1 /* 2 * Support for virtual IRQ subgroups debugfs mapping. 3 * 4 * Copyright (C) 2010 Paul Mundt 5 * 6 * Modelled after arch/powerpc/kernel/irq.c. 7 * 8 * This file is subject to the terms and conditions of the GNU General Public 9 * License. See the file "COPYING" in the main directory of this archive 10 * for more details. 11 */ 12 #include <linux/seq_file.h> 13 #include <linux/fs.h> 14 #include <linux/init.h> 15 #include <linux/irq.h> 16 #include <linux/debugfs.h> 17 #include "internals.h" 18 19 static int intc_irq_xlate_debug(struct seq_file *m, void *priv) 20 { 21 int i; 22 23 seq_printf(m, "%-5s %-7s %-15s\n", "irq", "enum", "chip name"); 24 25 for (i = 1; i < nr_irqs; i++) { 26 struct intc_map_entry *entry = intc_irq_xlate_get(i); 27 struct intc_desc_int *desc = entry->desc; 28 29 if (!desc) 30 continue; 31 32 seq_printf(m, "%5d ", i); 33 seq_printf(m, "0x%05x ", entry->enum_id); 34 seq_printf(m, "%-15s\n", desc->chip.name); 35 } 36 37 return 0; 38 } 39 40 static int intc_irq_xlate_open(struct inode *inode, struct file *file) 41 { 42 return single_open(file, intc_irq_xlate_debug, inode->i_private); 43 } 44 45 static const struct file_operations intc_irq_xlate_fops = { 46 .open = intc_irq_xlate_open, 47 .read = seq_read, 48 .llseek = seq_lseek, 49 .release = single_release, 50 }; 51 52 static int __init intc_irq_xlate_init(void) 53 { 54 /* 55 * XXX.. use arch_debugfs_dir here when all of the intc users are 56 * converted. 57 */ 58 if (debugfs_create_file("intc_irq_xlate", S_IRUGO, NULL, NULL, 59 &intc_irq_xlate_fops) == NULL) 60 return -ENOMEM; 61 62 return 0; 63 } 64 fs_initcall(intc_irq_xlate_init); 65