diff options
| -rw-r--r-- | drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c index 322abd6be8dc..504d7880ce5a 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c @@ -4533,6 +4533,35 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu) return 0; } +#ifdef CONFIG_TEGRA241_CMDQV +static void tegra_cmdqv_dt_probe(struct device_node *smmu_node, + struct arm_smmu_device *smmu) +{ + struct platform_device *pdev; + struct device_node *np; + + np = of_parse_phandle(smmu_node, "nvidia,cmdqv", 0); + if (!np) + return; + + /* Tegra241 CMDQV driver is responsible for put_device() */ + pdev = of_find_device_by_node(np); + of_node_put(np); + if (!pdev) + return; + + smmu->impl_dev = &pdev->dev; + smmu->options |= ARM_SMMU_OPT_TEGRA241_CMDQV; + dev_dbg(smmu->dev, "found companion CMDQV device: %s\n", + dev_name(smmu->impl_dev)); +} +#else +static void tegra_cmdqv_dt_probe(struct device_node *smmu_node, + struct arm_smmu_device *smmu) +{ +} +#endif + #ifdef CONFIG_ACPI #ifdef CONFIG_TEGRA241_CMDQV static void acpi_smmu_dsdt_probe_tegra241_cmdqv(struct acpi_iort_node *node, @@ -4638,6 +4667,9 @@ static int arm_smmu_device_dt_probe(struct platform_device *pdev, if (of_dma_is_coherent(dev->of_node)) smmu->features |= ARM_SMMU_FEAT_COHERENCY; + if (of_device_is_compatible(dev->of_node, "nvidia,tegra264-smmu")) + tegra_cmdqv_dt_probe(dev->of_node, smmu); + return ret; } |