pinctrl: at91: don't use the same irqchip with multiple gpiochips

Sharing the same irqchip with multiple gpiochips is not a good
practice. For instance, when installing hooks, we change the state
of the irqchip. The initial state of the irqchip for the second
gpiochip to register is then disrupted.

Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

1 files changed, 14 insertions, 14 deletions

diff --git a/drivers/pinctrl/pinctrl-at91.c b/drivers/pinctrl/pinctrl-at91.c
index cfd8239f2727..911ea0fe2a41 100644
--- a/drivers/pinctrl/pinctrl-at91.c
+++ b/drivers/pinctrl/pinctrl-at91.c
@@ -1574,16 +1574,6 @@ void at91_pinctrl_gpio_resume(void)
 #define gpio_irq_set_wake       NULL
 #endif /* CONFIG_PM */
 
-static struct irq_chip gpio_irqchip = {
-        .name           = "GPIO",
-        .irq_ack        = gpio_irq_ack,
-        .irq_disable    = gpio_irq_mask,
-        .irq_mask       = gpio_irq_mask,
-        .irq_unmask     = gpio_irq_unmask,
-        /* .irq_set_type is set dynamically */
-        .irq_set_wake   = gpio_irq_set_wake,
-};
-
 static void gpio_irq_handler(struct irq_desc *desc)
 {
         struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -1624,12 +1614,22 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev,
         struct gpio_chip        *gpiochip_prev = NULL;
         struct at91_gpio_chip   *prev = NULL;
         struct irq_data         *d = irq_get_irq_data(at91_gpio->pioc_virq);
+        struct irq_chip         *gpio_irqchip;
         int ret, i;
 
+        gpio_irqchip = devm_kzalloc(&pdev->dev, sizeof(*gpio_irqchip), GFP_KERNEL);
+        if (!gpio_irqchip)
+                return -ENOMEM;
+
         at91_gpio->pioc_hwirq = irqd_to_hwirq(d);
 
-        /* Setup proper .irq_set_type function */
-        gpio_irqchip.irq_set_type = at91_gpio->ops->irq_type;
+        gpio_irqchip->name = "GPIO";
+        gpio_irqchip->irq_ack = gpio_irq_ack;
+        gpio_irqchip->irq_disable = gpio_irq_mask;
+        gpio_irqchip->irq_mask = gpio_irq_mask;
+        gpio_irqchip->irq_unmask = gpio_irq_unmask;
+        gpio_irqchip->irq_set_wake = gpio_irq_set_wake,
+        gpio_irqchip->irq_set_type = at91_gpio->ops->irq_type;
 
         /* Disable irqs of this PIO controller */
         writel_relaxed(~0, at91_gpio->regbase + PIO_IDR);
@@ -1640,7 +1640,7 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev,
          * interrupt.
          */
         ret = gpiochip_irqchip_add(&at91_gpio->chip,
-                                   &gpio_irqchip,
+                                   gpio_irqchip,
                                    0,
                                    handle_edge_irq,
                                    IRQ_TYPE_NONE);
@@ -1658,7 +1658,7 @@ static int at91_gpio_of_irq_setup(struct platform_device *pdev,
         if (!gpiochip_prev) {
                 /* Then register the chain on the parent IRQ */
                 gpiochip_set_chained_irqchip(&at91_gpio->chip,
-                                             &gpio_irqchip,
+                                             gpio_irqchip,
                                              at91_gpio->pioc_virq,
                                              gpio_irq_handler);
                 return 0;