[PATCH v3 02/11] of/irq: Set FWNODE_FLAG_BEST_EFFORT for the interrupt controller DT nodes

[Anup Patel <apatel@ventanamicro.com>]

The RISC-V APLIC interrupt controller driver is a regular platform
driver so we need to ensure that it is probed as soon as possible.
To achieve this, we mark the interrupt controller device nodes with
FWNODE_FLAG_BEST_EFFORT (just like console DT node).

Fixes: 8f486cab263c ("driver core: fw_devlink: Allow firmware to mark devices as best effort")
Signed-off-by: Anup Patel <apatel@ventanamicro.com>
---
 drivers/of/irq.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/of/irq.c b/drivers/of/irq.c
index 174900072c18..94e1d9245cff 100644
--- a/drivers/of/irq.c
+++ b/drivers/of/irq.c
@@ -535,6 +535,16 @@ void __init of_irq_init(const struct of_device_id *matches)
 	INIT_LIST_HEAD(&intc_desc_list);
 	INIT_LIST_HEAD(&intc_parent_list);
 
+	/*
+	 * We need interrupt controller platform drivers to work as soon
+	 * as possible so mark the interrupt controller device nodes with
+	 * FWNODE_FLAG_BEST_EFFORT so that fw_delink knows not to delay
+	 * the probe of the interrupt controller device for suppliers
+	 * without drivers.
+	 */
+	for_each_node_with_property(np, "interrupt-controller")
+		np->fwnode.flags |= FWNODE_FLAG_BEST_EFFORT;
+
 	for_each_matching_node_and_match(np, matches, &match) {
 		if (!of_property_read_bool(np, "interrupt-controller") ||
 				!of_device_is_available(np))
-- 
2.34.1