linux-kernel - [Patch v1] iommu: arm-smmu: Use arm-smmu-nvidia impl for Tegra234

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Message-ID: <20220329044436.27732-1-amhetre@nvidia.com>
Date:   Tue, 29 Mar 2022 10:14:36 +0530
From:   Ashish Mhetre <amhetre@...dia.com>
To:     <thierry.reding@...il.com>, <jonathanh@...dia.com>,
        <vdumpa@...dia.com>, <will@...nel.org>, <robin.murphy@....com>,
        <joro@...tes.org>, <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>, <linux-kernel@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>
CC:     <Snikam@...dia.com>, <mperttunen@...dia.com>,
        Ashish Mhetre <amhetre@...dia.com>
Subject: [Patch v1] iommu: arm-smmu: Use arm-smmu-nvidia impl for Tegra234

Tegra234 has 2 pairs of ARM MMU-500 instances. Each pair is used
together and should be programmed identically.
Add compatible string of Tegra234 iommu nodes in arm_smmu_impl_init()
so that arm-smmu-nvidia implementation will be used for programming
these SMMU instances.

Signed-off-by: Ashish Mhetre <amhetre@...dia.com>
---
 drivers/iommu/arm/arm-smmu/arm-smmu-impl.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c b/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
index 2c25cce38060..658f3cc83278 100644
--- a/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
+++ b/drivers/iommu/arm/arm-smmu/arm-smmu-impl.c
@@ -211,7 +211,8 @@ struct arm_smmu_device *arm_smmu_impl_init(struct arm_smmu_device *smmu)
 	if (of_property_read_bool(np, "calxeda,smmu-secure-config-access"))
 		smmu->impl = &calxeda_impl;
 
-	if (of_device_is_compatible(np, "nvidia,tegra194-smmu") ||
+	if (of_device_is_compatible(np, "nvidia,tegra234-smmu") ||
+	    of_device_is_compatible(np, "nvidia,tegra194-smmu") ||
 	    of_device_is_compatible(np, "nvidia,tegra186-smmu"))
 		return nvidia_smmu_impl_init(smmu);
 
-- 
2.17.1