From patchwork Sat Dec 8 08:39:20 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?WW9uZyBXdSAo5ZC05YuHKQ==?= X-Patchwork-Id: 10719239 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 165811750 for ; Sat, 8 Dec 2018 08:42:38 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 04E412CF9D for ; Sat, 8 Dec 2018 08:42:38 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id ED32A2CF9F; Sat, 8 Dec 2018 08:42:37 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 8BBAC2CF9D for ; Sat, 8 Dec 2018 08:42:37 +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: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=TM3MXoCGgExs+rBPj8AbFcSGpLL5GxmOt1SODash790=; b=kFzbZdUZImVlao zZl4//HN4qPPqv+OYTolg10f85Xo9OGp+Tk1Gbs1fA29pmBVpFmlq1AM6pabvOHAbjqXK8AHySElU Ic1pSLmmstO+oZQ3tWQBWWZowHkDFiGjos83TqzQ/tCUV4RM4E0937iQpFAHz5luIzdPSU9imVP/Y mAuqFH8q9Xpk3a+Jqj2NIEl0H4nif9cinlL+6pE55ShF7z6QYoXpFmSZNwAOoqYT2Ku1Rk2dlWEF9 b+kcFkuOYplaHhp87jADBbtlzgI9147EApaCOeGyR/37hVPK9QsMIOgzfePgCfFSchS44Ln3KksaI HJf9qKxlE8JMthWfS+PA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gVYBx-0003rP-Am; Sat, 08 Dec 2018 08:42:29 +0000 Received: from [210.61.82.183] (helo=mailgw01.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gVYBZ-0003KT-QI; Sat, 08 Dec 2018 08:42:24 +0000 X-UUID: 295a30747e084767a176675274b82b5f-20181208 X-UUID: 295a30747e084767a176675274b82b5f-20181208 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1859802803; Sat, 08 Dec 2018 16:41:51 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs03n1.mediatek.inc (172.21.101.181) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Sat, 8 Dec 2018 16:41:50 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Sat, 8 Dec 2018 16:41:49 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Robin Murphy , Rob Herring Subject: [PATCH v4 07/18] iommu/mediatek: Add bclk can be supported optionally Date: Sat, 8 Dec 2018 16:39:20 +0800 Message-ID: <1544258371-4600-8-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1544258371-4600-1-git-send-email-yong.wu@mediatek.com> References: <1544258371-4600-1-git-send-email-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181208_004206_253309_AFB326DC X-CRM114-Status: GOOD ( 12.45 ) 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: youlin.pei@mediatek.com, devicetree@vger.kernel.org, Nicolas Boichat , arnd@arndb.de, srv_heupstream@mediatek.com, Will Deacon , linux-kernel@vger.kernel.org, Tomasz Figa , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, yong.wu@mediatek.com, Arvind Yadav , yingjoe.chen@mediatek.com, linux-arm-kernel@lists.infradead.org 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 In some SoCs, M4U doesn't have its "bclk", it will use the EMI clock instead which has always been enabled when entering kernel. This also is a preparing patch for mt8183. Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 10 +++++++--- drivers/iommu/mtk_iommu.h | 3 +++ 2 files changed, 10 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 8eb110e..eda062a 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -610,9 +610,11 @@ static int mtk_iommu_probe(struct platform_device *pdev) if (data->irq < 0) return data->irq; - data->bclk = devm_clk_get(dev, "bclk"); - if (IS_ERR(data->bclk)) - return PTR_ERR(data->bclk); + if (data->plat_data->has_bclk) { + data->bclk = devm_clk_get(dev, "bclk"); + if (IS_ERR(data->bclk)) + return PTR_ERR(data->bclk); + } larb_nr = of_count_phandle_with_args(dev->of_node, "mediatek,larbs", NULL); @@ -736,11 +738,13 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev) static const struct mtk_iommu_plat_data mt2712_data = { .m4u_plat = M4U_MT2712, .has_4gb_mode = true, + .has_bclk = true, }; static const struct mtk_iommu_plat_data mt8173_data = { .m4u_plat = M4U_MT8173, .has_4gb_mode = true, + .has_bclk = true, }; static const struct of_device_id mtk_iommu_of_ids[] = { diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h index 5890e55..b8749ac 100644 --- a/drivers/iommu/mtk_iommu.h +++ b/drivers/iommu/mtk_iommu.h @@ -44,6 +44,9 @@ enum mtk_iommu_plat { struct mtk_iommu_plat_data { enum mtk_iommu_plat m4u_plat; bool has_4gb_mode; + + /* HW will use the EMI clock if there isn't the "bclk". */ + bool has_bclk; }; struct mtk_iommu_domain;