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 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 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 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