linux-kernel - Re: [PATCH v8 09/13] arm64: dts: Add board DTS for Rpi5 which includes RP1 node

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <526751d2-c7e8-4097-9454-c9049b880225@gmx.net>
Date: Mon, 14 Apr 2025 13:48:45 +0200
From: Stefan Wahren <wahrenst@....net>
To: Andrea della Porta <andrea.porta@...e.com>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Florian Fainelli <florian.fainelli@...adcom.com>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>,
 Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Krzysztof Wilczynski <kw@...ux.com>,
 Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
 Bjorn Helgaas <bhelgaas@...gle.com>, Linus Walleij
 <linus.walleij@...aro.org>, Catalin Marinas <catalin.marinas@....com>,
 Will Deacon <will@...nel.org>, Bartosz Golaszewski <brgl@...ev.pl>,
 Derek Kiernan <derek.kiernan@....com>, Dragan Cvetic
 <dragan.cvetic@....com>, Arnd Bergmann <arnd@...db.de>,
 Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
 Saravana Kannan <saravanak@...gle.com>, linux-clk@...r.kernel.org,
 devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org,
 linux-gpio@...r.kernel.org, Masahiro Yamada <masahiroy@...nel.org>,
 Herve Codina <herve.codina@...tlin.com>,
 Luca Ceresoli <luca.ceresoli@...tlin.com>,
 Thomas Petazzoni <thomas.petazzoni@...tlin.com>, Andrew Lunn
 <andrew@...n.ch>, Phil Elwell <phil@...pberrypi.com>,
 Dave Stevenson <dave.stevenson@...pberrypi.com>, kernel-list@...pberrypi.com
Subject: Re: [PATCH v8 09/13] arm64: dts: Add board DTS for Rpi5 which
 includes RP1 node

Hi Andrea,

Am 19.03.25 um 22:52 schrieb Andrea della Porta:
> Add the board 'monolithic' DTS for RaspberryPi 5 which includes
> the RP1 node definition.  The inclusion treeis as follow (the
> arrow points to the includer):
>
> rp1-common.dtsi ----> rp1-nexus.dtsi ----> bcm2712-rpi-5-b-monolithic.dts
>                                                 ^
>                                                 |
>                                             bcm2712-rpi-5-b.dts
sorry for the delay. I'm not happy with the monolithic appendix.

How about bcm2712-rpi-5-b-rp1.dts or something more self-explaining?Regards
> This is designed to maximize the compatibility with downstream DT
> while ensuring that a fully defined DT (one which includes the RP1
> node as opposed to load it from overlay at runtime) is present
> since early boot stage.
>
> Signed-off-by: Andrea della Porta <andrea.porta@...e.com>
> ---
> Right now bcm2712-rpi-5-b.dts is the overlay-ready DT which will make
> the RP1 driver to load the RP1 dtb overlay at runtime, while
> bcm2712-rpi-5-b-monolithic.dts is the fully defined one (i.e. it
> already contains RP1 node, so no overlay is loaded nor needed).
> Depending on which one we want to be considered the default, we can
> swap the file names to align with downstream naming convention that
> has only the fully defined DT called bcm2712-rpi-5-b.dts.
Could you please move some of this good explanation into this dts file 
as comment?
> ---
>   arch/arm64/boot/dts/broadcom/Makefile                     | 1 +
>   .../boot/dts/broadcom/bcm2712-rpi-5-b-monolithic.dts      | 8 ++++++++
>   2 files changed, 9 insertions(+)
>   create mode 100644 arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-monolithic.dts
>
> diff --git a/arch/arm64/boot/dts/broadcom/Makefile b/arch/arm64/boot/dts/broadcom/Makefile
> index 3d0efb93b06d..4836c6da5bee 100644
> --- a/arch/arm64/boot/dts/broadcom/Makefile
> +++ b/arch/arm64/boot/dts/broadcom/Makefile
> @@ -7,6 +7,7 @@ dtb-$(CONFIG_ARCH_BCM2835) += bcm2711-rpi-400.dtb \
>   			      bcm2711-rpi-4-b.dtb \
>   			      bcm2711-rpi-cm4-io.dtb \
>   			      bcm2712-rpi-5-b.dtb \
> +			      bcm2712-rpi-5-b-monolithic.dtb \
>   			      bcm2712-d-rpi-5-b.dtb \
>   			      bcm2837-rpi-3-a-plus.dtb \
>   			      bcm2837-rpi-3-b.dtb \
> diff --git a/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-monolithic.dts b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-monolithic.dts
> new file mode 100644
> index 000000000000..3aeee678b0bc
> --- /dev/null
> +++ b/arch/arm64/boot/dts/broadcom/bcm2712-rpi-5-b-monolithic.dts
> @@ -0,0 +1,8 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +/dts-v1/;
> +
> +#include "bcm2712-rpi-5-b.dts"
> +
> +&pcie2 {
> +	#include "rp1-nexus.dtsi"
> +};