On 2020-12-18 21:07, Saravana Kannan wrote:
Add support for creating device links out of interrupts property.
Cc: Marc Zyngier <maz@xxxxxxxxxx>
Cc: Kevin Hilman <khilman@xxxxxxxxxxxx>
Signed-off-by: Saravana Kannan <saravanak@xxxxxxxxxx>
---
Rob/Greg,
This might need to go into driver-core to avoid conflict
due to fw_devlink refactor series that merged there.
Thanks,
Saravana
drivers/of/property.c | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/drivers/of/property.c b/drivers/of/property.c
index 5f9eed79a8aa..e56a5eae0a0b 100644
--- a/drivers/of/property.c
+++ b/drivers/of/property.c
@@ -1271,6 +1271,22 @@ static struct device_node
*parse_iommu_maps(struct device_node *np,
return of_parse_phandle(np, prop_name, (index * 4) + 1);
}
+static struct device_node *parse_interrupts(struct device_node *np,
+ const char *prop_name, int index)
+{
+ struct device_node *sup;
+
+ if (strcmp(prop_name, "interrupts") || index)
+ return NULL;
+
+ of_node_get(np);
+ while (np && !(sup = of_parse_phandle(np, "interrupt-parent", 0)))
+ np = of_get_next_parent(np);
+ of_node_put(np);
+
+ return sup;
+}
+
static const struct supplier_bindings of_supplier_bindings[] = {
{ .parse_prop = parse_clocks, },
{ .parse_prop = parse_interconnects, },
@@ -1296,6 +1312,7 @@ static const struct supplier_bindings
of_supplier_bindings[] = {
{ .parse_prop = parse_pinctrl6, },
{ .parse_prop = parse_pinctrl7, },
{ .parse_prop = parse_pinctrl8, },
+ { .parse_prop = parse_interrupts, },
{ .parse_prop = parse_regulators, },
{ .parse_prop = parse_gpio, },
{ .parse_prop = parse_gpios, },
You don't really describe what this is for so I'm only guessing
from the context. If you want to follow the interrupt hierarchy,
"interrupt-parent" isn't enough. You also need to track
things like interrupt-map, or anything that carries a phandle
to an interrupt controller.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
