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=-0.8 required=3.0 tests=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 C0783C2D0B1 for ; Tue, 4 Feb 2020 09:27:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9CEDF21775 for ; Tue, 4 Feb 2020 09:27:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726566AbgBDJ1v (ORCPT ); Tue, 4 Feb 2020 04:27:51 -0500 Received: from mail-oi1-f193.google.com ([209.85.167.193]:39145 "EHLO mail-oi1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726506AbgBDJ1v (ORCPT ); Tue, 4 Feb 2020 04:27:51 -0500 Received: by mail-oi1-f193.google.com with SMTP id z2so17756230oih.6; Tue, 04 Feb 2020 01:27:50 -0800 (PST) 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=8T5fw9gOqicQppobj9BJvC4APp3/qzGMetKFD287xWQ=; b=ccGwVEiQB10vkjNV6CKlE0U/+xHZBsuDMuO5D6RbAWMiNK0W48AxTIUsEPfEx0ZK8r WnG6TX2XQhg9MLjMKKHXC5aR2Lh8geX7wMWrLQh2qvzwRKk2jWCq1OdLzYH1XbeG9DWm voZd9B+MWOhAr0ySHeY3m6oht2z5XJExdemzjCpqDCPyfyJmRXq2ZK1RoD4MgoBtJYDM WzDPZzMKa5SPsIAgGWXt4Xd28ZE7iozyFNM9UD4nckOgKe/P9v8F62p27bwqiBhVnUHM vmGVcymMP8yvT3+vyx7i7D2zlR1v0mfJP/juIa9ISZD4VXZRTpvTtSsl8m0Z2FLhW1dL dZZw== X-Gm-Message-State: APjAAAVD8WbiSUMvrWRrW2Ld5lz8t++KaHIB4L9qPw4138tQbz/LK1Gj D2TKqJB+ZazcgkMT1SJ2HnpcT8PkIdsE8dE7j0c= X-Google-Smtp-Source: APXvYqzmkfJGFae+HBndS734aj6PhSlmVR2Jqfp8fQKldQAUeizqJ3a92Ns/NfbKC1toqf1ZEP0claVaB5qgY5YjcSk= X-Received: by 2002:aca:48cd:: with SMTP id v196mr2958150oia.102.1580808470541; Tue, 04 Feb 2020 01:27:50 -0800 (PST) MIME-Version: 1.0 References: <20200203101806.2441-1-peter.ujfalusi@ti.com> <701ab186-c240-3c37-2c0b-8ac195f8073f@ti.com> <38f686ae-66fa-0e3a-ec2e-a09fc4054ac4@physik.fu-berlin.de> <64cffbfe-a639-c09d-8aa2-fdda8fad2cf7@landley.net> In-Reply-To: <64cffbfe-a639-c09d-8aa2-fdda8fad2cf7@landley.net> From: Geert Uytterhoeven Date: Tue, 4 Feb 2020 10:27:38 +0100 Message-ID: Subject: Re: [PATCH 0/3] dmaengine: Stear users towards dma_request_slave_chan() To: Rob Landley Cc: Peter Ujfalusi , John Paul Adrian Glaubitz , Andy Shevchenko , Vinod Koul , dmaengine , Dan Williams , Linux-sh list , Linux-Renesas Content-Type: text/plain; charset="UTF-8" Sender: dmaengine-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: dmaengine@vger.kernel.org Hi Rob, On Tue, Feb 4, 2020 at 10:12 AM Rob Landley wrote: > On 2/4/20 2:01 AM, Geert Uytterhoeven wrote: > > On Tue, Feb 4, 2020 at 7:52 AM Peter Ujfalusi wrote: > >> On 03/02/2020 22.34, Geert Uytterhoeven wrote: > >>> On Mon, Feb 3, 2020 at 9:21 PM John Paul Adrian Glaubitz > >>> wrote: > >>>> On 2/3/20 2:32 PM, Geert Uytterhoeven wrote: > >>>>> Both rspi and sh-msiof have users on legacy SH (i.e. without DT): > >>>> > >>>> FWIW, there is a patch set by Yoshinori Sato to add device tree support > >>>> for classical SuperH hardware. It was never merged, unfortunately :(. > >>> > >>> True. > >>> > >>>>> Anyone who cares for DMA on SuperH? > >>>> > >>>> What is DMA used for on SuperH? Wouldn't dropping it cut support for > >>>> essential hardware features? > >>> > >>> It may make a few things slower. > > The j-core stuff has DMA but we haven't hooked it up to dmaengine yet. (It's on > the todo list but pretty far down.) And would use DT. Hence the issue is not applicable to j-core. > The turtle boards need it USB, ethernet, and sdcard, but Rich Felker hasn't > finished the j32 port yet (we just got him the updated docs last month) and the > existing implementation is nommu so the things that are using it are reaching > around behind the OS's back... Is j32 the (rebranded) j4? 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