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-rw-r--r--drivers/of/property.c52
1 files changed, 52 insertions, 0 deletions
diff --git a/drivers/of/property.c b/drivers/of/property.c
index 8d2477ff8930..21f59e3cd6aa 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -1301,6 +1301,57 @@ static struct device_node *parse_interrupts(struct device_node *np,
return of_irq_parse_one(np, index, &sup_args) ? NULL : sup_args.np;
}
+static struct device_node *parse_interrupt_map(struct device_node *np,
+ const char *prop_name, int index)
+{
+ const __be32 *imap, *imap_end, *addr;
+ struct of_phandle_args sup_args;
+ u32 addrcells, intcells;
+ int i, imaplen;
+
+ if (!IS_ENABLED(CONFIG_OF_IRQ))
+ return NULL;
+
+ if (strcmp(prop_name, "interrupt-map"))
+ return NULL;
+
+ if (of_property_read_u32(np, "#interrupt-cells", &intcells))
+ return NULL;
+ addrcells = of_bus_n_addr_cells(np);
+
+ imap = of_get_property(np, "interrupt-map", &imaplen);
+ if (!imap || imaplen <= (addrcells + intcells))
+ return NULL;
+ imap_end = imap + imaplen;
+
+ while (imap < imap_end) {
+ addr = imap;
+ imap += addrcells;
+
+ sup_args.np = np;
+ sup_args.args_count = intcells;
+ for (i = 0; i < intcells; i++)
+ sup_args.args[i] = be32_to_cpu(imap[i]);
+ imap += intcells;
+
+ /*
+ * Upon success, the function of_irq_parse_raw() returns
+ * interrupt controller DT node pointer in sup_args.np.
+ */
+ if (of_irq_parse_raw(addr, &sup_args))
+ return NULL;
+
+ if (!index)
+ return sup_args.np;
+
+ of_node_put(sup_args.np);
+ imap += sup_args.args_count + 1;
+ index--;
+ }
+
+ return NULL;
+}
+
static struct device_node *parse_remote_endpoint(struct device_node *np,
const char *prop_name,
int index)
@@ -1350,6 +1401,7 @@ static const struct supplier_bindings of_supplier_bindings[] = {
{ .parse_prop = parse_power_supplies, },
{ .parse_prop = parse_gpio_compat, },
{ .parse_prop = parse_interrupts, },
+ { .parse_prop = parse_interrupt_map, },
{ .parse_prop = parse_regulators, },
{ .parse_prop = parse_gpio, },
{ .parse_prop = parse_gpios, },