linux-kernel - Re: [PATCH v4 2/4] arm64: dts: morello: Add support for common functionalities

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: Windows password security audit tool. GUI, reports in PDF.

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

Message-ID: <881c5084-3487-4ae2-9140-8d393e934652@arm.com>
Date: Tue, 7 Jan 2025 14:41:55 +0000
From: Vincenzo Frascino <vincenzo.frascino@....com>
To: Rob Herring <robh@...nel.org>
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org,
 Linus Walleij <linus.walleij@...aro.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Liviu Dudau <liviu.dudau@....com>,
 Sudeep Holla <sudeep.holla@....com>,
 Lorenzo Pieralisi <lpieralisi@...nel.org>,
 Russell King <linux@...linux.org.uk>
Subject: Re: [PATCH v4 2/4] arm64: dts: morello: Add support for common
 functionalities



On 03/01/2025 22:26, Rob Herring wrote:
> On Fri, Jan 3, 2025 at 12:16 PM Vincenzo Frascino
> <vincenzo.frascino@....com> wrote:
>>
>> The Morello architecture is an experimental extension to Armv8.2-A,
>> which extends the AArch64 state with the principles proposed in
>> version 7 of the Capability Hardware Enhanced RISC Instructions
>> (CHERI) ISA.
>>
>> The Morello Platform (soc) and the Fixed Virtual Platfom (fvp) share
>> some functionalities that have conveniently been included in
>> morello.dtsi to avoid duplication.
> 
> One more thing...
> 
>> +               i2c0: i2c@...f0000 {
>> +                       compatible = "cdns,i2c-r1p14";
>> +                       reg = <0x0 0x1c0f0000 0x0 0x1000>;
>> +                       interrupts = <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>;
>> +                       clocks = <&dpu_aclk>;
>> +
>> +                       #address-cells = <1>;
>> +                       #size-cells = <0>;
>> +
>> +                       status = "disabled";
>> +
>> +                       hdmi_tx: hdmi-transmitter@70 {
>> +                               compatible = "nxp,tda998x";
> 
> It is odd that you add this node here, but don't enable i2c. If this
> is shared with fvp, then enable i2c here. If it isn't, then move this
> to the soc/sdb .dts.
>

This node should be on the dts file. I had it there in v2 and I can't recall the
rationale for which I moved it here. It is clearly wrong. I will move it back in
v5.

> I'd rather see the FVP dts now rather than later so we can review how
> you split things. It's a little odd not being soc.dtsi and board.dts,
> but that's fine I think.

I do not have a complete DTS for FVP yet (I was planning to work on after this
series is merged). Is it OK if I post it with a future series and we move things
around at that stage if there is a need?

>
>> +                               reg = <0x70>;
>> +                               video-ports = <0x234501>;
>> +                               port {
>> +                                       tda998x_0_input: endpoint {
>> +                                               remote-endpoint = <&dp_pl0_out0>;
>> +                                       };
>> +                               };
>> +                       };
>> +               };

-- 
Regards,
Vincenzo