From af25f71af9d708a3d801631ca58a647d437260af Mon Sep 17 00:00:00 2001
From: rayu <rayu@rayuu.com>
Date: Fri, 20 Mar 2026 12:22:52 +0800
Subject: [PATCH] =?UTF-8?q?=E2=9C=A8feat(phytium-gpio):=20add=20=20phytium?=
 =?UTF-8?q?=5Fgpio=5Firq=5Frequest=20and=20release=20interface.?=
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---
 drivers/gpio/gpio-phytium-core.c     | 35 ++++++++++++++++++++++++++++
 drivers/gpio/gpio-phytium-core.h     |  2 ++
 drivers/gpio/gpio-phytium-pci.c      |  2 ++
 drivers/gpio/gpio-phytium-platform.c |  2 ++
 4 files changed, 41 insertions(+)

diff --git a/drivers/gpio/gpio-phytium-core.c b/drivers/gpio/gpio-phytium-core.c
index dce2fe46399..b5ee1770f7e 100644
--- a/drivers/gpio/gpio-phytium-core.c
+++ b/drivers/gpio/gpio-phytium-core.c
@@ -259,6 +259,41 @@ int phytium_gpio_irq_set_type(struct irq_data *d, unsigned int flow_type)
 }
 EXPORT_SYMBOL_GPL(phytium_gpio_irq_set_type);
 
+
+int phytium_gpio_irq_request_resources(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	int hwirq = irqd_to_hwirq(d);
+	int dir;
+
+	dir = phytium_gpio_get_direction(gc, hwirq);
+	if (dir < 0){
+		dev_err(gc->parent, "line %d: get direction failed\n", hwirq);
+		return -EINVAL;
+	}
+
+	/* If GPIO is configured as output, switch it to input before
+	 * using it as an interrupt source
+	 */
+	if (dir == GPIO_LINE_DIRECTION_OUT) {
+		dev_warn(gc->parent,
+			 "line %d: GPIO set as output, switching to input for IRQ\n",
+			 hwirq);
+		phytium_gpio_direction_input(gc, hwirq);
+	}
+
+	return gpiochip_reqres_irq(gc, hwirq);
+}
+EXPORT_SYMBOL_GPL(phytium_gpio_irq_request_resources);
+
+void phytium_gpio_irq_release_resources(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+	gpiochip_relres_irq(gc, irqd_to_hwirq(d));
+}
+EXPORT_SYMBOL_GPL(phytium_gpio_irq_release_resources);
+
 void phytium_gpio_irq_enable(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
diff --git a/drivers/gpio/gpio-phytium-core.h b/drivers/gpio/gpio-phytium-core.h
index f16350d3a2b..d0d49ff8d02 100644
--- a/drivers/gpio/gpio-phytium-core.h
+++ b/drivers/gpio/gpio-phytium-core.h
@@ -84,6 +84,8 @@ void phytium_gpio_irq_ack(struct irq_data *d);
 void phytium_gpio_irq_mask(struct irq_data *d);
 void phytium_gpio_irq_unmask(struct irq_data *d);
 int phytium_gpio_irq_set_type(struct irq_data *d, unsigned int flow_type);
+int phytium_gpio_irq_request_resources(struct irq_data *d);
+void phytium_gpio_irq_release_resources(struct irq_data *d);
 void phytium_gpio_irq_enable(struct irq_data *d);
 void phytium_gpio_irq_disable(struct irq_data *d);
 void phytium_gpio_irq_handler(struct irq_desc *desc);
diff --git a/drivers/gpio/gpio-phytium-pci.c b/drivers/gpio/gpio-phytium-pci.c
index 2c7113da04b..e0914d4545e 100644
--- a/drivers/gpio/gpio-phytium-pci.c
+++ b/drivers/gpio/gpio-phytium-pci.c
@@ -62,6 +62,8 @@ static int phytium_gpio_pci_probe(struct pci_dev *pdev, const struct pci_device_
 	gpio->irq_chip.irq_mask = phytium_gpio_irq_mask;
 	gpio->irq_chip.irq_unmask = phytium_gpio_irq_unmask;
 	gpio->irq_chip.irq_set_type = phytium_gpio_irq_set_type;
+	gpio->irq_chip.irq_request_resources = phytium_gpio_irq_request_resources;
+	gpio->irq_chip.irq_release_resources = phytium_gpio_irq_release_resources;
 	gpio->irq_chip.irq_enable = phytium_gpio_irq_enable;
 	gpio->irq_chip.irq_disable = phytium_gpio_irq_disable;
 #ifdef CONFIG_SMP
diff --git a/drivers/gpio/gpio-phytium-platform.c b/drivers/gpio/gpio-phytium-platform.c
index 65fece149ea..5bc575c17c6 100644
--- a/drivers/gpio/gpio-phytium-platform.c
+++ b/drivers/gpio/gpio-phytium-platform.c
@@ -79,6 +79,8 @@ static int phytium_gpio_probe(struct platform_device *pdev)
 	gpio->irq_chip.irq_mask = phytium_gpio_irq_mask;
 	gpio->irq_chip.irq_unmask = phytium_gpio_irq_unmask;
 	gpio->irq_chip.irq_set_type = phytium_gpio_irq_set_type;
+	gpio->irq_chip.irq_request_resources = phytium_gpio_irq_request_resources;
+	gpio->irq_chip.irq_release_resources = phytium_gpio_irq_release_resources;
 	gpio->irq_chip.irq_enable = phytium_gpio_irq_enable;
 	gpio->irq_chip.irq_disable = phytium_gpio_irq_disable;
 #ifdef CONFIG_SMP
-- 
Gitee