diff --git a/drivers/mailbox/rockchip-mailbox.c b/drivers/mailbox/rockchip-mailbox.c
index 4d966cb2e..31c5a693f 100644
--- a/drivers/mailbox/rockchip-mailbox.c
+++ b/drivers/mailbox/rockchip-mailbox.c
@@ -155,7 +155,20 @@ static const struct rockchip_mbox_data rk3368_drv_data = {
 	.num_chans = 4,
 };
 
+/*
+ * RV1106's mailbox IP is register-identical to rk3368's, but the SoC wires a
+ * single shared interrupt (GIC_SPI 1) rather than one IRQ per channel. The
+ * per-channel-IRQ probe loop below would fail requesting IRQ index 1, so
+ * declare a single channel (channel 0) — which is all the A7<->HPMCU doorbell
+ * needs. (Matched ahead of the rk3368 fallback via the more-specific
+ * "rockchip,rv1106-mailbox" compatible the DT node also carries.)
+ */
+static const struct rockchip_mbox_data rv1106_drv_data = {
+	.num_chans = 1,
+};
+
 static const struct of_device_id rockchip_mbox_of_match[] = {
+	{ .compatible = "rockchip,rv1106-mailbox", .data = &rv1106_drv_data},
 	{ .compatible = "rockchip,rk3368-mailbox", .data = &rk3368_drv_data},
 	{ },
 };