Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752919AbdHKJ5P (ORCPT ); Fri, 11 Aug 2017 05:57:15 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:55717 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752892AbdHKJ5N (ORCPT ); Fri, 11 Aug 2017 05:57:13 -0400 From: Yong Wu To: Joerg Roedel , Rob Herring , Matthias Brugger , Robin Murphy CC: Will Deacon , Daniel Kurtz , Tomasz Figa , Mark Rutland , Catalin Marinas , , , , , , , , , , , Arvind Yadav , , Subject: [PATCH 5/8] iommu/mediatek: Disable iommu clock when system suspend Date: Fri, 11 Aug 2017 17:56:14 +0800 Message-ID: <1502445377-26936-6-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1502445377-26936-1-git-send-email-yong.wu@mediatek.com> References: <1502445377-26936-1-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 List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1553 Lines: 41 When system suspend, infra power domain may be off, and the iommu's clock must be disabled when system off, or the iommu's bclk clock maybe disabled after system resume. Signed-off-by: Honghui Zhang Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index e81ed9a..b7c8e52 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -675,6 +675,7 @@ static int __maybe_unused mtk_iommu_suspend(struct device *dev) reg->ctrl_reg = readl_relaxed(base + REG_MMU_CTRL_REG); reg->int_control0 = readl_relaxed(base + REG_MMU_INT_CONTROL0); reg->int_main_control = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL); + clk_disable_unprepare(data->bclk); return 0; } @@ -684,6 +685,7 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev) struct mtk_iommu_suspend_reg *reg = &data->reg; void __iomem *base = data->base; + clk_prepare_enable(data->bclk); writel_relaxed(reg->standard_axi_mode, base + REG_MMU_STANDARD_AXI_MODE); writel_relaxed(reg->dcm_dis, base + REG_MMU_DCM_DIS); @@ -699,7 +701,7 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev) } static const struct dev_pm_ops mtk_iommu_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(mtk_iommu_suspend, mtk_iommu_resume) + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(mtk_iommu_suspend, mtk_iommu_resume) }; static const struct of_device_id mtk_iommu_of_ids[] = { -- 1.9.1