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OFW: Move code for searching interrupt parent into separate function.

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It can be used by interrupt controller drivers.

Approved by:	kib (mentor)
This commit is contained in:
Michal Meloun 2015-12-02 14:21:16 +00:00
parent 4b3dc89847
commit 821a61efa0
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=291648
2 changed files with 27 additions and 13 deletions
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38
sys/dev/ofw/ofw_bus_subr.c
View File

@ -430,6 +430,27 @@ ofw_bus_reg_to_rl(device_t dev, phandle_t node, pcell_t acells, pcell_t scells,
return (0);
}
/*
* Get interrupt parent for given node.
* Returns 0 if interrupt parent doesn't exist.
*/
phandle_t
ofw_bus_find_iparent(phandle_t node)
{
phandle_t iparent;
if (OF_searchencprop(node, "interrupt-parent", &iparent,
sizeof(iparent)) == -1) {
for (iparent = node; iparent != 0;
iparent = OF_parent(iparent)) {
if (OF_hasprop(iparent, "interrupt-controller"))
break;
}
iparent = OF_xref_from_node(iparent);
}
return (iparent);
}
int
ofw_bus_intr_to_rl(device_t dev, phandle_t node,
struct resource_list *rl, int *rlen)
@ -442,18 +463,11 @@ ofw_bus_intr_to_rl(device_t dev, phandle_t node,
nintr = OF_getencprop_alloc(node, "interrupts", sizeof(*intr),
(void **)&intr);
if (nintr > 0) {
if (OF_searchencprop(node, "interrupt-parent", &iparent,
sizeof(iparent)) == -1) {
for (iparent = node; iparent != 0;
iparent = OF_parent(iparent)) {
if (OF_hasprop(iparent, "interrupt-controller"))
break;
}
if (iparent == 0) {
device_printf(dev, "No interrupt-parent found, "
"assuming direct parent\n");
iparent = OF_parent(node);
}
iparent = ofw_bus_find_iparent(node);
if (iparent == 0) {
device_printf(dev, "No interrupt-parent found, "
"assuming direct parent\n");
iparent = OF_parent(node);
iparent = OF_xref_from_node(iparent);
}
if (OF_searchencprop(OF_node_from_xref(iparent),

2
sys/dev/ofw/ofw_bus_subr.h
View File

@ -82,7 +82,7 @@ const char *ofw_bus_get_status(device_t dev);
int ofw_bus_status_okay(device_t dev);
/* Helper to get node's interrupt parent */
void ofw_bus_find_iparent(phandle_t);
phandle_t ofw_bus_find_iparent(phandle_t);
/* Helper routine for checking compat prop */
int ofw_bus_is_compatible(device_t, const char *);