Re: [PATCH v3 09/16] gpiolib: Introduce gpiochip_irqchip_add_domain()

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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



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