linux-kernel - Re: [PATCH v4 mvebu + mvebu/dt64 2/2] arm64: dts: marvell: armada-37xx: move firmware node to generic dtsi file

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Message-ID: <87mtro1vvx.fsf@BL-laptop>
Date:   Thu, 17 Jun 2021 15:08:34 +0200
From:   Gregory CLEMENT <gregory.clement@...tlin.com>
To:     Pali Rohár <pali@...nel.org>,
        Andrew Lunn <andrew@...n.ch>
Cc:     Marek Behún <kabel@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 mvebu + mvebu/dt64 2/2] arm64: dts: marvell:
 armada-37xx: move firmware node to generic dtsi file

Hello,

> Move the turris-mox-rwtm firmware node from Turris MOX' device tree into
> the generic armada-37xx.dtsi file and use the generic compatible string
> 'marvell,armada-3700-rwtm-firmware' instead of the current one.
>
> Turris MOX DTS file contains also old compatible string for backward
> compatibility.
>
> The Turris MOX rWTM firmware can be used on any Armada 37xx device,
> giving them access to the rWTM hardware random number generator, which
> is otherwise unavailable.
>
> This change allows Linux to load the turris-mox-rwtm.ko module on these
> boards.
>
> Tested on ESPRESSObin v5 with both default Marvell WTMI firmware and
> CZ.NIC's firmware. With default WTMI firmware the turris-mox-rwtm fails
> to probe, while with CZ.NIC's firmware it registers the HW random number
> generator.
>
> Signed-off-by: Pali Rohár <pali@...nel.org>
> Signed-off-by: Marek Behún <kabel@...nel.org>
> Cc: <stable@...r.kernel.org> # 5.4+: 46d2f6d0c99f ("arm64: dts: armada-3720-turris-mox: add firmware node")

Applied on mvebu/dt64 (I removed the Fixes line)

Thanks,

Gregory
> ---
>  arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts | 6 ++----
>  arch/arm64/boot/dts/marvell/armada-37xx.dtsi           | 8 ++++++++
>  2 files changed, 10 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
> index 0753cc489638..6700f2212b61 100644
> --- a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
> @@ -109,10 +109,8 @@
>  	};
>  
>  	firmware {
> -		turris-mox-rwtm {
> -			compatible = "cznic,turris-mox-rwtm";
> -			mboxes = <&rwtm 0>;
> -			status = "okay";
> +		armada-3700-rwtm {
> +			compatible = "marvell,armada-3700-rwtm-firmware", "cznic,turris-mox-rwtm";
>  		};
>  	};
>  };
> diff --git a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
> index 1b7f43e27589..847a2d12a4be 100644
> --- a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
> +++ b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
> @@ -505,4 +505,12 @@
>  			};
>  		};
>  	};
> +
> +	firmware {
> +		armada-3700-rwtm {
> +			compatible = "marvell,armada-3700-rwtm-firmware";
> +			mboxes = <&rwtm 0>;
> +			status = "okay";
> +		};
> +	};
>  };
> -- 
> 2.20.1
>

-- 
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com