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Subject[PATCH 4/7] irqchip/stm32-exti: forward irq_request_resources to parent
Date
From: Pascal Paillet <p.paillet@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@foss.st.com>
Signed-off-by: Antonio Borneo <antonio.borneo@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
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