linux-kernel - Re: [PATCH 1/5] arm64: dts: ti: k3-j7200: Add general purpose timers

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Message-ID: <20230531215145.a6xiurql6jtvbr3y@filling>
Date:   Wed, 31 May 2023 16:51:45 -0500
From:   Nishanth Menon <nm@...com>
To:     Udit Kumar <u-kumar1@...com>
CC:     <vigneshr@...com>, <kristo@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <m-chawdhry@...com>, <n-francis@...com>
Subject: Re: [PATCH 1/5] arm64: dts: ti: k3-j7200: Add general purpose timers

On 16:02-20230426, Udit Kumar wrote:
[..]

> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
> index ef352e32f19d..555bde0e7fda 100644
> --- a/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-main.dtsi
[...]

> +	main_timer13: timer@...0000 {
> +		compatible = "ti,am654-timer";
> +		reg = <0x00 0x24d0000 0x00 0x400>;
> +		interrupts = <GIC_SPI 237 IRQ_TYPE_LEVEL_HIGH>;
> +		clocks = <&k3_clks 63 1>;
> +		clock-names = "fck";
> +		assigned-clocks = <&k3_clks 63 1>;
> +		assigned-clock-parents = <&k3_clks 63 2>;
> +		power-domains = <&k3_pds 63 TI_SCI_PD_EXCLUSIVE>;

^^ I think you need to use device ID 64 here instead of 63 for the node

Also for odd numbered timers, we need to set the TIMERx_CLKSEL_VD
explicitly for J7200, unfortunately the IDs are different from J721e,
preventing re-use :(

Example:
https://software-dl.ti.com/tisci/esd/latest/5_soc_doc/j7200/clocks.html#clocks-for-timer1-device
https://software-dl.ti.com/tisci/esd/latest/5_soc_doc/j7200/clocks.html#clocks-for-timer1-clksel-vd-device

> +		ti,timer-pwm;
> +	};
[...]

> diff --git a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> index 331b4e482e41..1c09e442b379 100644
> --- a/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j7200-mcu-wakeup.dtsi
> @@ -34,6 +34,126 @@ k3_reset: reset-controller {
>  		};
>  	};
[...]

> +	mcu_timer6: timer@...60000 {
> +		compatible = "ti,am654-timer";
> +		reg = <0x00 0x40460000 0x00 0x400>;
> +		interrupts = <GIC_SPI 822 IRQ_TYPE_LEVEL_HIGH>;
> +		clocks = <&k3_clks 76 1>;
> +		clock-names = "fck";
> +		assigned-clocks = <&k3_clks 76 1>;
> +		assigned-clock-parents = <&k3_clks 76 2>;
> +		power-domains = <&k3_pds 35 TI_SCI_PD_EXCLUSIVE>;
I think this needs to be 76 instead of 35

> +		ti,timer-pwm;
> +	};
> +

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