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From: Anup Patel <anup.patel@broadcom.com>
To: Catalin Marinas <catalin.marinas@arm.com>, Joerg Roedel <joro@8bytes.org>,
        Will Deacon <will.deacon@arm.com>, Robin Murphy <Robin.Murphy@arm.com>,
        Sricharan R <sricharan@codeaurora.org>,
        Linux IOMMU <iommu@lists.linux-foundation.org>,
        Linux ARM Kernel <linux-arm-kernel@lists.infradead.org>
CC: Rob Herring <robh+dt@kernel.org>, Pawel Moll <pawel.moll@arm.com>,
        "Mark Rutland" <mark.rutland@arm.com>,
        Ian Campbell <ijc+devicetree@hellion.org.uk>,
        Kumar Gala <galak@codeaurora.org>,
        "Device Tree" <devicetree@vger.kernel.org>,
        Ray Jui <rjui@broadcom.com>, Scott Branden <sbranden@broadcom.com>,
        Vikram Prakash <vikramp@broadcom.com>,
        "Linux Kernel" <linux-kernel@vger.kernel.org>,
        BCM Kernel Feedback <bcm-kernel-feedback-list@broadcom.com>,
        Anup Patel <anup.patel@broadcom.com>
Subject: [RFC PATCH 2/6] iommu/arm-smmu: Invoke DT probe from arm_smmu_of_setup()
Date: Wed, 27 Jan 2016 10:51:15 +0530
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The SMMUv1/SMMUv2 driver is initialized very early using the
IOMMU_OF_DECLARE() but the actual platform device is probed
via normal DT probing.

This patch uses of_platform_device_create() from arm_smmu_of_setup()
to ensure that SMMU platform device is probed immediately.

Signed-off-by: Anup Patel <anup.patel@broadcom.com>
---
 drivers/iommu/arm-smmu.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 22b9668..9bdf6b2 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -39,6 +39,7 @@
 #include <linux/of.h>
 #include <linux/of_address.h>
 #include <linux/of_iommu.h>
+#include <linux/of_platform.h>
 #include <linux/pci.h>
 #include <linux/platform_device.h>
 #include <linux/slab.h>
@@ -1915,10 +1916,15 @@ static int __init arm_smmu_init(void)
 
 static int __init arm_smmu_of_setup(struct device_node *np)
 {
+	struct platform_device *pdev;
 
 	if (!init_done)
 		arm_smmu_init();
 
+	pdev = of_platform_device_create(np, NULL, NULL);
+	if (IS_ERR(pdev))
+		return PTR_ERR(pdev);
+
 	of_iommu_set_ops(np, &arm_smmu_ops);
 
 	return 0;
-- 
1.9.1