linux-kernel - Re: [PATCH v6 01/12] dt-bindings: add img,pvrsgx.yaml for Imagination GPUs

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: <72919514-0657-4B71-902F-3E775E528F64@goldelico.com>
Date:   Wed, 15 Apr 2020 14:43:10 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Maxime Ripard <maxime@...no.tech>
Cc:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Benoît Cousson <bcousson@...libre.com>,
        Tony Lindgren <tony@...mide.com>,
        Paul Cercueil <paul@...pouillou.net>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paulburton@...nel.org>,
        James Hogan <jhogan@...nel.org>, Kukjin Kim <kgene@...nel.org>,
        Krzysztof Kozlowski <krzk@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Philipp Rossak <embed3d@...il.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org,
        openpvrsgx-devgroup@...ux.org, letux-kernel@...nphoenux.org,
        kernel@...a-handheld.com, linux-mips@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org
Subject: Re: [PATCH v6 01/12] dt-bindings: add img,pvrsgx.yaml for Imagination GPUs


> Am 15.04.2020 um 12:12 schrieb Maxime Ripard <maxime@...no.tech>:
> 
> Hi,
> 
> On Wed, Apr 15, 2020 at 10:35:08AM +0200, H. Nikolaus Schaller wrote:
>> The Imagination PVR/SGX GPU is part of several SoC from
>> multiple vendors, e.g. TI OMAP, Ingenic JZ4780, Intel Poulsbo,
>> Allwinner A83 and others.
>> 
>> With this binding, we describe how the SGX processor is
>> interfaced to the SoC (registers, interrupt etc.).
>> 
>> In most cases, Clock, Reset and power management is handled
>> by a parent node or elsewhere (e.g. code in the driver).
> 
> Wouldn't the "code in the driver" still require the clock / reset /
> power domain to be set in the DT?

Well, some SoC seem to use existing clocks and have no reset.
Or, although not recommended, they may have the io-address range
hard-coded.

BR,
Nikolaus