[PATCH v2 3/4] iommu/mediatek: Use writel for TLB range invalidation

[Yong Wu]

Use writel for the register F_MMU_INV_RANGE which is for triggering the
HW work. We expect all the setting(iova_start/iova_end...) have already
been finished before F_MMU_INV_RANGE.

Signed-off-by: Anan.Sun <anan.sun@xxxxxxxxxxxx>
Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx>
---
This is a improvement rather than fixing a issue.
---
 drivers/iommu/mtk_iommu.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
index 24a13a6..607f92c 100644
--- a/drivers/iommu/mtk_iommu.c
+++ b/drivers/iommu/mtk_iommu.c
@@ -187,8 +187,7 @@ static void mtk_iommu_tlb_add_flush(unsigned long iova, size_t size,
 		writel_relaxed(iova, data->base + REG_MMU_INVLD_START_A);
 		writel_relaxed(iova + size - 1,
 			       data->base + REG_MMU_INVLD_END_A);
-		writel_relaxed(F_MMU_INV_RANGE,
-			       data->base + REG_MMU_INVALIDATE);
+		writel(F_MMU_INV_RANGE, data->base + REG_MMU_INVALIDATE);
 
 		/*
 		 * There is no tlb flush queue in the HW, the HW always expect
-- 
1.9.1