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From:   Yong Wu <yong.wu@mediatek.com>
To:     Joerg Roedel <joro@8bytes.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Robin Murphy <robin.murphy@arm.com>,
        Will Deacon <will@kernel.org>
CC:     Rob Herring <robh+dt@kernel.org>,
        Evan Green <evgreen@chromium.org>,
        Tomasz Figa <tfiga@google.com>,
        <linux-mediatek@lists.infradead.org>,
        <srv_heupstream@mediatek.com>, <devicetree@vger.kernel.org>,
        <linux-kernel@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <iommu@lists.linux-foundation.org>, <yong.wu@mediatek.com>,
        <youlin.pei@mediatek.com>, Nicolas Boichat <drinkcat@chromium.org>,
        <anan.sun@mediatek.com>, Matthias Kaehlcke <mka@chromium.org>,
        <cui.zhang@mediatek.com>, <chao.hao@mediatek.com>,
        <ming-fan.chen@mediatek.com>
Subject: [PATCH v11 21/23] iommu/mediatek: Fix VLD_PA_RNG register backup when suspend
Date:   Sat, 24 Aug 2019 11:02:06 +0800
Message-ID: <1566615728-26388-22-git-send-email-yong.wu@mediatek.com>
In-Reply-To: <1566615728-26388-1-git-send-email-yong.wu@mediatek.com>
References: <1566615728-26388-1-git-send-email-yong.wu@mediatek.com>
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Sender: linux-kernel-owner@vger.kernel.org
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The register VLD_PA_RNG(0x118) was forgot to backup while adding 4GB
mode support for mt2712. this patch add it.

Fixes: 30e2fccf9512 ("iommu/mediatek: Enlarge the validate PA range
for 4GB mode")
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
---
 drivers/iommu/mtk_iommu.c | 2 ++
 drivers/iommu/mtk_iommu.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 470de8b..5d5341c 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -742,6 +742,7 @@ static int __maybe_unused mtk_iommu_suspend(struct device *dev)
 	reg->int_control0 = readl_relaxed(base + REG_MMU_INT_CONTROL0);
 	reg->int_main_control = readl_relaxed(base + REG_MMU_INT_MAIN_CONTROL);
 	reg->ivrp_paddr = readl_relaxed(base + REG_MMU_IVRP_PADDR);
+	reg->vld_pa_rng = readl_relaxed(base + REG_MMU_VLD_PA_RNG);
 	clk_disable_unprepare(data->bclk);
 	return 0;
 }
@@ -766,6 +767,7 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev)
 	writel_relaxed(reg->int_control0, base + REG_MMU_INT_CONTROL0);
 	writel_relaxed(reg->int_main_control, base + REG_MMU_INT_MAIN_CONTROL);
 	writel_relaxed(reg->ivrp_paddr, base + REG_MMU_IVRP_PADDR);
+	writel_relaxed(reg->vld_pa_rng, base + REG_MMU_VLD_PA_RNG);
 	if (m4u_dom)
 		writel(m4u_dom->cfg.arm_v7s_cfg.ttbr[0] & MMU_PT_ADDR_MASK,
 		       base + REG_MMU_PT_BASE_ADDR);
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index 6b1f833..56b579c 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -24,6 +24,7 @@ struct mtk_iommu_suspend_reg {
 	u32				int_control0;
 	u32				int_main_control;
 	u32				ivrp_paddr;
+	u32				vld_pa_rng;
 };
 
 enum mtk_iommu_plat {
-- 
1.9.1