linux-kernel - Re: [PATCH v3 1/2] arm64: dts: Add dts files for Marvell Berlin4CT SoC

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Date:	Wed, 22 Jul 2015 10:19:19 +0100
From:	Sudeep Holla <sudeep.holla@....com>
To:	Jisheng Zhang <jszhang@...vell.com>,
	Catalin Marinas <Catalin.Marinas@....com>,
	Will Deacon <Will.Deacon@....com>,
	"khilman@...aro.org" <khilman@...aro.org>,
	"arnd@...db.de" <arnd@...db.de>, "olof@...om.net" <olof@...om.net>,
	Mark Rutland <Mark.Rutland@....com>,
	"robh+dt@...nel.org" <robh+dt@...nel.org>,
	"galak@...eaurora.org" <galak@...eaurora.org>,
	Pawel Moll <Pawel.Moll@....com>
CC:	Sudeep Holla <sudeep.holla@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH v3 1/2] arm64: dts: Add dts files for Marvell Berlin4CT
 SoC



On 22/07/15 09:57, Jisheng Zhang wrote:
> Add initial dtsi file to support Marvell Berlin4CT SoC with
> quad Cortex-A53 CPUs.
>
> It also adds dts file for Marvell Berlin4CT DMP board which is
> based on Berlin4CT SoC.
>
> Signed-off-by: Jisheng Zhang <jszhang@...vell.com>
> ---
>   arch/arm64/boot/dts/Makefile                  |   1 +
>   arch/arm64/boot/dts/marvell/Makefile          |   5 +
>   arch/arm64/boot/dts/marvell/berlin4ct-dmp.dts |  67 +++++++++++
>   arch/arm64/boot/dts/marvell/berlin4ct.dtsi    | 164 ++++++++++++++++++++++++++
>   4 files changed, 237 insertions(+)
>   create mode 100644 arch/arm64/boot/dts/marvell/Makefile
>   create mode 100644 arch/arm64/boot/dts/marvell/berlin4ct-dmp.dts
>   create mode 100644 arch/arm64/boot/dts/marvell/berlin4ct.dtsi
>

[..]

> diff --git a/arch/arm64/boot/dts/marvell/berlin4ct-dmp.dts b/arch/arm64/boot/dts/marvell/berlin4ct-dmp.dts
> new file mode 100644
> index 0000000..58ed7f1
> --- /dev/null
> +++ b/arch/arm64/boot/dts/marvell/berlin4ct-dmp.dts
> @@ -0,0 +1,67 @@

[..]

> +/dts-v1/;
> +
> +#include "berlin4ct.dtsi"
> +
> +/ {
> +	model = "MARVELL BG4CT DMP BOARD";
> +	compatible = "marvell,berlin4ct-dmp", "marvell,berlin4ct", "marvell,berlin";
> +
> +	chosen {
> +		bootargs = "earlycon=uart8250,mmio32,0xf7fcd000";
> +		stdout-path = "serial0:115200n8";

Just earlycon without any parameters will suffice. Currently earlycon
parsing code has issues and it's being worked out[1]. The serial port
details specified in stdout-path will be used by earlycon.

Regards,
Sudeep

[1] https://lkml.org/lkml/2015/4/8/604
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