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 pdata->da_start = a->da_start; 38 pdata->da_end = a->da_end; 39 40 if (oh->rst_lines_cnt == 1) { 41 pdata->reset_name = oh->rst_lines->name; 42 pdata->assert_reset = omap_device_assert_hardreset; 43 pdata->deassert_reset = omap_device_deassert_hardreset; 44 } 45 46 pdev = omap_device_build("omap-iommu", i, oh, pdata, sizeof(*pdata)); 47 48 kfree(pdata); 49 50 if (IS_ERR(pdev)) { 51 pr_err("%s: device build err: %ld\n", __func__, PTR_ERR(pdev)); 52 return PTR_ERR(pdev); 53 } 54 55 i++; 56 57 return 0; 58 } 59 60 static int __init omap_iommu_init(void) 61 { 62 /* If dtb is there, the devices will be created dynamically */ 63 if (of_have_populated_dt()) 64 return -ENODEV; 65 66 return omap_hwmod_for_each_by_class("mmu", omap_iommu_dev_init, NULL); 67 } 68 /* must be ready before omap3isp is probed */ 69 omap_subsys_initcall(omap_iommu_init); 70 71 static void __exit omap_iommu_exit(void) 72 { 73 /* Do nothing */ 74 } 75 module_exit(omap_iommu_exit); 76 77 MODULE_AUTHOR("Hiroshi DOYU"); 78 MODULE_DESCRIPTION("omap iommu: omap device registration"); 79 MODULE_LICENSE("GPL v2"); 80