irqchip/mvebu-odmi: Use irq_domain_create_hierarchy()

Use the irq_domain_create_hierarchy() helper to create the hierarchical
domain, which both serves as documentation and avoids poking at
irqdomain internals.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Hsin-Yi Wang <hsinyi@chromium.org>
Tested-by: Mark-PK Tsai <mark-pk.tsai@mediatek.com>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230213104302.17307-20-johan+linaro@kernel.org

diff --git a/drivers/irqchip/irq-mvebu-odmi.c b/drivers/irqchip/irq-mvebu-odmi.c
index dc4145a..1080915 100644 (file)
--- a/drivers/irqchip/irq-mvebu-odmi.c
+++ b/drivers/irqchip/irq-mvebu-odmi.c
@@ -161,7 +161,7 @@ static struct msi_domain_info odmi_msi_domain_info = {
 static int __init mvebu_odmi_init(struct device_node *node,
                                  struct device_node *parent)
 {
-       struct irq_domain *inner_domain, *plat_domain;
+       struct irq_domain *parent_domain, *inner_domain, *plat_domain;
        int ret, i;
 
        if (of_property_read_u32(node, "marvell,odmi-frames", &odmis_count))
@@ -197,16 +197,17 @@ static int __init mvebu_odmi_init(struct device_node *node,
                }
        }
 
-       inner_domain = irq_domain_create_linear(of_node_to_fwnode(node),
-                                               odmis_count * NODMIS_PER_FRAME,
-                                               &odmi_domain_ops, NULL);
+       parent_domain = irq_find_host(parent);
+
+       inner_domain = irq_domain_create_hierarchy(parent_domain, 0,
+                                                  odmis_count * NODMIS_PER_FRAME,
+                                                  of_node_to_fwnode(node),
+                                                  &odmi_domain_ops, NULL);
        if (!inner_domain) {
                ret = -ENOMEM;
                goto err_unmap;
        }
 
-       inner_domain->parent = irq_find_host(parent);
-
        plat_domain = platform_msi_create_irq_domain(of_node_to_fwnode(node),
                                                     &odmi_msi_domain_info,
                                                     inner_domain);