[PATCH v1 4/4] gpiolib: Reuse device's fwnode to create IRQ domain

[Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>]

When IRQ domain is created for an ACPI case, the name of it becomes unknown-%d
since for now it utilizes of_node member only and doesn't consider fwnode case.
Convert IRQ domain creation code to utilize fwnode instead.

Before/After the change on Intel Galileo Gen 2 with two GPIO (IRQ) controllers:

  unknown-1	==>	\_SB.PCI0.GIP0.GPO
  unknown-2	==>	\_SB.NIO3

Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
---
 drivers/gpio/gpiolib.c | 32 ++++++++++++--------------------
 1 file changed, 12 insertions(+), 20 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 6827736ba05c..54cfea4e4a03 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -1457,9 +1457,9 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc,
 				struct lock_class_key *lock_key,
 				struct lock_class_key *request_key)
 {
+	struct fwnode_handle *fwnode = dev_fwnode(&gc->gpiodev->dev);
 	struct irq_chip *irqchip = gc->irq.chip;
-	const struct irq_domain_ops *ops = NULL;
-	struct device_node *np;
+	const struct irq_domain_ops *ops;
 	unsigned int type;
 	unsigned int i;
 
@@ -1471,7 +1471,6 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc,
 		return -EINVAL;
 	}
 
-	np = gc->gpiodev->dev.of_node;
 	type = gc->irq.default_type;
 
 	/*
@@ -1479,16 +1478,10 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc,
 	 * used to configure the interrupts, as you may end up with
 	 * conflicting triggers. Tell the user, and reset to NONE.
 	 */
-	if (WARN(np && type != IRQ_TYPE_NONE,
-		 "%s: Ignoring %u default trigger\n", np->full_name, type))
+	if (WARN(fwnode && type != IRQ_TYPE_NONE,
+		 "%pfw: Ignoring %u default trigger\n", fwnode, type))
 		type = IRQ_TYPE_NONE;
 
-	if (has_acpi_companion(gc->parent) && type != IRQ_TYPE_NONE) {
-		acpi_handle_warn(ACPI_HANDLE(gc->parent),
-				 "Ignoring %u default trigger\n", type);
-		type = IRQ_TYPE_NONE;
-	}
-
 	if (gc->to_irq)
 		chip_warn(gc, "to_irq is redefined in %s and you shouldn't rely on it\n", __func__);
 
@@ -1504,15 +1497,14 @@ static int gpiochip_add_irqchip(struct gpio_chip *gc,
 			return ret;
 	} else {
 		/* Some drivers provide custom irqdomain ops */
-		if (gc->irq.domain_ops)
-			ops = gc->irq.domain_ops;
-
-		if (!ops)
-			ops = &gpiochip_domain_ops;
-		gc->irq.domain = irq_domain_add_simple(np,
-			gc->ngpio,
-			gc->irq.first,
-			ops, gc);
+		ops = gc->irq.domain_ops ?: &gpiochip_domain_ops;
+		if (gc->irq.first)
+			gc->irq.domain = irq_domain_create_legacy(fwnode, gc->ngpio,
+								  gc->irq.first, 0,
+								  ops, gc);
+		else
+			gc->irq.domain = irq_domain_create_linear(fwnode, gc->ngpio,
+								  ops, gc);
 		if (!gc->irq.domain)
 			return -EINVAL;
 	}
-- 
2.30.1