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iommu/exynos: Init from dt-specific callback instead of initcall 

This patch introduces IOMMU_OF_DECLARE-based initialization to the
driver, which replaces subsys_initcall-based procedure.
exynos_iommu_of_setup ensures that each sysmmu controller is probed
before its master device.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Marek Szyprowski 2015-05-19 15:20:36 +02:00 committed by Joerg Roedel
parent 622015e407
commit 8ed55c812f
1 changed files with 28 additions and 9 deletions
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37
drivers/iommu/exynos-iommu.c
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@ -13,16 +13,21 @@
#endif
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>
#include <linux/io.h>
#include <linux/iommu.h>
#include <linux/interrupt.h>
#include <linux/list.h>
#include <linux/of.h>
#include <linux/of_iommu.h>
#include <linux/of_platform.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/slab.h>
#include <asm/cacheflush.h>
#include <asm/dma-iommu.h>
#include <asm/pgtable.h>
typedef u32 sysmmu_iova_t;
@ -1141,7 +1146,7 @@ static void exynos_iommu_remove_device(struct device *dev)
iommu_group_remove_device(dev);
}
static const struct iommu_ops exynos_iommu_ops = {
static struct iommu_ops exynos_iommu_ops = {
.domain_alloc = exynos_iommu_domain_alloc,
.domain_free = exynos_iommu_domain_free,
.attach_dev = exynos_iommu_attach_device,
@ -1155,17 +1160,12 @@ static const struct iommu_ops exynos_iommu_ops = {
.pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE,
};
static bool init_done;
static int __init exynos_iommu_init(void)
{
struct device_node *np;
int ret;
np = of_find_matching_node(NULL, sysmmu_of_match);
if (!np)
return 0;
of_node_put(np);
lv2table_kmem_cache = kmem_cache_create("exynos-iommu-lv2table",
LV2TABLE_SIZE, LV2TABLE_SIZE, 0, NULL);
if (!lv2table_kmem_cache) {
@ -1194,6 +1194,8 @@ static int __init exynos_iommu_init(void)
goto err_set_iommu;
}
init_done = true;
return 0;
err_set_iommu:
kmem_cache_free(lv2table_kmem_cache, zero_lv2_table);
@ -1203,4 +1205,21 @@ err_reg_driver:
kmem_cache_destroy(lv2table_kmem_cache);
return ret;
}
subsys_initcall(exynos_iommu_init);
static int __init exynos_iommu_of_setup(struct device_node *np)
{
struct platform_device *pdev;
if (!init_done)
exynos_iommu_init();
pdev = of_platform_device_create(np, NULL, platform_bus_type.dev_root);
if (IS_ERR(pdev))
return PTR_ERR(pdev);
of_iommu_set_ops(np, &exynos_iommu_ops);
return 0;
}
IOMMU_OF_DECLARE(exynos_iommu_of, "samsung,exynos-sysmmu",
exynos_iommu_of_setup);