mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
689 lines
19 KiB
689 lines
19 KiB
// SPDX-License-Identifier: GPL-2.0+ |
|
/* |
|
* 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 ([email protected]) |
|
* Updated and modified by Cort Dougan <[email protected]> |
|
* Copyright (C) 1996-2001 Cort Dougan |
|
* Adapted for Power Macintosh by Paul Mackerras |
|
* Copyright (C) 1996 Paul Mackerras ([email protected]) |
|
* |
|
* This file contains the code used to make IRQ descriptions in the |
|
* device tree to actual irq numbers on an interrupt controller |
|
* driver. |
|
*/ |
|
|
|
#define pr_fmt(fmt) "OF: " fmt |
|
|
|
#include <linux/device.h> |
|
#include <linux/errno.h> |
|
#include <linux/list.h> |
|
#include <linux/module.h> |
|
#include <linux/of.h> |
|
#include <linux/of_irq.h> |
|
#include <linux/string.h> |
|
#include <linux/slab.h> |
|
|
|
/** |
|
* irq_of_parse_and_map - Parse and map an interrupt into linux virq space |
|
* @dev: Device node of the device whose interrupt is to be mapped |
|
* @index: Index of the interrupt to map |
|
* |
|
* This function is a wrapper that chains of_irq_parse_one() and |
|
* irq_create_of_mapping() to make things easier to callers |
|
*/ |
|
unsigned int irq_of_parse_and_map(struct device_node *dev, int index) |
|
{ |
|
struct of_phandle_args oirq; |
|
|
|
if (of_irq_parse_one(dev, index, &oirq)) |
|
return 0; |
|
|
|
return irq_create_of_mapping(&oirq); |
|
} |
|
EXPORT_SYMBOL_GPL(irq_of_parse_and_map); |
|
|
|
/** |
|
* 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. |
|
*/ |
|
struct device_node *of_irq_find_parent(struct device_node *child) |
|
{ |
|
struct device_node *p; |
|
phandle parent; |
|
|
|
if (!of_node_get(child)) |
|
return NULL; |
|
|
|
do { |
|
if (of_property_read_u32(child, "interrupt-parent", &parent)) { |
|
p = of_get_parent(child); |
|
} else { |
|
if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) |
|
p = of_node_get(of_irq_dflt_pic); |
|
else |
|
p = of_find_node_by_phandle(parent); |
|
} |
|
of_node_put(child); |
|
child = p; |
|
} while (p && of_get_property(p, "#interrupt-cells", NULL) == NULL); |
|
|
|
return p; |
|
} |
|
EXPORT_SYMBOL_GPL(of_irq_find_parent); |
|
|
|
/** |
|
* of_irq_parse_raw - Low level interrupt tree parsing |
|
* @addr: address specifier (start of "reg" property of the device) in be32 format |
|
* @out_irq: structure of_phandle_args updated by this function |
|
* |
|
* 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 |
|
* 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. |
|
*/ |
|
int of_irq_parse_raw(const __be32 *addr, struct of_phandle_args *out_irq) |
|
{ |
|
struct device_node *ipar, *tnode, *old = NULL, *newpar = NULL; |
|
__be32 initial_match_array[MAX_PHANDLE_ARGS]; |
|
const __be32 *match_array = initial_match_array; |
|
const __be32 *tmp, *imap, *imask, dummy_imask[] = { [0 ... MAX_PHANDLE_ARGS] = cpu_to_be32(~0) }; |
|
u32 intsize = 1, addrsize, newintsize = 0, newaddrsize = 0; |
|
int imaplen, match, i, rc = -EINVAL; |
|
|
|
#ifdef DEBUG |
|
of_print_phandle_args("of_irq_parse_raw: ", out_irq); |
|
#endif |
|
|
|
ipar = of_node_get(out_irq->np); |
|
|
|
/* 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 { |
|
if (!of_property_read_u32(ipar, "#interrupt-cells", &intsize)) |
|
break; |
|
tnode = ipar; |
|
ipar = of_irq_find_parent(ipar); |
|
of_node_put(tnode); |
|
} while (ipar); |
|
if (ipar == NULL) { |
|
pr_debug(" -> no parent found !\n"); |
|
goto fail; |
|
} |
|
|
|
pr_debug("of_irq_parse_raw: ipar=%pOF, size=%d\n", ipar, intsize); |
|
|
|
if (out_irq->args_count != intsize) |
|
goto fail; |
|
|
|
/* 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; |
|
addrsize = (tmp == NULL) ? 2 : be32_to_cpu(*tmp); |
|
|
|
pr_debug(" -> addrsize=%d\n", addrsize); |
|
|
|
/* Range check so that the temporary buffer doesn't overflow */ |
|
if (WARN_ON(addrsize + intsize > MAX_PHANDLE_ARGS)) { |
|
rc = -EFAULT; |
|
goto fail; |
|
} |
|
|
|
/* Precalculate the match array - this simplifies match loop */ |
|
for (i = 0; i < addrsize; i++) |
|
initial_match_array[i] = addr ? addr[i] : 0; |
|
for (i = 0; i < intsize; i++) |
|
initial_match_array[addrsize + i] = cpu_to_be32(out_irq->args[i]); |
|
|
|
/* 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 |
|
*/ |
|
if (of_property_read_bool(ipar, "interrupt-controller")) { |
|
pr_debug(" -> got it !\n"); |
|
return 0; |
|
} |
|
|
|
/* |
|
* 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 !\n"); |
|
goto fail; |
|
} |
|
|
|
/* 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\n"); |
|
newpar = of_irq_find_parent(ipar); |
|
goto skiplevel; |
|
} |
|
imaplen /= sizeof(u32); |
|
|
|
/* Look for a mask */ |
|
imask = of_get_property(ipar, "interrupt-map-mask", NULL); |
|
if (!imask) |
|
imask = dummy_imask; |
|
|
|
/* Parse interrupt-map */ |
|
match = 0; |
|
while (imaplen > (addrsize + intsize + 1) && !match) { |
|
/* Compare specifiers */ |
|
match = 1; |
|
for (i = 0; i < (addrsize + intsize); i++, imaplen--) |
|
match &= !((match_array[i] ^ *imap++) & imask[i]); |
|
|
|
pr_debug(" -> match=%d (imaplen=%d)\n", match, imaplen); |
|
|
|
/* Get the interrupt parent */ |
|
if (of_irq_workarounds & OF_IMAP_NO_PHANDLE) |
|
newpar = of_node_get(of_irq_dflt_pic); |
|
else |
|
newpar = of_find_node_by_phandle(be32_to_cpup(imap)); |
|
imap++; |
|
--imaplen; |
|
|
|
/* Check if not found */ |
|
if (newpar == NULL) { |
|
pr_debug(" -> imap parent not found !\n"); |
|
goto fail; |
|
} |
|
|
|
if (!of_device_is_available(newpar)) |
|
match = 0; |
|
|
|
/* Get #interrupt-cells and #address-cells of new |
|
* parent |
|
*/ |
|
if (of_property_read_u32(newpar, "#interrupt-cells", |
|
&newintsize)) { |
|
pr_debug(" -> parent lacks #interrupt-cells!\n"); |
|
goto fail; |
|
} |
|
if (of_property_read_u32(newpar, "#address-cells", |
|
&newaddrsize)) |
|
newaddrsize = 0; |
|
|
|
pr_debug(" -> newintsize=%d, newaddrsize=%d\n", |
|
newintsize, newaddrsize); |
|
|
|
/* Check for malformed properties */ |
|
if (WARN_ON(newaddrsize + newintsize > MAX_PHANDLE_ARGS) |
|
|| (imaplen < (newaddrsize + newintsize))) { |
|
rc = -EFAULT; |
|
goto fail; |
|
} |
|
|
|
imap += newaddrsize + newintsize; |
|
imaplen -= newaddrsize + newintsize; |
|
|
|
pr_debug(" -> imaplen=%d\n", imaplen); |
|
} |
|
if (!match) |
|
goto fail; |
|
|
|
/* |
|
* Successfully parsed an interrrupt-map translation; copy new |
|
* interrupt specifier into the out_irq structure |
|
*/ |
|
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; |
|
addrsize = newaddrsize; |
|
|
|
skiplevel: |
|
/* Iterate again with new parent */ |
|
out_irq->np = newpar; |
|
pr_debug(" -> new parent: %pOF\n", newpar); |
|
of_node_put(ipar); |
|
ipar = newpar; |
|
newpar = NULL; |
|
} |
|
rc = -ENOENT; /* No interrupt-map found */ |
|
|
|
fail: |
|
of_node_put(ipar); |
|
of_node_put(newpar); |
|
|
|
return rc; |
|
} |
|
EXPORT_SYMBOL_GPL(of_irq_parse_raw); |
|
|
|
/** |
|
* of_irq_parse_one - Resolve an interrupt for a device |
|
* @device: the device whose interrupt is to be resolved |
|
* @index: index of the interrupt to resolve |
|
* @out_irq: structure of_phandle_args filled by this function |
|
* |
|
* 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. |
|
*/ |
|
int of_irq_parse_one(struct device_node *device, int index, struct of_phandle_args *out_irq) |
|
{ |
|
struct device_node *p; |
|
const __be32 *addr; |
|
u32 intsize; |
|
int i, res; |
|
|
|
pr_debug("of_irq_parse_one: dev=%pOF, index=%d\n", device, index); |
|
|
|
/* OldWorld mac stuff is "special", handle out of line */ |
|
if (of_irq_workarounds & OF_IMAP_OLDWORLD_MAC) |
|
return of_irq_parse_oldworld(device, index, out_irq); |
|
|
|
/* Get the reg property (if any) */ |
|
addr = of_get_property(device, "reg", NULL); |
|
|
|
/* 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); |
|
|
|
/* Look for the interrupt parent. */ |
|
p = of_irq_find_parent(device); |
|
if (p == NULL) |
|
return -EINVAL; |
|
|
|
/* Get size of interrupt specifier */ |
|
if (of_property_read_u32(p, "#interrupt-cells", &intsize)) { |
|
res = -EINVAL; |
|
goto out; |
|
} |
|
|
|
pr_debug(" parent=%pOF, intsize=%d\n", p, intsize); |
|
|
|
/* Copy intspec into irq structure */ |
|
out_irq->np = p; |
|
out_irq->args_count = intsize; |
|
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\n", *out_irq->args); |
|
|
|
|
|
/* Check if there are any interrupt-map translations to process */ |
|
res = of_irq_parse_raw(addr, out_irq); |
|
out: |
|
of_node_put(p); |
|
return res; |
|
} |
|
EXPORT_SYMBOL_GPL(of_irq_parse_one); |
|
|
|
/** |
|
* 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) |
|
{ |
|
int irq = of_irq_get(dev, index); |
|
|
|
if (irq < 0) |
|
return irq; |
|
|
|
/* Only dereference the resource if both the |
|
* resource and the irq are valid. */ |
|
if (r && irq) { |
|
const char *name = NULL; |
|
|
|
memset(r, 0, sizeof(*r)); |
|
/* |
|
* Get optional "interrupt-names" property to add a name |
|
* to the resource. |
|
*/ |
|
of_property_read_string_index(dev, "interrupt-names", index, |
|
&name); |
|
|
|
r->start = r->end = irq; |
|
r->flags = IORESOURCE_IRQ | irqd_get_trigger_type(irq_get_irq_data(irq)); |
|
r->name = name ? name : of_node_full_name(dev); |
|
} |
|
|
|
return irq; |
|
} |
|
EXPORT_SYMBOL_GPL(of_irq_to_resource); |
|
|
|
/** |
|
* of_irq_get - Decode a node's IRQ and return it as a Linux IRQ number |
|
* @dev: pointer to device tree node |
|
* @index: zero-based index of the IRQ |
|
* |
|
* 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. |
|
*/ |
|
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); |
|
} |
|
EXPORT_SYMBOL_GPL(of_irq_get); |
|
|
|
/** |
|
* of_irq_get_byname - Decode a node's IRQ and return it as a Linux IRQ number |
|
* @dev: pointer to device tree node |
|
* @name: IRQ name |
|
* |
|
* 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. |
|
*/ |
|
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); |
|
} |
|
EXPORT_SYMBOL_GPL(of_irq_get_byname); |
|
|
|
/** |
|
* 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) |
|
{ |
|
struct of_phandle_args irq; |
|
int nr = 0; |
|
|
|
while (of_irq_parse_one(dev, nr, &irq) == 0) |
|
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++) |
|
if (of_irq_to_resource(dev, i, res) <= 0) |
|
break; |
|
|
|
return i; |
|
} |
|
EXPORT_SYMBOL_GPL(of_irq_to_resource_table); |
|
|
|
struct of_intc_desc { |
|
struct list_head list; |
|
of_irq_init_cb_t irq_init_cb; |
|
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) |
|
{ |
|
const struct of_device_id *match; |
|
struct device_node *np, *parent = NULL; |
|
struct of_intc_desc *desc, *temp_desc; |
|
struct list_head intc_desc_list, intc_parent_list; |
|
|
|
INIT_LIST_HEAD(&intc_desc_list); |
|
INIT_LIST_HEAD(&intc_parent_list); |
|
|
|
for_each_matching_node_and_match(np, matches, &match) { |
|
if (!of_property_read_bool(np, "interrupt-controller") || |
|
!of_device_is_available(np)) |
|
continue; |
|
|
|
if (WARN(!match->data, "of_irq_init: no init function for %s\n", |
|
match->compatible)) |
|
continue; |
|
|
|
/* |
|
* Here, we allocate and populate an of_intc_desc with the node |
|
* pointer, interrupt-parent device_node etc. |
|
*/ |
|
desc = kzalloc(sizeof(*desc), GFP_KERNEL); |
|
if (!desc) { |
|
of_node_put(np); |
|
goto err; |
|
} |
|
|
|
desc->irq_init_cb = match->data; |
|
desc->dev = of_node_get(np); |
|
desc->interrupt_parent = of_irq_find_parent(np); |
|
if (desc->interrupt_parent == np) |
|
desc->interrupt_parent = NULL; |
|
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) { |
|
int ret; |
|
|
|
if (desc->interrupt_parent != parent) |
|
continue; |
|
|
|
list_del(&desc->list); |
|
|
|
of_node_set_flag(desc->dev, OF_POPULATED); |
|
|
|
pr_debug("of_irq_init: init %pOF (%p), parent %p\n", |
|
desc->dev, |
|
desc->dev, desc->interrupt_parent); |
|
ret = desc->irq_init_cb(desc->dev, |
|
desc->interrupt_parent); |
|
if (ret) { |
|
of_node_clear_flag(desc->dev, OF_POPULATED); |
|
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 */ |
|
desc = list_first_entry_or_null(&intc_parent_list, |
|
typeof(*desc), list); |
|
if (!desc) { |
|
pr_err("of_irq_init: children remain, but no parents\n"); |
|
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); |
|
of_node_put(desc->dev); |
|
kfree(desc); |
|
} |
|
} |
|
|
|
static u32 __of_msi_map_id(struct device *dev, struct device_node **np, |
|
u32 id_in) |
|
{ |
|
struct device *parent_dev; |
|
u32 id_out = id_in; |
|
|
|
/* |
|
* Walk up the device parent links looking for one with a |
|
* "msi-map" property. |
|
*/ |
|
for (parent_dev = dev; parent_dev; parent_dev = parent_dev->parent) |
|
if (!of_map_id(parent_dev->of_node, id_in, "msi-map", |
|
"msi-map-mask", np, &id_out)) |
|
break; |
|
return id_out; |
|
} |
|
|
|
/** |
|
* of_msi_map_id - Map a MSI ID for a device. |
|
* @dev: device for which the mapping is to be done. |
|
* @msi_np: device node of the expected msi controller. |
|
* @id_in: unmapped MSI ID for the device. |
|
* |
|
* Walk up the device hierarchy looking for devices with a "msi-map" |
|
* property. If found, apply the mapping to @id_in. |
|
* |
|
* Returns the mapped MSI ID. |
|
*/ |
|
u32 of_msi_map_id(struct device *dev, struct device_node *msi_np, u32 id_in) |
|
{ |
|
return __of_msi_map_id(dev, &msi_np, id_in); |
|
} |
|
|
|
/** |
|
* 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. |
|
* @id: Device ID. |
|
* @bus_token: Bus token |
|
* |
|
* Walk up the device hierarchy looking for devices with a "msi-map" |
|
* property. |
|
* |
|
* Returns: the MSI domain for this device (or NULL on failure) |
|
*/ |
|
struct irq_domain *of_msi_map_get_device_domain(struct device *dev, u32 id, |
|
u32 bus_token) |
|
{ |
|
struct device_node *np = NULL; |
|
|
|
__of_msi_map_id(dev, &np, id); |
|
return irq_find_matching_host(np, bus_token); |
|
} |
|
|
|
/** |
|
* 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")) { |
|
d = irq_find_matching_host(msi_np, token); |
|
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)) { |
|
d = irq_find_matching_host(args.np, token); |
|
if (d) |
|
return d; |
|
|
|
of_node_put(args.np); |
|
index++; |
|
} |
|
} |
|
|
|
return NULL; |
|
} |
|
|
|
/** |
|
* 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)); |
|
} |
|
EXPORT_SYMBOL_GPL(of_msi_configure);
|
|
|