gpio: bcm-kona: use platform_irq_count

platform_irq_count() is the more generic way (independent of
device trees) to determine the count of available interrupts. So
use this instead.

As platform_irq_count() might return an error code (which
of_irq_count doesn't) some additional handling is necessary.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

diff --git a/drivers/gpio/gpio-bcm-kona.c b/drivers/gpio/gpio-bcm-kona.c
index 4122683..baee8c3 100644 (file)
--- a/drivers/gpio/gpio-bcm-kona.c
+++ b/drivers/gpio/gpio-bcm-kona.c
@@ -19,7 +19,6 @@
 #include <linux/io.h>
 #include <linux/gpio/driver.h>
 #include <linux/of_device.h>
-#include <linux/of_irq.h>
 #include <linux/init.h>
 #include <linux/irqdomain.h>
 #include <linux/irqchip/chained_irq.h>
@@ -586,11 +585,18 @@ static int bcm_kona_gpio_probe(struct platform_device *pdev)
 
        kona_gpio->gpio_chip = template_chip;
        chip = &kona_gpio->gpio_chip;
-       kona_gpio->num_bank = of_irq_count(dev->of_node);
-       if (kona_gpio->num_bank == 0) {
+       ret = platform_irq_count(pdev);
+       if (!ret) {
                dev_err(dev, "Couldn't determine # GPIO banks\n");
                return -ENOENT;
+       } else if (ret < 0) {
+               if (ret != -EPROBE_DEFER)
+                       dev_err(dev, "Couldn't determine GPIO banks: (%pe)\n",
+                               ERR_PTR(ret));
+               return ret;
        }
+       kona_gpio->num_bank = ret;
+
        if (kona_gpio->num_bank > GPIO_MAX_BANK_NUM) {
                dev_err(dev, "Too many GPIO banks configured (max=%d)\n",
                        GPIO_MAX_BANK_NUM);