These changes are the raw update to linux-4.4.6-rt14. Kernel sources
[kvmfornfv.git] / kernel / arch / arm / mach-omap2 / omap-iommu.c
1 /*
2  * omap iommu: omap device registration
3  *
4  * Copyright (C) 2008-2009 Nokia Corporation
5  *
6  * Written by Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
7  *
8  * This program is free software; you can redistribute it and/or modify
9  * it under the terms of the GNU General Public License version 2 as
10  * published by the Free Software Foundation.
11  */
12
13 #include <linux/of.h>
14 #include <linux/platform_device.h>
15 #include <linux/err.h>
16 #include <linux/slab.h>
17
18 #include <linux/platform_data/iommu-omap.h>
19 #include "soc.h"
20 #include "omap_hwmod.h"
21 #include "omap_device.h"
22
23 static int __init omap_iommu_dev_init(struct omap_hwmod *oh, void *unused)
24 {
25         struct platform_device *pdev;
26         struct iommu_platform_data *pdata;
27         struct omap_mmu_dev_attr *a = (struct omap_mmu_dev_attr *)oh->dev_attr;
28         static int i;
29
30         pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
31         if (!pdata)
32                 return -ENOMEM;
33
34         pdata->name = oh->name;
35         pdata->nr_tlb_entries = a->nr_tlb_entries;
36
37         if (oh->rst_lines_cnt == 1) {
38                 pdata->reset_name = oh->rst_lines->name;
39                 pdata->assert_reset = omap_device_assert_hardreset;
40                 pdata->deassert_reset = omap_device_deassert_hardreset;
41         }
42
43         pdev = omap_device_build("omap-iommu", i, oh, pdata, sizeof(*pdata));
44
45         kfree(pdata);
46
47         if (IS_ERR(pdev)) {
48                 pr_err("%s: device build err: %ld\n", __func__, PTR_ERR(pdev));
49                 return PTR_ERR(pdev);
50         }
51
52         i++;
53
54         return 0;
55 }
56
57 static int __init omap_iommu_init(void)
58 {
59         /* If dtb is there, the devices will be created dynamically */
60         if (of_have_populated_dt())
61                 return -ENODEV;
62
63         return omap_hwmod_for_each_by_class("mmu", omap_iommu_dev_init, NULL);
64 }
65 omap_subsys_initcall(omap_iommu_init);
66 /* must be ready before omap3isp is probed */