From patchwork Fri Feb 26 14:02:55 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicolas Saenz Julienne X-Patchwork-Id: 12106697 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=-16.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 933B0C433E0 for ; Fri, 26 Feb 2021 14:05:28 +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 2D22F64E54 for ; Fri, 26 Feb 2021 14:05:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2D22F64E54 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=suse.de Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=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-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=PC7Uv8n3G4lGF+mJw7PN6XNgBnGxSapRvwfSPCATqp8=; b=UF5GqVoHNEkZv4CEwk2X5HP2J gHsgaiBHkMwwZjYqWE/ZD0MoMreRLJF0ZGrCuiT02afZcCu30mPzjPdmo5so0hHbp83/S5Baq19oO u/ONvfZtvRmZjNrrW1xloGjdb5YAZO0GoOjt7FCEWTX0ggISIiNg4fCOxoKi6KevdOMzKaAq8PQv/ 286BjcUeYnMDFNZmlDCTro75E6JmU+jqcIoI8CN/prKrY+Te2MjiVLxyoakz3zll/3qViJ0hqoAlf Y03Z5nUzJzw2zIm+3VcbJErfrPZcJRIZ5xBYZPDGjpKjt345Pa6c2guKCfFi+ZVFztlDHUmMkNo8d hyhiafBQA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1lFdiO-0003un-1V; Fri, 26 Feb 2021 14:03:32 +0000 Received: from mx2.suse.de ([195.135.220.15]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1lFdiD-0003nJ-EO for linux-arm-kernel@lists.infradead.org; Fri, 26 Feb 2021 14:03:22 +0000 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id C3E23AD73; Fri, 26 Feb 2021 14:03:17 +0000 (UTC) From: Nicolas Saenz Julienne To: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [RFC 03/13] of: device: Introduce of_mmio_configure() Date: Fri, 26 Feb 2021 15:02:55 +0100 Message-Id: <20210226140305.26356-4-nsaenzjulienne@suse.de> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210226140305.26356-1-nsaenzjulienne@suse.de> References: <20210226140305.26356-1-nsaenzjulienne@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210226_090321_637128_B7CC175B X-CRM114-Status: GOOD ( 14.68 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: f.fainelli@gmail.com, arnd@arndb.de, narmstrong@baylibre.com, dwmw2@infradead.org, linux@armlinux.org.uk, hch@infradead.org, will@kernel.org, robh+dt@kernel.org, catalin.marinas@arm.com, robin.murphy@arm.com, ardb@kernel.org, Nicolas Saenz Julienne Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The function will traverse a device's bus hierarchy looking for MMIO limited buses. If found it'll populate the relevant struct device quirks. Signed-off-by: Nicolas Saenz Julienne --- drivers/of/device.c | 19 +++++++++++++++++++ include/linux/of_device.h | 8 ++++++++ 2 files changed, 27 insertions(+) diff --git a/drivers/of/device.c b/drivers/of/device.c index 6cb86de404f1..b80367a2764b 100644 --- a/drivers/of/device.c +++ b/drivers/of/device.c @@ -169,6 +169,25 @@ int of_dma_configure_id(struct device *dev, struct device_node *np, } EXPORT_SYMBOL_GPL(of_dma_configure_id); +int of_mmio_configure(struct device *dev, struct device_node *np) +{ +#if defined(CONFIG_ARCH_HAS_64BIT_MMIO_BROKEN) + struct device_node *node = of_node_get(np); + + do { + if (of_property_read_bool(node, "64bit-mmio-broken")) { + dev->mmio_64bit_broken = true; + dev_dbg(dev, "device behind 64bit mmio broken bus\n"); + break; + } + } while ((node = of_get_next_parent(node))); + + of_node_put(node); +#endif + return 0; +} +EXPORT_SYMBOL_GPL(of_mmio_configure); + int of_device_register(struct platform_device *pdev) { device_initialize(&pdev->dev); diff --git a/include/linux/of_device.h b/include/linux/of_device.h index 1d7992a02e36..c465edd509c7 100644 --- a/include/linux/of_device.h +++ b/include/linux/of_device.h @@ -56,6 +56,9 @@ static inline int of_dma_configure(struct device *dev, { return of_dma_configure_id(dev, np, force_dma, NULL); } + +int of_mmio_configure(struct device *dev, struct device_node *np); + #else /* CONFIG_OF */ static inline int of_driver_match_device(struct device *dev, @@ -112,6 +115,11 @@ static inline int of_dma_configure(struct device *dev, { return 0; } + +static inline int of_mmio_configure(struct device *dev, struct device_node *np); +{ + return 0; +} #endif /* CONFIG_OF */ #endif /* _LINUX_OF_DEVICE_H */