linux-kernel - Re: [PATCH] arm64: dts: ti: k3-am62a7: Add MCU MCAN nodes

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Message-ID: <20230802051402.totwmtw2oadqrai7@herself>
Date:   Wed, 2 Aug 2023 00:14:02 -0500
From:   Nishanth Menon <nm@...com>
To:     Judith Mendez <jm@...com>
CC:     Vignesh Raghavendra <vigneshr@...com>,
        Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH]  arm64: dts: ti: k3-am62a7: Add MCU MCAN nodes

On 13:38-20230724, Judith Mendez wrote:
> On AM62ax there are no hardware interrupts routed to A53 GIC
> interrupt controller for MCU MCAN IPs, so MCU MCAN nodes were
> omitted from MCU dtsi.
> 
> Timer polling was introduced in commits [1][2] enabling 3x MCAN
> on AM62ax, so now add MCU MCAN nodes to the mcu dtsi for the Cortex A53.
> 
> [1] commit b382380c0d2d ("can: m_can: Add hrtimer to generate software interrupt")
> [2] commit bb410c03b999 ("dt-bindings: net: can: Remove interrupt properties for MCAN")
> 
> Signed-off-by: Judith Mendez <jm@...com>
> ---
>  arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi | 24 ++++++++++++++++++++++++
>  1 file changed, 24 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi b/arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi
> index 04599762c2b7..3fca702e7f2d 100644
> --- a/arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am62a-mcu.dtsi
> @@ -143,4 +143,28 @@ mcu_rti0: watchdog@...0000 {
>  		/* Tightly coupled to M4F */
>  		status = "reserved";
>  	};
> +
> +	mcu_mcan0: can@...0000 {

s/4e00000/4e08000

> +		compatible = "bosch,m_can";
> +		reg = <0x00 0x4e08000 0x00 0x200>,
> +		      <0x00 0x4e00000 0x00 0x8000>;
> +		reg-names = "m_can", "message_ram";
> +		power-domains = <&k3_pds 188 TI_SCI_PD_EXCLUSIVE>;
> +		clocks = <&k3_clks 188 6>, <&k3_clks 188 1>;
> +		clock-names = "hclk", "cclk";
> +		bosch,mram-cfg = <0x0 128 64 64 64 64 32 32>;
> +		status = "disabled";
> +	};
> +
> +	mcu_mcan1: can@...0000 {

s/4e10000/4e18000

> +		compatible = "bosch,m_can";
> +		reg = <0x00 0x4e18000 0x00 0x200>,
> +		      <0x00 0x4e10000 0x00 0x8000>;
> +		reg-names = "m_can", "message_ram";
> +		power-domains = <&k3_pds 189 TI_SCI_PD_EXCLUSIVE>;
> +		clocks = <&k3_clks 189 6>, <&k3_clks 189 1>;
> +		clock-names = "hclk", "cclk";
> +		bosch,mram-cfg = <0x0 128 64 64 64 64 32 32>;
> +		status = "disabled";
> +	};
>  };
> -- 
> 2.34.1
> 

-- 
Regards,
Nishanth Menon
Key (0xDDB5849D1736249D) / Fingerprint: F8A2 8693 54EB 8232 17A3  1A34 DDB5 849D 1736 249D