linux-kernel - Re: [PATCH 1/3] arm64: dts: ti: Add R5F and C7x remote processor nodes

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Date: Fri, 7 Jun 2024 08:50:35 -0500
From: Andrew Davis <afd@...com>
To: Beleswar Padhi <b-padhi@...com>, <nm@...com>, <vigneshr@...com>
CC: <kristo@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>, <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <vaishnav.a@...com>, <j-choudhary@...com>, <u-kumar1@...com>
Subject: Re: [PATCH 1/3] arm64: dts: ti: Add R5F and C7x remote processor
 nodes

On 6/7/24 4:04 AM, Beleswar Padhi wrote:
> From: Apurva Nandan <a-nandan@...com>
> 
> The K3 J722S SoCs have one single-core Arm Cortex-R5F processor in each
> of the WAKEUP, MCU and MAIN voltage domain, and two C71x DSP subsystems
> in MAIN voltage domain. Add the DT nodes to support Inter-Processor
> Communication.
> 
> Signed-off-by: Apurva Nandan <a-nandan@...com>
> Signed-off-by: Beleswar Padhi <b-padhi@...com>
> ---
>   arch/arm64/boot/dts/ti/k3-j722s.dtsi | 63 ++++++++++++++++++++++++++++
>   1 file changed, 63 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-j722s.dtsi b/arch/arm64/boot/dts/ti/k3-j722s.dtsi
> index c75744edb1433..a894a132f1667 100644
> --- a/arch/arm64/boot/dts/ti/k3-j722s.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j722s.dtsi
> @@ -87,3 +87,66 @@ &oc_sram {
>   	reg = <0x00 0x70000000 0x00 0x40000>;
>   	ranges = <0x00 0x00 0x70000000 0x40000>;
>   };
> +
> +&cbass_main {

There is another series[0] in progress that adds `k3-j722s-main.dtsi` for the J722s
MAIN domain items, these new nodes will belong there.

That does mean there is a dependency on that series, but better than having to move
these nodes over later (and I'm sure Nishanth and Vignesh can sort that out when
taking both these series..)

Andrew

[0]https://lore.kernel.org/linux-arm-kernel/20240604085252.3686037-4-s-vadapalli@ti.com/

> +	main_r5fss0: r5fss@...00000 {
> +		compatible = "ti,am62-r5fss";
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +		ranges = <0x78400000 0x00 0x78400000 0x8000>,
> +			 <0x78500000 0x00 0x78500000 0x8000>;
> +		power-domains = <&k3_pds 261 TI_SCI_PD_EXCLUSIVE>;
> +		status = "disabled";
> +
> +		main_r5fss0_core0: r5f@...00000 {
> +			compatible = "ti,am62-r5f";
> +			reg = <0x78400000 0x00008000>,
> +			      <0x78500000 0x00008000>;
> +			reg-names = "atcm", "btcm";
> +			ti,sci = <&dmsc>;
> +			ti,sci-dev-id = <262>;
> +			ti,sci-proc-ids = <0x04 0xff>;
> +			resets = <&k3_reset 262 1>;
> +			firmware-name = "j722s-main-r5f0_0-fw";
> +			ti,atcm-enable = <1>;
> +			ti,btcm-enable = <1>;
> +			ti,loczrama = <1>;
> +		};
> +	};
> +
> +	c7x_0: dsp@...00000 {
> +		compatible = "ti,am62a-c7xv-dsp";
> +		reg = <0x00 0x7e000000 0x00 0x00200000>;
> +		reg-names = "l2sram";
> +		ti,sci = <&dmsc>;
> +		ti,sci-dev-id = <208>;
> +		ti,sci-proc-ids = <0x30 0xff>;
> +		resets = <&k3_reset 208 1>;
> +		firmware-name = "j722s-c71_0-fw";
> +		status = "disabled";
> +	};
> +
> +	c7x_1: dsp@...00000 {
> +		compatible = "ti,am62a-c7xv-dsp";
> +		reg = <0x00 0x7e200000 0x00 0x00200000>;
> +		reg-names = "l2sram";
> +		ti,sci = <&dmsc>;
> +		ti,sci-dev-id = <268>;
> +		ti,sci-proc-ids = <0x31 0xff>;
> +		resets = <&k3_reset 268 1>;
> +		firmware-name = "j722s-c71_1-fw";
> +		status = "disabled";
> +	};
> +};
> +
> +/* MCU domain overrides */
> +
> +&mcu_r5fss0_core0 {
> +	firmware-name = "j722s-mcu-r5f0_0-fw";
> +};
> +
> +/* Wakeup domain overrides */
> +
> +&wkup_r5fss0_core0 {
> +	firmware-name = "j722s-wkup-r5f0_0-fw";
> +};