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 */ 67