Am 2020-04-27 13:42, schrieb Thomas Gleixner:
Michael Walle <michael@xxxxxxxx> writes:
This connects an IRQ domain to a gpiochip and reuses
gpiochip_to_irq().
A little bit more context and explanation why this function is useful
would be appreciated.
Ok I'll try to be a bit more elaborate the in the next version, (if
this function is still there).
For now:
gpiochip_irqchip_add_domain() allows to use reqmap-irq, which exports
an irqdomain, with gpiolib while reusing gpiochip_to_irq(). Both
gpiochip_irqchip_* and regmap_irq partially provides the same
functionality. The new 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@xxxxxxxx>
---
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 40f2d7f69be2..7b3d7f496b9a 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -2722,6 +2722,26 @@ int gpiochip_irqchip_add_key(struct gpio_chip
*gc,
}
EXPORT_SYMBOL_GPL(gpiochip_irqchip_add_key);
+/**
+ * gpiochip_irqchip_add_key() - adds an irqdomain to a gpiochip
Copy & paste is wonderful
whoops.
-michael
+ * @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;
+}
Thanks,
tglx
