Merge tag 'gpio-v5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO updates from Linus Walleij:
 "This is the bulk of GPIO changes for the v5.8 kernel cycle.

  Core changes:

   - A new GPIO aggregator driver has been merged: this can join a few
     select GPIO lines into a new aggregated GPIO chip. This can be used
     for security: a process can be granted access to only these lines,
     for example for industrial control. Another way to use this is to
     reexpose certain select lines to a virtual machine or container.

   - Warn if the gpio-line-names is too long in he DT parser core.

   - GPIO lines can now be looked up by line name in addition to being
     looked up by offset.

  New drivers:

   - A new generic regmap GPIO driver has been merged. Too many regmap
     drivers are starting to look like each other so we need to create
     some common ground and try to move drivers over to using that.

   - The F7188X driver now supports F81865.

  Driver improvements:

   - Large improvements to the PCA953x expander, get multiple lines and
     several cleanups.

   - Large improvements to the DesignWare DWAPB driver, and Sergey Semin
     has volunteered to maintain it.

   - PL061 can now be built as a module, this is part of a bigger effort
     to make the ARM platforms more modular"

* tag 'gpio-v5.8-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (77 commits)
  gpio: pca953x: Drop unneeded ACPI_PTR()
  MAINTAINERS: Add gpio regmap section
  gpio: add a reusable generic gpio_chip using regmap
  gpiolib: Introduce gpiochip_irqchip_add_domain()
  gpio: gpiolib: Allow GPIO IRQs to lazy disable
  gpiolib: Separate GPIO_GET_LINEINFO_WATCH_IOCTL conditional
  gpio: rcar: Fix runtime PM imbalance on error
  gpio: pca935x: Allow IRQ support for driver built as a module
  gpio: pxa: Add COMPILE_TEST support
  dt-bindings: gpio: Add renesas,em-gio bindings
  MAINTAINERS: Fix file name for DesignWare GPIO DT schema
  gpio: dwapb: Remove unneeded has_irq member in struct dwapb_port_property
  gpio: dwapb: Don't use IRQ 0 as valid Linux interrupt
  gpio: dwapb: avoid error message for optional IRQ
  gpio: dwapb: Call acpi_gpiochip_free_interrupts() on GPIO chip de-registration
  gpio: max730x: bring gpiochip_add_data after port config
  MAINTAINERS: Add GPIO Aggregator section
  docs: gpio: Add GPIO Aggregator documentation
  gpio: Add GPIO Aggregator
  gpiolib: Add support for GPIO lookup by line name
  ...

25 files changed, 1367 insertions, 332 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 1b96169d84f7..bcacd9c74aa8 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -73,6 +73,10 @@ config GPIO_GENERIC
 	depends on HAS_IOMEM # Only for IOMEM drivers
 	tristate
 
+config GPIO_REGMAP
+	depends on REGMAP
+	tristate
+
 # put drivers in the right section, in alphabetical order
 
 # This symbol is selected by both I2C and SPI expanders
@@ -422,7 +426,7 @@ config GPIO_OMAP
 	  Say yes here to enable GPIO support for TI OMAP SoCs.
 
 config GPIO_PL061
-	bool "PrimeCell PL061 GPIO support"
+	tristate "PrimeCell PL061 GPIO support"
 	depends on ARM_AMBA
 	select IRQ_DOMAIN
 	select GPIOLIB_IRQCHIP
@@ -439,7 +443,7 @@ config GPIO_PMIC_EIC_SPRD
 
 config GPIO_PXA
 	bool "PXA GPIO support"
-	depends on ARCH_PXA || ARCH_MMP
+	depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST
 	help
 	  Say yes here to support the PXA GPIO device
 
@@ -638,7 +642,7 @@ config GPIO_XGENE
 
 config GPIO_XGENE_SB
 	tristate "APM X-Gene GPIO standby controller support"
-	depends on ARCH_XGENE && OF_GPIO
+	depends on (ARCH_XGENE || COMPILE_TEST)
 	select GPIO_GENERIC
 	select GPIOLIB_IRQCHIP
 	select IRQ_DOMAIN_HIERARCHY
@@ -952,7 +956,7 @@ config GPIO_PCA953X
 
 config GPIO_PCA953X_IRQ
 	bool "Interrupt controller support for PCA953x"
-	depends on GPIO_PCA953X=y
+	depends on GPIO_PCA953X
 	select GPIOLIB_IRQCHIP
 	help
 	  Say yes here to enable the pca953x to be used as an interrupt
@@ -1541,6 +1545,18 @@ config GPIO_VIPERBOARD
 
 endmenu
 
+config GPIO_AGGREGATOR
+	tristate "GPIO Aggregator"
+	help
+	  Say yes here to enable the GPIO Aggregator, which provides a way to
+	  aggregate existing GPIO lines into a new virtual GPIO chip.
+	  This can serve the following purposes:
+	    - Assign permissions for a collection of GPIO lines to a user,
+	    - Export a collection of GPIO lines to a virtual machine,
+	    - Provide a generic driver for a GPIO-operated device in an
+	      industrial control context, to be operated from userspace using
+	      the GPIO chardev interface.
+
 config GPIO_MOCKUP
 	tristate "GPIO Testing Driver"
 	select IRQ_SIM
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index b2cfc21a97f3..1e4894e0bf0f 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_GPIO_SYSFS)	+= gpiolib-sysfs.o
 obj-$(CONFIG_GPIO_ACPI)		+= gpiolib-acpi.o
 
 # Device drivers. Generally keep list sorted alphabetically
+obj-$(CONFIG_GPIO_REGMAP)	+= gpio-regmap.o
 obj-$(CONFIG_GPIO_GENERIC)	+= gpio-generic.o
 
 # directly supported by gpio-generic
@@ -25,6 +26,7 @@ obj-$(CONFIG_GPIO_74XX_MMIO)		+= gpio-74xx-mmio.o
 obj-$(CONFIG_GPIO_ADNP)			+= gpio-adnp.o
 obj-$(CONFIG_GPIO_ADP5520)		+= gpio-adp5520.o
 obj-$(CONFIG_GPIO_ADP5588)		+= gpio-adp5588.o
+obj-$(CONFIG_GPIO_AGGREGATOR)		+= gpio-aggregator.o
 obj-$(CONFIG_GPIO_ALTERA_A10SR)		+= gpio-altera-a10sr.o
 obj-$(CONFIG_GPIO_ALTERA)  		+= gpio-altera.o
 obj-$(CONFIG_GPIO_AMD8111)		+= gpio-amd8111.o
diff --git a/drivers/gpio/TODO b/drivers/gpio/TODO
index 3a44e6ae52bd..b989c9352da2 100644
--- a/drivers/gpio/TODO
+++ b/drivers/gpio/TODO
@@ -99,6 +99,10 @@ similar and probe a proper driver in the gpiolib subsystem.
 In some cases it makes sense to create a GPIO chip from the local driver
 for a few GPIOs. Those should stay where they are.
 
+At the same time it makes sense to get rid of code duplication in existing or
+new coming drivers. For example, gpio-ml-ioh should be incorporated into
+gpio-pch. In similar way gpio-intel-mid into gpio-pxa.
+
 
 Generic MMIO GPIO
 
diff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c
new file mode 100644
index 000000000000..9b0adbdddbfc
--- /dev/null
+++ b/drivers/gpio/gpio-aggregator.c
@@ -0,0 +1,568 @@
+// SPDX-License-Identifier: GPL-2.0-only
+//
+// GPIO Aggregator
+//
+// Copyright (C) 2019-2020 Glider bv
+
+#define DRV_NAME       "gpio-aggregator"
+#define pr_fmt(fmt)	DRV_NAME ": " fmt
+
+#include <linux/bitmap.h>
+#include <linux/bitops.h>
+#include <linux/ctype.h>
+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
+#include <linux/idr.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/overflow.h>
+#include <linux/platform_device.h>
+#include <linux/spinlock.h>
+#include <linux/string.h>
+
+
+/*
+ * GPIO Aggregator sysfs interface
+ */
+
+struct gpio_aggregator {
+	struct gpiod_lookup_table *lookups;
+	struct platform_device *pdev;
+	char args[];
+};
+
+static DEFINE_MUTEX(gpio_aggregator_lock);	/* protects idr */
+static DEFINE_IDR(gpio_aggregator_idr);
+
+static char *get_arg(char **args)
+{
+	char *start = *args, *end;
+
+	start = skip_spaces(start);
+	if (!*start)
+		return NULL;
+
+	if (*start == '"') {
+		/* Quoted arg */
+		end = strchr(++start, '"');
+		if (!end)
+			return ERR_PTR(-EINVAL);
+	} else {
+		/* Unquoted arg */
+		for (end = start; *end && !isspace(*end); end++) ;
+	}
+
+	if (*end)
+		*end++ = '\0';
+
+	*args = end;
+	return start;
+}
+
+static bool isrange(const char *s)
+{
+	size_t n;
+
+	if (IS_ERR_OR_NULL(s))
+		return false;
+
+	while (1) {
+		n = strspn(s, "0123456789");
+		if (!n)
+			return false;
+
+		s += n;
+
+		switch (*s++) {
+		case '\0':
+			return true;
+
+		case '-':
+		case ',':
+			break;
+
+		default:
+			return false;
+		}
+	}
+}
+
+static int aggr_add_gpio(struct gpio_aggregator *aggr, const char *key,
+			 int hwnum, unsigned int *n)
+{
+	struct gpiod_lookup_table *lookups;
+
+	lookups = krealloc(aggr->lookups, struct_size(lookups, table, *n + 2),
+			   GFP_KERNEL);
+	if (!lookups)
+		return -ENOMEM;
+
+	lookups->table[*n] =
+		(struct gpiod_lookup)GPIO_LOOKUP_IDX(key, hwnum, NULL, *n, 0);
+
+	(*n)++;
+	memset(&lookups->table[*n], 0, sizeof(lookups->table[*n]));
+
+	aggr->lookups = lookups;
+	return 0;
+}
+
+static int aggr_parse(struct gpio_aggregator *aggr)
+{
+	unsigned int first_index, last_index, i, n = 0;
+	char *name, *offsets, *first, *last, *next;
+	char *args = aggr->args;
+	int error;
+
+	for (name = get_arg(&args), offsets = get_arg(&args); name;
+	     offsets = get_arg(&args)) {
+		if (IS_ERR(name)) {
+			pr_err("Cannot get GPIO specifier: %pe\n", name);
+			return PTR_ERR(name);
+		}
+
+		if (!isrange(offsets)) {
+			/* Named GPIO line */
+			error = aggr_add_gpio(aggr, name, U16_MAX, &n);
+			if (error)
+				return error;
+
+			name = offsets;
+			continue;
+		}
+
+		/* GPIO chip + offset(s) */
+		for (first = offsets; *first; first = next) {
+			next = strchrnul(first, ',');
+			if (*next)
+				*next++ = '\0';
+
+			last = strchr(first, '-');
+			if (last)
+				*last++ = '\0';
+
+			if (kstrtouint(first, 10, &first_index)) {
+				pr_err("Cannot parse GPIO index %s\n", first);
+				return -EINVAL;
+			}
+
+			if (!last) {
+				last_index = first_index;
+			} else if (kstrtouint(last, 10, &last_index)) {
+				pr_err("Cannot parse GPIO index %s\n", last);
+				return -EINVAL;
+			}
+
+			for (i = first_index; i <= last_index; i++) {
+				error = aggr_add_gpio(aggr, name, i, &n);
+				if (error)
+					return error;
+			}
+		}
+
+		name = get_arg(&args);
+	}
+
+	if (!n) {
+		pr_err("No GPIOs specified\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static ssize_t new_device_store(struct device_driver *driver, const char *buf,
+				size_t count)
+{
+	struct gpio_aggregator *aggr;
+	struct platform_device *pdev;
+	int res, id;
+
+	/* kernfs guarantees string termination, so count + 1 is safe */
+	aggr = kzalloc(sizeof(*aggr) + count + 1, GFP_KERNEL);
+	if (!aggr)
+		return -ENOMEM;
+
+	memcpy(aggr->args, buf, count + 1);
+
+	aggr->lookups = kzalloc(struct_size(aggr->lookups, table, 1),
+				GFP_KERNEL);
+	if (!aggr->lookups) {
+		res = -ENOMEM;
+		goto free_ga;
+	}
+
+	mutex_lock(&gpio_aggregator_lock);
+	id = idr_alloc(&gpio_aggregator_idr, aggr, 0, 0, GFP_KERNEL);
+	mutex_unlock(&gpio_aggregator_lock);
+
+	if (id < 0) {
+		res = id;
+		goto free_table;
+	}
+
+	aggr->lookups->dev_id = kasprintf(GFP_KERNEL, "%s.%d", DRV_NAME, id);
+	if (!aggr->lookups->dev_id) {
+		res = -ENOMEM;
+		goto remove_idr;
+	}
+
+	res = aggr_parse(aggr);
+	if (res)
+		goto free_dev_id;
+
+	gpiod_add_lookup_table(aggr->lookups);
+
+	pdev = platform_device_register_simple(DRV_NAME, id, NULL, 0);
+	if (IS_ERR(pdev)) {
+		res = PTR_ERR(pdev);
+		goto remove_table;
+	}
+
+	aggr->pdev = pdev;
+	return count;
+
+remove_table:
+	gpiod_remove_lookup_table(aggr->lookups);
+free_dev_id:
+	kfree(aggr->lookups->dev_id);
+remove_idr:
+	mutex_lock(&gpio_aggregator_lock);
+	idr_remove(&gpio_aggregator_idr, id);
+	mutex_unlock(&gpio_aggregator_lock);
+free_table:
+	kfree(aggr->lookups);
+free_ga:
+	kfree(aggr);
+	return res;
+}
+
+static DRIVER_ATTR_WO(new_device);
+
+static void gpio_aggregator_free(struct gpio_aggregator *aggr)
+{
+	platform_device_unregister(aggr->pdev);
+	gpiod_remove_lookup_table(aggr->lookups);
+	kfree(aggr->lookups->dev_id);
+	kfree(aggr->lookups);
+	kfree(aggr);
+}
+
+static ssize_t delete_device_store(struct device_driver *driver,
+				   const char *buf, size_t count)
+{
+	struct gpio_aggregator *aggr;
+	unsigned int id;
+	int error;
+
+	if (!str_has_prefix(buf, DRV_NAME "."))
+		return -EINVAL;
+
+	error = kstrtouint(buf + strlen(DRV_NAME "."), 10, &id);
+	if (error)
+		return error;
+
+	mutex_lock(&gpio_aggregator_lock);
+	aggr = idr_remove(&gpio_aggregator_idr, id);
+	mutex_unlock(&gpio_aggregator_lock);
+	if (!aggr)
+		return -ENOENT;
+
+	gpio_aggregator_free(aggr);
+	return count;
+}
+static DRIVER_ATTR_WO(delete_device);
+
+static struct attribute *gpio_aggregator_attrs[] = {
+	&driver_attr_new_device.attr,
+	&driver_attr_delete_device.attr,
+	NULL,
+};
+ATTRIBUTE_GROUPS(gpio_aggregator);
+
+static int __exit gpio_aggregator_idr_remove(int id, void *p, void *data)
+{
+	gpio_aggregator_free(p);
+	return 0;
+}
+
+static void __exit gpio_aggregator_remove_all(void)
+{
+	mutex_lock(&gpio_aggregator_lock);
+	idr_for_each(&gpio_aggregator_idr, gpio_aggregator_idr_remove, NULL);
+	idr_destroy(&gpio_aggregator_idr);
+	mutex_unlock(&gpio_aggregator_lock);
+}
+
+
+/*
+ *  GPIO Forwarder
+ */
+
+struct gpiochip_fwd {
+	struct gpio_chip chip;
+	struct gpio_desc **descs;
+	union {
+		struct mutex mlock;	/* protects tmp[] if can_sleep */
+		spinlock_t slock;	/* protects tmp[] if !can_sleep */
+	};
+	unsigned long tmp[];		/* values and descs for multiple ops */
+};
+
+static int gpio_fwd_get_direction(struct gpio_chip *chip, unsigned int offset)
+{
+	struct gpiochip_fwd *fwd = gpiochip_get_data(chip);
+
+	return gpiod_get_direction(fwd->descs[offset]);
+}
+
+static int gpio_fwd_direction_input(struct gpio_chip *chip, unsigned int offset)
+{
+	struct gpiochip_fwd *fwd = gpiochip_get_data(chip);
+
+	return gpiod_direction_input(fwd->descs[offset]);
+}
+
+static int gpio_fwd_direction_output(struct gpio_chip *chip,
+				     unsigned int offset, int value)
+{
+	struct gpiochip_fwd *fwd = gpiochip_get_data(chip);
+
+	return gpiod_direction_output(fwd->descs[offset], value);
+}
+
+static int gpio_fwd_get(struct gpio_chip *chip, unsigned int offset)
+{
+	struct gpiochip_fwd *fwd = gpiochip_get_data(chip);
+
+	return gpiod_get_value(fwd->descs[offset]);
+}
+
+static int gpio_fwd_get_multiple(struct gpio_chip *chip, unsigned long *mask,
+				 unsigned long *bits)
+{
+	struct gpiochip_fwd *fwd = gpiochip_get_data(chip);
+	unsigned long *values, flags = 0;
+	struct gpio_desc **descs;
+	unsigned int i, j = 0;
+	int error;
+
+	if (chip->can_sleep)
+		mutex_lock(&fwd->mlock);
+	else
+		spin_lock_irqsave(&fwd->slock, flags);
+
+	/* Both values bitmap and desc pointers are stored in tmp[] */
+	values = &fwd->tmp[0];
+	descs = (void *)&fwd->tmp[BITS_TO_LONGS(fwd->chip.ngpio)];
+
+	bitmap_clear(values, 0, fwd->chip.ngpio);
+	for_each_set_bit(i, mask, fwd->chip.ngpio)
+		descs[j++] = fwd->descs[i];
+
+	error = gpiod_get_array_value(j, descs, NULL, values);
+	if (!error) {
+		j = 0;
+		for_each_set_bit(i, mask, fwd->chip.ngpio)
+			__assign_bit(i, bits, test_bit(j++, values));
+	}
+
+	if (chip->can_sleep)
+		mutex_unlock(&fwd->mlock);
+	else
+		spin_unlock_irqrestore(&fwd->slock, flags);
+
+	return error;
+}
+
+static void gpio_fwd_set(struct gpio_chip *chip, unsigned int offset, int value)
+{
+	struct gpiochip_fwd *fwd = gpiochip_get_data(chip);
+
+	gpiod_set_value(fwd->descs[offset], value);
+}
+
+static void gpio_fwd_set_multiple(struct gpio_chip *chip, unsigned long *mask,
+				  unsigned long *bits)
+{
+	struct gpiochip_fwd *fwd = gpiochip_get_data(chip);
+	unsigned long *values, flags = 0;
+	struct gpio_desc **descs;
+	unsigned int i, j = 0;
+
+	if (chip->can_sleep)
+		mutex_lock(&fwd->mlock);
+	else
+		spin_lock_irqsave(&fwd->slock, flags);
+
+	/* Both values bitmap and desc pointers are stored in tmp[] */
+	values = &fwd->tmp[0];
+	descs = (void *)&fwd->tmp[BITS_TO_LONGS(fwd->chip.ngpio)];
+
+	for_each_set_bit(i, mask, fwd->chip.ngpio) {
+		__assign_bit(j, values, test_bit(i, bits));
+		descs[j++] = fwd->descs[i];
+	}
+
+	gpiod_set_array_value(j, descs, NULL, values);
+
+	if (chip->can_sleep)
+		mutex_unlock(&fwd->mlock);
+	else
+		spin_unlock_irqrestore(&fwd->slock, flags);
+}
+
+static int gpio_fwd_set_config(struct gpio_chip *chip, unsigned int offset,
+			       unsigned long config)
+{
+	struct gpiochip_fwd *fwd = gpiochip_get_data(chip);
+
+	return gpiod_set_config(fwd->descs[offset], config);
+}
+
+/**
+ * gpiochip_fwd_create() - Create a new GPIO forwarder
+ * @dev: Parent device pointer
+ * @ngpios: Number of GPIOs in the forwarder.
+ * @descs: Array containing the GPIO descriptors to forward to.
+ *         This array must contain @ngpios entries, and must not be deallocated
+ *         before the forwarder has been destroyed again.
+ *
+ * This function creates a new gpiochip, which forwards all GPIO operations to
+ * the passed GPIO descriptors.
+ *
+ * Return: An opaque object pointer, or an ERR_PTR()-encoded negative error
+ *         code on failure.
+ */
+static struct gpiochip_fwd *gpiochip_fwd_create(struct device *dev,
+						unsigned int ngpios,
+						struct gpio_desc *descs[])
+{
+	const char *label = dev_name(dev);
+	struct gpiochip_fwd *fwd;
+	struct gpio_chip *chip;
+	unsigned int i;
+	int error;
+
+	fwd = devm_kzalloc(dev, struct_size(fwd, tmp,
+			   BITS_TO_LONGS(ngpios) + ngpios), GFP_KERNEL);
+	if (!fwd)
+		return ERR_PTR(-ENOMEM);
+
+	chip = &fwd->chip;
+
+	/*
+	 * If any of the GPIO lines are sleeping, then the entire forwarder
+	 * will be sleeping.
+	 * If any of the chips support .set_config(), then the forwarder will
+	 * support setting configs.
+	 */
+	for (i = 0; i < ngpios; i++) {
+		struct gpio_chip *parent = gpiod_to_chip(descs[i]);
+
+		dev_dbg(dev, "%u => gpio-%d\n", i, desc_to_gpio(descs[i]));
+
+		if (gpiod_cansleep(descs[i]))
+			chip->can_sleep = true;
+		if (parent && parent->set_config)
+			chip->set_config = gpio_fwd_set_config;
+	}
+
+	chip->label = label;
+	chip->parent = dev;
+	chip->owner = THIS_MODULE;
+	chip->get_direction = gpio_fwd_get_direction;
+	chip->direction_input = gpio_fwd_direction_input;
+	chip->direction_output = gpio_fwd_direction_output;
+	chip->get = gpio_fwd_get;
+	chip->get_multiple = gpio_fwd_get_multiple;
+	chip->set = gpio_fwd_set;
+	chip->set_multiple = gpio_fwd_set_multiple;
+	chip->base = -1;
+	chip->ngpio = ngpios;
+	fwd->descs = descs;
+
+	if (chip->can_sleep)
+		mutex_init(&fwd->mlock);
+	else
+		spin_lock_init(&fwd->slock);
+
+	error = devm_gpiochip_add_data(dev, chip, fwd);
+	if (error)
+		return ERR_PTR(error);
+
+	return fwd;
+}
+
+
+/*
+ *  GPIO Aggregator platform device
+ */
+
+static int gpio_aggregator_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct gpio_desc **descs;
+	struct gpiochip_fwd *fwd;
+	int i, n;
+
+	n = gpiod_count(dev, NULL);
+	if (n < 0)
+		return n;
+
+	descs = devm_kmalloc_array(dev, n, sizeof(*descs), GFP_KERNEL);
+	if (!descs)
+		return -ENOMEM;
+
+	for (i = 0; i < n; i++) {
+		descs[i] = devm_gpiod_get_index(dev, NULL, i, GPIOD_ASIS);
+		if (IS_ERR(descs[i]))
+			return PTR_ERR(descs[i]);
+	}
+
+	fwd = gpiochip_fwd_create(dev, n, descs);
+	if (IS_ERR(fwd))
+		return PTR_ERR(fwd);
+
+	platform_set_drvdata(pdev, fwd);
+	return 0;
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id gpio_aggregator_dt_ids[] = {
+	/*
+	 * Add GPIO-operated devices controlled from userspace below,
+	 * or use "driver_override" in sysfs
+	 */
+	{},
+};
+MODULE_DEVICE_TABLE(of, gpio_aggregator_dt_ids);
+#endif
+
+static struct platform_driver gpio_aggregator_driver = {
+	.probe = gpio_aggregator_probe,
+	.driver = {
+		.name = DRV_NAME,
+		.groups = gpio_aggregator_groups,
+		.of_match_table = of_match_ptr(gpio_aggregator_dt_ids),
+	},
+};
+
+static int __init gpio_aggregator_init(void)
+{
+	return platform_driver_register(&gpio_aggregator_driver);
+}
+module_init(gpio_aggregator_init);
+
+static void __exit gpio_aggregator_exit(void)
+{
+	gpio_aggregator_remove_all();
+	platform_driver_unregister(&gpio_aggregator_driver);
+}
+module_exit(gpio_aggregator_exit);
+
+MODULE_AUTHOR("Geert Uytterhoeven <geert+renesas@glider.be>");
+MODULE_DESCRIPTION("GPIO Aggregator");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c
index 92e127e74813..1d8d55bd63aa 100644
--- a/drivers/gpio/gpio-dwapb.c
+++ b/drivers/gpio/gpio-dwapb.c
@@ -49,7 +49,9 @@
 #define GPIO_EXT_PORTC		0x58
 #define GPIO_EXT_PORTD		0x5c
 
+#define DWAPB_DRIVER_NAME	"gpio-dwapb"
 #define DWAPB_MAX_PORTS		4
+
 #define GPIO_EXT_PORT_STRIDE	0x04 /* register stride 32 bits */
 #define GPIO_SWPORT_DR_STRIDE	0x0c /* register stride 3*32 bits */
 #define GPIO_SWPORT_DDR_STRIDE	0x0c /* register stride 3*32 bits */
@@ -62,6 +64,8 @@
 #define GPIO_INTSTATUS_V2	0x3c
 #define GPIO_PORTA_EOI_V2	0x40
 
+#define DWAPB_NR_CLOCKS		2
+
 struct dwapb_gpio;
 
 #ifdef CONFIG_PM_SLEEP
@@ -97,7 +101,7 @@ struct dwapb_gpio {
 	struct irq_domain	*domain;
 	unsigned int		flags;
 	struct reset_control	*rst;
-	struct clk		*clk;
+	struct clk_bulk_data	clks[DWAPB_NR_CLOCKS];
 };
 
 static inline u32 gpio_reg_v2_convert(unsigned int offset)
@@ -189,22 +193,21 @@ static void dwapb_toggle_trigger(struct dwapb_gpio *gpio, unsigned int offs)
 
 static u32 dwapb_do_irq(struct dwapb_gpio *gpio)
 {
-	u32 irq_status = dwapb_read(gpio, GPIO_INTSTATUS);
-	u32 ret = irq_status;
+	unsigned long irq_status;
+	irq_hw_number_t hwirq;
 
-	while (irq_status) {
-		int hwirq = fls(irq_status) - 1;
+	irq_status = dwapb_read(gpio, GPIO_INTSTATUS);
+	for_each_set_bit(hwirq, &irq_status, 32) {
 		int gpio_irq = irq_find_mapping(gpio->domain, hwirq);
+		u32 irq_type = irq_get_trigger_type(gpio_irq);
 
 		generic_handle_irq(gpio_irq);
-		irq_status &= ~BIT(hwirq);
 
-		if ((irq_get_trigger_type(gpio_irq) & IRQ_TYPE_SENSE_MASK)
-			== IRQ_TYPE_EDGE_BOTH)
+		if ((irq_type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH)
 			dwapb_toggle_trigger(gpio, hwirq);
 	}
 
-	return ret;
+	return irq_status;
 }
 
 static void dwapb_irq_handler(struct irq_desc *desc)
@@ -212,10 +215,9 @@ static void dwapb_irq_handler(struct irq_desc *desc)
 	struct dwapb_gpio *gpio = irq_desc_get_handler_data(desc);
 	struct irq_chip *chip = irq_desc_get_chip(desc);
 
+	chained_irq_enter(chip, desc);
 	dwapb_do_irq(gpio);
-
-	if (chip->irq_eoi)
-		chip->irq_eoi(irq_desc_get_irq_data(desc));
+	chained_irq_exit(chip, desc);
 }
 
 static void dwapb_irq_enable(struct irq_data *d)
@@ -228,7 +230,7 @@ static void dwapb_irq_enable(struct irq_data *d)
 
 	spin_lock_irqsave(&gc->bgpio_lock, flags);
 	val = dwapb_read(gpio, GPIO_INTEN);
-	val |= BIT(d->hwirq);
+	val |= BIT(irqd_to_hwirq(d));
 	dwapb_write(gpio, GPIO_INTEN, val);
 	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
 }
@@ -243,46 +245,20 @@ static void dwapb_irq_disable(struct irq_data *d)
 
 	spin_lock_irqsave(&gc->bgpio_lock, flags);
 	val = dwapb_read(gpio, GPIO_INTEN);
-	val &= ~BIT(d->hwirq);
+	val &= ~BIT(irqd_to_hwirq(d));
 	dwapb_write(gpio, GPIO_INTEN, val);
 	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
 }
 
-static int dwapb_irq_reqres(struct irq_data *d)
-{
-	struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
-	struct dwapb_gpio *gpio = igc->private;
-	struct gpio_chip *gc = &gpio->ports[0].gc;
-	int ret;
-
-	ret = gpiochip_lock_as_irq(gc, irqd_to_hwirq(d));
-	if (ret) {
-		dev_err(gpio->dev, "unable to lock HW IRQ %lu for IRQ\n",
-			irqd_to_hwirq(d));
-		return ret;
-	}
-	return 0;
-}
-
-static void dwapb_irq_relres(struct irq_data *d)
-{
-	struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
-	struct dwapb_gpio *gpio = igc->private;
-	struct gpio_chip *gc = &gpio->ports[0].gc;
-
-	gpiochip_unlock_as_irq(gc, irqd_to_hwirq(d));
-}
-
 static int dwapb_irq_set_type(struct irq_data *d, u32 type)
 {
 	struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
 	struct dwapb_gpio *gpio = igc->private;
 	struct gpio_chip *gc = &gpio->ports[0].gc;
-	int bit = d->hwirq;
+	irq_hw_number_t bit = irqd_to_hwirq(d);
 	unsigned long level, polarity, flags;
 
-	if (type & ~(IRQ_TYPE_EDGE_RISING | IRQ_TYPE_EDGE_FALLING |
-		     IRQ_TYPE_LEVEL_HIGH | IRQ_TYPE_LEVEL_LOW))
+	if (type & ~IRQ_TYPE_SENSE_MASK)
 		return -EINVAL;
 
 	spin_lock_irqsave(&gc->bgpio_lock, flags);
@@ -328,11 +304,12 @@ static int dwapb_irq_set_wake(struct irq_data *d, unsigned int enable)
 	struct irq_chip_generic *igc = irq_data_get_irq_chip_data(d);
 	struct dwapb_gpio *gpio = igc->private;
 	struct dwapb_context *ctx = gpio->ports[0].ctx;
+	irq_hw_number_t bit = irqd_to_hwirq(d);
 
 	if (enable)
-		ctx->wake_en |= BIT(d->hwirq);
+		ctx->wake_en |= BIT(bit);
 	else
-		ctx->wake_en &= ~BIT(d->hwirq);
+		ctx->wake_en &= ~BIT(bit);
 
 	return 0;
 }
@@ -350,9 +327,10 @@ static int dwapb_gpio_set_debounce(struct gpio_chip *gc,
 
 	val_deb = dwapb_read(gpio, GPIO_PORTA_DEBOUNCE);
 	if (debounce)
-		dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, val_deb | mask);
+		val_deb |= mask;
 	else
-		dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, val_deb & ~mask);
+		val_deb &= ~mask;
+	dwapb_write(gpio, GPIO_PORTA_DEBOUNCE, val_deb);
 
 	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
 
@@ -373,12 +351,7 @@ static int dwapb_gpio_set_config(struct gpio_chip *gc, unsigned offset,
 
 static irqreturn_t dwapb_irq_handler_mfd(int irq, void *dev_id)
 {
-	u32 worked;
-	struct dwapb_gpio *gpio = dev_id;
-
-	worked = dwapb_do_irq(gpio);
-
-	return worked ? IRQ_HANDLED : IRQ_NONE;
+	return IRQ_RETVAL(dwapb_do_irq(dev_id));
 }
 
 static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
@@ -388,17 +361,23 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
 	struct gpio_chip *gc = &port->gc;
 	struct fwnode_handle  *fwnode = pp->fwnode;
 	struct irq_chip_generic	*irq_gc = NULL;
-	unsigned int hwirq, ngpio = gc->ngpio;
+	unsigned int ngpio = gc->ngpio;
 	struct irq_chip_type *ct;
+	irq_hw_number_t hwirq;
 	int err, i;
 
+	if (memchr_inv(pp->irq, 0, sizeof(pp->irq)) == NULL) {
+		dev_warn(gpio->dev, "no IRQ for port%d\n", pp->idx);
+		return;
+	}
+
 	gpio->domain = irq_domain_create_linear(fwnode, ngpio,
 						 &irq_generic_chip_ops, gpio);
 	if (!gpio->domain)
 		return;
 
 	err = irq_alloc_domain_generic_chips(gpio->domain, ngpio, 2,
-					     "gpio-dwapb", handle_level_irq,
+					     DWAPB_DRIVER_NAME, handle_bad_irq,
 					     IRQ_NOREQUEST, 0,
 					     IRQ_GC_INIT_NESTED_LOCK);
 	if (err) {
@@ -426,8 +405,6 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
 		ct->chip.irq_set_type = dwapb_irq_set_type;
 		ct->chip.irq_enable = dwapb_irq_enable;
 		ct->chip.irq_disable = dwapb_irq_disable;
-		ct->chip.irq_request_resources = dwapb_irq_reqres;
-		ct->chip.irq_release_resources = dwapb_irq_relres;
 #ifdef CONFIG_PM_SLEEP
 		ct->chip.irq_set_wake = dwapb_irq_set_wake;
 #endif
@@ -437,6 +414,7 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
 	}
 
 	irq_gc->chip_types[0].type = IRQ_TYPE_LEVEL_MASK;
+	irq_gc->chip_types[0].handler = handle_level_irq;
 	irq_gc->chip_types[1].type = IRQ_TYPE_EDGE_BOTH;
 	irq_gc->chip_types[1].handler = handle_edge_irq;
 
@@ -444,7 +422,7 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
 		int i;
 
 		for (i = 0; i < pp->ngpio; i++) {
-			if (pp->irq[i] >= 0)
+			if (pp->irq[i])
 				irq_set_chained_handler_and_data(pp->irq[i],
 						dwapb_irq_handler, gpio);
 		}
@@ -455,7 +433,7 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
 		 */
 		err = devm_request_irq(gpio->dev, pp->irq[0],
 				       dwapb_irq_handler_mfd,
-				       IRQF_SHARED, "gpio-dwapb-mfd", gpio);
+				       IRQF_SHARED, DWAPB_DRIVER_NAME, gpio);
 		if (err) {
 			dev_err(gpio->dev, "error requesting IRQ\n");
 			irq_domain_remove(gpio->domain);
@@ -464,7 +442,7 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio,
 		}
 	}
 
-	for (hwirq = 0 ; hwirq < ngpio ; hwirq++)
+	for (hwirq = 0; hwirq < ngpio; hwirq++)
 		irq_create_mapping(gpio->domain, hwirq);
 
 	port->gc.to_irq = dwapb_gpio_to_irq;
@@ -480,7 +458,7 @@ static void dwapb_irq_teardown(struct dwapb_gpio *gpio)
 	if (!gpio->domain)
 		return;
 
-	for (hwirq = 0 ; hwirq < ngpio ; hwirq++)
+	for (hwirq = 0; hwirq < ngpio; hwirq++)
 		irq_dispose_mapping(irq_find_mapping(gpio->domain, hwirq));
 
 	irq_domain_remove(gpio->domain);
@@ -505,10 +483,9 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
 		return -ENOMEM;
 #endif
 
-	dat = gpio->regs + GPIO_EXT_PORTA + (pp->idx * GPIO_EXT_PORT_STRIDE);
-	set = gpio->regs + GPIO_SWPORTA_DR + (pp->idx * GPIO_SWPORT_DR_STRIDE);
-	dirout = gpio->regs + GPIO_SWPORTA_DDR +
-		(pp->idx * GPIO_SWPORT_DDR_STRIDE);
+	dat = gpio->regs + GPIO_EXT_PORTA + pp->idx * GPIO_EXT_PORT_STRIDE;
+	set = gpio->regs + GPIO_SWPORTA_DR + pp->idx * GPIO_SWPORT_DR_STRIDE;
+	dirout = gpio->regs + GPIO_SWPORTA_DDR + pp->idx * GPIO_SWPORT_DDR_STRIDE;
 
 	/* This registers 32 GPIO lines per port */
 	err = bgpio_init(&port->gc, gpio->dev, 4, dat, set, NULL, dirout,
@@ -529,40 +506,66 @@ static int dwapb_gpio_add_port(struct dwapb_gpio *gpio,
 	if (pp->idx == 0)
 		port->gc.set_config = dwapb_gpio_set_config;
 
-	if (pp->has_irq)
+	/* Only port A can provide interrupts in all configurations of the IP */
+	if (pp->idx == 0)
 		dwapb_configure_irqs(gpio, port, pp);
 
 	err = gpiochip_add_data(&port->gc, port);
-	if (err)
+	if (err) {
 		dev_err(gpio->dev, "failed to register gpiochip for port%d\n",
 			port->idx);
-	else
-		port->is_registered = true;
+		return err;
+	}
 
 	/* Add GPIO-signaled ACPI event support */
-	if (pp->has_irq)
-		acpi_gpiochip_request_interrupts(&port->gc);
+	acpi_gpiochip_request_interrupts(&port->gc);
 
-	return err;
+	port->is_registered = true;
+
+	return 0;
 }
 
 static void dwapb_gpio_unregister(struct dwapb_gpio *gpio)
 {
 	unsigned int m;
 
-	for (m = 0; m < gpio->nr_ports; ++m)
-		if (gpio->ports[m].is_registered)
-			gpiochip_remove(&gpio->ports[m].gc);
+	for (m = 0; m < gpio->nr_ports; ++m) {
+		struct dwapb_gpio_port *port = &gpio->ports[m];
+
+		if (!port->is_registered)
+			continue;
+
+		acpi_gpiochip_free_interrupts(&port->gc);
+		gpiochip_remove(&port->gc);
+	}
+}
+
+static void dwapb_get_irq(struct device *dev, struct fwnode_handle *fwnode,
+			  struct dwapb_port_property *pp)
+{
+	struct device_node *np = NULL;
+	int irq = -ENXIO, j;
+
+	if (fwnode_property_read_bool(fwnode, "interrupt-controller"))
+		np = to_of_node(fwnode);
+
+	for (j = 0; j < pp->ngpio; j++) {
+		if (np)
+			irq = of_irq_get(np, j);
+		else if (has_acpi_companion(dev))
+			irq = platform_get_irq_optional(to_platform_device(dev), j);
+		if (irq > 0)
+			pp->irq[j] = irq;
+	}
 }
 
-static struct dwapb_platform_data *
-dwapb_gpio_get_pdata(struct device *dev)
+static struct dwapb_platform_data *dwapb_gpio_get_pdata(struct device *dev)
 {
 	struct fwnode_handle *fwnode;
 	struct dwapb_platform_data *pdata;
 	struct dwapb_port_property *pp;
 	int nports;
-	int i, j;
+	int i;
 
 	nports = device_get_child_node_count(dev);
 	if (nports == 0)
@@ -580,8 +583,6 @@ dwapb_gpio_get_pdata(struct device *dev)
 
 	i = 0;
 	device_for_each_child_node(dev, fwnode)  {
-		struct device_node *np = NULL;
-
 		pp = &pdata->properties[i++];
 		pp->fwnode = fwnode;
 
@@ -593,8 +594,7 @@ dwapb_gpio_get_pdata(struct device *dev)
 			return ERR_PTR(-EINVAL);
 		}
 
-		if (fwnode_property_read_u32(fwnode, "snps,nr-gpios",
-					 &pp->ngpio)) {
+		if (fwnode_property_read_u32(fwnode, "snps,nr-gpios", &pp->ngpio)) {
 			dev_info(dev,
 				 "failed to get number of gpios for port%d\n",
 				 i);
@@ -608,28 +608,8 @@ dwapb_gpio_get_pdata(struct device *dev)
 		 * Only port A can provide interrupts in all configurations of
 		 * the IP.
 		 */
-		if (pp->idx != 0)
-			continue;
-
-		if (dev->of_node && fwnode_property_read_bool(fwnode,
-						  "interrupt-controller")) {
-			np = to_of_node(fwnode);
-		}
-
-		for (j = 0; j < pp->ngpio; j++) {
-			pp->irq[j] = -ENXIO;
-
-			if (np)
-				pp->irq[j] = of_irq_get(np, j);
-			else if (has_acpi_companion(dev))
-				pp->irq[j] = platform_get_irq(to_platform_device(dev), j);
-
-			if (pp->irq[j] >= 0)
-				pp->has_irq = true;
-		}
-
-		if (!pp->has_irq)
-			dev_warn(dev, "no irq for port%d\n", pp->idx);
+		if (pp->idx == 0)
+			dwapb_get_irq(dev, fwnode, pp);
 	}
 
 	return pdata;
@@ -689,29 +669,24 @@ static int dwapb_gpio_probe(struct platform_device *pdev)
 	if (IS_ERR(gpio->regs))
 		return PTR_ERR(gpio->regs);
 
-	/* Optional bus clock */
-	gpio->clk = devm_clk_get(&pdev->dev, "bus");
-	if (!IS_ERR(gpio->clk)) {
-		err = clk_prepare_enable(gpio->clk);
-		if (err) {
-			dev_info(&pdev->dev, "Cannot enable clock\n");
-			return err;
-		}
+	/* Optional bus and debounce clocks */
+	gpio->clks[0].id = "bus";
+	gpio->clks[1].id = "db";
+	err = devm_clk_bulk_get_optional(&pdev->dev, DWAPB_NR_CLOCKS,
+					 gpio->clks);
+	if (err) {
+		dev_err(&pdev->dev, "Cannot get APB/Debounce clocks\n");
+		return err;
 	}
 
-	gpio->flags = 0;
-	if (dev->of_node) {
-		gpio->flags = (uintptr_t)of_device_get_match_data(dev);
-	} else if (has_acpi_companion(dev)) {
-		const struct acpi_device_id *acpi_id;
-
-		acpi_id = acpi_match_device(dwapb_acpi_match, dev);
-		if (acpi_id) {
-			if (acpi_id->driver_data)
-				gpio->flags = acpi_id->driver_data;
-		}
+	err = clk_bulk_prepare_enable(DWAPB_NR_CLOCKS, gpio->clks);
+	if (err) {
+		dev_err(&pdev->dev, "Cannot enable APB/Debounce clocks\n");
+		return err;
 	}
 
+	gpio->flags = (uintptr_t)device_get_match_data(dev);
+
 	for (i = 0; i < gpio->nr_ports; i++) {
 		err = dwapb_gpio_add_port(gpio, &pdata->properties[i], i);
 		if (err)
@@ -724,7 +699,7 @@ static int dwapb_gpio_probe(struct platform_device *pdev)
 out_unregister:
 	dwapb_gpio_unregister(gpio);
 	dwapb_irq_teardown(gpio);
-	clk_disable_unprepare(gpio->clk);
+	clk_bulk_disable_unprepare(DWAPB_NR_CLOCKS, gpio->clks);
 
 	return err;
 }
@@ -736,7 +711,7 @@ static int dwapb_gpio_remove(struct platform_device *pdev)
 	dwapb_gpio_unregister(gpio);
 	dwapb_irq_teardown(gpio);
 	reset_control_assert(gpio->rst);
-	clk_disable_unprepare(gpio->clk);
+	clk_bulk_disable_unprepare(DWAPB_NR_CLOCKS, gpio->clks);
 
 	return 0;
 }
@@ -755,8 +730,6 @@ static int dwapb_gpio_suspend(struct device *dev)
 		unsigned int idx = gpio->ports[i].idx;
 		struct dwapb_context *ctx = gpio->ports[i].ctx;
 
-		BUG_ON(!ctx);
-
 		offset = GPIO_SWPORTA_DDR + idx * GPIO_SWPORT_DDR_STRIDE;
 		ctx->dir = dwapb_read(gpio, offset);
 
@@ -775,13 +748,12 @@ static int dwapb_gpio_suspend(struct device *dev)
 			ctx->int_deb	= dwapb_read(gpio, GPIO_PORTA_DEBOUNCE);
 
 			/* Mask out interrupts */
-			dwapb_write(gpio, GPIO_INTMASK,
-				    0xffffffff & ~ctx->wake_en);
+			dwapb_write(gpio, GPIO_INTMASK, ~ctx->wake_en);
 		}
 	}
 	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
 
-	clk_disable_unprepare(gpio->clk);
+	clk_bulk_disable_unprepare(DWAPB_NR_CLOCKS, gpio->clks);
 
 	return 0;
 }
@@ -791,10 +763,13 @@ static int dwapb_gpio_resume(struct device *dev)
 	struct dwapb_gpio *gpio = dev_get_drvdata(dev);
 	struct gpio_chip *gc	= &gpio->ports[0].gc;
 	unsigned long flags;
-	int i;
+	int i, err;
 
-	if (!IS_ERR(gpio->clk))
-		clk_prepare_enable(gpio->clk);
+	err = clk_bulk_prepare_enable(DWAPB_NR_CLOCKS, gpio->clks);
+	if (err) {
+		dev_err(gpio->dev, "Cannot reenable APB/Debounce clocks\n");
+		return err;
+	}
 
 	spin_lock_irqsave(&gc->bgpio_lock, flags);
 	for (i = 0; i < gpio->nr_ports; i++) {
@@ -802,8 +777,6 @@ static int dwapb_gpio_resume(struct device *dev)
 		unsigned int idx = gpio->ports[i].idx;
 		struct dwapb_context *ctx = gpio->ports[i].ctx;
 
-		BUG_ON(!ctx);
-
 		offset = GPIO_SWPORTA_DR + idx * GPIO_SWPORT_DR_STRIDE;
 		dwapb_write(gpio, offset, ctx->data);
 
@@ -836,10 +809,10 @@ static SIMPLE_DEV_PM_OPS(dwapb_gpio_pm_ops, dwapb_gpio_suspend,
 
 static struct platform_driver dwapb_gpio_driver = {
 	.driver		= {
-		.name	= "gpio-dwapb",
+		.name	= DWAPB_DRIVER_NAME,
 		.pm	= &dwapb_gpio_pm_ops,
-		.of_match_table = of_match_ptr(dwapb_of_match),
-		.acpi_match_table = ACPI_PTR(dwapb_acpi_match),
+		.of_match_table = dwapb_of_match,
+		.acpi_match_table = dwapb_acpi_match,
 	},
 	.probe		= dwapb_gpio_probe,
 	.remove		= dwapb_gpio_remove,
@@ -850,3 +823,4 @@ module_platform_driver(dwapb_gpio_driver);
 MODULE_LICENSE("GPL");
 MODULE_AUTHOR("Jamie Iles");
 MODULE_DESCRIPTION("Synopsys DesignWare APB GPIO driver");
+MODULE_ALIAS("platform:" DWAPB_DRIVER_NAME);
diff --git a/drivers/gpio/gpio-f7188x.c b/drivers/gpio/gpio-f7188x.c
index cadd02993539..18a3147f5a42 100644
--- a/drivers/gpio/gpio-f7188x.c
+++ b/drivers/gpio/gpio-f7188x.c
@@ -36,9 +36,19 @@
 #define SIO_F71889A_ID		0x1005	/* F71889A chipset ID */
 #define SIO_F81866_ID		0x1010	/* F81866 chipset ID */
 #define SIO_F81804_ID		0x1502  /* F81804 chipset ID, same for f81966 */
-
-
-enum chips { f71869, f71869a, f71882fg, f71889a, f71889f, f81866, f81804 };
+#define SIO_F81865_ID		0x0704	/* F81865 chipset ID */
+
+
+enum chips {
+	f71869,
+	f71869a,
+	f71882fg,
+	f71889a,
+	f71889f,
+	f81866,
+	f81804,
+	f81865,
+};
 
 static const char * const f7188x_names[] = {
 	"f71869",
@@ -48,6 +58,7 @@ static const char * const f7188x_names[] = {
 	"f71889f",
 	"f81866",
 	"f81804",
+	"f81865",
 };
 
 struct f7188x_sio {
@@ -233,6 +244,15 @@ static struct f7188x_gpio_bank f81804_gpio_bank[] = {
 	F7188X_GPIO_BANK(90, 8, 0x98),
 };
 
+static struct f7188x_gpio_bank f81865_gpio_bank[] = {
+	F7188X_GPIO_BANK(0, 8, 0xF0),
+	F7188X_GPIO_BANK(10, 8, 0xE0),
+	F7188X_GPIO_BANK(20, 8, 0xD0),
+	F7188X_GPIO_BANK(30, 8, 0xC0),
+	F7188X_GPIO_BANK(40, 8, 0xB0),
+	F7188X_GPIO_BANK(50, 8, 0xA0),
+	F7188X_GPIO_BANK(60, 5, 0x90),
+};
 
 static int f7188x_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
 {
@@ -425,6 +445,10 @@ static int f7188x_gpio_probe(struct platform_device *pdev)
 		data->nr_bank = ARRAY_SIZE(f81804_gpio_bank);
 		data->bank = f81804_gpio_bank;
 		break;
+	case f81865:
+		data->nr_bank = ARRAY_SIZE(f81865_gpio_bank);
+		data->bank = f81865_gpio_bank;
+		break;
 	default:
 		return -ENODEV;
 	}
@@ -490,6 +514,9 @@ static int __init f7188x_find(int addr, struct f7188x_sio *sio)
 	case SIO_F81804_ID:
 		sio->type = f81804;
 		break;
+	case SIO_F81865_ID:
+		sio->type = f81865;
+		break;
 	default:
 		pr_info(DRVNAME ": Unsupported Fintek device 0x%04x\n", devid);
 		goto err;
diff --git a/drivers/gpio/gpio-ftgpio010.c b/drivers/gpio/gpio-ftgpio010.c
index fbddb1662428..4031164780f7 100644
--- a/drivers/gpio/gpio-ftgpio010.c
+++ b/drivers/gpio/gpio-ftgpio010.c
@@ -193,7 +193,7 @@ static int ftgpio_gpio_set_config(struct gpio_chip *gc, unsigned int offset,
 	if (val == deb_div) {
 		/*
 		 * The debounce timer happens to already be set to the
-		 * desireable value, what a coincidence! We can just enable
+		 * desirable value, what a coincidence! We can just enable
 		 * debounce on this GPIO line and return. This happens more
 		 * often than you think, for example when all GPIO keys
 		 * on a system are requesting the same debounce interval.
diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c
index 2f086d0aa1f4..9960bb8b0f5b 100644
--- a/drivers/gpio/gpio-ich.c
+++ b/drivers/gpio/gpio-ich.c
@@ -89,7 +89,7 @@ static struct {
 	struct device *dev;
 	struct gpio_chip chip;
 	struct resource *gpio_base;	/* GPIO IO base */
-	struct resource *pm_base;	/* Power Mangagment IO base */
+	struct resource *pm_base;	/* Power Management IO base */
 	struct ichx_desc *desc;	/* Pointer to chipset-specific description */
 	u32 orig_gpio_ctrl;	/* Orig CTRL value, used to restore on exit */
 	u8 use_gpio;		/* Which GPIO groups are usable */
diff --git a/drivers/gpio/gpio-max730x.c b/drivers/gpio/gpio-max730x.c
index 1e1935c51096..b8c1fe20f49a 100644
--- a/drivers/gpio/gpio-max730x.c
+++ b/drivers/gpio/gpio-max730x.c
@@ -47,7 +47,7 @@
 
 static int max7301_direction_input(struct gpio_chip *chip, unsigned offset)
 {
-	struct max7301 *ts = gpiochip_get_data(chip);
+	struct max7301 *ts = container_of(chip, struct max7301, chip);
 	u8 *config;
 	u8 offset_bits, pin_config;
 	int ret;
@@ -89,7 +89,7 @@ static int __max7301_set(struct max7301 *ts, unsigned offset, int value)
 static int max7301_direction_output(struct gpio_chip *chip, unsigned offset,
 				    int value)
 {
-	struct max7301 *ts = gpiochip_get_data(chip);
+	struct max7301 *ts = container_of(chip, struct max7301, chip);
 	u8 *config;
 	u8 offset_bits;
 	int ret;
@@ -189,10 +189,6 @@ int __max730x_probe(struct max7301 *ts)
 	ts->chip.parent = dev;
 	ts->chip.owner = THIS_MODULE;
 
-	ret = gpiochip_add_data(&ts->chip, ts);
-	if (ret)
-		goto exit_destroy;
-
 	/*
 	 * initialize pullups according to platform data and cache the
 	 * register values for later use.
@@ -214,7 +210,9 @@ int __max730x_probe(struct max7301 *ts)
 		}
 	}
 
-	return ret;
+	ret = gpiochip_add_data(&ts->chip, ts);
+	if (!ret)
+		return ret;
 
 exit_destroy:
 	mutex_destroy(&ts->lock);
diff --git a/drivers/gpio/gpio-mb86s7x.c b/drivers/gpio/gpio-mb86s7x.c
index 501e89548f53..37c5363e391e 100644
--- a/drivers/gpio/gpio-mb86s7x.c
+++ b/drivers/gpio/gpio-mb86s7x.c
@@ -145,7 +145,9 @@ static int mb86s70_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)
 
 	for (index = 0;; index++) {
 		irq = platform_get_irq(to_platform_device(gc->parent), index);
-		if (irq <= 0)
+		if (irq < 0)
+			return irq;
+		if (irq == 0)
 			break;
 		if (irq_get_irq_data(irq)->hwirq == offset)
 			return irq;
@@ -168,15 +170,13 @@ static int mb86s70_gpio_probe(struct platform_device *pdev)
 	if (IS_ERR(gchip->base))
 		return PTR_ERR(gchip->base);
 
-	if (!has_acpi_companion(&pdev->dev)) {
-		gchip->clk = devm_clk_get(&pdev->dev, NULL);
-		if (IS_ERR(gchip->clk))
-			return PTR_ERR(gchip->clk);
+	gchip->clk = devm_clk_get_optional(&pdev->dev, NULL);
+	if (IS_ERR(gchip->clk))
+		return PTR_ERR(gchip->clk);
 
-		ret = clk_prepare_enable(gchip->clk);
-		if (ret)
-			return ret;
-	}
+	ret = clk_prepare_enable(gchip->clk);
+	if (ret)
+		return ret;
 
 	spin_lock_init(&gchip->lock);
 
@@ -186,15 +186,13 @@ static int mb86s70_gpio_probe(struct platform_device *pdev)
 	gchip->gc.free = mb86s70_gpio_free;
 	gchip->gc.get = mb86s70_gpio_get;
 	gchip->gc.set = mb86s70_gpio_set;
+	gchip->gc.to_irq = mb86s70_gpio_to_irq;
 	gchip->gc.label = dev_name(&pdev->dev);
 	gchip->gc.ngpio = 32;
 	gchip->gc.owner = THIS_MODULE;
 	gchip->gc.parent = &pdev->dev;
 	gchip->gc.base = -1;
 
-	if (has_acpi_companion(&pdev->dev))
-		gchip->gc.to_irq = mb86s70_gpio_to_irq;
-
 	ret = gpiochip_add_data(&gchip->gc, gchip);
 	if (ret) {
 		dev_err(&pdev->dev, "couldn't register gpio driver\n");
@@ -202,8 +200,7 @@ static int mb86s70_gpio_probe(struct platform_device *pdev)
 		return ret;
 	}
 
-	if (has_acpi_companion(&pdev->dev))
-		acpi_gpiochip_request_interrupts(&gchip->gc);
+	acpi_gpiochip_request_interrupts(&gchip->gc);
 
 	return 0;
 }
@@ -212,8 +209,7 @@ static int mb86s70_gpio_remove(struct platform_device *pdev)
 {
 	struct mb86s70_gpio_chip *gchip = platform_get_drvdata(pdev);
 
-	if (has_acpi_companion(&pdev->dev))
-		acpi_gpiochip_free_interrupts(&gchip->gc);
+	acpi_gpiochip_free_interrupts(&gchip->gc);
 	gpiochip_remove(&gchip->gc);
 	clk_disable_unprepare(gchip->clk);
 
diff --git a/drivers/gpio/gpio-merrifield.c b/drivers/gpio/gpio-merrifield.c
index 48918a016cd8..706687fab634 100644
--- a/drivers/gpio/gpio-merrifield.c
+++ b/drivers/gpio/gpio-merrifield.c
@@ -443,8 +443,8 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
 
 	base = pcim_iomap_table(pdev)[1];
 
-	irq_base = readl(base);
-	gpio_base = readl(sizeof(u32) + base);
+	irq_base = readl(base + 0 * sizeof(u32));
+	gpio_base = readl(base + 1 * sizeof(u32));
 
 	/* Release the IO mapping, since we already get the info from BAR1 */
 	pcim_iounmap_regions(pdev, BIT(1));
@@ -473,6 +473,10 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
 
 	raw_spin_lock_init(&priv->lock);
 
+	retval = pci_alloc_irq_vectors(pdev, 1, 1, PCI_IRQ_ALL_TYPES);
+	if (retval < 0)
+		return retval;
+
 	girq = &priv->chip.irq;
 	girq->chip = &mrfld_irqchip;
 	girq->init_hw = mrfld_irq_init_hw;
@@ -482,7 +486,7 @@ static int mrfld_gpio_probe(struct pci_dev *pdev, const struct pci_device_id *id
 				     sizeof(*girq->parents), GFP_KERNEL);
 	if (!girq->parents)
 		return -ENOMEM;
-	girq->parents[0] = pdev->irq;
+	girq->parents[0] = pci_irq_vector(pdev, 0);
 	girq->first = irq_base;
 	girq->default_type = IRQ_TYPE_NONE;
 	girq->handler = handle_bad_irq;
diff --git a/drivers/gpio/gpio-mlxbf2.c b/drivers/gpio/gpio-mlxbf2.c
index da570e63589d..94d5efce1721 100644
--- a/drivers/gpio/gpio-mlxbf2.c
+++ b/drivers/gpio/gpio-mlxbf2.c
@@ -14,7 +14,6 @@
 #include <linux/resource.h>
 #include <linux/spinlock.h>
 #include <linux/types.h>
-#include <linux/version.h>
 
 /*
  * There are 3 YU GPIO blocks:
@@ -110,8 +109,8 @@ static int mlxbf2_gpio_get_lock_res(struct platform_device *pdev)
 	}
 
 	yu_arm_gpio_lock_param.io = devm_ioremap(dev, res->start, size);
-	if (IS_ERR(yu_arm_gpio_lock_param.io))
-		ret = PTR_ERR(yu_arm_gpio_lock_param.io);
+	if (!yu_arm_gpio_lock_param.io)
+		ret = -ENOMEM;
 
 exit:
 	mutex_unlock(yu_arm_gpio_lock_param.lock);
diff --git a/drivers/gpio/gpio-mm-lantiq.c b/drivers/gpio/gpio-mm-lantiq.c
index f460d71b0c92..538e31fe8903 100644
--- a/drivers/gpio/gpio-mm-lantiq.c
+++ b/drivers/gpio/gpio-mm-lantiq.c
@@ -36,7 +36,7 @@ struct ltq_mm {
  * @chip:     Pointer to our private data structure.
  *
  * Write the shadow value to the EBU to set the gpios. We need to set the
- * global EBU lock to make sure that PCI/MTD dont break.
+ * global EBU lock to make sure that PCI/MTD don't break.
  */
 static void ltq_mm_apply(struct ltq_mm *chip)
 {
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c
index 4269ea9a817e..1fca8dd7824f 100644
--- a/drivers/gpio/gpio-pca953x.c
+++ b/drivers/gpio/gpio-pca953x.c
@@ -306,37 +306,39 @@ static const struct regmap_config pca953x_i2c_regmap = {
 	.writeable_reg = pca953x_writeable_register,
 	.volatile_reg = pca953x_volatile_register,
 
+	.disable_locking = true,
 	.cache_type = REGCACHE_RBTREE,
-	/* REVISIT: should be 0x7f but some 24 bit chips use REG_ADDR_AI */
-	.max_register = 0xff,
+	.max_register = 0x7f,
 };
 
-static u8 pca953x_recalc_addr(struct pca953x_chip *chip, int reg, int off,
-			      bool write, bool addrinc)
+static const struct regmap_config pca953x_ai_i2c_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.read_flag_mask = REG_ADDR_AI,
+	.write_flag_mask = REG_ADDR_AI,
+
+	.readable_reg = pca953x_readable_register,
+	.writeable_reg = pca953x_writeable_register,
+	.volatile_reg = pca953x_volatile_register,
+
+	.cache_type = REGCACHE_RBTREE,
+	.max_register = 0x7f,
+};
+
+static u8 pca953x_recalc_addr(struct pca953x_chip *chip, int reg, int off)
 {
 	int bank_shift = pca953x_bank_shift(chip);
 	int addr = (reg & PCAL_GPIO_MASK) << bank_shift;
 	int pinctrl = (reg & PCAL_PINCTRL_MASK) << 1;
 	u8 regaddr = pinctrl | addr | (off / BANK_SZ);
 
-	/* Single byte read doesn't need AI bit set. */
-	if (!addrinc)
-		return regaddr;
-
-	/* Chips with 24 and more GPIOs always support Auto Increment */
-	if (write && NBANK(chip) > 2)
-		regaddr |= REG_ADDR_AI;
-
-	/* PCA9575 needs address-increment on multi-byte writes */
-	if (PCA_CHIP_TYPE(chip->driver_data) == PCA957X_TYPE)
-		regaddr |= REG_ADDR_AI;
-
 	return regaddr;
 }
 
 static int pca953x_write_regs(struct pca953x_chip *chip, int reg, unsigned long *val)
 {
-	u8 regaddr = pca953x_recalc_addr(chip, reg, 0, true, true);
+	u8 regaddr = pca953x_recalc_addr(chip, reg, 0);
 	u8 value[MAX_BANK];
 	int i, ret;
 
@@ -354,7 +356,7 @@ static int pca953x_write_regs(struct pca953x_chip *chip, int reg, unsigned long
 
 static int pca953x_read_regs(struct pca953x_chip *chip, int reg, unsigned long *val)
 {
-	u8 regaddr = pca953x_recalc_addr(chip, reg, 0, false, true);
+	u8 regaddr = pca953x_recalc_addr(chip, reg, 0);
 	u8 value[MAX_BANK];
 	int i, ret;
 
@@ -373,8 +375,7 @@ static int pca953x_read_regs(struct pca953x_chip *chip, int reg, unsigned long *
 static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off)
 {
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
-	u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off,
-					true, false);
+	u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off);
 	u8 bit = BIT(off % BANK_SZ);
 	int ret;
 
@@ -388,10 +389,8 @@ static int pca953x_gpio_direction_output(struct gpio_chip *gc,
 		unsigned off, int val)
 {
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
-	u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off,
-					true, false);
-	u8 outreg = pca953x_recalc_addr(chip, chip->regs->output, off,
-					true, false);
+	u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off);
+	u8 outreg = pca953x_recalc_addr(chip, chip->regs->output, off);
 	u8 bit = BIT(off % BANK_SZ);
 	int ret;
 
@@ -411,8 +410,7 @@ exit:
 static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
 {
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
-	u8 inreg = pca953x_recalc_addr(chip, chip->regs->input, off,
-				       true, false);
+	u8 inreg = pca953x_recalc_addr(chip, chip->regs->input, off);
 	u8 bit = BIT(off % BANK_SZ);
 	u32 reg_val;
 	int ret;
@@ -436,8 +434,7 @@ static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off)
 static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
 {
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
-	u8 outreg = pca953x_recalc_addr(chip, chip->regs->output, off,
-					true, false);
+	u8 outreg = pca953x_recalc_addr(chip, chip->regs->output, off);
 	u8 bit = BIT(off % BANK_SZ);
 
 	mutex_lock(&chip->i2c_lock);
@@ -448,8 +445,7 @@ static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
 static int pca953x_gpio_get_direction(struct gpio_chip *gc, unsigned off)
 {
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
-	u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off,
-					true, false);
+	u8 dirreg = pca953x_recalc_addr(chip, chip->regs->direction, off);
 	u8 bit = BIT(off % BANK_SZ);
 	u32 reg_val;
 	int ret;
@@ -466,6 +462,23 @@ static int pca953x_gpio_get_direction(struct gpio_chip *gc, unsigned off)
 	return GPIO_LINE_DIRECTION_OUT;
 }
 
+static int pca953x_gpio_get_multiple(struct gpio_chip *gc,
+				     unsigned long *mask, unsigned long *bits)
+{
+	struct pca953x_chip *chip = gpiochip_get_data(gc);
+	DECLARE_BITMAP(reg_val, MAX_LINE);
+	int ret;
+
+	mutex_lock(&chip->i2c_lock);
+	ret = pca953x_read_regs(chip, chip->regs->input, reg_val);
+	mutex_unlock(&chip->i2c_lock);
+	if (ret)
+		return ret;
+
+	bitmap_replace(bits, bits, reg_val, mask, gc->ngpio);
+	return 0;
+}
+
 static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
 				      unsigned long *mask, unsigned long *bits)
 {
@@ -489,10 +502,8 @@ static int pca953x_gpio_set_pull_up_down(struct pca953x_chip *chip,
 					 unsigned int offset,
 					 unsigned long config)
 {
-	u8 pull_en_reg = pca953x_recalc_addr(chip, PCAL953X_PULL_EN, offset,
-					     true, false);
-	u8 pull_sel_reg = pca953x_recalc_addr(chip, PCAL953X_PULL_SEL, offset,
-					      true, false);
+	u8 pull_en_reg = pca953x_recalc_addr(chip, PCAL953X_PULL_EN, offset);
+	u8 pull_sel_reg = pca953x_recalc_addr(chip, PCAL953X_PULL_SEL, offset);
 	u8 bit = BIT(offset % BANK_SZ);
 	int ret;
 
@@ -551,6 +562,7 @@ static void pca953x_setup_gpio(struct pca953x_chip *chip, int gpios)
 	gc->get = pca953x_gpio_get_value;
 	gc->set = pca953x_gpio_set_value;
 	gc->get_direction = pca953x_gpio_get_direction;
+	gc->get_multiple = pca953x_gpio_get_multiple;
 	gc->set_multiple = pca953x_gpio_set_multiple;
 	gc->set_config = pca953x_gpio_set_config;
 	gc->can_sleep = true;
@@ -863,6 +875,7 @@ static int pca953x_probe(struct i2c_client *client,
 	int ret;
 	u32 invert = 0;
 	struct regulator *reg;
+	const struct regmap_config *regmap_config;
 
 	chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
 	if (chip == NULL)
@@ -925,7 +938,17 @@ static int pca953x_probe(struct i2c_client *client,
 
 	i2c_set_clientdata(client, chip);
 
-	chip->regmap = devm_regmap_init_i2c(client, &pca953x_i2c_regmap);
+	pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK);
+
+	if (NBANK(chip) > 2 || PCA_CHIP_TYPE(chip->driver_data) == PCA957X_TYPE) {
+		dev_info(&client->dev, "using AI\n");
+		regmap_config = &pca953x_ai_i2c_regmap;
+	} else {
+		dev_info(&client->dev, "using no AI\n");
+		regmap_config = &pca953x_i2c_regmap;
+	}
+
+	chip->regmap = devm_regmap_init_i2c(client, regmap_config);
 	if (IS_ERR(chip->regmap)) {
 		ret = PTR_ERR(chip->regmap);
 		goto err_exit;
@@ -956,7 +979,6 @@ static int pca953x_probe(struct i2c_client *client,
 	/* initialize cached registers from their original values.
 	 * we can't share this chip with another i2c master.
 	 */
-	pca953x_setup_gpio(chip, chip->driver_data & PCA_GPIO_MASK);
 
 	if (PCA_CHIP_TYPE(chip->driver_data) == PCA953X_TYPE) {
 		chip->regs = &pca953x_regs;
@@ -1154,7 +1176,7 @@ static struct i2c_driver pca953x_driver = {
 		.name	= "pca953x",
 		.pm	= &pca953x_pm_ops,
 		.of_match_table = pca953x_dt_ids,
-		.acpi_match_table = ACPI_PTR(pca953x_acpi_ids),
+		.acpi_match_table = pca953x_acpi_ids,
 	},
 	.probe		= pca953x_probe,
 	.remove		= pca953x_remove,
diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c
index 3f3d9a94b709..e96d28bf43b4 100644
--- a/drivers/gpio/gpio-pch.c
+++ b/drivers/gpio/gpio-pch.c
@@ -2,6 +2,7 @@
 /*
  * Copyright (C) 2011 LAPIS Semiconductor Co., Ltd.
  */
+#include <linux/bits.h>
 #include <linux/gpio/driver.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
@@ -11,11 +12,11 @@
 #include <linux/slab.h>
 
 #define PCH_EDGE_FALLING	0
-#define PCH_EDGE_RISING		BIT(0)
-#define PCH_LEVEL_L		BIT(1)
-#define PCH_LEVEL_H		(BIT(0) | BIT(1))
-#define PCH_EDGE_BOTH		BIT(2)
-#define PCH_IM_MASK		(BIT(0) | BIT(1) | BIT(2))
+#define PCH_EDGE_RISING		1
+#define PCH_LEVEL_L		2
+#define PCH_LEVEL_H		3
+#define PCH_EDGE_BOTH		4
+#define PCH_IM_MASK		GENMASK(2, 0)
 
 #define PCH_IRQ_BASE		24
 
@@ -103,9 +104,9 @@ static void pch_gpio_set(struct gpio_chip *gpio, unsigned nr, int val)
 	spin_lock_irqsave(&chip->spinlock, flags);
 	reg_val = ioread32(&chip->reg->po);
 	if (val)
-		reg_val |= (1 << nr);
+		reg_val |= BIT(nr);
 	else
-		reg_val &= ~(1 << nr);
+		reg_val &= ~BIT(nr);
 
 	iowrite32(reg_val, &chip->reg->po);
 	spin_unlock_irqrestore(&chip->spinlock, flags);
@@ -115,7 +116,7 @@ static int pch_gpio_get(struct gpio_chip *gpio, unsigned nr)
 {
 	struct pch_gpio *chip =	gpiochip_get_data(gpio);
 
-	return (ioread32(&chip->reg->pi) >> nr) & 1;
+	return !!(ioread32(&chip->reg->pi) & BIT(nr));
 }
 
 static int pch_gpio_direction_output(struct gpio_chip *gpio, unsigned nr,
@@ -130,13 +131,14 @@ static int pch_gpio_direction_output(struct gpio_chip *gpio, unsigned nr,
 
 	reg_val = ioread32(&chip->reg->po);
 	if (val)
-		reg_val |= (1 << nr);
+		reg_val |= BIT(nr);
 	else
-		reg_val &= ~(1 << nr);
+		reg_val &= ~BIT(nr);
 	iowrite32(reg_val, &chip->reg->po);
 
-	pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1);
-	pm |= (1 << nr);
+	pm = ioread32(&chip->reg->pm);
+	pm &= BIT(gpio_pins[chip->ioh]) - 1;
+	pm |= BIT(nr);
 	iowrite32(pm, &chip->reg->pm);
 
 	spin_unlock_irqrestore(&chip->spinlock, flags);
@@ -151,8 +153,9 @@ static int pch_gpio_direction_input(struct gpio_chip *gpio, unsigned nr)
 	unsigned long flags;
 
 	spin_lock_irqsave(&chip->spinlock, flags);
-	pm = ioread32(&chip->reg->pm) & ((1 << gpio_pins[chip->ioh]) - 1);
-	pm &= ~(1 << nr);
+	pm = ioread32(&chip->reg->pm);
+	pm &= BIT(gpio_pins[chip->ioh]) - 1;
+	pm &= ~BIT(nr);
 	iowrite32(pm, &chip->reg->pm);
 	spin_unlock_irqrestore(&chip->spinlock, flags);
 
@@ -226,17 +229,15 @@ static int pch_irq_type(struct irq_data *d, unsigned int type)
 	int ch, irq = d->irq;
 
 	ch = irq - chip->irq_base;
-	if (irq <= chip->irq_base + 7) {
+	if (irq < chip->irq_base + 8) {
 		im_reg = &chip->reg->im0;
-		im_pos = ch;
+		im_pos = ch - 0;
 	} else {
 		im_reg = &chip->reg->im1;
 		im_pos = ch - 8;
 	}
 	dev_dbg(chip->dev, "irq=%d type=%d ch=%d pos=%d\n", irq, type, ch, im_pos);
 
-	spin_lock_irqsave(&chip->spinlock, flags);
-
 	switch (type) {
 	case IRQ_TYPE_EDGE_RISING:
 		val = PCH_EDGE_RISING;
@@ -254,20 +255,21 @@ static int pch_irq_type(struct irq_data *d, unsigned int type)
 		val = PCH_LEVEL_L;
 		break;
 	default:
-		goto unlock;
+		return 0;
 	}
 
+	spin_lock_irqsave(&chip->spinlock, flags);
+
 	/* Set interrupt mode */
 	im = ioread32(im_reg) & ~(PCH_IM_MASK << (im_pos * 4));
 	iowrite32(im | (val << (im_pos * 4)), im_reg);
 
 	/* And the handler */
-	if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH))
+	if (type & IRQ_TYPE_LEVEL_MASK)
 		irq_set_handler_locked(d, handle_level_irq);
-	else if (type & (IRQ_TYPE_EDGE_FALLING | IRQ_TYPE_EDGE_RISING))
+	else if (type & IRQ_TYPE_EDGE_BOTH)
 		irq_set_handler_locked(d, handle_edge_irq);
 
-unlock:
 	spin_unlock_irqrestore(&chip->spinlock, flags);
 	return 0;
 }
@@ -277,7 +279,7 @@ static void pch_irq_unmask(struct irq_data *d)
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
 	struct pch_gpio *chip = gc->private;
 
-	iowrite32(1 << (d->irq - chip->irq_base), &chip->reg->imaskclr);
+	iowrite32(BIT(d->irq - chip->irq_base), &chip->reg->imaskclr);
 }
 
 static void pch_irq_mask(struct irq_data *d)
@@ -285,7 +287,7 @@ static void pch_irq_mask(struct irq_data *d)
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
 	struct pch_gpio *chip = gc->private;
 
-	iowrite32(1 << (d->irq - chip->irq_base), &chip->reg->imask);
+	iowrite32(BIT(d->irq - chip->irq_base), &chip->reg->imask);
 }
 
 static void pch_irq_ack(struct irq_data *d)
@@ -293,21 +295,22 @@ static void pch_irq_ack(struct irq_data *d)
 	struct irq_chip_generic *gc = irq_data_get_irq_chip_data(d);
 	struct pch_gpio *chip = gc->private;
 
-	iowrite32(1 << (d->irq - chip->irq_base), &chip->reg->iclr);
+	iowrite32(BIT(d->irq - chip->irq_base), &chip->reg->iclr);
 }
 
 static irqreturn_t pch_gpio_handler(int irq, void *dev_id)
 {
 	struct pch_gpio *chip = dev_id;
 	unsigned long reg_val = ioread32(&chip->reg->istatus);
-	int i, ret = IRQ_NONE;
+	int i;
+
+	dev_dbg(chip->dev, "irq=%d  status=0x%lx\n", irq, reg_val);
 
-	for_each_set_bit(i, &reg_val, gpio_pins[chip->ioh]) {
-		dev_dbg(chip->dev, "[%d]:irq=%d  status=0x%lx\n", i, irq, reg_val);
+	reg_val &= BIT(gpio_pins[chip->ioh]) - 1;
+	for_each_set_bit(i, &reg_val, gpio_pins[chip->ioh])
 		generic_handle_irq(chip->irq_base + i);
-		ret = IRQ_HANDLED;
-	}
-	return ret;
+
+	return IRQ_RETVAL(reg_val);
 }
 
 static int pch_gpio_alloc_generic_chip(struct pch_gpio *chip,
@@ -344,7 +347,6 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 	s32 ret;
 	struct pch_gpio *chip;
 	int irq_base;
-	u32 msk;
 
 	chip = devm_kzalloc(&pdev->dev, sizeof(*chip), GFP_KERNEL);
 	if (chip == NULL)
@@ -357,7 +359,7 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 		return ret;
 	}
 
-	ret = pcim_iomap_regions(pdev, 1 << 1, KBUILD_MODNAME);
+	ret = pcim_iomap_regions(pdev, BIT(1), KBUILD_MODNAME);
 	if (ret) {
 		dev_err(&pdev->dev, "pci_request_regions FAILED-%d", ret);
 		return ret;
@@ -393,9 +395,8 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 	chip->irq_base = irq_base;
 
 	/* Mask all interrupts, but enable them */
-	msk = (1 << gpio_pins[chip->ioh]) - 1;
-	iowrite32(msk, &chip->reg->imask);
-	iowrite32(msk, &chip->reg->ien);
+	iowrite32(BIT(gpio_pins[chip->ioh]) - 1, &chip->reg->imask);
+	iowrite32(BIT(gpio_pins[chip->ioh]) - 1, &chip->reg->ien);
 
 	ret = devm_request_irq(&pdev->dev, pdev->irq, pch_gpio_handler,
 			       IRQF_SHARED, KBUILD_MODNAME, chip);
diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c
index e241fb884c12..f1b53dd1df1a 100644
--- a/drivers/gpio/gpio-pl061.c
+++ b/drivers/gpio/gpio-pl061.c
@@ -16,6 +16,7 @@
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/irqchip/chained_irq.h>
+#include <linux/module.h>
 #include <linux/bitops.h>
 #include <linux/gpio/driver.h>
 #include <linux/device.h>
@@ -408,6 +409,7 @@ static const struct amba_id pl061_ids[] = {
 	},
 	{ 0, 0 },
 };
+MODULE_DEVICE_TABLE(amba, pl061_ids);
 
 static struct amba_driver pl061_gpio_driver = {
 	.drv = {
@@ -419,9 +421,6 @@ static struct amba_driver pl061_gpio_driver = {
 	.id_table	= pl061_ids,
 	.probe		= pl061_probe,
 };
+module_amba_driver(pl061_gpio_driver);
 
-static int __init pl061_gpio_init(void)
-{
-	return amba_driver_register(&pl061_gpio_driver);
-}
-device_initcall(pl061_gpio_init);
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index 7284473c9fe3..eac1582c70da 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -250,8 +250,10 @@ static int gpio_rcar_request(struct gpio_chip *chip, unsigned offset)
 	int error;
 
 	error = pm_runtime_get_sync(p->dev);
-	if (error < 0)
+	if (error < 0) {
+		pm_runtime_put(p->dev);
 		return error;
+	}
 
 	error = pinctrl_gpio_request(chip->base + offset);
 	if (error)
diff --git a/drivers/gpio/gpio-regmap.c b/drivers/gpio/gpio-regmap.c
new file mode 100644
index 000000000000..5412cb3b0b2a
--- /dev/null
+++ b/drivers/gpio/gpio-regmap.c
@@ -0,0 +1,349 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * regmap based generic GPIO driver
+ *
+ * Copyright 2020 Michael Walle <michael@walle.cc>
+ */
+
+#include <linux/gpio/driver.h>
+#include <linux/gpio/regmap.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+struct gpio_regmap {
+	struct device *parent;
+	struct regmap *regmap;
+	struct gpio_chip gpio_chip;
+
+	int reg_stride;
+	int ngpio_per_reg;
+	unsigned int reg_dat_base;
+	unsigned int reg_set_base;
+	unsigned int reg_clr_base;
+	unsigned int reg_dir_in_base;
+	unsigned int reg_dir_out_base;
+
+	int (*reg_mask_xlate)(struct gpio_regmap *gpio, unsigned int base,
+			      unsigned int offset, unsigned int *reg,
+			      unsigned int *mask);
+
+	void *driver_data;
+};
+
+static unsigned int gpio_regmap_addr(unsigned int addr)
+{
+	if (addr == GPIO_REGMAP_ADDR_ZERO)
+		return 0;
+
+	return addr;
+}
+
+static int gpio_regmap_simple_xlate(struct gpio_regmap *gpio,
+				    unsigned int base, unsigned int offset,
+				    unsigned int *reg, unsigned int *mask)
+{
+	unsigned int line = offset % gpio->ngpio_per_reg;
+	unsigned int stride = offset / gpio->ngpio_per_reg;
+
+	*reg = base + stride * gpio->reg_stride;
+	*mask = BIT(line);
+
+	return 0;
+}
+
+static int gpio_regmap_get(struct gpio_chip *chip, unsigned int offset)
+{
+	struct gpio_regmap *gpio = gpiochip_get_data(chip);
+	unsigned int base, val, reg, mask;
+	int ret;
+
+	/* we might not have an output register if we are input only */
+	if (gpio->reg_dat_base)
+		base = gpio_regmap_addr(gpio->reg_dat_base);
+	else
+		base = gpio_regmap_addr(gpio->reg_set_base);
+
+	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(gpio->regmap, reg, &val);
+	if (ret)
+		return ret;
+
+	return !!(val & mask);
+}
+
+static void gpio_regmap_set(struct gpio_chip *chip, unsigned int offset,
+			    int val)
+{
+	struct gpio_regmap *gpio = gpiochip_get_data(chip);
+	unsigned int base = gpio_regmap_addr(gpio->reg_set_base);
+	unsigned int reg, mask;
+
+	gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);
+	if (val)
+		regmap_update_bits(gpio->regmap, reg, mask, mask);
+	else
+		regmap_update_bits(gpio->regmap, reg, mask, 0);
+}
+
+static void gpio_regmap_set_with_clear(struct gpio_chip *chip,
+				       unsigned int offset, int val)
+{
+	struct gpio_regmap *gpio = gpiochip_get_data(chip);
+	unsigned int base, reg, mask;
+
+	if (val)
+		base = gpio_regmap_addr(gpio->reg_set_base);
+	else
+		base = gpio_regmap_addr(gpio->reg_clr_base);
+
+	gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);
+	regmap_write(gpio->regmap, reg, mask);
+}
+
+static int gpio_regmap_get_direction(struct gpio_chip *chip,
+				     unsigned int offset)
+{
+	struct gpio_regmap *gpio = gpiochip_get_data(chip);
+	unsigned int base, val, reg, mask;
+	int invert, ret;
+
+	if (gpio->reg_dir_out_base) {
+		base = gpio_regmap_addr(gpio->reg_dir_out_base);
+		invert = 0;
+	} else if (gpio->reg_dir_in_base) {
+		base = gpio_regmap_addr(gpio->reg_dir_in_base);
+		invert = 1;
+	} else {
+		return -EOPNOTSUPP;
+	}
+
+	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(gpio->regmap, reg, &val);
+	if (ret)
+		return ret;
+
+	if (!!(val & mask) ^ invert)
+		return GPIO_LINE_DIRECTION_OUT;
+	else
+		return GPIO_LINE_DIRECTION_IN;
+}
+
+static int gpio_regmap_set_direction(struct gpio_chip *chip,
+				     unsigned int offset, bool output)
+{
+	struct gpio_regmap *gpio = gpiochip_get_data(chip);
+	unsigned int base, val, reg, mask;
+	int invert, ret;
+
+	if (gpio->reg_dir_out_base) {
+		base = gpio_regmap_addr(gpio->reg_dir_out_base);
+		invert = 0;
+	} else if (gpio->reg_dir_in_base) {
+		base = gpio_regmap_addr(gpio->reg_dir_in_base);
+		invert = 1;
+	} else {
+		return -EOPNOTSUPP;
+	}
+
+	ret = gpio->reg_mask_xlate(gpio, base, offset, &reg, &mask);
+	if (ret)
+		return ret;
+
+	if (invert)
+		val = output ? 0 : mask;
+	else
+		val = output ? mask : 0;
+
+	return regmap_update_bits(gpio->regmap, reg, mask, val);
+}
+
+static int gpio_regmap_direction_input(struct gpio_chip *chip,
+				       unsigned int offset)
+{
+	return gpio_regmap_set_direction(chip, offset, false);
+}
+
+static int gpio_regmap_direction_output(struct gpio_chip *chip,
+					unsigned int offset, int value)
+{
+	gpio_regmap_set(chip, offset, value);
+
+	return gpio_regmap_set_direction(chip, offset, true);
+}
+
+void gpio_regmap_set_drvdata(struct gpio_regmap *gpio, void *data)
+{
+	gpio->driver_data = data;
+}
+EXPORT_SYMBOL_GPL(gpio_regmap_set_drvdata);
+
+void *gpio_regmap_get_drvdata(struct gpio_regmap *gpio)
+{
+	return gpio->driver_data;
+}
+EXPORT_SYMBOL_GPL(gpio_regmap_get_drvdata);
+
+/**
+ * gpio_regmap_register() - Register a generic regmap GPIO controller
+ * @config: configuration for gpio_regmap
+ *
+ * Return: A pointer to the registered gpio_regmap or ERR_PTR error value.
+ */
+struct gpio_regmap *gpio_regmap_register(const struct gpio_regmap_config *config)
+{
+	struct gpio_regmap *gpio;
+	struct gpio_chip *chip;
+	int ret;
+
+	if (!config->parent)
+		return ERR_PTR(-EINVAL);
+
+	if (!config->ngpio)
+		return ERR_PTR(-EINVAL);
+
+	/* we need at least one */
+	if (!config->reg_dat_base && !config->reg_set_base)
+		return ERR_PTR(-EINVAL);
+
+	/* if we have a direction register we need both input and output */
+	if ((config->reg_dir_out_base || config->reg_dir_in_base) &&
+	    (!config->reg_dat_base || !config->reg_set_base))
+		return ERR_PTR(-EINVAL);
+
+	/* we don't support having both registers simultaneously for now */
+	if (config->reg_dir_out_base && config->reg_dir_in_base)
+		return ERR_PTR(-EINVAL);
+
+	gpio = kzalloc(sizeof(*gpio), GFP_KERNEL);
+	if (!gpio)
+		return ERR_PTR(-ENOMEM);
+
+	gpio->parent = config->parent;
+	gpio->regmap = config->regmap;
+	gpio->ngpio_per_reg = config->ngpio_per_reg;
+	gpio->reg_stride = config->reg_stride;
+	gpio->reg_mask_xlate = config->reg_mask_xlate;
+	gpio->reg_dat_base = config->reg_dat_base;
+	gpio->reg_set_base = config->reg_set_base;
+	gpio->reg_clr_base = config->reg_clr_base;
+	gpio->reg_dir_in_base = config->reg_dir_in_base;
+	gpio->reg_dir_out_base = config->reg_dir_out_base;
+
+	/* if not set, assume there is only one register */
+	if (!gpio->ngpio_per_reg)
+		gpio->ngpio_per_reg = config->ngpio;
+
+	/* if not set, assume they are consecutive */
+	if (!gpio->reg_stride)
+		gpio->reg_stride = 1;
+
+	if (!gpio->reg_mask_xlate)
+		gpio->reg_mask_xlate = gpio_regmap_simple_xlate;
+
+	chip = &gpio->gpio_chip;
+	chip->parent = config->parent;
+	chip->base = -1;
+	chip->ngpio = config->ngpio;
+	chip->names = config->names;
+	chip->label = config->label ?: dev_name(config->parent);
+
+	/*
+	 * If our regmap is fast_io we should probably set can_sleep to false.
+	 * Right now, the regmap doesn't save this property, nor is there any
+	 * access function for it.
+	 * The only regmap type which uses fast_io is regmap-mmio. For now,
+	 * assume a safe default of true here.
+	 */
+	chip->can_sleep = true;
+
+	chip->get = gpio_regmap_get;
+	if (gpio->reg_set_base && gpio->reg_clr_base)
+		chip->set = gpio_regmap_set_with_clear;
+	else if (gpio->reg_set_base)
+		chip->set = gpio_regmap_set;
+
+	if (gpio->reg_dir_in_base || gpio->reg_dir_out_base) {
+		chip->get_direction = gpio_regmap_get_direction;
+		chip->direction_input = gpio_regmap_direction_input;
+		chip->direction_output = gpio_regmap_direction_output;
+	}
+
+	ret = gpiochip_add_data(chip, gpio);
+	if (ret < 0)
+		goto err_free_gpio;
+
+	if (config->irq_domain) {
+		ret = gpiochip_irqchip_add_domain(chip, config->irq_domain);
+		if (ret)
+			goto err_remove_gpiochip;
+	}
+
+	return gpio;
+
+err_remove_gpiochip:
+	gpiochip_remove(chip);
+err_free_gpio:
+	kfree(gpio);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL_GPL(gpio_regmap_register);
+
+/**
+ * gpio_regmap_unregister() - Unregister a generic regmap GPIO controller
+ * @gpio: gpio_regmap device to unregister
+ */
+void gpio_regmap_unregister(struct gpio_regmap *gpio)
+{
+	gpiochip_remove(&gpio->gpio_chip);
+	kfree(gpio);
+}
+EXPORT_SYMBOL_GPL(gpio_regmap_unregister);
+
+static void devm_gpio_regmap_unregister(struct device *dev, void *res)
+{
+	gpio_regmap_unregister(*(struct gpio_regmap **)res);
+}
+
+/**
+ * devm_gpio_regmap_register() - resource managed gpio_regmap_register()
+ * @dev: device that is registering this GPIO device
+ * @config: configuration for gpio_regmap
+ *
+ * Managed gpio_regmap_register(). For generic regmap GPIO device registered by
+ * this function, gpio_regmap_unregister() is automatically called on driver
+ * detach. See gpio_regmap_register() for more information.
+ *
+ * Return: A pointer to the registered gpio_regmap or ERR_PTR error value.
+ */
+struct gpio_regmap *devm_gpio_regmap_register(struct device *dev,
+					      const struct gpio_regmap_config *config)
+{
+	struct gpio_regmap **ptr, *gpio;
+
+	ptr = devres_alloc(devm_gpio_regmap_unregister, sizeof(*ptr),
+			   GFP_KERNEL);
+	if (!ptr)
+		return ERR_PTR(-ENOMEM);
+
+	gpio = gpio_regmap_register(config);
+	if (!IS_ERR(gpio)) {
+		*ptr = gpio;
+		devres_add(dev, ptr);
+	} else {
+		devres_free(ptr);
+	}
+
+	return gpio;
+}
+EXPORT_SYMBOL_GPL(devm_gpio_regmap_register);
+
+MODULE_AUTHOR("Michael Walle <michael@walle.cc>");
+MODULE_DESCRIPTION("GPIO generic regmap driver core");
+MODULE_LICENSE("GPL");
diff --git a/drivers/gpio/gpio-tegra186.c b/drivers/gpio/gpio-tegra186.c
index 79b553dc39a3..178e9128ded0 100644
--- a/drivers/gpio/gpio-tegra186.c
+++ b/drivers/gpio/gpio-tegra186.c
@@ -894,6 +894,7 @@ static const struct of_device_id tegra186_gpio_of_match[] = {
 		/* sentinel */
 	}
 };
+MODULE_DEVICE_TABLE(of, tegra186_gpio_of_match);
 
 static struct platform_driver tegra186_gpio_driver = {
 	.driver = {
diff --git a/drivers/gpio/gpio-xgene-sb.c b/drivers/gpio/gpio-xgene-sb.c
index 25d86441666e..a809609ee957 100644
--- a/drivers/gpio/gpio-xgene-sb.c
+++ b/drivers/gpio/gpio-xgene-sb.c
@@ -10,8 +10,8 @@
 
 #include <linux/module.h>
 #include <linux/io.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
-#include <linux/of_gpio.h>
 #include <linux/gpio/driver.h>
 #include <linux/acpi.h>
 
@@ -122,7 +122,7 @@ static int xgene_gpio_sb_to_irq(struct gpio_chip *gc, u32 gpio)
 	fwspec.fwnode = gc->parent->fwnode;
 	fwspec.param_count = 2;
 	fwspec.param[0] = GPIO_TO_HWIRQ(priv, gpio);
-	fwspec.param[1] = IRQ_TYPE_NONE;
+	fwspec.param[1] = IRQ_TYPE_EDGE_RISING;
 	return irq_create_fwspec_mapping(&fwspec);
 }
 
@@ -290,10 +290,8 @@ static int xgene_gpio_sb_probe(struct platform_device *pdev)
 
 	dev_info(&pdev->dev, "X-Gene GPIO Standby driver registered\n");
 
-	if (priv->nirq > 0) {
-		/* Register interrupt handlers for gpio signaled acpi events */
-		acpi_gpiochip_request_interrupts(&priv->gc);
-	}
+	/* Register interrupt handlers for GPIO signaled ACPI Events */
+	acpi_gpiochip_request_interrupts(&priv->gc);
 
 	return ret;
 }
@@ -302,9 +300,7 @@ static int xgene_gpio_sb_remove(struct platform_device *pdev)
 {
 	struct xgene_gpio_sb *priv = platform_get_drvdata(pdev);
 
-	if (priv->nirq > 0) {
-		acpi_gpiochip_free_interrupts(&priv->gc);
-	}
+	acpi_gpiochip_free_interrupts(&priv->gc);
 
 	irq_domain_remove(priv->irq_domain);
 
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 0017367e94ee..9276051663da 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -1353,7 +1353,7 @@ int acpi_gpio_count(struct device *dev, const char *con_id)
 }
 
 /* Run deferred acpi_gpiochip_request_irqs() */
-static int acpi_gpio_handle_deferred_request_irqs(void)
+static int __init acpi_gpio_handle_deferred_request_irqs(void)
 {
 	struct acpi_gpio_chip *acpi_gpio, *tmp;
 
@@ -1371,7 +1371,7 @@ static int acpi_gpio_handle_deferred_request_irqs(void)
 /* We must use _sync so that this runs after the first deferred_probe run */
 late_initcall_sync(acpi_gpio_handle_deferred_request_irqs);
 
-static const struct dmi_system_id gpiolib_acpi_quirks[] = {
+static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = {
 	{
 		/*
 		 * The Minix Neo Z83-4 has a micro-USB-B id-pin handler for
@@ -1455,7 +1455,7 @@ static const struct dmi_system_id gpiolib_acpi_quirks[] = {
 	{} /* Terminating entry */
 };
 
-static int acpi_gpio_setup_params(void)
+static int __init acpi_gpio_setup_params(void)
 {
 	const struct acpi_gpiolib_dmi_quirk *quirk = NULL;
 	const struct dmi_system_id *id;
diff --git a/drivers/gpio/gpiolib-devprop.c b/drivers/gpio/gpiolib-devprop.c
index 53781b253986..26741032fa9e 100644
--- a/drivers/gpio/gpiolib-devprop.c
+++ b/drivers/gpio/gpiolib-devprop.c
@@ -37,8 +37,11 @@ void devprop_gpiochip_set_names(struct gpio_chip *chip,
 	if (count < 0)
 		return;
 
-	if (count > gdev->ngpio)
+	if (count > gdev->ngpio) {
+		dev_warn(&gdev->dev, "gpio-line-names is length %d but should be at most length %d",
+			 count, gdev->ngpio);
 		count = gdev->ngpio;
+	}
 
 	names = kcalloc(count, sizeof(*names), GFP_KERNEL);
 	if (!names)
diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c
index ccc449df3792..2c5dd1349f16 100644
--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -344,6 +344,12 @@ struct gpio_desc *gpiod_get_from_of_node(struct device_node *node,
 	if (transitory)
 		lflags |= GPIO_TRANSITORY;
 
+	if (flags & OF_GPIO_PULL_UP)
+		lflags |= GPIO_PULL_UP;
+
+	if (flags & OF_GPIO_PULL_DOWN)
+		lflags |= GPIO_PULL_DOWN;
+
 	ret = gpiod_configure_flags(desc, propname, lflags, dflags);
 	if (ret < 0) {
 		gpiod_put(desc);
@@ -585,6 +591,10 @@ static struct gpio_desc *of_parse_own_gpio(struct device_node *np,
 		*lflags |= GPIO_ACTIVE_LOW;
 	if (xlate_flags & OF_GPIO_TRANSITORY)
 		*lflags |= GPIO_TRANSITORY;
+	if (xlate_flags & OF_GPIO_PULL_UP)
+		*lflags |= GPIO_PULL_UP;
+	if (xlate_flags & OF_GPIO_PULL_DOWN)
+		*lflags |= GPIO_PULL_DOWN;
 
 	if (of_property_read_bool(np, "input"))
 		*dflags |= GPIOD_IN;
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index c14f0784274a..4fa075d49fbc 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -296,6 +296,9 @@ static int gpiodev_add_to_list(struct gpio_device *gdev)
 
 /*
  * Convert a GPIO name to its descriptor
+ * Note that there is no guarantee that GPIO names are globally unique!
+ * Hence this function will return, if it exists, a reference to the first GPIO
+ * line found that matches the given name.
  */
 static struct gpio_desc *gpio_name_to_desc(const char * const name)
 {
@@ -329,10 +332,12 @@ static struct gpio_desc *gpio_name_to_desc(const char * const name)
 }
 
 /*
- * Takes the names from gc->names and checks if they are all unique. If they
- * are, they are assigned to their gpio descriptors.
+ * Take the names from gc->names and assign them to their GPIO descriptors.
+ * Warn if a name is already used for a GPIO line on a different GPIO chip.
  *
- * Warning if one of the names is already used for a different GPIO.
+ * Note that:
+ *   1. Non-unique names are still accepted,
+ *   2. Name collisions within the same GPIO chip are not reported.
  */
 static int gpiochip_set_desc_names(struct gpio_chip *gc)
 {
@@ -1267,8 +1272,7 @@ static long gpio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		if (copy_to_user(ip, &chipinfo, sizeof(chipinfo)))
 			return -EFAULT;
 		return 0;
-	} else if (cmd == GPIO_GET_LINEINFO_IOCTL ||
-		   cmd == GPIO_GET_LINEINFO_WATCH_IOCTL) {
+	} else if (cmd == GPIO_GET_LINEINFO_IOCTL) {
 		struct gpioline_info lineinfo;
 
 		if (copy_from_user(&lineinfo, ip, sizeof(lineinfo)))
@@ -1280,23 +1284,37 @@ static long gpio_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 
 		hwgpio = gpio_chip_hwgpio(desc);
 
-		if (cmd == GPIO_GET_LINEINFO_WATCH_IOCTL &&
-		    test_bit(hwgpio, priv->watched_lines))
-			return -EBUSY;
-
 		gpio_desc_to_lineinfo(desc, &lineinfo);
 
 		if (copy_to_user(ip, &lineinfo, sizeof(lineinfo)))
 			return -EFAULT;
-
-		if (cmd == GPIO_GET_LINEINFO_WATCH_IOCTL)
-			set_bit(hwgpio, priv->watched_lines);
-
 		return 0;
 	} else if (cmd == GPIO_GET_LINEHANDLE_IOCTL) {
 		return linehandle_create(gdev, ip);
 	} else if (cmd == GPIO_GET_LINEEVENT_IOCTL) {
 		return lineevent_create(gdev, ip);
+	} else if (cmd == GPIO_GET_LINEINFO_WATCH_IOCTL) {
+		struct gpioline_info lineinfo;
+
+		if (copy_from_user(&lineinfo, ip, sizeof(lineinfo)))
+			return -EFAULT;
+
+		desc = gpiochip_get_desc(gc, lineinfo.line_offset);
+		if (IS_ERR(desc))
+			return PTR_ERR(desc);
+
+		hwgpio = gpio_chip_hwgpio(desc);
+
+		if (test_bit(hwgpio, priv->watched_lines))
+			return -EBUSY;
+
+		gpio_desc_to_lineinfo(desc, &lineinfo);
+
+		if (copy_to_user(ip, &lineinfo, sizeof(lineinfo)))
+			return -EFAULT;
+
+		set_bit(hwgpio, priv->watched_lines);
+		return 0;
 	} else if (cmd == GPIO_GET_LINEINFO_UNWATCH_IOCTL) {
 		if (copy_from_user(&offset, ip, sizeof(offset)))
 			return -EFAULT;
@@ -1538,9 +1556,8 @@ static int gpiochip_setup_dev(struct gpio_device *gdev)
 
 	/* From this point, the .release() function cleans up gpio_device */
 	gdev->dev.release = gpiodevice_release;
-	pr_debug("%s: registered GPIOs %d to %d on device: %s (%s)\n",
-		 __func__, gdev->base, gdev->base + gdev->ngpio - 1,
-		 dev_name(&gdev->dev), gdev->chip->label ? : "generic");
+	dev_dbg(&gdev->dev, "registered GPIOs %d to %d on %s\n", gdev->base,
+		gdev->base + gdev->ngpio - 1, gdev->chip->label ? : "generic");
 
 	return 0;
 
@@ -1556,8 +1573,8 @@ static void gpiochip_machine_hog(struct gpio_chip *gc, struct gpiod_hog *hog)
 
 	desc = gpiochip_get_desc(gc, hog->chip_hwnum);
 	if (IS_ERR(desc)) {
-		pr_err("%s: unable to get GPIO desc: %ld\n",
-		       __func__, PTR_ERR(desc));
+		chip_err(gc, "%s: unable to get GPIO desc: %ld\n", __func__,
+			 PTR_ERR(desc));
 		return;
 	}
 
@@ -1566,8 +1583,8 @@ static void gpiochip_machine_hog(struct gpio_chip *gc, struct gpiod_hog *hog)
 
 	rv = gpiod_hog(desc, hog->line_name, hog->lflags, hog->dflags);
 	if (rv)
-		pr_err("%s: unable to hog GPIO line (%s:%u): %d\n",
-		       __func__, gc->label, hog->chip_hwnum, rv);
+		gpiod_err(desc, "%s: unable to hog GPIO line (%s:%u): %d\n",
+			  __func__, gc->label, hog->chip_hwnum, rv);
 }
 
 static void machine_gpiochip_add(struct gpio_chip *gc)
@@ -1592,8 +1609,8 @@ static void gpiochip_setup_devs(void)
 	list_for_each_entry(gdev, &gpio_devices, list) {
 		ret = gpiochip_setup_dev(gdev);
 		if (ret)
-			pr_err("%s: Failed to initialize gpio device (%d)\n",
-			       dev_name(&gdev->dev), ret);
+			dev_err(&gdev->dev,
+				"Failed to initialize gpio device (%d)\n", ret);
 	}
 }
 
@@ -2461,32 +2478,37 @@ static void gpiochip_irq_relres(struct irq_data *d)
 	gpiochip_relres_irq(gc, d->hwirq);
 }
 
+static void gpiochip_irq_mask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+	if (gc->irq.irq_mask)
+		gc->irq.irq_mask(d);
+	gpiochip_disable_irq(gc, d->hwirq);
+}
+
+static void gpiochip_irq_unmask(struct irq_data *d)
+{
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+
+	gpiochip_enable_irq(gc, d->hwirq);
+	if (gc->irq.irq_unmask)
+		gc->irq.irq_unmask(d);
+}
+
 static void gpiochip_irq_enable(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
 
 	gpiochip_enable_irq(gc, d->hwirq);
-	if (gc->irq.irq_enable)
-		gc->irq.irq_enable(d);
-	else
-		gc->irq.chip->irq_unmask(d);
+	gc->irq.irq_enable(d);
 }
 
 static void gpiochip_irq_disable(struct irq_data *d)
 {
 	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
 
-	/*
-	 * Since we override .irq_disable() we need to mimic the
-	 * behaviour of __irq_disable() in irq/chip.c.
-	 * First call .irq_disable() if it exists, else mimic the
-	 * behaviour of mask_irq() which calls .irq_mask() if
-	 * it exists.
-	 */
-	if (gc->irq.irq_disable)
-		gc->irq.irq_disable(d);
-	else if (gc->irq.chip->irq_mask)
-		gc->irq.chip->irq_mask(d);
+	gc->irq.irq_disable(d);
 	gpiochip_disable_irq(gc, d->hwirq);
 }
 
@@ -2511,10 +2533,22 @@ static void gpiochip_set_irq_hooks(struct gpio_chip *gc)
 			  "detected irqchip that is shared with multiple gpiochips: please fix the driver.\n");
 		return;
 	}
-	gc->irq.irq_enable = irqchip->irq_enable;
-	gc->irq.irq_disable = irqchip->irq_disable;
-	irqchip->irq_enable = gpiochip_irq_enable;
-	irqchip->irq_disable = gpiochip_irq_disable;
+
+	if (irqchip->irq_disable) {
+		gc->irq.irq_disable = irqchip->irq_disable;
+		irqchip->irq_disable = gpiochip_irq_disable;
+	} else {
+		gc->irq.irq_mask = irqchip->irq_mask;
+		irqchip->irq_mask = gpiochip_irq_mask;
+	}
+
+	if (irqchip->irq_enable) {
+		gc->irq.irq_enable = irqchip->irq_enable;
+		irqchip->irq_enable = gpiochip_irq_enable;
+	} else {
+		gc->irq.irq_unmask = irqchip->irq_unmask;
+		irqchip->irq_unmask = gpiochip_irq_unmask;
+	}
 }
 
 /**
@@ -2702,7 +2736,7 @@ int gpiochip_irqchip_add_key(struct gpio_chip *gc,
 		return -EINVAL;
 
 	if (!gc->parent) {
-		pr_err("missing gpiochip .dev parent pointer\n");
+		chip_err(gc, "missing gpiochip .dev parent pointer\n");
 		return -EINVAL;
 	}
 	gc->irq.threaded = threaded;
@@ -2752,6 +2786,26 @@ int gpiochip_irqchip_add_key(struct gpio_chip *gc,
 }
 EXPORT_SYMBOL_GPL(gpiochip_irqchip_add_key);
 
+/**
+ * gpiochip_irqchip_add_domain() - adds an irqdomain to a gpiochip
+ * @gc: the gpiochip to add the irqchip to
+ * @domain: the irqdomain to add to the gpiochip
+ *
+ * This function adds an IRQ domain to the gpiochip.
+ */
+int gpiochip_irqchip_add_domain(struct gpio_chip *gc,
+				struct irq_domain *domain)
+{
+	if (!domain)
+		return -EINVAL;
+
+	gc->to_irq = gpiochip_to_irq;
+	gc->irq.domain = domain;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(gpiochip_irqchip_add_domain);
+
 #else /* CONFIG_GPIOLIB_IRQCHIP */
 
 static inline int gpiochip_add_irqchip(struct gpio_chip *gc,
@@ -4653,7 +4707,7 @@ static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id,
 	if (!table)
 		return desc;
 
-	for (p = &table->table[0]; p->chip_label; p++) {
+	for (p = &table->table[0]; p->key; p++) {
 		struct gpio_chip *gc;
 
 		/* idx must always match exactly */
@@ -4664,18 +4718,30 @@ static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id,
 		if (p->con_id && (!con_id || strcmp(p->con_id, con_id)))
 			continue;
 
-		gc = find_chip_by_name(p->chip_label);
+		if (p->chip_hwnum == U16_MAX) {
+			desc = gpio_name_to_desc(p->key);
+			if (desc) {
+				*flags = p->flags;
+				return desc;
+			}
+
+			dev_warn(dev, "cannot find GPIO line %s, deferring\n",
+				 p->key);
+			return ERR_PTR(-EPROBE_DEFER);
+		}
+
+		gc = find_chip_by_name(p->key);
 
 		if (!gc) {
 			/*
 			 * As the lookup table indicates a chip with
-			 * p->chip_label should exist, assume it may
+			 * p->key should exist, assume it may
 			 * still appear later and let the interested
 			 * consumer be probed again or let the Deferred
 			 * Probe infrastructure handle the error.
 			 */
 			dev_warn(dev, "cannot find GPIO chip %s, deferring\n",
-				 p->chip_label);
+				 p->key);
 			return ERR_PTR(-EPROBE_DEFER);
 		}
 
@@ -4706,7 +4772,7 @@ static int platform_gpio_count(struct device *dev, const char *con_id)
 	if (!table)
 		return -ENOENT;
 
-	for (p = &table->table[0]; p->chip_label; p++) {
+	for (p = &table->table[0]; p->key; p++) {
 		if ((con_id && p->con_id && !strcmp(con_id, p->con_id)) ||
 		    (!con_id && !p->con_id))
 			count++;
@@ -4877,7 +4943,7 @@ int gpiod_configure_flags(struct gpio_desc *desc, const char *con_id,
 
 	/* No particular flag request, return here... */
 	if (!(dflags & GPIOD_FLAGS_BIT_DIR_SET)) {
-		pr_debug("no flags found for %s\n", con_id);
+		gpiod_dbg(desc, "no flags found for %s\n", con_id);
 		return 0;
 	}
 
@@ -5108,8 +5174,7 @@ int gpiod_hog(struct gpio_desc *desc, const char *name,
 	/* Mark GPIO as hogged so it can be identified and removed later */
 	set_bit(FLAG_IS_HOGGED, &desc->flags);
 
-	pr_info("GPIO line %d (%s) hogged as %s%s\n",
-		desc_to_gpio(desc), name,
+	gpiod_info(desc, "hogged as %s%s\n",
 		(dflags & GPIOD_FLAGS_BIT_DIR_OUT) ? "output" : "input",
 		(dflags & GPIOD_FLAGS_BIT_DIR_OUT) ?
 		  (dflags & GPIOD_FLAGS_BIT_DIR_VAL) ? "/high" : "/low" : "");
diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h
index 853ce681b4a4..9ed242316414 100644
--- a/drivers/gpio/gpiolib.h
+++ b/drivers/gpio/gpiolib.h
@@ -81,8 +81,7 @@ struct gpio_array {
 	unsigned long		invert_mask[];
 };
 
-struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip,
-				    unsigned int hwnum);
+struct gpio_desc *gpiochip_get_desc(struct gpio_chip *gc, unsigned int hwnum);
 int gpiod_get_array_value_complex(bool raw, bool can_sleep,
 				  unsigned int array_size,
 				  struct gpio_desc **desc_array,
@@ -163,18 +162,18 @@ static inline int gpio_chip_hwgpio(const struct gpio_desc *desc)
 
 /* With chip prefix */
 
-#define chip_emerg(chip, fmt, ...)					\
-	dev_emerg(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
-#define chip_crit(chip, fmt, ...)					\
-	dev_crit(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
-#define chip_err(chip, fmt, ...)					\
-	dev_err(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
-#define chip_warn(chip, fmt, ...)					\
-	dev_warn(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
-#define chip_info(chip, fmt, ...)					\
-	dev_info(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
-#define chip_dbg(chip, fmt, ...)					\
-	dev_dbg(&chip->gpiodev->dev, "(%s): " fmt, chip->label, ##__VA_ARGS__)
+#define chip_emerg(gc, fmt, ...)					\
+	dev_emerg(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
+#define chip_crit(gc, fmt, ...)					\
+	dev_crit(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
+#define chip_err(gc, fmt, ...)					\
+	dev_err(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
+#define chip_warn(gc, fmt, ...)					\
+	dev_warn(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
+#define chip_info(gc, fmt, ...)					\
+	dev_info(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
+#define chip_dbg(gc, fmt, ...)					\
+	dev_dbg(&gc->gpiodev->dev, "(%s): " fmt, gc->label, ##__VA_ARGS__)
 
 #ifdef CONFIG_GPIO_SYSFS