[PATCH 4/7] irqchip/stm32-exti: forward irq_request_resources to parent

[Antonio Borneo]

From: Pascal Paillet <p.paillet at foss.st.com>

Enhance stm32-exti driver to forward request_resources and
release_resources_parent operations to parent.
Do not use irq_request_resources_parent because it returns
an error when the parent does not implement irq_request_resources.

Signed-off-by: Pascal Paillet <p.paillet at foss.st.com>
Signed-off-by: Antonio Borneo <antonio.borneo at foss.st.com>
---
 drivers/irqchip/irq-stm32-exti.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/irqchip/irq-stm32-exti.c b/drivers/irqchip/irq-stm32-exti.c
index c8003f4f0457..3f6d524a87fe 100644
--- a/drivers/irqchip/irq-stm32-exti.c
+++ b/drivers/irqchip/irq-stm32-exti.c
@@ -550,6 +550,16 @@ static void stm32_exti_h_unmask(struct irq_data *d)
 		irq_chip_unmask_parent(d);
 }
 
+static int stm32_exti_h_request_resources(struct irq_data *data)
+{
+	data = data->parent_data;
+
+	if (data->chip->irq_request_resources)
+		return data->chip->irq_request_resources(data);
+
+	return 0;
+}
+
 static int stm32_exti_h_set_type(struct irq_data *d, unsigned int type)
 {
 	struct stm32_exti_chip_data *chip_data = irq_data_get_irq_chip_data(d);
@@ -677,6 +687,8 @@ static struct irq_chip stm32_exti_h_chip = {
 	.irq_eoi		= stm32_exti_h_eoi,
 	.irq_mask		= stm32_exti_h_mask,
 	.irq_unmask		= stm32_exti_h_unmask,
+	.irq_request_resources	= stm32_exti_h_request_resources,
+	.irq_release_resources	= irq_chip_release_resources_parent,
 	.irq_retrigger		= stm32_exti_h_retrigger,
 	.irq_set_type		= stm32_exti_h_set_type,
 	.irq_set_wake		= stm32_exti_h_set_wake,
@@ -690,6 +702,8 @@ static struct irq_chip stm32_exti_h_chip_direct = {
 	.irq_ack		= irq_chip_ack_parent,
 	.irq_mask		= stm32_exti_h_mask,
 	.irq_unmask		= stm32_exti_h_unmask,
+	.irq_request_resources	= stm32_exti_h_request_resources,
+	.irq_release_resources	= irq_chip_release_resources_parent,
 	.irq_retrigger		= irq_chip_retrigger_hierarchy,
 	.irq_set_type		= irq_chip_set_type_parent,
 	.irq_set_wake		= stm32_exti_h_set_wake,
-- 
2.36.0