linux-kernel - [PATCH v2 2/3] iommu/mediatek: add pdata member for legacy ivrp paddr

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Message-Id: <20200302112152.2887131-2-fparent@baylibre.com>
Date:   Mon,  2 Mar 2020 12:21:51 +0100
From:   Fabien Parent <fparent@...libre.com>
To:     linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, iommu@...ts.linux-foundation.org
Cc:     matthias.bgg@...il.com, joro@...tes.org, yong.wu@...iatek.com,
        ck.hu@...iatek.com, Fabien Parent <fparent@...libre.com>
Subject: [PATCH v2 2/3] iommu/mediatek: add pdata member for legacy ivrp paddr

Add a new platform data member in order to select which IVRP_PADDR
format is used by an SoC.

Signed-off-by: Fabien Parent <fparent@...libre.com>
---

v2: new patch

---
 drivers/iommu/mtk_iommu.c | 3 ++-
 drivers/iommu/mtk_iommu.h | 1 +
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 95945f467c03..78cb14ab7dd0 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -569,7 +569,7 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data)
 		F_INT_PRETETCH_TRANSATION_FIFO_FAULT;
 	writel_relaxed(regval, data->base + REG_MMU_INT_MAIN_CONTROL);
 
-	if (data->plat_data->m4u_plat == M4U_MT8173)
+	if (data->plat_data->has_legacy_ivrp_paddr)
 		regval = (data->protect_base >> 1) | (data->enable_4GB << 31);
 	else
 		regval = lower_32_bits(data->protect_base) |
@@ -786,6 +786,7 @@ static const struct mtk_iommu_plat_data mt8173_data = {
 	.m4u_plat     = M4U_MT8173,
 	.has_4gb_mode = true,
 	.has_bclk     = true,
+	.has_legacy_ivrp_paddr = 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 ea949a324e33..4696ba027a71 100644
--- a/drivers/iommu/mtk_iommu.h
+++ b/drivers/iommu/mtk_iommu.h
@@ -42,6 +42,7 @@ struct mtk_iommu_plat_data {
 	bool                has_bclk;
 	bool                has_vld_pa_rng;
 	bool                reset_axi;
+	bool                has_legacy_ivrp_paddr;
 	unsigned char       larbid_remap[MTK_LARB_NR_MAX];
 };
 
-- 
2.25.0