From: Sricharan R <sricharan@xxxxxxxxxxxxxx> This patch uses IOMMU_OF_DECLARE to register the driver and the iommu_ops. So when master devices of the iommu are registered, of_xlate callback can be used to add the master configurations to the smmu driver. Signed-off-by: Sricharan R <sricharan@xxxxxxxxxxxxxx> Signed-off-by: Anup Patel <anup.patel@xxxxxxxxxxxx> Tested-by: Anup Patel <anup.patel@xxxxxxxxxxxx> --- drivers/iommu/arm-smmu.c | 35 ++++++++++++++++++++++------------- 1 file changed, 22 insertions(+), 13 deletions(-) diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c index bf1895c..2c8f871 100644 --- a/drivers/iommu/arm-smmu.c +++ b/drivers/iommu/arm-smmu.c @@ -39,6 +39,7 @@ #include <linux/module.h> #include <linux/of.h> #include <linux/of_address.h> +#include <linux/of_iommu.h> #include <linux/pci.h> #include <linux/platform_device.h> #include <linux/slab.h> @@ -265,6 +266,8 @@ #define FSYNR0_WNR (1 << 4) static int force_stage; +static bool init_done; + module_param_named(force_stage, force_stage, int, S_IRUGO); MODULE_PARM_DESC(force_stage, "Force SMMU mappings to be installed at a particular stage of translation. A value of '1' or '2' forces the corresponding stage. All other values are ignored (i.e. no stage is forced). Note that selecting a specific stage will disable support for nested translation."); @@ -1926,20 +1929,8 @@ static struct platform_driver arm_smmu_driver = { static int __init arm_smmu_init(void) { - struct device_node *np; int ret; - /* - * Play nice with systems that don't have an ARM SMMU by checking that - * an ARM SMMU exists in the system before proceeding with the driver - * and IOMMU bus operation registration. - */ - np = of_find_matching_node(NULL, arm_smmu_of_match); - if (!np) - return 0; - - of_node_put(np); - ret = platform_driver_register(&arm_smmu_driver); if (ret) return ret; @@ -1958,15 +1949,33 @@ static int __init arm_smmu_init(void) bus_set_iommu(&pci_bus_type, &arm_smmu_ops); #endif + init_done = true; + return 0; } +static int __init arm_smmu_of_setup(struct device_node *np) +{ + + if (!init_done) + arm_smmu_init(); + + of_iommu_set_ops(np, &arm_smmu_ops); + + return 0; +} + +IOMMU_OF_DECLARE(arm_smmu_v1, "arm,smmu-v1", arm_smmu_of_setup); +IOMMU_OF_DECLARE(arm_smmu_v2, "arm,smmu-v2", arm_smmu_of_setup); +IOMMU_OF_DECLARE(arm_smmu_400, "arm,mmu-400", arm_smmu_of_setup); +IOMMU_OF_DECLARE(arm_smmu_401, "arm,mmu-401", arm_smmu_of_setup); +IOMMU_OF_DECLARE(arm_smmu_500, "arm,mmu-500", arm_smmu_of_setup); + static void __exit arm_smmu_exit(void) { return platform_driver_unregister(&arm_smmu_driver); } -subsys_initcall(arm_smmu_init); module_exit(arm_smmu_exit); MODULE_DESCRIPTION("IOMMU API for ARM architected SMMU implementations"); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html