From patchwork Tue Feb 14 17:01:43 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gregory CLEMENT X-Patchwork-Id: 9572277 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id E68D960578 for ; Tue, 14 Feb 2017 17:03:01 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C7A92205AF for ; Tue, 14 Feb 2017 17:03:01 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BC1CC2842F; Tue, 14 Feb 2017 17:03:01 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [65.50.211.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 3BE67205AF for ; Tue, 14 Feb 2017 17:03:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id: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=h/S6ddDldBLsJ9TzTeLkzZ9BtN1ppqRypwtaB8EAl7c=; b=YzezEEIGHNbOkik2SgGEKDAP+L WCLZqHLigx3BgTgVTR7MuCKxf26VA0Q58WM2GgYAgDDgY5ANeoT2vPqFmSHDln8zVzBaJSjuz41Ud 3w+/+RsNAdZ4+It/Lr/yF1rsbz4QzTZFqqAYNXTJrm+p3PcQBNY/ATle6tK+Q7ChVfHCNktPNoAuq X0QidckTamHAvqc017DFG1PxTbUJr1pDIOJmeaFNla8nA4zpcbcvPr5vdXmhOTDo2gN2NpljMa2Re qBe4cKpZN8RG4joZBgKgASXp/2JEDWqzNpdOzbbtTxxteUVQv2+2Hd85FvESWUYMQA9kjZOWcICUt oxZ31bXA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cdgVA-0002nF-36; Tue, 14 Feb 2017 17:02:52 +0000 Received: from mail.free-electrons.com ([62.4.15.54]) by bombadil.infradead.org with esmtp (Exim 4.87 #1 (Red Hat Linux)) id 1cdgUs-0002OQ-He for linux-arm-kernel@lists.infradead.org; Tue, 14 Feb 2017 17:02:36 +0000 Received: by mail.free-electrons.com (Postfix, from userid 110) id 140382076B; Tue, 14 Feb 2017 18:02:12 +0100 (CET) Received: from localhost (83.146.29.93.rev.sfr.net [93.29.146.83]) by mail.free-electrons.com (Postfix) with ESMTPSA id D96662045B; Tue, 14 Feb 2017 18:02:01 +0100 (CET) From: Gregory CLEMENT To: Ulf Hansson , Adrian Hunter , linux-mmc@vger.kernel.org Subject: [PATCH v6 03/14] mmc: core: Add mmc-card dt sub-node parse in core layer Date: Tue, 14 Feb 2017 18:01:43 +0100 Message-Id: <34e51d32c82b57571e061e80df3bbaed731db554.1487091464.git-series.gregory.clement@free-electrons.com> X-Mailer: git-send-email 2.11.0 In-Reply-To: References: In-Reply-To: References: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20170214_090234_952409_62687EB2 X-CRM114-Status: GOOD ( 12.84 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jimmy Xu , Andrew Lunn , Mike Turquette , Nadav Haklai , Ziji Hu , Victor Gu , Doug Jones , linux-clk@vger.kernel.org, Jisheng Zhang , Yehuda Yitschak , Marcin Wojtas , Kostya Porotchkin , Hanna Hawa , Sebastian Hesselbarth , devicetree@vger.kernel.org, Jason Cooper , Rob Herring , Ryan Gao , Gregory CLEMENT , "Wei\(SOCP\) Liu" , linux-arm-kernel@lists.infradead.org, Thomas Petazzoni , Stephen Boyd , linux-kernel@vger.kernel.org, Wilson Ding MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Hu Ziji Some vendor host, like Xenon, can support multiple types. In dts, use mmc-card dt sub-node to indicate eMMC is in use. Add a generic mmc-card parse function in mmc core layer. If mmc-card sub-node is detected, set eMMC common caps, such as MMC_CAP_NONREMOVABLE, MMC_CAP2_NO_SD and MMC_CAP2_NO_SDIO. Since it is likely that struct mmc_card is not allocated yet when this mmc-card parse function is called, it will return true if mmc-card sub-node is detected. Otherwise, return false. It can help vendor host determine if the card type is eMMC. Signed-off-by: Hu Ziji Signed-off-by: Gregory CLEMENT --- drivers/mmc/core/mmc.c | 24 ++++++++++++++++++++++++ include/linux/mmc/core.h | 2 ++ 2 files changed, 26 insertions(+) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index b61b52f9da3d..dc480006a303 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -2111,6 +2111,30 @@ static const struct mmc_bus_ops mmc_ops = { }; /* + * Parse mmc-card dt sub-node and set eMMC common caps + * if mmc-card exists. + * If mmc-card is detected, return true. + * Otherwise, return false. + */ +bool mmc_of_parse_mmc_card(struct mmc_host *host) +{ + struct device_node *np; + bool ret = false; + + np = mmc_of_find_child_device(host, 0); + if (np && of_device_is_compatible(np, "mmc-card")) { + /* mmc-card sub-node indicates eMMC card is in use. */ + host->caps |= MMC_CAP_NONREMOVABLE; + host->caps2 |= MMC_CAP2_NO_SDIO | MMC_CAP2_NO_SD; + ret = true; + } + + of_node_put(np); + return ret; +} +EXPORT_SYMBOL_GPL(mmc_of_parse_mmc_card); + +/* * Starting point for MMC card init. */ int mmc_attach_mmc(struct mmc_host *host) diff --git a/include/linux/mmc/core.h b/include/linux/mmc/core.h index e33cc748dcfe..1b27323f3b6e 100644 --- a/include/linux/mmc/core.h +++ b/include/linux/mmc/core.h @@ -234,4 +234,6 @@ struct device_node; extern u32 mmc_vddrange_to_ocrmask(int vdd_min, int vdd_max); extern int mmc_of_parse_voltage(struct device_node *np, u32 *mask); +extern bool mmc_of_parse_mmc_card(struct mmc_host *host); + #endif /* LINUX_MMC_CORE_H */