[PATCH v7 10/21] iommu/mediatek: Move reset_axi into plat_data

Yong Wu yong.wu at mediatek.com
Mon Jun 10 05:17:49 PDT 2019


In mt8173 and mt8183, 0x48 is REG_MMU_STANDARD_AXI_MODE while it is
REG_MMU_CTRL in the other SoCs, and the bits meaning is completely
different with the REG_MMU_STANDARD_AXI_MODE.

This patch moves this property to plat_data, it's also a preparing
patch for mt8183.

Signed-off-by: Yong Wu <yong.wu at mediatek.com>
Reviewed-by: Nicolas Boichat <drinkcat at chromium.org>
Reviewed-by: Evan Green <evgreen at chromium.org>
---
 drivers/iommu/mtk_iommu.c | 4 ++--
 drivers/iommu/mtk_iommu.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index d38dfa2..8ac7034 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -557,8 +557,7 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
 	}
 	writel_relaxed(0, data->base + REG_MMU_DCM_DIS);
 
-	/* It's MISC control register whose default value is ok except mt8173.*/
-	if (data->plat_data->m4u_plat == M4U_MT8173)
+	if (data->plat_data->reset_axi)
 		writel_relaxed(0, data->base + REG_MMU_STANDARD_AXI_MODE);
 
 	if (devm_request_irq(data->dev, data->irq, mtk_iommu_isr, 0,
@@ -752,6 +751,7 @@ static int __maybe_unused mtk_iommu_resume(struct device *dev)
 	.m4u_plat     = M4U_MT8173,
 	.has_4gb_mode = true,
 	.has_bclk     = true,
+	.reset_axi    = true,
 	.larbid_remap = {0, 1, 2, 3, 4, 5}, /* Linear mapping. */
 };
 
diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h
index 61fd5d6..55d73c1 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -46,7 +46,7 @@ struct mtk_iommu_plat_data {
 
 	/* HW will use the EMI clock if there isn't the "bclk". */
 	bool                has_bclk;
-
+	bool                reset_axi;
 	unsigned char       larbid_remap[MTK_LARB_NR_MAX];
 };
 
-- 
1.9.1




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