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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 60C2CC433FF for ; Sat, 10 Aug 2019 08:01:41 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 3496F217D7 for ; Sat, 10 Aug 2019 08:01:41 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="lB5Zv4PJ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3496F217D7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-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=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=j7KqzBYPWYU+0Z6lTNtBada37NlVmDRJQwtUwTy/vHY=; b=lB5Zv4PJELlh2M 348JhapmK0ThhInBeCQZMB85cHvPwIvyNrJD9R3o3NhQxnoen1C7hpLN8g/wAOeAIOU+lgE64dxhO shF751pnNlCUdMkOZ9VHKneJK0ZRYldj2pq4XMBjoO2Z7hQJlCqHE1TfwaUr2fr2WGdc4t2oJ6Mex BoPbP51elYJMNUXd1bnHcgxzs//SjZt2BHBhNIFgytXAlghkDoDYSnAU9SsQl2tBB0KKsAv7uwNG2 F8LIssAb4MD2f9cAqzo7YQV1vB9j1ZsnDVldFHGLvr8HrXmuo6nh1QpOB0yYQoDcgXOE8f7VRQpY/ 6B08mK37XbxroW2EIRyg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hwMJo-000763-KD; Sat, 10 Aug 2019 08:01:40 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hwMJA-0006Wk-8w; Sat, 10 Aug 2019 08:01:02 +0000 X-UUID: 85e7adb327094ba0938b8ec44fdd5c47-20190810 X-UUID: 85e7adb327094ba0938b8ec44fdd5c47-20190810 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 1167715306; Sat, 10 Aug 2019 00:00:20 -0800 Received: from mtkmbs07n1.mediatek.inc (172.21.101.16) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Sat, 10 Aug 2019 01:00:19 -0700 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs07n1.mediatek.inc (172.21.101.16) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Sat, 10 Aug 2019 16:00:18 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas08.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Sat, 10 Aug 2019 16:00:16 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Robin Murphy , Will Deacon Subject: [PATCH v9 09/21] iommu/mediatek: Add bclk can be supported optionally Date: Sat, 10 Aug 2019 15:58:09 +0800 Message-ID: <1565423901-17008-10-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1565423901-17008-1-git-send-email-yong.wu@mediatek.com> References: <1565423901-17008-1-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-20190810_010100_978966_85284BD9 X-CRM114-Status: GOOD ( 12.34 ) 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: youlin.pei@mediatek.com, devicetree@vger.kernel.org, Nicolas Boichat , cui.zhang@mediatek.com, srv_heupstream@mediatek.com, chao.hao@mediatek.com, linux-kernel@vger.kernel.org, Evan Green , Tomasz Figa , iommu@lists.linux-foundation.org, Rob Herring , linux-mediatek@lists.infradead.org, yong.wu@mediatek.com, ming-fan.chen@mediatek.com, anan.sun@mediatek.com, Matthias Kaehlcke , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org In some SoCs, M4U doesn't have its "bclk", it will use the EMI clock instead which has always been enabled when entering kernel. Currently mt2712 and mt8173 have this bclk while mt8183 doesn't. This also is a preparing patch for mt8183. Signed-off-by: Yong Wu Reviewed-by: Evan Green Reviewed-by: Matthias Brugger --- 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 1a37db0..3f92d27 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -606,9 +606,11 @@ 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 c281c01..821172b 100644 --- a/drivers/iommu/mtk_iommu.h +++ b/drivers/iommu/mtk_iommu.h @@ -35,6 +35,9 @@ 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; -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel