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Subject[PATCH v5 1/2] gpiolib: Introduce gpiochip_irqchip_add_domain()
Date
The function connects an IRQ domain to a gpiochip and reuses
gpiochip_to_irq() which is provided by gpiolib.

gpiochip_irqchip_* and regmap_irq partially provide the same
functionality. This function will help to connect just the
minimal functionality of the gpiochip_irqchip which is needed to
work together with regmap-irq.

Signed-off-by: Michael Walle <michael@walle.cc>
---
drivers/gpio/gpiolib.c | 20 ++++++++++++++++++++
include/linux/gpio/driver.h | 3 +++
2 files changed, 23 insertions(+)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index eaa0e209188d..d07f763c9c0b 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -2756,6 +2756,26 @@ int gpiochip_irqchip_add_key(struct gpio_chip *gc,
}
EXPORT_SYMBOL_GPL(gpiochip_irqchip_add_key);

+/**
+ * gpiochip_irqchip_add_domain() - adds an irqdomain to a gpiochip
+ * @gc: the gpiochip to add the irqchip to
+ * @domain: the irqdomain to add to the gpiochip
+ *
+ * This function adds an IRQ domain to the gpiochip.
+ */
+int gpiochip_irqchip_add_domain(struct gpio_chip *gc,
+ struct irq_domain *domain)
+{
+ if (!domain)
+ return -EINVAL;
+
+ gc->to_irq = gpiochip_to_irq;
+ gc->irq.domain = domain;
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(gpiochip_irqchip_add_domain);
+
#else /* CONFIG_GPIOLIB_IRQCHIP */

static inline int gpiochip_add_irqchip(struct gpio_chip *gc,
diff --git a/include/linux/gpio/driver.h b/include/linux/gpio/driver.h
index 8c41ae41b6bb..ee30065b6f61 100644
--- a/include/linux/gpio/driver.h
+++ b/include/linux/gpio/driver.h
@@ -599,6 +599,9 @@ int gpiochip_irqchip_add_key(struct gpio_chip *gc,
bool gpiochip_irqchip_irq_valid(const struct gpio_chip *gc,
unsigned int offset);

+int gpiochip_irqchip_add_domain(struct gpio_chip *gc,
+ struct irq_domain *domain);
+
#ifdef CONFIG_LOCKDEP

/*
--
2.20.1
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