gpio: bcm-kona: Make driver OF-independent

There is nothing in the driver that requires OF APIs,
make the driver OF independent.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

drivers/gpio/Kconfig

@@ -191,7 +191,7 @@ config GPIO_RASPBERRYPI_EXP
 
 config GPIO_BCM_KONA
 	bool "Broadcom Kona GPIO"
-	depends on OF_GPIO && (ARCH_BCM_MOBILE || COMPILE_TEST)
+	depends on ARCH_BCM_MOBILE || COMPILE_TEST
 	help
 	  Turn on GPIO support for Broadcom "Kona" chips.
 

drivers/gpio/gpio-bcm-kona.c

@@ -8,12 +8,14 @@
 
 #include <linux/bitops.h>
 #include <linux/err.h>
-#include <linux/io.h>
 #include <linux/gpio/driver.h>
-#include <linux/of_device.h>
 #include <linux/init.h>
+#include <linux/io.h>
 #include <linux/irqdomain.h>
 #include <linux/irqchip/chained_irq.h>
+#include <linux/mod_devicetable.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
 
 #define BCM_GPIO_PASSWD				0x00a5a501
 #define GPIO_PER_BANK				32
@@ -556,19 +558,12 @@ static void bcm_kona_gpio_reset(struct bcm_kona_gpio *kona_gpio)
 static int bcm_kona_gpio_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	const struct of_device_id *match;
 	struct bcm_kona_gpio_bank *bank;
 	struct bcm_kona_gpio *kona_gpio;
 	struct gpio_chip *chip;
 	int ret;
 	int i;
 
-	match = of_match_device(bcm_kona_gpio_of_match, dev);
-	if (!match) {
-		dev_err(dev, "Failed to find gpio controller\n");
-		return -ENODEV;
-	}
-
 	kona_gpio = devm_kzalloc(dev, sizeof(*kona_gpio), GFP_KERNEL);
 	if (!kona_gpio)
 		return -ENOMEM;
@@ -601,10 +596,10 @@ static int bcm_kona_gpio_probe(struct platform_device *pdev)
 	chip->parent = dev;
 	chip->ngpio = kona_gpio->num_bank * GPIO_PER_BANK;
 
-	kona_gpio->irq_domain = irq_domain_add_linear(dev->of_node,
-						      chip->ngpio,
-						      &bcm_kona_irq_ops,
-						      kona_gpio);
+	kona_gpio->irq_domain = irq_domain_create_linear(dev_fwnode(dev),
+							 chip->ngpio,
+							 &bcm_kona_irq_ops,
+							 kona_gpio);
 	if (!kona_gpio->irq_domain) {
 		dev_err(dev, "Couldn't allocate IRQ domain\n");
 		return -ENXIO;