard.com, marex@...x.de, paul.elder@...asonboard.com, 
	Markus.Niebel@...tq-group.com, kernel@...gutronix.de, 
	linux-pm@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	linux-imx@....com, abelvesa@...nel.org, Peng Fan <peng.fan@....com>
Subject: Re: [PATCH V4] arm64: dts: imx8mp: add NoC node

On Wed, Jul 6, 2022 at 6:46 PM Peng Fan (OSS) <peng.fan@....nxp.com> wrote:
>
> From: Peng Fan <peng.fan@....com>
>
> Add i.MX8MP NoC node to make the interconnect i.MX8MP driver could work.
> Currently dynamic frequency scaling of the i.MX8MP NoC has not been
> supported, only NoC initial settings are configured by interconnect
> driver.

Peng,

I noticed the Mini and Nano are both supported by the same NoC driver,
but only the 8MP has a DT node.  Looking through the TRM on the Mini,
I don't see the operating points listed.  Would they be the same 200M
and 1000M on the Mini and Nano?

adam
>
> Signed-off-by: Peng Fan <peng.fan@....com>
> ---
>
> V4:
>  Georgi has merged the V3 driver and bindings patches. So only resend
>  this patch. Per Georgi's comments:
>   - Drop syscon from compatbile
>   - Drop the header inclusion
>
>  Seems I not see this patch in patchwork or mailist, maybe sent failed.
>  So gave a resend of V4.
>
>  V3:
>   https://lore.kernel.org/linux-arm-kernel/20220703091132.1412063-1-peng.fan@oss.nxp.com/
>
>  I not list the full change log, since this is only a minor patch
>
>  arch/arm64/boot/dts/freescale/imx8mp.dtsi | 21 +++++++++++++++++++++
>  1 file changed, 21 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8mp.dtsi b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> index eb2d516278eb..42ed8ee08548 100644
> --- a/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8mp.dtsi
> @@ -1019,6 +1019,27 @@ eqos: ethernet@...f0000 {
>                         };
>                 };
>
> +               noc: interconnect@...00000 {
> +                       compatible = "fsl,imx8mp-noc", "fsl,imx8m-noc";
> +                       reg = <0x32700000 0x100000>;
> +                       clocks = <&clk IMX8MP_CLK_NOC>;
> +                       #interconnect-cells = <1>;
> +
> +                       operating-points-v2 = <&noc_opp_table>;
> +
> +                       noc_opp_table: opp-table {
> +                               compatible = "operating-points-v2";
> +
> +                               opp-200M {
> +                                       opp-hz = /bits/ 64 <200000000>;
> +                               };
> +
> +                               opp-1000M {
> +                                       opp-hz = /bits/ 64 <1000000000>;
> +                               };
> +                       };
> +               };
> +
>                 aips4: bus@...00000 {
>                         compatible = "fsl,aips-bus", "simple-bus";
>                         reg = <0x32c00000 0x400000>;
> --
> 2.25.1
>