[PATCH 2/2] iommu: Clean up of_iommu_init_fn

[Robin Murphy]

Now that no more drivers rely on arbitrary early initialisation via an
of_iommu_init_fn hook, let's clean up the redundant remnants. The
IOMMU_OF_DECLARE() macro needs to remain for now, as the probe-deferral
mechanism has no other nice way to detect built-in drivers before they
have registered themselves, such that it can make the right decision.

Signed-off-by: Robin Murphy <robin.murphy at arm.com>
---
 drivers/iommu/arm-smmu-v3.c  |  2 +-
 drivers/iommu/arm-smmu.c     | 12 ++++++------
 drivers/iommu/exynos-iommu.c |  2 +-
 drivers/iommu/msm_iommu.c    |  2 +-
 drivers/iommu/of_iommu.c     | 16 ----------------
 drivers/iommu/qcom_iommu.c   |  2 +-
 include/linux/of_iommu.h     |  5 +----
 7 files changed, 11 insertions(+), 30 deletions(-)

diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 57c92aa3122e..1abbf42a8bd5 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -3009,7 +3009,7 @@ static struct platform_driver arm_smmu_driver = {
 };
 module_platform_driver(arm_smmu_driver);
 
-IOMMU_OF_DECLARE(arm_smmuv3, "arm,smmu-v3", NULL);
+IOMMU_OF_DECLARE(arm_smmuv3, "arm,smmu-v3");
 
 MODULE_DESCRIPTION("IOMMU API for ARM architected SMMUv3 implementations");
 MODULE_AUTHOR("Will Deacon <will.deacon at arm.com>");
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 3bdb799d3b4b..56147a2be3d0 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -2208,12 +2208,12 @@ static struct platform_driver arm_smmu_driver = {
 };
 module_platform_driver(arm_smmu_driver);
 
-IOMMU_OF_DECLARE(arm_smmuv1, "arm,smmu-v1", NULL);
-IOMMU_OF_DECLARE(arm_smmuv2, "arm,smmu-v2", NULL);
-IOMMU_OF_DECLARE(arm_mmu400, "arm,mmu-400", NULL);
-IOMMU_OF_DECLARE(arm_mmu401, "arm,mmu-401", NULL);
-IOMMU_OF_DECLARE(arm_mmu500, "arm,mmu-500", NULL);
-IOMMU_OF_DECLARE(cavium_smmuv2, "cavium,smmu-v2", NULL);
+IOMMU_OF_DECLARE(arm_smmuv1, "arm,smmu-v1");
+IOMMU_OF_DECLARE(arm_smmuv2, "arm,smmu-v2");
+IOMMU_OF_DECLARE(arm_mmu400, "arm,mmu-400");
+IOMMU_OF_DECLARE(arm_mmu401, "arm,mmu-401");
+IOMMU_OF_DECLARE(arm_mmu500, "arm,mmu-500");
+IOMMU_OF_DECLARE(cavium_smmuv2, "cavium,smmu-v2");
 
 MODULE_DESCRIPTION("IOMMU API for ARM architected SMMU implementations");
 MODULE_AUTHOR("Will Deacon <will.deacon at arm.com>");
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index f596fcc32898..6a96a4c42153 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -1385,4 +1385,4 @@ static int __init exynos_iommu_init(void)
 }
 core_initcall(exynos_iommu_init);
 
-IOMMU_OF_DECLARE(exynos_iommu_of, "samsung,exynos-sysmmu", NULL);
+IOMMU_OF_DECLARE(exynos_iommu_of, "samsung,exynos-sysmmu");
diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c
index dda1ce87a070..0d3350463a3f 100644
--- a/drivers/iommu/msm_iommu.c
+++ b/drivers/iommu/msm_iommu.c
@@ -877,7 +877,7 @@ static void __exit msm_iommu_driver_exit(void)
 subsys_initcall(msm_iommu_driver_init);
 module_exit(msm_iommu_driver_exit);
 
-IOMMU_OF_DECLARE(msm_iommu_of, "qcom,apq8064-iommu", NULL);
+IOMMU_OF_DECLARE(msm_iommu_of, "qcom,apq8064-iommu");
 
 MODULE_LICENSE("GPL v2");
 MODULE_AUTHOR("Stepan Moskovchenko <stepanm at codeaurora.org>");
diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c
index 50947ebb6d17..5c36a8b7656a 100644
--- a/drivers/iommu/of_iommu.c
+++ b/drivers/iommu/of_iommu.c
@@ -231,19 +231,3 @@ const struct iommu_ops *of_iommu_configure(struct device *dev,
 
 	return ops;
 }
-
-static int __init of_iommu_init(void)
-{
-	struct device_node *np;
-	const struct of_device_id *match, *matches = &__iommu_of_table;
-
-	for_each_matching_node_and_match(np, matches, &match) {
-		const of_iommu_init_fn init_fn = match->data;
-
-		if (init_fn && init_fn(np))
-			pr_err("Failed to initialise IOMMU %pOF\n", np);
-	}
-
-	return 0;
-}
-postcore_initcall_sync(of_iommu_init);
diff --git a/drivers/iommu/qcom_iommu.c b/drivers/iommu/qcom_iommu.c
index c8a587d034b0..37ecc49deab8 100644
--- a/drivers/iommu/qcom_iommu.c
+++ b/drivers/iommu/qcom_iommu.c
@@ -924,7 +924,7 @@ static void __exit qcom_iommu_exit(void)
 module_init(qcom_iommu_init);
 module_exit(qcom_iommu_exit);
 
-IOMMU_OF_DECLARE(qcom_iommu_dev, "qcom,msm-iommu-v1", NULL);
+IOMMU_OF_DECLARE(qcom_iommu_dev, "qcom,msm-iommu-v1");
 
 MODULE_DESCRIPTION("IOMMU API for QCOM IOMMU v1 implementations");
 MODULE_LICENSE("GPL v2");
diff --git a/include/linux/of_iommu.h b/include/linux/of_iommu.h
index 13394ac83c66..0cac59db95bc 100644
--- a/include/linux/of_iommu.h
+++ b/include/linux/of_iommu.h
@@ -33,9 +33,6 @@ static inline const struct iommu_ops *of_iommu_configure(struct device *dev,
 
 extern struct of_device_id __iommu_of_table;
 
-typedef int (*of_iommu_init_fn)(struct device_node *);
-
-#define IOMMU_OF_DECLARE(name, compat, fn) \
-	_OF_DECLARE(iommu, name, compat, fn, of_iommu_init_fn)
+#define IOMMU_OF_DECLARE(name, compat)	OF_DECLARE_1(iommu, name, compat, NULL)
 
 #endif /* __OF_IOMMU_H */
-- 
2.13.4.dirty