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,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 DA69DC433E1 for ; Sun, 26 Jul 2020 16:06:59 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A4C36206D8 for ; Sun, 26 Jul 2020 16:06:59 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="forybWkj"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=crapouillou.net header.i=@crapouillou.net header.b="bPgAF82U" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A4C36206D8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=crapouillou.net Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:To: Subject:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=Phz3lnoU8VtJVngH067dNYZqkGVioMBzCHLENLcwIxU=; b=forybWkjUHPgbM7O6dHjZIHic sffpzUgKbTrTJXToUr2LLNnsXkN6xW0uGu114VYvh/IMhAkxcSZixtapY5wMpHMy1jhhhWWIDncog /HGQ7p5F5EWqQtP7N+o7t5RUnReUOgVmpJgVkN3WeeMvMDGDa4c2NYZoIHN8c0fmAahg9lh1WUxAq URuc0wvjYNhGO9vetb8e9VDybkUaIqlOXgwB1RH3hp+VAwHunJHTi64G1KrDuaB5JrRRYP1757MCG NW2Y7ozk55cKu7sD3MaaZ9oYPjRSaVZ+6iJ4ijAUrZA0HK6bZacgYgzwO0nWLqeX1dzr92JQ6SLmW FIk3nVA8g==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jzjAT-0004fW-9M; Sun, 26 Jul 2020 16:06:29 +0000 Received: from crapouillou.net ([89.234.176.41]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jzjAQ-0004cs-SS for linux-mtd@lists.infradead.org; Sun, 26 Jul 2020 16:06:27 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=crapouillou.net; s=mail; t=1595779582; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=d/PZVTcv9XrEDcYY/++e3Teye8k7bnbbZV/Cr5UVzy8=; b=bPgAF82UdLVnLdfUjsPgthYqEap5z1iDg/vjuXj6N456wugpclWOY0YZ3kzPZue4Tn1Ayk OStaiEu+djv0OyQZJr1RkXKj3UvE3XnStlDxd2UXiCAoVGLt22b2BSJUbdYOwxfJgq/EEO RXFikV31lzuZFk8CbOgd4cBd2fs2aK4= Date: Sun, 26 Jul 2020 18:06:13 +0200 From: Paul Cercueil Subject: Re: [PATCH v3 2/2] mtd: rawnand: ingenic: Limit MTD_NAND_JZ4780 to architecture only To: Arnd Bergmann Message-Id: In-Reply-To: References: <20200724145401.2566-1-krzk@kernel.org> <20200724145401.2566-3-krzk@kernel.org> <20200724155436.GA7460@kozik-lap> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200726_120627_133444_1F3D9C3F X-CRM114-Status: GOOD ( 18.10 ) X-BeenThere: linux-mtd@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Vignesh Raghavendra , Richard Weinberger , linux-kernel@vger.kernel.org, Krzysztof Kozlowski , Harvey Hunt , linux-mtd , Miquel Raynal Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="iso-8859-1"; Format="flowed" Sender: "linux-mtd" Errors-To: linux-mtd-bounces+linux-mtd=archiver.kernel.org@lists.infradead.org Le sam. 25 juil. 2020 =E0 20:30, Arnd Bergmann a =E9crit : > On Sat, Jul 25, 2020 at 2:17 PM Paul Cercueil = > wrote: >> Le ven. 24 juil. 2020 =E0 17:54, Krzysztof Kozlowski = >> a >> =E9crit : >> > On Fri, Jul 24, 2020 at 05:50:06PM +0200, Paul Cercueil wrote: >> >> Le ven. 24 juil. 2020 =E0 17:33, Krzysztof Kozlowski >> >> a =E9crit: >> >> > On Fri, 24 Jul 2020 at 17:19, Paul Cercueil = >> >> >> > wrote: >> >> >> >> On MIPS, the SoC selection is a Kconfig "choice", so you can = >> only >> >> support >> >> one SoC family, unfortunately. >> > >> > Let's say someone selected then some other architecture >> > (MIPS_ALCHEMY). >> > They could select this MTD driver. >> > >> > Does it mean they would be able to run it on Ingenic hardware? >> = >> In *theory* yes, as long as the Kconfig options that MACH_INGENIC >> selects are enabled, the kernel should boot and work on Ingenic = >> SoCs. > = > Right now, this won't work yet, because there are platform specific > functions that are implemented by each of the platforms in arch/mips, > e.g. arch/mips/generic/init.c and arch/mips/jz4740/setup.c. > = > A lot of the newer platforms are part of arch/mips/generic > (CONFIG_MIPS_GENERIC), which roughly corresponds to > CONFIG_ARCH_MULTIPLATFORM on in arch/arm/. > Similarly, there are header files in arch/mips/include/asm/mach-*/ > that conflict and you need to have the right one. > = > To have more than one platform enabled, each one needs to > have all of that platform code converted to fit into the > MIPS_GENERIC framework. This can be a lot of work, but > I suppose the ingenic platform would be a candidate for > which this makes sense, as long as new SoCs of that family > still come out. It should be much less work now that the vast majority of = arch/mips/jz4740 is gone. The code left is pretty much generic. I can = have a look to convert it to the MIPS_GENERIC framework. Although the code there is scary. Have a look at = arch/mips/include/asm/{machine,mips_machine}.h, you'll see what I mean. Anyway, I think we're way past the scope of this patch, so for this one: Acked-by: Paul Cercueil Cheers, -Paul ______________________________________________________ Linux MTD discussion mailing list http://lists.infradead.org/mailman/listinfo/linux-mtd/