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drivers/of/irq.c
18.6 KB
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// SPDX-License-Identifier: GPL-2.0+ |
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/* * Derived from arch/i386/kernel/irq.c * Copyright (C) 1992 Linus Torvalds * Adapted from arch/i386 by Gary Thomas * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) * Updated and modified by Cort Dougan <cort@fsmlabs.com> * Copyright (C) 1996-2001 Cort Dougan * Adapted for Power Macintosh by Paul Mackerras * Copyright (C) 1996 Paul Mackerras (paulus@cs.anu.edu.au) * |
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* This file contains the code used to make IRQ descriptions in the * device tree to actual irq numbers on an interrupt controller * driver. */ |
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#define pr_fmt(fmt) "OF: " fmt |
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#include <linux/device.h> |
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#include <linux/errno.h> |
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#include <linux/list.h> |
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#include <linux/module.h> #include <linux/of.h> #include <linux/of_irq.h> #include <linux/string.h> |
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#include <linux/slab.h> |
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/** * irq_of_parse_and_map - Parse and map an interrupt into linux virq space |
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* @dev: Device node of the device whose interrupt is to be mapped |
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* @index: Index of the interrupt to map * |
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* This function is a wrapper that chains of_irq_parse_one() and |
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* irq_create_of_mapping() to make things easier to callers */ unsigned int irq_of_parse_and_map(struct device_node *dev, int index) { |
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struct of_phandle_args oirq; |
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|
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if (of_irq_parse_one(dev, index, &oirq)) |
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return 0; |
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|
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return irq_create_of_mapping(&oirq); |
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} EXPORT_SYMBOL_GPL(irq_of_parse_and_map); |
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/** * of_irq_find_parent - Given a device node, find its interrupt parent node * @child: pointer to device node * * Returns a pointer to the interrupt parent node, or NULL if the interrupt * parent could not be determined. */ |
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struct device_node *of_irq_find_parent(struct device_node *child) |
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{ |
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struct device_node *p; |
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phandle parent; |
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|
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if (!of_node_get(child)) |
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return NULL; do { |
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if (of_property_read_u32(child, "interrupt-parent", &parent)) { |
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p = of_get_parent(child); |
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} else { |
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if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) p = of_node_get(of_irq_dflt_pic); else |
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p = of_find_node_by_phandle(parent); |
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} |
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of_node_put(child); child = p; |
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} while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL); |
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return p; |
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} |
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EXPORT_SYMBOL_GPL(of_irq_find_parent); |
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/** |
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* of_irq_parse_raw - Low level interrupt tree parsing |
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* @addr: address specifier (start of "reg" property of the device) in be32 format |
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* @out_irq: structure of_phandle_args updated by this function |
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* * Returns 0 on success and a negative number on error * * This function is a low-level interrupt tree walking function. It * can be used to do a partial walk with synthetized reg and interrupts * properties, for example when resolving PCI interrupts when no device |
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* node exist for the parent. It takes an interrupt specifier structure as * input, walks the tree looking for any interrupt-map properties, translates * the specifier for each map, and then returns the translated map. |
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*/ |
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int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq) |
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{ struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL; |
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__be32 initial_match_array[MAX_PHANDLE_ARGS]; |
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const __be32 *match_array = initial_match_array; |
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const __be32 *tmp, *imap, *imask, dummy_imask[] = { [0 ... MAX_PHANDLE_ARGS] = cpu_to_be32(~0) }; |
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u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0; |
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int imaplen, match, i, rc = -EINVAL; |
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|
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#ifdef DEBUG of_print_phandle_args("of_irq_parse_raw: ", out_irq); #endif |
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|
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ipar = of_node_get(out_irq->np); |
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/* First get the #interrupt-cells property of the current cursor * that tells us how to interpret the passed-in intspec. If there * is none, we are nice and just walk up the tree */ do { |
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if (!of_property_read_u32(ipar, "#interrupt-cells", &intsize)) |
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break; |
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tnode = ipar; ipar = of_irq_find_parent(ipar); of_node_put(tnode); } while (ipar); if (ipar == NULL) { pr_debug(" -> no parent found ! "); goto fail; } |
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pr_debug("of_irq_parse_raw: ipar=%pOF, size=%d ", ipar, intsize); |
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|
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if (out_irq->args_count != intsize) |
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goto fail; |
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/* Look for this #address-cells. We have to implement the old linux * trick of looking for the parent here as some device-trees rely on it */ old = of_node_get(ipar); do { tmp = of_get_property(old, "#address-cells", NULL); tnode = of_get_parent(old); of_node_put(old); old = tnode; } while (old && tmp == NULL); of_node_put(old); old = NULL; |
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addrsize = (tmp == NULL) ? 2 : be32_to_cpu(*tmp); |
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pr_debug(" -> addrsize=%d ", addrsize); |
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/* Range check so that the temporary buffer doesn't overflow */ |
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if (WARN_ON(addrsize + intsize > MAX_PHANDLE_ARGS)) { rc = -EFAULT; |
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goto fail; |
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} |
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|
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/* Precalculate the match array - this simplifies match loop */ for (i = 0; i < addrsize; i++) |
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initial_match_array[i] = addr ? addr[i] : 0; |
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for (i = 0; i < intsize; i++) initial_match_array[addrsize + i] = cpu_to_be32(out_irq->args[i]); |
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/* Now start the actual "proper" walk of the interrupt tree */ while (ipar != NULL) { /* Now check if cursor is an interrupt-controller and if it is * then we are done */ |
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if (of_property_read_bool(ipar, "interrupt-controller")) { |
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pr_debug(" -> got it ! "); |
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return 0; } |
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/* * interrupt-map parsing does not work without a reg * property when #address-cells != 0 */ if (addrsize && !addr) { pr_debug(" -> no reg passed in when needed ! "); goto fail; } |
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/* Now look for an interrupt-map */ imap = of_get_property(ipar, "interrupt-map", &imaplen); /* No interrupt map, check for an interrupt parent */ if (imap == NULL) { pr_debug(" -> no map, getting parent "); newpar = of_irq_find_parent(ipar); goto skiplevel; } imaplen /= sizeof(u32); /* Look for a mask */ imask = of_get_property(ipar, "interrupt-map-mask", NULL); |
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if (!imask) imask = dummy_imask; |
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/* Parse interrupt-map */ match = 0; while (imaplen > (addrsize + intsize + 1) && !match) { /* Compare specifiers */ match = 1; |
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for (i = 0; i < (addrsize + intsize); i++, imaplen--) |
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match &= !((match_array[i] ^ *imap++) & imask[i]); |
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pr_debug(" -> match=%d (imaplen=%d) ", match, imaplen); /* Get the interrupt parent */ if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) newpar = of_node_get(of_irq_dflt_pic); else |
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newpar = of_find_node_by_phandle(be32_to_cpup(imap)); |
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imap++; --imaplen; /* Check if not found */ if (newpar == NULL) { pr_debug(" -> imap parent not found ! "); goto fail; } |
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if (!of_device_is_available(newpar)) match = 0; |
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/* Get #interrupt-cells and #address-cells of new * parent */ |
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if (of_property_read_u32(newpar, "#interrupt-cells", &newintsize)) { |
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pr_debug(" -> parent lacks #interrupt-cells! "); goto fail; } |
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if (of_property_read_u32(newpar, "#address-cells", &newaddrsize)) newaddrsize = 0; |
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pr_debug(" -> newintsize=%d, newaddrsize=%d ", newintsize, newaddrsize); /* Check for malformed properties */ |
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if (WARN_ON(newaddrsize + newintsize > MAX_PHANDLE_ARGS) || (imaplen < (newaddrsize + newintsize))) { rc = -EFAULT; |
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goto fail; |
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} |
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imap += newaddrsize + newintsize; imaplen -= newaddrsize + newintsize; pr_debug(" -> imaplen=%d ", imaplen); } if (!match) goto fail; |
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/* * Successfully parsed an interrrupt-map translation; copy new * interrupt specifier into the out_irq structure */ |
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match_array = imap - newaddrsize - newintsize; for (i = 0; i < newintsize; i++) out_irq->args[i] = be32_to_cpup(imap - newintsize + i); out_irq->args_count = intsize = newintsize; |
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addrsize = newaddrsize; |
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skiplevel: /* Iterate again with new parent */ |
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out_irq->np = newpar; |
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pr_debug(" -> new parent: %pOF ", newpar); |
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of_node_put(ipar); ipar = newpar; newpar = NULL; } |
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rc = -ENOENT; /* No interrupt-map found */ |
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fail: of_node_put(ipar); |
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of_node_put(newpar); |
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return rc; |
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} |
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EXPORT_SYMBOL_GPL(of_irq_parse_raw); |
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/** |
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* of_irq_parse_one - Resolve an interrupt for a device |
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* @device: the device whose interrupt is to be resolved * @index: index of the interrupt to resolve |
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* @out_irq: structure of_phandle_args filled by this function |
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* |
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* This function resolves an interrupt for a node by walking the interrupt tree, * finding which interrupt controller node it is attached to, and returning the * interrupt specifier that can be used to retrieve a Linux IRQ number. |
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*/ |
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int of_irq_parse_one(struct device_node *device, int index, struct of_phandle_args *out_irq) |
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{ struct device_node *p; |
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const __be32 *addr; u32 intsize; |
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int i, res; |
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|
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pr_debug("of_irq_parse_one: dev=%pOF, index=%d ", device, index); |
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/* OldWorld mac stuff is "special", handle out of line */ if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) |
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return of_irq_parse_oldworld(device, index, out_irq); |
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|
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/* Get the reg property (if any) */ addr = of_get_property(device, "reg", NULL); |
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/* Try the new-style interrupts-extended first */ res = of_parse_phandle_with_args(device, "interrupts-extended", "#interrupt-cells", index, out_irq); if (!res) return of_irq_parse_raw(addr, out_irq); |
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/* Look for the interrupt parent. */ p = of_irq_find_parent(device); if (p == NULL) return -EINVAL; /* Get size of interrupt specifier */ |
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if (of_property_read_u32(p, "#interrupt-cells", &intsize)) { |
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res = -EINVAL; |
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goto out; |
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} |
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|
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pr_debug(" parent=%pOF, intsize=%d ", p, intsize); |
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|
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/* Copy intspec into irq structure */ |
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out_irq->np = p; out_irq->args_count = intsize; |
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for (i = 0; i < intsize; i++) { res = of_property_read_u32_index(device, "interrupts", (index * intsize) + i, out_irq->args + i); if (res) goto out; } pr_debug(" intspec=%d ", *out_irq->args); |
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/* Check if there are any interrupt-map translations to process */ res = of_irq_parse_raw(addr, out_irq); |
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out: of_node_put(p); return res; } |
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EXPORT_SYMBOL_GPL(of_irq_parse_one); |
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/** * of_irq_to_resource - Decode a node's IRQ and return it as a resource * @dev: pointer to device tree node * @index: zero-based index of the irq * @r: pointer to resource structure to return result into. */ int of_irq_to_resource(struct device_node *dev, int index, struct resource *r) { |
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int irq = of_irq_get(dev, index); if (irq < 0) return irq; |
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/* Only dereference the resource if both the * resource and the irq are valid. */ |
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if (r && irq) { |
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const char *name = NULL; |
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memset(r, 0, sizeof(*r)); |
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/* |
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* Get optional "interrupt-names" property to add a name |
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* to the resource. */ of_property_read_string_index(dev, "interrupt-names", index, &name); |
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r->start = r->end = irq; |
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r->flags = IORESOURCE_IRQ | irqd_get_trigger_type(irq_get_irq_data(irq)); |
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r->name = name ? name : of_node_full_name(dev); |
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} return irq; } EXPORT_SYMBOL_GPL(of_irq_to_resource); |
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/** |
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* of_irq_get - Decode a node's IRQ and return it as a Linux IRQ number |
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* @dev: pointer to device tree node |
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* @index: zero-based index of the IRQ |
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* |
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* Returns Linux IRQ number on success, or 0 on the IRQ mapping failure, or * -EPROBE_DEFER if the IRQ domain is not yet created, or error code in case * of any other failure. |
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*/ int of_irq_get(struct device_node *dev, int index) { int rc; struct of_phandle_args oirq; struct irq_domain *domain; rc = of_irq_parse_one(dev, index, &oirq); if (rc) return rc; domain = irq_find_host(oirq.np); if (!domain) return -EPROBE_DEFER; return irq_create_of_mapping(&oirq); } |
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EXPORT_SYMBOL_GPL(of_irq_get); |
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/** |
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* of_irq_get_byname - Decode a node's IRQ and return it as a Linux IRQ number |
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* @dev: pointer to device tree node |
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* @name: IRQ name |
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* |
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* Returns Linux IRQ number on success, or 0 on the IRQ mapping failure, or * -EPROBE_DEFER if the IRQ domain is not yet created, or error code in case * of any other failure. |
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*/ int of_irq_get_byname(struct device_node *dev, const char *name) { int index; if (unlikely(!name)) return -EINVAL; index = of_property_match_string(dev, "interrupt-names", name); if (index < 0) return index; return of_irq_get(dev, index); } |
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EXPORT_SYMBOL_GPL(of_irq_get_byname); |
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/** |
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* of_irq_count - Count the number of IRQs a node uses * @dev: pointer to device tree node */ int of_irq_count(struct device_node *dev) { |
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struct of_phandle_args irq; |
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int nr = 0; |
3da527872 of/irq: Rework of... |
434 |
while (of_irq_parse_one(dev, nr, &irq) == 0) |
52f6537cb of/irq: remove re... |
435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 |
nr++; return nr; } /** * of_irq_to_resource_table - Fill in resource table with node's IRQ info * @dev: pointer to device tree node * @res: array of resources to fill in * @nr_irqs: the number of IRQs (and upper bound for num of @res elements) * * Returns the size of the filled in table (up to @nr_irqs). */ int of_irq_to_resource_table(struct device_node *dev, struct resource *res, int nr_irqs) { int i; for (i = 0; i < nr_irqs; i++, res++) |
531da7407 of: irq: fix of_i... |
454 |
if (of_irq_to_resource(dev, i, res) <= 0) |
52f6537cb of/irq: remove re... |
455 456 457 458 |
break; return i; } |
a4f8bf220 DT: export of_irq... |
459 |
EXPORT_SYMBOL_GPL(of_irq_to_resource_table); |
c71a54b08 of/irq: introduce... |
460 |
|
48a9b733e of/irq: Rename "i... |
461 |
struct of_intc_desc { |
c71a54b08 of/irq: introduce... |
462 |
struct list_head list; |
264041e37 of/irq: optimize ... |
463 |
of_irq_init_cb_t irq_init_cb; |
c71a54b08 of/irq: introduce... |
464 465 466 467 468 469 470 471 472 473 474 475 476 |
struct device_node *dev; struct device_node *interrupt_parent; }; /** * of_irq_init - Scan and init matching interrupt controllers in DT * @matches: 0 terminated array of nodes to match and init function to call * * This function scans the device tree for matching interrupt controller nodes, * and calls their initialization functions in order with parents first. */ void __init of_irq_init(const struct of_device_id *matches) { |
264041e37 of/irq: optimize ... |
477 |
const struct of_device_id *match; |
c71a54b08 of/irq: introduce... |
478 |
struct device_node *np, *parent = NULL; |
48a9b733e of/irq: Rename "i... |
479 |
struct of_intc_desc *desc, *temp_desc; |
c71a54b08 of/irq: introduce... |
480 481 482 483 |
struct list_head intc_desc_list, intc_parent_list; INIT_LIST_HEAD(&intc_desc_list); INIT_LIST_HEAD(&intc_parent_list); |
264041e37 of/irq: optimize ... |
484 |
for_each_matching_node_and_match(np, matches, &match) { |
6a245d959 of: irq: use of_p... |
485 |
if (!of_property_read_bool(np, "interrupt-controller") || |
bf49be02d of: irq: Ignore d... |
486 |
!of_device_is_available(np)) |
c71a54b08 of/irq: introduce... |
487 |
continue; |
264041e37 of/irq: optimize ... |
488 489 490 491 492 |
if (WARN(!match->data, "of_irq_init: no init function for %s ", match->compatible)) continue; |
c71a54b08 of/irq: introduce... |
493 |
/* |
48a9b733e of/irq: Rename "i... |
494 |
* Here, we allocate and populate an of_intc_desc with the node |
c71a54b08 of/irq: introduce... |
495 496 497 |
* pointer, interrupt-parent device_node etc. */ desc = kzalloc(sizeof(*desc), GFP_KERNEL); |
6f7dc9a37 of: irq: Remove W... |
498 |
if (!desc) { |
8363ccb91 of/irq: add missi... |
499 |
of_node_put(np); |
c71a54b08 of/irq: introduce... |
500 |
goto err; |
8363ccb91 of/irq: add missi... |
501 |
} |
c71a54b08 of/irq: introduce... |
502 |
|
264041e37 of/irq: optimize ... |
503 |
desc->irq_init_cb = match->data; |
8363ccb91 of/irq: add missi... |
504 |
desc->dev = of_node_get(np); |
c71a54b08 of/irq: introduce... |
505 |
desc->interrupt_parent = of_irq_find_parent(np); |
d7fb6d0ad of/irq: of_irq_in... |
506 507 |
if (desc->interrupt_parent == np) desc->interrupt_parent = NULL; |
c71a54b08 of/irq: introduce... |
508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 |
list_add_tail(&desc->list, &intc_desc_list); } /* * The root irq controller is the one without an interrupt-parent. * That one goes first, followed by the controllers that reference it, * followed by the ones that reference the 2nd level controllers, etc. */ while (!list_empty(&intc_desc_list)) { /* * Process all controllers with the current 'parent'. * First pass will be looking for NULL as the parent. * The assumption is that NULL parent means a root controller. */ list_for_each_entry_safe(desc, temp_desc, &intc_desc_list, list) { |
c71a54b08 of/irq: introduce... |
523 |
int ret; |
c71a54b08 of/irq: introduce... |
524 525 526 527 528 |
if (desc->interrupt_parent != parent) continue; list_del(&desc->list); |
c71a54b08 of/irq: introduce... |
529 |
|
e55aeb6ba of/irq: Mark inte... |
530 |
of_node_set_flag(desc->dev, OF_POPULATED); |
0d638a07d of: Convert to us... |
531 532 533 |
pr_debug("of_irq_init: init %pOF (%p), parent %p ", desc->dev, |
c71a54b08 of/irq: introduce... |
534 |
desc->dev, desc->interrupt_parent); |
264041e37 of/irq: optimize ... |
535 536 |
ret = desc->irq_init_cb(desc->dev, desc->interrupt_parent); |
c71a54b08 of/irq: introduce... |
537 |
if (ret) { |
e55aeb6ba of/irq: Mark inte... |
538 |
of_node_clear_flag(desc->dev, OF_POPULATED); |
c71a54b08 of/irq: introduce... |
539 540 541 542 543 544 545 546 547 548 549 550 |
kfree(desc); continue; } /* * This one is now set up; add it to the parent list so * its children can get processed in a subsequent pass. */ list_add_tail(&desc->list, &intc_parent_list); } /* Get the next pending parent that might have children */ |
c0cdfaa0a of/irq: Avoid cal... |
551 552 553 |
desc = list_first_entry_or_null(&intc_parent_list, typeof(*desc), list); if (!desc) { |
c71a54b08 of/irq: introduce... |
554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 |
pr_err("of_irq_init: children remain, but no parents "); break; } list_del(&desc->list); parent = desc->dev; kfree(desc); } list_for_each_entry_safe(desc, temp_desc, &intc_parent_list, list) { list_del(&desc->list); kfree(desc); } err: list_for_each_entry_safe(desc, temp_desc, &intc_desc_list, list) { list_del(&desc->list); |
8363ccb91 of/irq: add missi... |
570 |
of_node_put(desc->dev); |
c71a54b08 of/irq: introduce... |
571 572 573 |
kfree(desc); } } |
c706c239a of/platform: Assi... |
574 |
|
2bcdd8f2c of/irq: Make of_m... |
575 576 |
static u32 __of_msi_map_id(struct device *dev, struct device_node **np, u32 id_in) |
8db02d8b4 of/irq: Add new f... |
577 578 |
{ struct device *parent_dev; |
2bcdd8f2c of/irq: Make of_m... |
579 |
u32 id_out = id_in; |
8db02d8b4 of/irq: Add new f... |
580 581 582 583 584 |
/* * Walk up the device parent links looking for one with a * "msi-map" property. */ |
987068fcb of/irq: Break out... |
585 |
for (parent_dev = dev; parent_dev; parent_dev = parent_dev->parent) |
2bcdd8f2c of/irq: Make of_m... |
586 587 |
if (!of_map_id(parent_dev->of_node, id_in, "msi-map", "msi-map-mask", np, &id_out)) |
a251b2633 of/irq: Split of_... |
588 |
break; |
2bcdd8f2c of/irq: Make of_m... |
589 |
return id_out; |
8db02d8b4 of/irq: Add new f... |
590 |
} |
48ae34fb3 of/irq: Add suppo... |
591 |
|
a251b2633 of/irq: Split of_... |
592 |
/** |
2bcdd8f2c of/irq: Make of_m... |
593 |
* of_msi_map_id - Map a MSI ID for a device. |
a251b2633 of/irq: Split of_... |
594 595 |
* @dev: device for which the mapping is to be done. * @msi_np: device node of the expected msi controller. |
2bcdd8f2c of/irq: Make of_m... |
596 |
* @id_in: unmapped MSI ID for the device. |
a251b2633 of/irq: Split of_... |
597 598 |
* * Walk up the device hierarchy looking for devices with a "msi-map" |
2bcdd8f2c of/irq: Make of_m... |
599 |
* property. If found, apply the mapping to @id_in. |
a251b2633 of/irq: Split of_... |
600 |
* |
2bcdd8f2c of/irq: Make of_m... |
601 |
* Returns the mapped MSI ID. |
a251b2633 of/irq: Split of_... |
602 |
*/ |
2bcdd8f2c of/irq: Make of_m... |
603 |
u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in) |
a251b2633 of/irq: Split of_... |
604 |
{ |
2bcdd8f2c of/irq: Make of_m... |
605 |
return __of_msi_map_id(dev, &msi_np, id_in); |
a251b2633 of/irq: Split of_... |
606 |
} |
48ae34fb3 of/irq: Add suppo... |
607 |
/** |
82b9b4243 of/irq: Use the m... |
608 609 |
* of_msi_map_get_device_domain - Use msi-map to find the relevant MSI domain * @dev: device for which the mapping is to be done. |
2bcdd8f2c of/irq: Make of_m... |
610 |
* @id: Device ID. |
6f881aba0 of/irq: make of_m... |
611 |
* @bus_token: Bus token |
82b9b4243 of/irq: Use the m... |
612 613 614 615 616 617 |
* * Walk up the device hierarchy looking for devices with a "msi-map" * property. * * Returns: the MSI domain for this device (or NULL on failure) */ |
6f881aba0 of/irq: make of_m... |
618 619 |
struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 id, u32 bus_token) |
82b9b4243 of/irq: Use the m... |
620 621 |
{ struct device_node *np = NULL; |
2bcdd8f2c of/irq: Make of_m... |
622 |
__of_msi_map_id(dev, &np, id); |
6f881aba0 of/irq: make of_m... |
623 |
return irq_find_matching_host(np, bus_token); |
82b9b4243 of/irq: Use the m... |
624 625 626 |
} /** |
48ae34fb3 of/irq: Add suppo... |
627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 |
* of_msi_get_domain - Use msi-parent to find the relevant MSI domain * @dev: device for which the domain is requested * @np: device node for @dev * @token: bus type for this domain * * Parse the msi-parent property (both the simple and the complex * versions), and returns the corresponding MSI domain. * * Returns: the MSI domain for this device (or NULL on failure). */ struct irq_domain *of_msi_get_domain(struct device *dev, struct device_node *np, enum irq_domain_bus_token token) { struct device_node *msi_np; struct irq_domain *d; /* Check for a single msi-parent property */ msi_np = of_parse_phandle(np, "msi-parent", 0); if (msi_np && !of_property_read_bool(msi_np, "#msi-cells")) { |
14a0db3cd of: MSI: Simplify... |
647 |
d = irq_find_matching_host(msi_np, token); |
48ae34fb3 of/irq: Add suppo... |
648 649 650 651 652 653 654 655 656 657 658 659 660 |
if (!d) of_node_put(msi_np); return d; } if (token == DOMAIN_BUS_PLATFORM_MSI) { /* Check for the complex msi-parent version */ struct of_phandle_args args; int index = 0; while (!of_parse_phandle_with_args(np, "msi-parent", "#msi-cells", index, &args)) { |
14a0db3cd of: MSI: Simplify... |
661 |
d = irq_find_matching_host(args.np, token); |
48ae34fb3 of/irq: Add suppo... |
662 663 664 665 666 667 668 669 670 671 |
if (d) return d; of_node_put(args.np); index++; } } return NULL; } |
61c08240a of/irq: Use of_ms... |
672 673 674 675 676 677 678 679 680 681 682 |
/** * of_msi_configure - Set the msi_domain field of a device * @dev: device structure to associate with an MSI irq domain * @np: device node for that device */ void of_msi_configure(struct device *dev, struct device_node *np) { dev_set_msi_domain(dev, of_msi_get_domain(dev, np, DOMAIN_BUS_PLATFORM_MSI)); } |
5282c1816 of: irq: make of_... |
683 |
EXPORT_SYMBOL_GPL(of_msi_configure); |