diff options
Diffstat (limited to 'drivers/iommu/omap-iommu.c')
| -rw-r--r-- | drivers/iommu/omap-iommu.c | 42 |
1 files changed, 38 insertions, 4 deletions
diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index 217952b993e1..eb73ef2b6fa9 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -23,6 +23,9 @@ #include <linux/spinlock.h> #include <linux/io.h> #include <linux/pm_runtime.h> +#include <linux/of.h> +#include <linux/of_iommu.h> +#include <linux/of_irq.h> #include <asm/cacheflush.h> @@ -936,17 +939,39 @@ static int omap_iommu_probe(struct platform_device *pdev) struct omap_iommu *obj; struct resource *res; struct iommu_platform_data *pdata = pdev->dev.platform_data; + struct device_node *of = pdev->dev.of_node; obj = devm_kzalloc(&pdev->dev, sizeof(*obj) + MMU_REG_SIZE, GFP_KERNEL); if (!obj) return -ENOMEM; - obj->nr_tlb_entries = pdata->nr_tlb_entries; - obj->name = pdata->name; + if (of) { + obj->name = dev_name(&pdev->dev); + obj->nr_tlb_entries = 32; + err = of_property_read_u32(of, "ti,#tlb-entries", + &obj->nr_tlb_entries); + if (err && err != -EINVAL) + return err; + if (obj->nr_tlb_entries != 32 && obj->nr_tlb_entries != 8) + return -EINVAL; + /* + * da_start and da_end are needed for omap-iovmm, so hardcode + * these values as used by OMAP3 ISP - the only user for + * omap-iovmm + */ + obj->da_start = 0; + obj->da_end = 0xfffff000; + } else { + obj->nr_tlb_entries = pdata->nr_tlb_entries; + obj->name = pdata->name; + obj->da_start = pdata->da_start; + obj->da_end = pdata->da_end; + } + if (obj->da_end <= obj->da_start) + return -EINVAL; + obj->dev = &pdev->dev; obj->ctx = (void *)obj + sizeof(*obj); - obj->da_start = pdata->da_start; - obj->da_end = pdata->da_end; spin_lock_init(&obj->iommu_lock); mutex_init(&obj->mmap_lock); @@ -987,11 +1012,20 @@ static int omap_iommu_remove(struct platform_device *pdev) return 0; } +static struct of_device_id omap_iommu_of_match[] = { + { .compatible = "ti,omap2-iommu" }, + { .compatible = "ti,omap4-iommu" }, + { .compatible = "ti,dra7-iommu" }, + {}, +}; +MODULE_DEVICE_TABLE(of, omap_iommu_of_match); + static struct platform_driver omap_iommu_driver = { .probe = omap_iommu_probe, .remove = omap_iommu_remove, .driver = { .name = "omap-iommu", + .of_match_table = of_match_ptr(omap_iommu_of_match), }, }; |