pinctrl: cherryview: Allocate IRQ chip dynamic

Keeping the IRQ chip definition static shares it with multiple instances
of the GPIO chip in the system. This is bad and now we get this warning
from GPIO library:

"detected irqchip that is shared with multiple gpiochips: please fix the driver."

Hence, move the IRQ chip definition from being driver static into the struct
intel_pinctrl. So a unique IRQ chip is used for each GPIO chip instance.

This patch is heavily based on the attachment to the bug by Christoph Marz.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=202543
Fixes: 6e08d6bb ("pinctrl: Add Intel Cherryview/Braswell pin controller support")
Depends-on: 83b9dc11 ("pinctrl: cherryview: Associate IRQ descriptors to irqdomain")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>

drivers/pinctrl/intel/pinctrl-cherryview.c

@@ -147,6 +147,7 @@ struct chv_pin_context {
  * @pctldesc: Pin controller description
  * @pctldev: Pointer to the pin controller device
  * @chip: GPIO chip in this pin controller
+ * @irqchip: IRQ chip in this pin controller
  * @regs: MMIO registers
  * @intr_lines: Stores mapping between 16 HW interrupt wires and GPIO
  *		offset (in GPIO number space)
@@ -162,6 +163,7 @@ struct chv_pinctrl {
 	struct pinctrl_desc pctldesc;
 	struct pinctrl_dev *pctldev;
 	struct gpio_chip chip;
+	struct irq_chip irqchip;
 	void __iomem *regs;
 	unsigned intr_lines[16];
 	const struct chv_community *community;
@@ -1466,16 +1468,6 @@ static int chv_gpio_irq_type(struct irq_data *d, unsigned int type)
 	return 0;
 }
 
-static struct irq_chip chv_gpio_irqchip = {
-	.name = "chv-gpio",
-	.irq_startup = chv_gpio_irq_startup,
-	.irq_ack = chv_gpio_irq_ack,
-	.irq_mask = chv_gpio_irq_mask,
-	.irq_unmask = chv_gpio_irq_unmask,
-	.irq_set_type = chv_gpio_irq_type,
-	.flags = IRQCHIP_SKIP_SET_WAKE,
-};
-
 static void chv_gpio_irq_handler(struct irq_desc *desc)
 {
 	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
@@ -1625,7 +1617,15 @@ static int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq)
 		}
 	}
 
-	ret = gpiochip_irqchip_add(chip, &chv_gpio_irqchip, 0,
+	pctrl->irqchip.name = "chv-gpio";
+	pctrl->irqchip.irq_startup = chv_gpio_irq_startup;
+	pctrl->irqchip.irq_ack = chv_gpio_irq_ack;
+	pctrl->irqchip.irq_mask = chv_gpio_irq_mask;
+	pctrl->irqchip.irq_unmask = chv_gpio_irq_unmask;
+	pctrl->irqchip.irq_set_type = chv_gpio_irq_type;
+	pctrl->irqchip.flags = IRQCHIP_SKIP_SET_WAKE;
+
+	ret = gpiochip_irqchip_add(chip, &pctrl->irqchip, 0,
 				   handle_bad_irq, IRQ_TYPE_NONE);
 	if (ret) {
 		dev_err(pctrl->dev, "failed to add IRQ chip\n");
@@ -1642,7 +1642,7 @@ static int chv_gpio_probe(struct chv_pinctrl *pctrl, int irq)
 		}
 	}
 
-	gpiochip_set_chained_irqchip(chip, &chv_gpio_irqchip, irq,
+	gpiochip_set_chained_irqchip(chip, &pctrl->irqchip, irq,
 				     chv_gpio_irq_handler);
 	return 0;
 }