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=-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,UNPARSEABLE_RELAY,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 C6EBAC433B4 for ; Sat, 10 Apr 2021 09:17:42 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (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 81B1C61165 for ; Sat, 10 Apr 2021 09:17:42 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 81B1C61165 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 508AF4016C; Sat, 10 Apr 2021 09:17:42 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id n3krUKMXnLYa; Sat, 10 Apr 2021 09:17:41 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [IPv6:2605:bc80:3010:104::8cd3:938]) by smtp2.osuosl.org (Postfix) with ESMTP id 310AD4012D; Sat, 10 Apr 2021 09:17:41 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 1896BC000B; Sat, 10 Apr 2021 09:17:41 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 9E322C000A for ; Sat, 10 Apr 2021 09:17:39 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id 89DCC4016C for ; Sat, 10 Apr 2021 09:17:39 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id uOVqPpSE4izO for ; Sat, 10 Apr 2021 09:17:39 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.8.0 Received: from mailgw01.mediatek.com (unknown [210.61.82.183]) by smtp2.osuosl.org (Postfix) with ESMTP id 9D39F4012D for ; Sat, 10 Apr 2021 09:17:38 +0000 (UTC) X-UUID: f7066cfd7d7f4d3c834fb3165c9e3c13-20210410 X-UUID: f7066cfd7d7f4d3c834fb3165c9e3c13-20210410 Received: from mtkcas06.mediatek.inc [(172.21.101.30)] by mailgw01.mediatek.com (envelope-from ) (Cellopoint E-mail Firewall v4.1.14 Build 0819 with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 1025467400; Sat, 10 Apr 2021 17:12:33 +0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs07n2.mediatek.inc (172.21.101.141) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sat, 10 Apr 2021 17:12:31 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Sat, 10 Apr 2021 17:12:30 +0800 From: Yong Wu To: Matthias Brugger , Joerg Roedel , Rob Herring , Krzysztof Kozlowski Subject: [PATCH v5 04/16] memory: mtk-smi: Add device-link between smi-larb and smi-common Date: Sat, 10 Apr 2021 17:11:16 +0800 Message-ID: <20210410091128.31823-5-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210410091128.31823-1-yong.wu@mediatek.com> References: <20210410091128.31823-1-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org, yi.kuo@mediatek.com, Nicolas Boichat , acourbot@chromium.org, srv_heupstream@mediatek.com, eizan@chromium.org, Will Deacon , linux-kernel@vger.kernel.org, Evan Green , chao.hao@mediatek.com, iommu@lists.linux-foundation.org, Matthias Kaehlcke , linux-mediatek@lists.infradead.org, ming-fan.chen@mediatek.com, anan.sun@mediatek.com, Robin Murphy , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Normally, If the smi-larb HW need work, we should enable the smi-common HW power and clock firstly. This patch adds device-link between the smi-larb dev and the smi-common dev. then If pm_runtime_get_sync(smi-larb-dev), the pm_runtime_get_sync (smi-common-dev) will be called automatically. Also, Add DL_FLAG_STATELESS to avoid the smi-common clocks be gated when probe. CC: Matthias Brugger Suggested-by: Tomasz Figa Signed-off-by: Yong Wu --- drivers/memory/mtk-smi.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c index b396253fcf4b..c5fb51f73b34 100644 --- a/drivers/memory/mtk-smi.c +++ b/drivers/memory/mtk-smi.c @@ -319,6 +319,7 @@ static int mtk_smi_larb_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *smi_node; struct platform_device *smi_pdev; + struct device_link *link; larb = devm_kzalloc(dev, sizeof(*larb), GFP_KERNEL); if (!larb) @@ -358,6 +359,12 @@ static int mtk_smi_larb_probe(struct platform_device *pdev) if (!platform_get_drvdata(smi_pdev)) return -EPROBE_DEFER; larb->smi_common_dev = &smi_pdev->dev; + link = device_link_add(dev, larb->smi_common_dev, + DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS); + if (!link) { + dev_err(dev, "Unable to link smi-common dev\n"); + return -ENODEV; + } } else { dev_err(dev, "Failed to get the smi_common device\n"); return -EINVAL; @@ -370,6 +377,9 @@ static int mtk_smi_larb_probe(struct platform_device *pdev) static int mtk_smi_larb_remove(struct platform_device *pdev) { + struct mtk_smi_larb *larb = platform_get_drvdata(pdev); + + device_link_remove(&pdev->dev, larb->smi_common_dev); pm_runtime_disable(&pdev->dev); component_del(&pdev->dev, &mtk_smi_larb_component_ops); return 0; @@ -381,17 +391,9 @@ static int __maybe_unused mtk_smi_larb_resume(struct device *dev) const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen; int ret; - /* Power on smi-common. */ - ret = pm_runtime_resume_and_get(larb->smi_common_dev); - if (ret < 0) { - dev_err(dev, "Failed to pm get for smi-common(%d).\n", ret); - return ret; - } - ret = mtk_smi_clk_enable(&larb->smi); if (ret < 0) { dev_err(dev, "Failed to enable clock(%d).\n", ret); - pm_runtime_put_sync(larb->smi_common_dev); return ret; } @@ -406,7 +408,6 @@ static int __maybe_unused mtk_smi_larb_suspend(struct device *dev) struct mtk_smi_larb *larb = dev_get_drvdata(dev); mtk_smi_clk_disable(&larb->smi); - pm_runtime_put_sync(larb->smi_common_dev); return 0; } -- 2.18.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu