[PATCH v1 6/9] Revert "irqchip/sifive-plic: Use riscv_get_intc_hwnode() to get parent fwnode"

[Emil Renner Berthing]

This reverts commit 6c725f33d67b53f2d302c2c4509deae953fc6ade.

This is a prerequisite to reverting the patch converting the PLIC into a
platform driver. Unfortunately this breaks booting the Allwinner D1 SoC.

Fixes: 8ec99b033147 ("irqchip/sifive-plic: Convert PLIC driver into a platform driver")
Signed-off-by: Emil Renner Berthing <emil.renner.berthing at canonical.com>
---
 drivers/irqchip/irq-sifive-plic.c | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/drivers/irqchip/irq-sifive-plic.c b/drivers/irqchip/irq-sifive-plic.c
index 85e94b8f4c06..7dbc662a229c 100644
--- a/drivers/irqchip/irq-sifive-plic.c
+++ b/drivers/irqchip/irq-sifive-plic.c
@@ -429,7 +429,6 @@ static int plic_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	unsigned long plic_quirks = 0;
 	struct plic_handler *handler;
-	struct irq_domain *domain;
 	struct plic_priv *priv;
 	bool cpuhp_setup;
 	unsigned int cpu;
@@ -509,11 +508,11 @@ static int plic_probe(struct platform_device *pdev)
 		}
 
 		/* Find parent domain and register chained handler */
-		domain = irq_find_matching_fwnode(riscv_get_intc_hwnode(), DOMAIN_BUS_ANY);
-		if (!plic_parent_irq && domain) {
-			plic_parent_irq = irq_create_mapping(domain, RV_IRQ_EXT);
+		if (!plic_parent_irq && irq_find_host(parent.np)) {
+			plic_parent_irq = irq_of_parse_and_map(to_of_node(dev->fwnode), i);
 			if (plic_parent_irq)
-				irq_set_chained_handler(plic_parent_irq, plic_handle_irq);
+				irq_set_chained_handler(plic_parent_irq,
+							plic_handle_irq);
 		}
 
 		/*
-- 
2.43.0