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: 387817 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=-16.7 required=3.0 tests=BAYES_00, 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 8CC2CC433DB for ; Fri, 26 Feb 2021 14:04:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 44A3664F0D for ; Fri, 26 Feb 2021 14:04:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229996AbhBZOE3 (ORCPT ); Fri, 26 Feb 2021 09:04:29 -0500 Received: from mx2.suse.de ([195.135.220.15]:53628 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229991AbhBZOEA (ORCPT ); Fri, 26 Feb 2021 09:04:00 -0500 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 Cc: f.fainelli@gmail.com, robh+dt@kernel.org, robin.murphy@arm.com, ardb@kernel.org, hch@infradead.org, narmstrong@baylibre.com, dwmw2@infradead.org, linux@armlinux.org.uk, catalin.marinas@arm.com, arnd@arndb.de, will@kernel.org, Nicolas Saenz Julienne 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 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.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 */