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=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,UNPARSEABLE_RELAY, 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 EDA4BC43613 for ; Tue, 1 Jan 2019 04:52:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B8A0F218A4 for ; Tue, 1 Jan 2019 04:52:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728488AbfAAEw0 (ORCPT ); Mon, 31 Dec 2018 23:52:26 -0500 Received: from mailgw02.mediatek.com ([210.61.82.184]:65431 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1728425AbfAAEwX (ORCPT ); Mon, 31 Dec 2018 23:52:23 -0500 X-UUID: edfd3464949c4a3481c41c86c2fac3ec-20190101 X-UUID: edfd3464949c4a3481c41c86c2fac3ec-20190101 Received: from mtkcas09.mediatek.inc [(172.21.101.178)] by mailgw02.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1286082275; Tue, 01 Jan 2019 12:52:17 +0800 Received: from mtkcas08.mediatek.inc (172.21.101.126) by mtkmbs03n1.mediatek.inc (172.21.101.181) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Tue, 1 Jan 2019 12:52:16 +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; Tue, 1 Jan 2019 12:52:15 +0800 From: Yong Wu To: Joerg Roedel , Greg Kroah-Hartman , Matthias Brugger , Rob Herring CC: Robin Murphy , Tomasz Figa , Will Deacon , , , , , , , , , , , Nicolas Boichat Subject: [PATCH 05/13] memory: mtk-smi: Add device-link between smi-larb and smi-common Date: Tue, 1 Jan 2019 12:51:08 +0800 Message-ID: <1546318276-18993-6-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1546318276-18993-1-git-send-email-yong.wu@mediatek.com> References: <1546318276-18993-1-git-send-email-yong.wu@mediatek.com> MIME-Version: 1.0 Content-Type: text/plain X-MTK: N Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. Since smi is built-in driver like IOMMU and never unbound, DL_FLAG_AUTOREMOVE_* is not needed. CC: Matthias Brugger Suggested-by: Tomasz Figa Signed-off-by: Yong Wu --- drivers/memory/mtk-smi.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c index 9688341..30930e4 100644 --- a/drivers/memory/mtk-smi.c +++ b/drivers/memory/mtk-smi.c @@ -271,6 +271,7 @@ 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) @@ -310,6 +311,12 @@ 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); + 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; @@ -333,17 +340,9 @@ 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_get_sync(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; } @@ -358,7 +357,6 @@ 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; } -- 1.9.1