From: Geert Uytterhoeven <geert@linux-m68k.org> To: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Rob Herring <robh+dt@kernel.org>, Vinod Koul <vkoul@kernel.org>, Magnus Damm <magnus.damm@gmail.com>, Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>, Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>, "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@vger.kernel.org>, dmaengine <dmaengine@vger.kernel.org>, Linux-Renesas <linux-renesas-soc@vger.kernel.org>, Linux-sh list <linux-sh@vger.kernel.org>, Linux ARM <linux-arm-kernel@lists.infradead.org>, Chris Brandt <Chris.Brandt@renesas.com> Subject: Re: [PATCH 0/3] Remove shdma DT support Date: Wed, 16 Jun 2021 13:18:17 +0200 [thread overview] Message-ID: <CAMuHMdU_B4pRyaz4nhp3k0dtXy3A8tRYbdCpmYYaSpzeZCeWOw@mail.gmail.com> (raw) In-Reply-To: <0c6bdd6a-826c-6831-1477-3a1e782cced3@physik.fu-berlin.de> Hi Adrian, On Wed, Jun 16, 2021 at 12:42 PM John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> wrote: > On 6/11/21 12:18 PM, Geert Uytterhoeven wrote: > > Hence this series removes the Renesas SHDMA Device Tree bindings, the > > SHDMA DMA multiplexer driver, and the corresponding description in the > > R-Mobile APE6 DTS. > Do these changes make life harder in case we want to convert SH to device > tree as already prepared by Yoshinori Sato? [1] Probably not. The only modern DT-aware DMAC drivers for Renesas hardware are drivers/dma/sh/{rcar,usb}-dmac.c. Soon there will be drivers/dma/sh/rz-dmac.c, for RZ/G2L (and RZ/A1 and RZ/A2 later). Given the R-Car DMAC is very similar to the SH/R-Mobile DMAC, the latter may be made to work with rcar-dmac.c, if anyone is willing to spend cycles on that. Likewise, the RZ/A DMAC probably has its roots in older SH SoCs, so that may be helpful for you, too. Chris (CCed) may know better... > > [1] https://lore.kernel.org/patchwork/cover/693910/ None of these handle DMA? Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org> To: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> Cc: Rob Herring <robh+dt@kernel.org>, Vinod Koul <vkoul@kernel.org>, Magnus Damm <magnus.damm@gmail.com>, Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>, Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>, "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@vger.kernel.org>, dmaengine <dmaengine@vger.kernel.org>, Linux-Renesas <linux-renesas-soc@vger.kernel.org>, Linux-sh list <linux-sh@vger.kernel.org>, Linux ARM <linux-arm-kernel@lists.infradead.org>, Chris Brandt <Chris.Brandt@renesas.com> Subject: Re: [PATCH 0/3] Remove shdma DT support Date: Wed, 16 Jun 2021 13:18:17 +0200 [thread overview] Message-ID: <CAMuHMdU_B4pRyaz4nhp3k0dtXy3A8tRYbdCpmYYaSpzeZCeWOw@mail.gmail.com> (raw) In-Reply-To: <0c6bdd6a-826c-6831-1477-3a1e782cced3@physik.fu-berlin.de> Hi Adrian, On Wed, Jun 16, 2021 at 12:42 PM John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de> wrote: > On 6/11/21 12:18 PM, Geert Uytterhoeven wrote: > > Hence this series removes the Renesas SHDMA Device Tree bindings, the > > SHDMA DMA multiplexer driver, and the corresponding description in the > > R-Mobile APE6 DTS. > Do these changes make life harder in case we want to convert SH to device > tree as already prepared by Yoshinori Sato? [1] Probably not. The only modern DT-aware DMAC drivers for Renesas hardware are drivers/dma/sh/{rcar,usb}-dmac.c. Soon there will be drivers/dma/sh/rz-dmac.c, for RZ/G2L (and RZ/A1 and RZ/A2 later). Given the R-Car DMAC is very similar to the SH/R-Mobile DMAC, the latter may be made to work with rcar-dmac.c, if anyone is willing to spend cycles on that. Likewise, the RZ/A DMAC probably has its roots in older SH SoCs, so that may be helpful for you, too. Chris (CCed) may know better... > > [1] https://lore.kernel.org/patchwork/cover/693910/ None of these handle DMA? Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-06-16 11:18 UTC|newest] Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-06-11 10:18 [PATCH 0/3] Remove shdma DT support Geert Uytterhoeven 2021-06-11 10:18 ` Geert Uytterhoeven 2021-06-16 10:38 ` Vinod Koul 2021-06-16 10:38 ` Vinod Koul 2021-06-16 10:42 ` John Paul Adrian Glaubitz 2021-06-16 10:42 ` John Paul Adrian Glaubitz 2021-06-16 11:18 ` Geert Uytterhoeven [this message] 2021-06-16 11:18 ` Geert Uytterhoeven
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=CAMuHMdU_B4pRyaz4nhp3k0dtXy3A8tRYbdCpmYYaSpzeZCeWOw@mail.gmail.com \ --to=geert@linux-m68k.org \ --cc=Chris.Brandt@renesas.com \ --cc=devicetree@vger.kernel.org \ --cc=dmaengine@vger.kernel.org \ --cc=glaubitz@physik.fu-berlin.de \ --cc=guennadi.liakhovetski@linux.intel.com \ --cc=laurent.pinchart+renesas@ideasonboard.com \ --cc=linux-arm-kernel@lists.infradead.org \ --cc=linux-renesas-soc@vger.kernel.org \ --cc=linux-sh@vger.kernel.org \ --cc=magnus.damm@gmail.com \ --cc=robh+dt@kernel.org \ --cc=vkoul@kernel.org \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.