linux-kernel - Re: [PATCH v4 5/7] dmaengine: sh: rz-dmac: Allow for multiple DMACs

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Message-ID: <CAMuHMdVmR60=jUZvzNuAe66KGYS+1iqO-kG9hgPHQ_RXh+YPQg@mail.gmail.com>
Date: Mon, 24 Feb 2025 14:00:54 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Fabrizio Castro <fabrizio.castro.jz@...esas.com>
Cc: Vinod Koul <vkoul@...nel.org>, Wolfram Sang <wsa+renesas@...g-engineering.com>, 
	Biju Das <biju.das.jz@...renesas.com>, 
	Uwe Kleine-König <u.kleine-koenig@...libre.com>, 
	dmaengine@...r.kernel.org, linux-kernel@...r.kernel.org, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>, linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH v4 5/7] dmaengine: sh: rz-dmac: Allow for multiple DMACs

On Thu, 20 Feb 2025 at 16:01, Fabrizio Castro
<fabrizio.castro.jz@...esas.com> wrote:
> dma_request_channel() calls into __dma_request_channel() with
> NULL as value for np, which won't allow for the selection of the
> correct DMAC when multiple DMACs are available.
>
> Switch to using __dma_request_channel() directly so that we can
> choose the desired DMA for the channel. This is in preparation
> of adding DMAC support for the Renesas RZ/V2H(P) and similar SoCs.
>
> Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@...esas.com>

Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

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