linux-kernel - Re: [PATCH 04/14] dt-bindings: dma: add Canaan k210 to Synopsys DesignWare DMA

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Message-ID: <20220628110401.o6jy2kuyw3hhk3yy@mobilestation>
Date:   Tue, 28 Jun 2022 14:04:01 +0300
From:   Serge Semin <fancer.lancer@...il.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Rob Herring <robh@...nel.org>
Cc:     Conor Dooley <Conor.Dooley@...rochip.com>,
        Conor Dooley <mail@...chuod.ie>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>,
        Vinod <vkoul@...nel.org>, Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Palmer Dabbelt <palmer@...osinc.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        Niklas Cassel <niklas.cassel@....com>,
        Dillon Min <dillon.minfei@...il.com>,
        Heng Sia <jee.heng.sia@...el.com>,
        Jose Abreu <joabreu@...opsys.com>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        dmaengine <dmaengine@...r.kernel.org>,
        ALSA Development Mailing List <alsa-devel@...a-project.org>,
        linux-spi <linux-spi@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH 04/14] dt-bindings: dma: add Canaan k210 to Synopsys
 DesignWare DMA

On Tue, Jun 28, 2022 at 09:08:32AM +0200, Geert Uytterhoeven wrote:
> Hi Conor,
> 
> On Tue, Jun 28, 2022 at 8:30 AM <Conor.Dooley@...rochip.com> wrote:
> > On 28/06/2022 00:29, Rob Herring wrote:
> > > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> > >
> > > On Sat, Jun 18, 2022 at 01:30:26PM +0100, Conor Dooley wrote:
> > >> From: Conor Dooley <conor.dooley@...rochip.com>
> > >>
> > >> The Canaan k210 apparently has a Sysnopsys Designware AXI DMA
> > >> controller, but according to the documentation & devicetree it has 6
> > >> interrupts rather than the standard one. Add a custom compatible that
> > >> supports the 6 interrupt configuration which falls back to the standard
> > >> binding which is currently the one in use in the devicetree entry.
> > >

> > > But it works with only 1 interrupt?
> >
> > Seemingly...
> 
> The Linux driver uses the only first interrupt.

Folks, there v2 of this series. A more suitable and justified solution has
been given there:
Link: https://lore.kernel.org/lkml/20220627213450.ukqai4bsjzcwhnlp@mobilestation/

-Sergey

> 
> Gr{oetje,eeting}s,
> 
>                         Geert
> 
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org
> 
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
>                                 -- Linus Torvalds