From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3B610C48BE6 for ; Wed, 16 Jun 2021 11:18:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 181FE60FD9 for ; Wed, 16 Jun 2021 11:18:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231921AbhFPLUg (ORCPT ); Wed, 16 Jun 2021 07:20:36 -0400 Received: from mail-ua1-f50.google.com ([209.85.222.50]:45728 "EHLO mail-ua1-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231741AbhFPLUg (ORCPT ); Wed, 16 Jun 2021 07:20:36 -0400 Received: by mail-ua1-f50.google.com with SMTP id v17so627201uar.12; Wed, 16 Jun 2021 04:18:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=KFppgdT7CLKOLDaLJGeivAUUwv8mpERUMDgjR5mFX2Q=; b=BBeVsvoZ4AVSy+Y8yHwdEmm5VnqLTJRxB/oarkG9s8C2HRFpJvpV+Y7+gkXdhdzCYt u4gaF3RUWOnSk7QWmQPj7ejeGSlZAeTfbC28/PXrdt8awQpGrlkRIoEhANUrvvRxSoyw 3eVOo93+6DEDuBDZ/KwPQHg++XM7nzuLRTtUggwGA+FqHWeU1femrCrTUarsi5PLXOf6 GcmwOWzKQsjK5jwTp2qkrJW7XbmWyRyHPOPTvkQ97OnIMc62PmAbzh7UsxsdoJ9f2ZEA TZvaW2iEjYkB3/73sZqNGjJZQ6RjwwzWNqg+mp2U7n6mF48qBWrN2dxUZmKY34MKnAag jY3Q== X-Gm-Message-State: AOAM530+WmRtpWEfnV0XLLJs/TZZdUYqwriS8gjlBz5xfdYJ1RlZxr6d aDD8hRf3fwcCqIOFf6l9dyjmAdY/YbBvXisARXk= X-Google-Smtp-Source: ABdhPJy9W5ndu5bvPys51QNrj75YVXl0pvjisg4IJQA0U4LMfMINRJyD7Z5sYALWQifxuYErXQHn1iBe9VLGxsU9S+A= X-Received: by 2002:ab0:647:: with SMTP id f65mr3978118uaf.4.1623842308529; Wed, 16 Jun 2021 04:18:28 -0700 (PDT) MIME-Version: 1.0 References: <0c6bdd6a-826c-6831-1477-3a1e782cced3@physik.fu-berlin.de> In-Reply-To: <0c6bdd6a-826c-6831-1477-3a1e782cced3@physik.fu-berlin.de> From: Geert Uytterhoeven Date: Wed, 16 Jun 2021 13:18:17 +0200 Message-ID: Subject: Re: [PATCH 0/3] Remove shdma DT support To: John Paul Adrian Glaubitz Cc: Rob Herring , Vinod Koul , Magnus Damm , Guennadi Liakhovetski , Laurent Pinchart , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , dmaengine , Linux-Renesas , Linux-sh list , Linux ARM , Chris Brandt Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org Hi Adrian, On Wed, Jun 16, 2021 at 12:42 PM John Paul Adrian Glaubitz 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