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/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/err.h>
17 #include <linux/slab.h>
18
19 #include <linux/platform_data/iommu-omap.h>
20 #include "soc.h"
21 #include "omap_hwmod.h"
22 #include "omap_device.h"
23
omap_iommu_dev_init(struct omap_hwmod * oh,void * unused)24 static int __init omap_iommu_dev_init(struct omap_hwmod *oh, void *unused)
25 {
26 struct platform_device *pdev;
27 struct iommu_platform_data *pdata;
28 struct omap_mmu_dev_attr *a = (struct omap_mmu_dev_attr *)oh->dev_attr;
29 static int i;
30
31 pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
32 if (!pdata)
33 return -ENOMEM;
34
35 pdata->name = oh->name;
36 pdata->nr_tlb_entries = a->nr_tlb_entries;
37
38 if (oh->rst_lines_cnt == 1) {
39 pdata->reset_name = oh->rst_lines->name;
40 pdata->assert_reset = omap_device_assert_hardreset;
41 pdata->deassert_reset = omap_device_deassert_hardreset;
42 }
43
44 pdev = omap_device_build("omap-iommu", i, oh, pdata, sizeof(*pdata));
45
46 kfree(pdata);
47
48 if (IS_ERR(pdev)) {
49 pr_err("%s: device build err: %ld\n", __func__, PTR_ERR(pdev));
50 return PTR_ERR(pdev);
51 }
52
53 i++;
54
55 return 0;
56 }
57
omap_iommu_init(void)58 static int __init omap_iommu_init(void)
59 {
60 /* If dtb is there, the devices will be created dynamically */
61 if (of_have_populated_dt())
62 return -ENODEV;
63
64 return omap_hwmod_for_each_by_class("mmu", omap_iommu_dev_init, NULL);
65 }
66 /* must be ready before omap3isp is probed */
67 omap_subsys_initcall(omap_iommu_init);
68
omap_iommu_exit(void)69 static void __exit omap_iommu_exit(void)
70 {
71 /* Do nothing */
72 }
73 module_exit(omap_iommu_exit);
74
75 MODULE_AUTHOR("Hiroshi DOYU");
76 MODULE_DESCRIPTION("omap iommu: omap device registration");
77 MODULE_LICENSE("GPL v2");
78