[PATCH 2/5] iommu/tegra-smmu: Use non-secure register for flushing

[Navneet Kumar <navneetk-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>]

Use PTB_ASID instead of SMMU_CONFIG to flush smmu.
PTB_ASID can be accessed from non-secure mode, SMMU_CONFIG cannot be.
Using SMMU_CONFIG could pose a problem when kernel doesn't have secure
mode access enabled from boot.

Signed-off-by: Navneet Kumar <navneetk-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
---
 drivers/iommu/tegra-smmu.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c
index ee4d8a8..fa175d9 100644
--- a/drivers/iommu/tegra-smmu.c
+++ b/drivers/iommu/tegra-smmu.c
@@ -235,7 +235,7 @@ static inline void smmu_flush_tlb_group(struct tegra_smmu *smmu,
 
 static inline void smmu_flush(struct tegra_smmu *smmu)
 {
-	smmu_readl(smmu, SMMU_CONFIG);
+	smmu_readl(smmu, SMMU_PTB_ASID);
 }
 
 static int tegra_smmu_alloc_asid(struct tegra_smmu *smmu, unsigned int *idp)
-- 
2.7.4