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-rw-r--r--include/linux/gpio/driver.h48
1 files changed, 48 insertions, 0 deletions
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index a3e181e09636..1827b43966d9 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -3,6 +3,9 @@
#include <linux/types.h>
#include <linux/module.h>
+#include <linux/irq.h>
+#include <linux/irqchip/chained_irq.h>
+#include <linux/irqdomain.h>
struct device;
struct gpio_desc;
@@ -10,6 +13,8 @@ struct of_phandle_args;
struct device_node;
struct seq_file;
+#ifdef CONFIG_GPIOLIB
+
/**
* struct gpio_chip - abstract a GPIO controller
* @label: for diagnostics
@@ -95,6 +100,18 @@ struct gpio_chip {
bool can_sleep;
bool exported;
+#ifdef CONFIG_GPIOLIB_IRQCHIP
+ /*
+ * With CONFIG_GPIO_IRQCHIP we get an irqchip inside the gpiolib
+ * to handle IRQs for most practical cases.
+ */
+ struct irq_chip *irqchip;
+ struct irq_domain *irqdomain;
+ unsigned int irq_base;
+ irq_flow_handler_t irq_handler;
+ unsigned int irq_default_type;
+#endif
+
#if defined(CONFIG_OF_GPIO)
/*
* If CONFIG_OF is enabled, then all GPIO controllers described in the
@@ -129,6 +146,11 @@ extern struct gpio_chip *gpiochip_find(void *data,
int gpiod_lock_as_irq(struct gpio_desc *desc);
void gpiod_unlock_as_irq(struct gpio_desc *desc);
+struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);
+
+struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip,
+ u16 hwnum);
+
enum gpio_lookup_flags {
GPIO_ACTIVE_HIGH = (0 << 0),
GPIO_ACTIVE_LOW = (1 << 0),
@@ -183,4 +205,30 @@ struct gpiod_lookup_table {
void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
+#ifdef CONFIG_GPIOLIB_IRQCHIP
+
+void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ int parent_irq,
+ irq_flow_handler_t parent_handler);
+
+int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
+ struct irq_chip *irqchip,
+ unsigned int first_irq,
+ irq_flow_handler_t handler,
+ unsigned int type);
+
+#endif /* CONFIG_GPIO_IRQCHIP */
+
+#else /* CONFIG_GPIOLIB */
+
+static inline struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc)
+{
+ /* GPIO can never have been requested */
+ WARN_ON(1);
+ return ERR_PTR(-ENODEV);
+}
+
+#endif /* CONFIG_GPIOLIB */
+
#endif