diff --git a/target/linux/ramips/files-4.14/drivers/gpio/gpio-mt7621.c b/target/linux/ramips/files-4.14/drivers/gpio/gpio-mt7621.c
new file mode 100644
index 0000000000..9ee4a0ea42
--- /dev/null
+++ b/target/linux/ramips/files-4.14/drivers/gpio/gpio-mt7621.c
@@ -0,0 +1,354 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 as published
+ * by the Free Software Foundation.
+ *
+ * Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
+ */
+
+#include <linux/io.h>
+#include <linux/err.h>
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/of_irq.h>
+#include <linux/spinlock.h>
+#include <linux/irqdomain.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+
+#define MTK_MAX_BANK		3
+#define MTK_BANK_WIDTH		32
+
+enum mediatek_gpio_reg {
+	GPIO_REG_CTRL = 0,
+	GPIO_REG_POL,
+	GPIO_REG_DATA,
+	GPIO_REG_DSET,
+	GPIO_REG_DCLR,
+	GPIO_REG_REDGE,
+	GPIO_REG_FEDGE,
+	GPIO_REG_HLVL,
+	GPIO_REG_LLVL,
+	GPIO_REG_STAT,
+	GPIO_REG_EDGE,
+};
+
+static void __iomem *mediatek_gpio_membase;
+static int mediatek_gpio_irq;
+static struct irq_domain *mediatek_gpio_irq_domain;
+static atomic_t irq_refcount = ATOMIC_INIT(0);
+
+struct mtk_gc {
+	struct gpio_chip chip;
+	spinlock_t lock;
+	int bank;
+	u32 rising;
+	u32 falling;
+} *gc_map[MTK_MAX_BANK];
+
+static inline struct mtk_gc
+*to_mediatek_gpio(struct gpio_chip *chip)
+{
+	struct mtk_gc *mgc;
+
+	mgc = container_of(chip, struct mtk_gc, chip);
+
+	return mgc;
+}
+
+static inline void
+mtk_gpio_w32(struct mtk_gc *rg, u8 reg, u32 val)
+{
+	iowrite32(val, mediatek_gpio_membase + (reg * 0x10) + (rg->bank * 0x4));
+}
+
+static inline u32
+mtk_gpio_r32(struct mtk_gc *rg, u8 reg)
+{
+	return ioread32(mediatek_gpio_membase + (reg * 0x10) + (rg->bank * 0x4));
+}
+
+static void
+mediatek_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+{
+	struct mtk_gc *rg = to_mediatek_gpio(chip);
+
+	mtk_gpio_w32(rg, (value) ? GPIO_REG_DSET : GPIO_REG_DCLR, BIT(offset));
+}
+
+static int
+mediatek_gpio_get(struct gpio_chip *chip, unsigned offset)
+{
+	struct mtk_gc *rg = to_mediatek_gpio(chip);
+
+	return !!(mtk_gpio_r32(rg, GPIO_REG_DATA) & BIT(offset));
+}
+
+static int
+mediatek_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
+{
+	struct mtk_gc *rg = to_mediatek_gpio(chip);
+	unsigned long flags;
+	u32 t;
+
+	spin_lock_irqsave(&rg->lock, flags);
+	t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
+	t &= ~BIT(offset);
+	mtk_gpio_w32(rg, GPIO_REG_CTRL, t);
+	spin_unlock_irqrestore(&rg->lock, flags);
+
+	return 0;
+}
+
+static int
+mediatek_gpio_direction_output(struct gpio_chip *chip,
+					unsigned offset, int value)
+{
+	struct mtk_gc *rg = to_mediatek_gpio(chip);
+	unsigned long flags;
+	u32 t;
+
+	spin_lock_irqsave(&rg->lock, flags);
+	t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
+	t |= BIT(offset);
+	mtk_gpio_w32(rg, GPIO_REG_CTRL, t);
+	mediatek_gpio_set(chip, offset, value);
+	spin_unlock_irqrestore(&rg->lock, flags);
+
+	return 0;
+}
+
+static int
+mediatek_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
+{
+	struct mtk_gc *rg = to_mediatek_gpio(chip);
+	unsigned long flags;
+	u32 t;
+
+	spin_lock_irqsave(&rg->lock, flags);
+	t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
+	spin_unlock_irqrestore(&rg->lock, flags);
+
+	if (t & BIT(offset))
+		return 0;
+
+	return 1;
+}
+
+static int
+mediatek_gpio_to_irq(struct gpio_chip *chip, unsigned pin)
+{
+	struct mtk_gc *rg = to_mediatek_gpio(chip);
+
+	return irq_create_mapping(mediatek_gpio_irq_domain, pin + (rg->bank * MTK_BANK_WIDTH));
+}
+
+static int
+mediatek_gpio_bank_probe(struct platform_device *pdev, struct device_node *bank)
+{
+	const __be32 *id = of_get_property(bank, "reg", NULL);
+	struct mtk_gc *rg = devm_kzalloc(&pdev->dev,
+				sizeof(struct mtk_gc), GFP_KERNEL);
+
+	if (!rg || !id || be32_to_cpu(*id) > MTK_MAX_BANK)
+		return -ENOMEM;
+
+	gc_map[be32_to_cpu(*id)] = rg;
+
+	memset(rg, 0, sizeof(struct mtk_gc));
+
+	spin_lock_init(&rg->lock);
+
+	rg->chip.parent = &pdev->dev;
+	rg->chip.label = dev_name(&pdev->dev);
+	rg->chip.of_node = bank;
+	rg->chip.base = MTK_BANK_WIDTH * be32_to_cpu(*id);
+	rg->chip.ngpio = MTK_BANK_WIDTH;
+	rg->chip.direction_input = mediatek_gpio_direction_input;
+	rg->chip.direction_output = mediatek_gpio_direction_output;
+	rg->chip.get_direction = mediatek_gpio_get_direction;
+	rg->chip.get = mediatek_gpio_get;
+	rg->chip.set = mediatek_gpio_set;
+	if (mediatek_gpio_irq_domain)
+		rg->chip.to_irq = mediatek_gpio_to_irq;
+	rg->bank = be32_to_cpu(*id);
+
+	/* set polarity to low for all gpios */
+	mtk_gpio_w32(rg, GPIO_REG_POL, 0);
+
+	dev_info(&pdev->dev, "registering %d gpios\n", rg->chip.ngpio);
+
+	return gpiochip_add(&rg->chip);
+}
+
+static void
+mediatek_gpio_irq_handler(struct irq_desc *desc)
+{
+	int i;
+
+	for (i = 0; i < MTK_MAX_BANK; i++) {
+		struct mtk_gc *rg = gc_map[i];
+		unsigned long pending;
+		int bit;
+
+		if (!rg)
+			continue;
+
+		pending = mtk_gpio_r32(rg, GPIO_REG_STAT);
+
+		for_each_set_bit(bit, &pending, MTK_BANK_WIDTH) {
+			u32 map = irq_find_mapping(mediatek_gpio_irq_domain, (MTK_BANK_WIDTH * i) + bit);
+
+			generic_handle_irq(map);
+			mtk_gpio_w32(rg, GPIO_REG_STAT, BIT(bit));
+		}
+	}
+}
+
+static void
+mediatek_gpio_irq_unmask(struct irq_data *d)
+{
+	int pin = d->hwirq;
+	int bank = pin / 32;
+	struct mtk_gc *rg = gc_map[bank];
+	unsigned long flags;
+	u32 rise, fall;
+
+	if (!rg)
+		return;
+
+	rise = mtk_gpio_r32(rg, GPIO_REG_REDGE);
+	fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE);
+
+	spin_lock_irqsave(&rg->lock, flags);
+	mtk_gpio_w32(rg, GPIO_REG_REDGE, rise | (BIT(d->hwirq) & rg->rising));
+	mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall | (BIT(d->hwirq) & rg->falling));
+	spin_unlock_irqrestore(&rg->lock, flags);
+}
+
+static void
+mediatek_gpio_irq_mask(struct irq_data *d)
+{
+	int pin = d->hwirq;
+	int bank = pin / 32;
+	struct mtk_gc *rg = gc_map[bank];
+	unsigned long flags;
+	u32 rise, fall;
+
+	if (!rg)
+		return;
+
+	rise = mtk_gpio_r32(rg, GPIO_REG_REDGE);
+	fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE);
+
+	spin_lock_irqsave(&rg->lock, flags);
+	mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall & ~BIT(d->hwirq));
+	mtk_gpio_w32(rg, GPIO_REG_REDGE, rise & ~BIT(d->hwirq));
+	spin_unlock_irqrestore(&rg->lock, flags);
+}
+
+static int
+mediatek_gpio_irq_type(struct irq_data *d, unsigned int type)
+{
+	int pin = d->hwirq;
+	int bank = pin / 32;
+	struct mtk_gc *rg = gc_map[bank];
+	u32 mask = BIT(d->hwirq);
+
+	if (!rg)
+		return -1;
+
+	if (type == IRQ_TYPE_PROBE) {
+		if ((rg->rising | rg->falling) & mask)
+			return 0;
+
+		type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
+	}
+
+	if (type & IRQ_TYPE_EDGE_RISING)
+		rg->rising |= mask;
+	else
+		rg->rising &= ~mask;
+
+	if (type & IRQ_TYPE_EDGE_FALLING)
+		rg->falling |= mask;
+	else
+		rg->falling &= ~mask;
+
+	return 0;
+}
+
+static struct irq_chip mediatek_gpio_irq_chip = {
+	.name		= "GPIO",
+	.irq_unmask	= mediatek_gpio_irq_unmask,
+	.irq_mask	= mediatek_gpio_irq_mask,
+	.irq_mask_ack	= mediatek_gpio_irq_mask,
+	.irq_set_type	= mediatek_gpio_irq_type,
+};
+
+static int
+mediatek_gpio_gpio_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
+{
+	irq_set_chip_and_handler(irq, &mediatek_gpio_irq_chip, handle_level_irq);
+	irq_set_handler_data(irq, d);
+
+	return 0;
+}
+
+static const struct irq_domain_ops irq_domain_ops = {
+	.xlate = irq_domain_xlate_onecell,
+	.map = mediatek_gpio_gpio_map,
+};
+
+static int
+mediatek_gpio_probe(struct platform_device *pdev)
+{
+	struct device_node *bank, *np = pdev->dev.of_node;
+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+	mediatek_gpio_membase = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(mediatek_gpio_membase))
+		return PTR_ERR(mediatek_gpio_membase);
+
+	mediatek_gpio_irq = irq_of_parse_and_map(np, 0);
+	if (mediatek_gpio_irq) {
+		mediatek_gpio_irq_domain = irq_domain_add_linear(np,
+			MTK_MAX_BANK * MTK_BANK_WIDTH,
+			&irq_domain_ops, NULL);
+		if (!mediatek_gpio_irq_domain)
+			dev_err(&pdev->dev, "irq_domain_add_linear failed\n");
+	}
+
+	for_each_child_of_node(np, bank)
+		if (of_device_is_compatible(bank, "mtk,mt7621-gpio-bank"))
+			mediatek_gpio_bank_probe(pdev, bank);
+
+	if (mediatek_gpio_irq_domain)
+		irq_set_chained_handler(mediatek_gpio_irq, mediatek_gpio_irq_handler);
+
+	return 0;
+}
+
+static const struct of_device_id mediatek_gpio_match[] = {
+	{ .compatible = "mtk,mt7621-gpio" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mediatek_gpio_match);
+
+static struct platform_driver mediatek_gpio_driver = {
+	.probe = mediatek_gpio_probe,
+	.driver = {
+		.name = "mt7621_gpio",
+		.owner = THIS_MODULE,
+		.of_match_table = mediatek_gpio_match,
+	},
+};
+
+static int __init
+mediatek_gpio_init(void)
+{
+	return platform_driver_register(&mediatek_gpio_driver);
+}
+
+subsys_initcall(mediatek_gpio_init);
diff --git a/target/linux/ramips/patches-4.14/0028-GPIO-ralink-add-mt7621-gpio-controller.patch b/target/linux/ramips/patches-4.14/0028-GPIO-ralink-add-mt7621-gpio-controller.patch
index d657274efe..6f26775baa 100644
--- a/target/linux/ramips/patches-4.14/0028-GPIO-ralink-add-mt7621-gpio-controller.patch
+++ b/target/linux/ramips/patches-4.14/0028-GPIO-ralink-add-mt7621-gpio-controller.patch
@@ -8,9 +8,7 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
  arch/mips/Kconfig          |    3 +
  drivers/gpio/Kconfig       |    6 +
  drivers/gpio/Makefile      |    1 +
- drivers/gpio/gpio-mt7621.c |  354 ++++++++++++++++++++++++++++++++++++++++++++
- 4 files changed, 364 insertions(+)
- create mode 100644 drivers/gpio/gpio-mt7621.c
+ 3 files changed, 10 insertions(+)
 
 --- a/arch/mips/Kconfig
 +++ b/arch/mips/Kconfig
@@ -46,360 +44,3 @@ Signed-off-by: John Crispin <blogic@openwrt.org>
  obj-$(CONFIG_GPIO_ZX)		+= gpio-zx.o
  obj-$(CONFIG_GPIO_LOONGSON1)	+= gpio-loongson1.o
 +obj-$(CONFIG_GPIO_MT7621)	+= gpio-mt7621.o
---- /dev/null
-+++ b/drivers/gpio/gpio-mt7621.c
-@@ -0,0 +1,354 @@
-+/*
-+ * This program is free software; you can redistribute it and/or modify it
-+ * under the terms of the GNU General Public License version 2 as published
-+ * by the Free Software Foundation.
-+ *
-+ * Copyright (C) 2009-2011 Gabor Juhos <juhosg@openwrt.org>
-+ * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
-+ */
-+
-+#include <linux/io.h>
-+#include <linux/err.h>
-+#include <linux/gpio.h>
-+#include <linux/module.h>
-+#include <linux/of_irq.h>
-+#include <linux/spinlock.h>
-+#include <linux/irqdomain.h>
-+#include <linux/interrupt.h>
-+#include <linux/platform_device.h>
-+
-+#define MTK_MAX_BANK		3
-+#define MTK_BANK_WIDTH		32
-+
-+enum mediatek_gpio_reg {
-+	GPIO_REG_CTRL = 0,
-+	GPIO_REG_POL,
-+	GPIO_REG_DATA,
-+	GPIO_REG_DSET,
-+	GPIO_REG_DCLR,
-+	GPIO_REG_REDGE,
-+	GPIO_REG_FEDGE,
-+	GPIO_REG_HLVL,
-+	GPIO_REG_LLVL,
-+	GPIO_REG_STAT,
-+	GPIO_REG_EDGE,
-+};
-+
-+static void __iomem *mediatek_gpio_membase;
-+static int mediatek_gpio_irq;
-+static struct irq_domain *mediatek_gpio_irq_domain;
-+static atomic_t irq_refcount = ATOMIC_INIT(0);
-+
-+struct mtk_gc {
-+	struct gpio_chip chip;
-+	spinlock_t lock;
-+	int bank;
-+	u32 rising;
-+	u32 falling;
-+} *gc_map[MTK_MAX_BANK];
-+
-+static inline struct mtk_gc
-+*to_mediatek_gpio(struct gpio_chip *chip)
-+{
-+	struct mtk_gc *mgc;
-+
-+	mgc = container_of(chip, struct mtk_gc, chip);
-+
-+	return mgc;
-+}
-+
-+static inline void
-+mtk_gpio_w32(struct mtk_gc *rg, u8 reg, u32 val)
-+{
-+	iowrite32(val, mediatek_gpio_membase + (reg * 0x10) + (rg->bank * 0x4));
-+}
-+
-+static inline u32
-+mtk_gpio_r32(struct mtk_gc *rg, u8 reg)
-+{
-+	return ioread32(mediatek_gpio_membase + (reg * 0x10) + (rg->bank * 0x4));
-+}
-+
-+static void
-+mediatek_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
-+{
-+	struct mtk_gc *rg = to_mediatek_gpio(chip);
-+
-+	mtk_gpio_w32(rg, (value) ? GPIO_REG_DSET : GPIO_REG_DCLR, BIT(offset));
-+}
-+
-+static int
-+mediatek_gpio_get(struct gpio_chip *chip, unsigned offset)
-+{
-+	struct mtk_gc *rg = to_mediatek_gpio(chip);
-+
-+	return !!(mtk_gpio_r32(rg, GPIO_REG_DATA) & BIT(offset));
-+}
-+
-+static int
-+mediatek_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
-+{
-+	struct mtk_gc *rg = to_mediatek_gpio(chip);
-+	unsigned long flags;
-+	u32 t;
-+
-+	spin_lock_irqsave(&rg->lock, flags);
-+	t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
-+	t &= ~BIT(offset);
-+	mtk_gpio_w32(rg, GPIO_REG_CTRL, t);
-+	spin_unlock_irqrestore(&rg->lock, flags);
-+
-+	return 0;
-+}
-+
-+static int
-+mediatek_gpio_direction_output(struct gpio_chip *chip,
-+					unsigned offset, int value)
-+{
-+	struct mtk_gc *rg = to_mediatek_gpio(chip);
-+	unsigned long flags;
-+	u32 t;
-+
-+	spin_lock_irqsave(&rg->lock, flags);
-+	t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
-+	t |= BIT(offset);
-+	mtk_gpio_w32(rg, GPIO_REG_CTRL, t);
-+	mediatek_gpio_set(chip, offset, value);
-+	spin_unlock_irqrestore(&rg->lock, flags);
-+
-+	return 0;
-+}
-+
-+static int
-+mediatek_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
-+{
-+	struct mtk_gc *rg = to_mediatek_gpio(chip);
-+	unsigned long flags;
-+	u32 t;
-+
-+	spin_lock_irqsave(&rg->lock, flags);
-+	t = mtk_gpio_r32(rg, GPIO_REG_CTRL);
-+	spin_unlock_irqrestore(&rg->lock, flags);
-+
-+	if (t & BIT(offset))
-+		return 0;
-+
-+	return 1;
-+}
-+
-+static int
-+mediatek_gpio_to_irq(struct gpio_chip *chip, unsigned pin)
-+{
-+	struct mtk_gc *rg = to_mediatek_gpio(chip);
-+
-+	return irq_create_mapping(mediatek_gpio_irq_domain, pin + (rg->bank * MTK_BANK_WIDTH));
-+}
-+
-+static int
-+mediatek_gpio_bank_probe(struct platform_device *pdev, struct device_node *bank)
-+{
-+	const __be32 *id = of_get_property(bank, "reg", NULL);
-+	struct mtk_gc *rg = devm_kzalloc(&pdev->dev,
-+				sizeof(struct mtk_gc), GFP_KERNEL);
-+
-+	if (!rg || !id || be32_to_cpu(*id) > MTK_MAX_BANK)
-+		return -ENOMEM;
-+
-+	gc_map[be32_to_cpu(*id)] = rg;
-+
-+	memset(rg, 0, sizeof(struct mtk_gc));
-+
-+	spin_lock_init(&rg->lock);
-+
-+	rg->chip.parent = &pdev->dev;
-+	rg->chip.label = dev_name(&pdev->dev);
-+	rg->chip.of_node = bank;
-+	rg->chip.base = MTK_BANK_WIDTH * be32_to_cpu(*id);
-+	rg->chip.ngpio = MTK_BANK_WIDTH;
-+	rg->chip.direction_input = mediatek_gpio_direction_input;
-+	rg->chip.direction_output = mediatek_gpio_direction_output;
-+	rg->chip.get_direction = mediatek_gpio_get_direction;
-+	rg->chip.get = mediatek_gpio_get;
-+	rg->chip.set = mediatek_gpio_set;
-+	if (mediatek_gpio_irq_domain)
-+		rg->chip.to_irq = mediatek_gpio_to_irq;
-+	rg->bank = be32_to_cpu(*id);
-+
-+	/* set polarity to low for all gpios */
-+	mtk_gpio_w32(rg, GPIO_REG_POL, 0);
-+
-+	dev_info(&pdev->dev, "registering %d gpios\n", rg->chip.ngpio);
-+
-+	return gpiochip_add(&rg->chip);
-+}
-+
-+static void
-+mediatek_gpio_irq_handler(struct irq_desc *desc)
-+{
-+	int i;
-+
-+	for (i = 0; i < MTK_MAX_BANK; i++) {
-+		struct mtk_gc *rg = gc_map[i];
-+		unsigned long pending;
-+		int bit;
-+
-+		if (!rg)
-+			continue;
-+
-+		pending = mtk_gpio_r32(rg, GPIO_REG_STAT);
-+
-+		for_each_set_bit(bit, &pending, MTK_BANK_WIDTH) {
-+			u32 map = irq_find_mapping(mediatek_gpio_irq_domain, (MTK_BANK_WIDTH * i) + bit);
-+
-+			generic_handle_irq(map);
-+			mtk_gpio_w32(rg, GPIO_REG_STAT, BIT(bit));
-+		}
-+	}
-+}
-+
-+static void
-+mediatek_gpio_irq_unmask(struct irq_data *d)
-+{
-+	int pin = d->hwirq;
-+	int bank = pin / 32;
-+	struct mtk_gc *rg = gc_map[bank];
-+	unsigned long flags;
-+	u32 rise, fall;
-+
-+	if (!rg)
-+		return;
-+
-+	rise = mtk_gpio_r32(rg, GPIO_REG_REDGE);
-+	fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE);
-+
-+	spin_lock_irqsave(&rg->lock, flags);
-+	mtk_gpio_w32(rg, GPIO_REG_REDGE, rise | (BIT(d->hwirq) & rg->rising));
-+	mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall | (BIT(d->hwirq) & rg->falling));
-+	spin_unlock_irqrestore(&rg->lock, flags);
-+}
-+
-+static void
-+mediatek_gpio_irq_mask(struct irq_data *d)
-+{
-+	int pin = d->hwirq;
-+	int bank = pin / 32;
-+	struct mtk_gc *rg = gc_map[bank];
-+	unsigned long flags;
-+	u32 rise, fall;
-+
-+	if (!rg)
-+		return;
-+
-+	rise = mtk_gpio_r32(rg, GPIO_REG_REDGE);
-+	fall = mtk_gpio_r32(rg, GPIO_REG_FEDGE);
-+
-+	spin_lock_irqsave(&rg->lock, flags);
-+	mtk_gpio_w32(rg, GPIO_REG_FEDGE, fall & ~BIT(d->hwirq));
-+	mtk_gpio_w32(rg, GPIO_REG_REDGE, rise & ~BIT(d->hwirq));
-+	spin_unlock_irqrestore(&rg->lock, flags);
-+}
-+
-+static int
-+mediatek_gpio_irq_type(struct irq_data *d, unsigned int type)
-+{
-+	int pin = d->hwirq;
-+	int bank = pin / 32;
-+	struct mtk_gc *rg = gc_map[bank];
-+	u32 mask = BIT(d->hwirq);
-+
-+	if (!rg)
-+		return -1;
-+
-+	if (type == IRQ_TYPE_PROBE) {
-+		if ((rg->rising | rg->falling) & mask)
-+			return 0;
-+
-+		type = IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING;
-+	}
-+
-+	if (type & IRQ_TYPE_EDGE_RISING)
-+		rg->rising |= mask;
-+	else
-+		rg->rising &= ~mask;
-+
-+	if (type & IRQ_TYPE_EDGE_FALLING)
-+		rg->falling |= mask;
-+	else
-+		rg->falling &= ~mask;
-+
-+	return 0;
-+}
-+
-+static struct irq_chip mediatek_gpio_irq_chip = {
-+	.name		= "GPIO",
-+	.irq_unmask	= mediatek_gpio_irq_unmask,
-+	.irq_mask	= mediatek_gpio_irq_mask,
-+	.irq_mask_ack	= mediatek_gpio_irq_mask,
-+	.irq_set_type	= mediatek_gpio_irq_type,
-+};
-+
-+static int
-+mediatek_gpio_gpio_map(struct irq_domain *d, unsigned int irq, irq_hw_number_t hw)
-+{
-+	irq_set_chip_and_handler(irq, &mediatek_gpio_irq_chip, handle_level_irq);
-+	irq_set_handler_data(irq, d);
-+
-+	return 0;
-+}
-+
-+static const struct irq_domain_ops irq_domain_ops = {
-+	.xlate = irq_domain_xlate_onecell,
-+	.map = mediatek_gpio_gpio_map,
-+};
-+
-+static int
-+mediatek_gpio_probe(struct platform_device *pdev)
-+{
-+	struct device_node *bank, *np = pdev->dev.of_node;
-+	struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-+
-+	mediatek_gpio_membase = devm_ioremap_resource(&pdev->dev, res);
-+	if (IS_ERR(mediatek_gpio_membase))
-+		return PTR_ERR(mediatek_gpio_membase);
-+
-+	mediatek_gpio_irq = irq_of_parse_and_map(np, 0);
-+	if (mediatek_gpio_irq) {
-+		mediatek_gpio_irq_domain = irq_domain_add_linear(np,
-+			MTK_MAX_BANK * MTK_BANK_WIDTH,
-+			&irq_domain_ops, NULL);
-+		if (!mediatek_gpio_irq_domain)
-+			dev_err(&pdev->dev, "irq_domain_add_linear failed\n");
-+	}
-+
-+	for_each_child_of_node(np, bank)
-+		if (of_device_is_compatible(bank, "mtk,mt7621-gpio-bank"))
-+			mediatek_gpio_bank_probe(pdev, bank);
-+
-+	if (mediatek_gpio_irq_domain)
-+		irq_set_chained_handler(mediatek_gpio_irq, mediatek_gpio_irq_handler);
-+
-+	return 0;
-+}
-+
-+static const struct of_device_id mediatek_gpio_match[] = {
-+	{ .compatible = "mtk,mt7621-gpio" },
-+	{},
-+};
-+MODULE_DEVICE_TABLE(of, mediatek_gpio_match);
-+
-+static struct platform_driver mediatek_gpio_driver = {
-+	.probe = mediatek_gpio_probe,
-+	.driver = {
-+		.name = "mt7621_gpio",
-+		.owner = THIS_MODULE,
-+		.of_match_table = mediatek_gpio_match,
-+	},
-+};
-+
-+static int __init
-+mediatek_gpio_init(void)
-+{
-+	return platform_driver_register(&mediatek_gpio_driver);
-+}
-+
-+subsys_initcall(mediatek_gpio_init);
