Re: [PATCH v16 5/5] iommu/arm-smmu: Add support for qcom, smmu-v2 variant

qcom,smmu-v2 is an arm,smmu-v2 implementation with specific
clock and power requirements.
On msm8996, multiple cores, viz. mdss, video, etc. use this
smmu. On sdm845, this smmu is used with gpu.
Add bindings for the same.

Signed-off-by: Vivek Gautam <redacted>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Tested-by: Srinivas Kandagatla <redacted>
---
  drivers/iommu/arm-smmu.c | 13 +++++++++++++
  1 file changed, 13 insertions(+)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 166c8c6da24f..411e5ac57c64 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c

@@ -119,6 +119,7 @@ enum arm_smmu_implementation {
  	GENERIC_SMMU,
  	ARM_MMU500,
  	CAVIUM_SMMUV2,
+	QCOM_SMMUV2,

  };
  
  struct arm_smmu_s2cr {

@@ -1970,6 +1971,17 @@ ARM_SMMU_MATCH_DATA(arm_mmu401, ARM_SMMU_V1_64K, GENERIC_SMMU);
  ARM_SMMU_MATCH_DATA(arm_mmu500, ARM_SMMU_V2, ARM_MMU500);
  ARM_SMMU_MATCH_DATA(cavium_smmuv2, ARM_SMMU_V2, CAVIUM_SMMUV2);
  
+static const char * const qcom_smmuv2_clks[] = {
+	"bus", "iface",
+};
+
+static const struct arm_smmu_match_data qcom_smmuv2 = {
+	.version = ARM_SMMU_V2,
+	.model = QCOM_SMMUV2,
+	.clks = qcom_smmuv2_clks,
+	.num_clks = ARRAY_SIZE(qcom_smmuv2_clks),
+};
+
  static const struct of_device_id arm_smmu_of_match[] = {
  	{ .compatible = "arm,smmu-v1", .data = &smmu_generic_v1 },
  	{ .compatible = "arm,smmu-v2", .data = &smmu_generic_v2 },

@@ -1977,6 +1989,7 @@ static const struct of_device_id arm_smmu_of_match[] = {
  	{ .compatible = "arm,mmu-401", .data = &arm_mmu401 },
  	{ .compatible = "arm,mmu-500", .data = &arm_mmu500 },
  	{ .compatible = "cavium,smmu-v2", .data = &cavium_smmuv2 },
+	{ .compatible = "qcom,smmu-v2", .data = &qcom_smmuv2 },
  	{ },
  };
  MODULE_DEVICE_TABLE(of, arm_smmu_of_match);