gpio: dwapb: convert device node to fwnode

This patch converts device node to fwnode for dwapb driver, so
as to provide a unified fwnode for DT and ACPI bindings.

Tested-by: Alan Tull <[e-mail]>
Acked-by: Andy Shevchenko <[e-mail]>
Signed-off-by: Jiang Qiu <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpio-dwapb.c

···
 #include <linux/of_address.h>
 #include <linux/of_irq.h>
 #include <linux/platform_device.h>
+#include <linux/property.h>
 #include <linux/spinlock.h>
 #include <linux/platform_data/gpio-dwapb.h>
 #include <linux/slab.h>
···
 				 struct dwapb_port_property *pp)
 {
 	struct gpio_chip *gc = &port->gc;
-	struct device_node *node = pp->node;
+	struct fwnode_handle  *fwnode = pp->fwnode;
 	struct irq_chip_generic	*irq_gc = NULL;
 	unsigned int hwirq, ngpio = gc->ngpio;
 	struct irq_chip_type *ct;
 	int err, i;
 
-	gpio->domain = irq_domain_add_linear(node, ngpio,
-					     &irq_generic_chip_ops, gpio);
+	gpio->domain = irq_domain_create_linear(fwnode, ngpio,
+						 &irq_generic_chip_ops, gpio);
 	if (!gpio->domain)
 		return;
 
···
 	}
 
 #ifdef CONFIG_OF_GPIO
-	port->gc.of_node = pp->node;
+	port->gc.of_node = to_of_node(pp->fwnode);
 #endif
 	port->gc.ngpio = pp->ngpio;
 	port->gc.base = pp->gpio_base;
···
 }
 
 static struct dwapb_platform_data *
-dwapb_gpio_get_pdata_of(struct device *dev)
+dwapb_gpio_get_pdata(struct device *dev)
 {
-	struct device_node *node, *port_np;
+	struct fwnode_handle *fwnode;
 	struct dwapb_platform_data *pdata;
 	struct dwapb_port_property *pp;
 	int nports;
 	int i;
 
-	node = dev->of_node;
-	if (!IS_ENABLED(CONFIG_OF_GPIO) || !node)
-		return ERR_PTR(-ENODEV);
-
-	nports = of_get_child_count(node);
+	nports = device_get_child_node_count(dev);
 	if (nports == 0)
 		return ERR_PTR(-ENODEV);
 
···
 	pdata->nports = nports;
 
 	i = 0;
-	for_each_child_of_node(node, port_np) {
+	device_for_each_child_node(dev, fwnode)  {
 		pp = &pdata->properties[i++];
-		pp->node = port_np;
+		pp->fwnode = fwnode;
 
-		if (of_property_read_u32(port_np, "reg", &pp->idx) ||
+		if (fwnode_property_read_u32(fwnode, "reg", &pp->idx) ||
 		    pp->idx >= DWAPB_MAX_PORTS) {
 			dev_err(dev,
 				"missing/invalid port index for port%d\n", i);
 			return ERR_PTR(-EINVAL);
 		}
 
-		if (of_property_read_u32(port_np, "snps,nr-gpios",
+		if (fwnode_property_read_u32(fwnode, "snps,nr-gpios",
 					 &pp->ngpio)) {
 			dev_info(dev,
 				 "failed to get number of gpios for port%d\n",
···
 		 * Only port A can provide interrupts in all configurations of
 		 * the IP.
 		 */
-		if (pp->idx == 0 &&
-		    of_property_read_bool(port_np, "interrupt-controller")) {
-			pp->irq = irq_of_parse_and_map(port_np, 0);
+		if (dev->of_node && pp->idx == 0 &&
+			fwnode_property_read_bool(fwnode,
+						  "interrupt-controller")) {
+			pp->irq = irq_of_parse_and_map(to_of_node(fwnode), 0);
 			if (!pp->irq)
 				dev_warn(dev, "no irq for port%d\n", pp->idx);
 		}
···
 	struct dwapb_platform_data *pdata = dev_get_platdata(dev);
 
 	if (!pdata) {
-		pdata = dwapb_gpio_get_pdata_of(dev);
+		pdata = dwapb_gpio_get_pdata(dev);
 		if (IS_ERR(pdata))
 			return PTR_ERR(pdata);
 	}

drivers/mfd/intel_quark_i2c_gpio.c

···
 		return -ENOMEM;
 
 	/* Set the properties for portA */
-	pdata->properties->node		= NULL;
+	pdata->properties->fwnode	= NULL;
 	pdata->properties->idx		= 0;
 	pdata->properties->ngpio	= INTEL_QUARK_MFD_NGPIO;
 	pdata->properties->gpio_base	= INTEL_QUARK_MFD_GPIO_BASE;

include/linux/platform_data/gpio-dwapb.h

···
 #define GPIO_DW_APB_H
 
 struct dwapb_port_property {
-	struct device_node *node;
+	struct fwnode_handle *fwnode;
 	unsigned int	idx;
 	unsigned int	ngpio;
 	unsigned int	gpio_base;