linux-kernel - [PATCH v4 14/18] iommu/mediatek: Fix VLD_PA

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Date:   Sat, 8 Dec 2018 16:39:27 +0800
From:   Yong Wu <yong.wu@...iatek.com>
To:     Joerg Roedel <joro@...tes.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Robin Murphy <robin.murphy@....com>,
        Rob Herring <robh+dt@...nel.org>
CC:     Tomasz Figa <tfiga@...gle.com>, Will Deacon <will.deacon@....com>,
        <linux-mediatek@...ts.infradead.org>,
        <srv_heupstream@...iatek.com>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>, <arnd@...db.de>,
        <yingjoe.chen@...iatek.com>, <yong.wu@...iatek.com>,
        <youlin.pei@...iatek.com>, Nicolas Boichat <drinkcat@...omium.org>,
        Arvind Yadav <arvind.yadav.cs@...il.com>
Subject: [PATCH v4 14/18] iommu/mediatek: Fix VLD_PA_RANGE register backup when suspend

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@...iatek.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 1a87a1d..c3b4325 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -721,6 +721,7 @@ 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_range = readl_relaxed(base + REG_MMU_VLD_PA_RNG);
 	clk_disable_unprepare(data->bclk);
 	return 0;
 }
@@ -745,6 +746,7 @@ 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_range, 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 6385dec..17996e0 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -33,6 +33,7 @@ struct mtk_iommu_suspend_reg {
 	u32				int_control0;
 	u32				int_main_control;
 	u32				ivrp_paddr;
+	u32				vld_pa_range;
 };
 
 enum mtk_iommu_plat {
-- 
1.9.1