irqchip/irq-vt8500: Don't require 8 interrupts from a chained controller

VT8500 chained controller can route its interrupts to either or all
of its 8 interrupt outputs. Current code actually routes all of them
to the first output, so there is no need to create mappings for all
eight.

Drop redundant checks, and only map as many chained controller
interrupts as are defined in the device tree.

Signed-off-by: Alexey Charkov <alchark@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250506-vt8500-intc-updates-v2-3-a3a0606cf92d@gmail.com

diff --git a/drivers/irqchip/irq-vt8500.c b/drivers/irqchip/irq-vt8500.c
index c88aa6484afbaab3c5d1edf0c2e1fbfeae6994d9..debca897c1ee37031b5855afc4664dcdcd9be3c6 100644 (file)
--- a/drivers/irqchip/irq-vt8500.c
+++ b/drivers/irqchip/irq-vt8500.c
@@ -220,16 +220,9 @@ static int __init vt8500_irq_init(struct device_node *node,
 
        active_cnt++;
 
-       /* check if this is a slaved controller */
+       /* check if this is a chained controller */
        if (of_irq_count(node) != 0) {
-               /* check that we have the correct number of interrupts */
-               if (of_irq_count(node) != 8) {
-                       pr_err("%s: Incorrect IRQ map for slaved controller\n",
-                                       __func__);
-                       return -EINVAL;
-               }
-
-               for (i = 0; i < 8; i++) {
+               for (i = 0; i < of_irq_count(node); i++) {
                        irq = irq_of_parse_and_map(node, i);
                        enable_irq(irq);
                }