iommu/rockchip: add multi irq support

there are two irq in vpu_mmu on 3368 platform.

Change-Id: I81d869c1ee536e31334a401a2ddb0e7f2226d4b2
Signed-off-by: Jung Zhao <jung.zhao@rock-chips.com>

diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 60c96b5702579dd76fbceaf9fd59f01d621d2d9e..82ba73d74567b5a22a38b8711f956d80b19b7c81 100644 (file)
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -91,7 +91,8 @@ struct rk_iommu {
        struct device *dev;
        void __iomem **bases;
        int num_mmu;
-       int irq;
+       int *irq;
+       int num_irq;
        bool reset_disabled; /* isp iommu reset operation would failed */
        struct list_head node; /* entry in rk_iommu_domain.iommus */
        struct iommu_domain *domain; /* domain to which iommu is attached */
@@ -863,10 +864,12 @@ static int rk_iommu_attach_device(struct iommu_domain *domain,
 
        iommu->domain = domain;
 
-       ret = devm_request_irq(iommu->dev, iommu->irq, rk_iommu_irq,
+       for (i = 0; i < iommu->num_irq; i++) {
+               ret = devm_request_irq(iommu->dev, iommu->irq[i], rk_iommu_irq,
                               IRQF_SHARED, dev_name(dev), iommu);
-       if (ret)
-               return ret;
+               if (ret)
+                       return ret;
+       }
 
        for (i = 0; i < iommu->num_mmu; i++) {
                rk_iommu_write(iommu->bases[i], RK_MMU_DTE_ADDR,
@@ -915,7 +918,9 @@ static void rk_iommu_detach_device(struct iommu_domain *domain,
        }
        rk_iommu_disable_stall(iommu);
 
-       devm_free_irq(iommu->dev, iommu->irq, iommu);
+       for (i = 0; i < iommu->num_irq; i++) {
+               devm_free_irq(iommu->dev, iommu->irq[i], iommu);
+       }
 
        iommu->domain = NULL;
 
@@ -1185,10 +1190,20 @@ static int rk_iommu_probe(struct platform_device *pdev)
        if (iommu->num_mmu == 0)
                return PTR_ERR(iommu->bases[0]);
 
-       iommu->irq = platform_get_irq(pdev, 0);
-       if (iommu->irq < 0) {
-               dev_err(dev, "Failed to get IRQ, %d\n", iommu->irq);
-               return -ENXIO;
+       while (platform_get_irq(pdev, iommu->num_irq) >= 0)
+               iommu->num_irq++;
+
+       iommu->irq = devm_kzalloc(dev, sizeof(*iommu->irq) * iommu->num_irq,
+                                 GFP_KERNEL);
+       if (!iommu->irq)
+               return -ENOMEM;
+
+       for (i = 0; i < iommu->num_irq; i++) {
+               iommu->irq[i] = platform_get_irq(pdev, i);
+               if (iommu->irq[i] < 0) {
+                       dev_err(dev, "Failed to get IRQ, %d\n", iommu->irq[i]);
+                       return -ENXIO;
+               }
        }
 
        iommu->reset_disabled = device_property_read_bool(dev,