Merge tag 'gpio-v3.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

Pull GPIO update from Linus Walleij:
 "This is the bulk of GPIO changes for the v3.17 development cycle, and
  this time we got a lot of action going on and it will continue:

   - The core GPIO library implementation has been split up in three
     different files:
     - gpiolib.c for the latest and greatest and shiny GPIO library code
       using GPIO descriptors only
     - gpiolib-legacy.c for the old integer number space API that we are
       phasing out gradually
     - gpiolib-sysfs.c for the sysfs interface that we are not entirely
       happy with, but has to live on for ABI compatibility

   - Add a flags argument to *gpiod_get* functions, with some
     backward-compatibility macros to ease transitions.  We should have
     had the flags there from the beginning it seems, now we need to
     clean up the mess.  There is a plan on how to move forward here
     devised by Alexandre Courbot and Mark Brown

   - Split off a special <linux/gpio/machine.h> header for the board
     gpio table registration, as per example from the regulator
     subsystem

   - Start to kill off the return value from gpiochip_remove() by
     removing the __must_check attribute and removing all checks inside
     the drivers/gpio directory.  The rationale is: well what were we
     supposed to do if there is an error code? Not much: print an error
     message.  And gpiolib already does that.  So make this function
     return void eventually

   - Some cleanups of hairy gpiolib code, make some functions not to be
     used outside the library private and make sure they are not
     exported, remove gpiod_lock/unlock_as_irq() as the existing
     function is for driver-internal use and fine as it is, delete
     gpio_ensure_requested() as it is not meaningful anymore

   - Support the GPIOF_ACTIVE_LOW flag from gpio_request_one() function
     calls, which is logical since this is already supported when
     referencing GPIOs from e.g. device trees

   - Switch STMPE, intel-mid, lynxpoint and ACPI (!) to use the gpiolib
     irqchip helpers cutting down on GPIO irqchip boilerplate a bit more

   - New driver for the Zynq GPIO block

   - The usual incremental improvements around a bunch of drivers

   - Janitorial syntactic and semantic cleanups by Jingoo Han, and
     Rickard Strandqvist especially"

* tag 'gpio-v3.17-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (37 commits)
  MAINTAINERS: update GPIO include files
  gpio: add missing includes in machine.h
  gpio: add flags argument to gpiod_get*() functions
  MAINTAINERS: Update Samsung pin control entry
  gpio / ACPI: Move event handling registration to gpiolib irqchip helpers
  gpio: lynxpoint: Convert to use gpiolib irqchip
  gpio: split gpiod board registration into machine header
  gpio: remove gpio_ensure_requested()
  gpio: remove useless check in gpiolib_sysfs_init()
  gpiolib: Export gpiochip_request_own_desc and gpiochip_free_own_desc
  gpio: move gpio_ensure_requested() into legacy C file
  gpio: remove gpiod_lock/unlock_as_irq()
  gpio: make gpiochip_get_desc() gpiolib-private
  gpio: simplify gpiochip_export()
  gpio: remove export of private of_get_named_gpio_flags()
  gpio: Add support for GPIOF_ACTIVE_LOW to gpio_request_one functions
  gpio: zynq: Clear pending interrupt when enabling a IRQ
  gpio: drop retval check enforcing from gpiochip_remove()
  gpio: remove all usage of gpio_remove retval in driver/gpio
  devicetree: Add Zynq GPIO devicetree bindings documentation
  ...

Documentation/devicetree/bindings/gpio/gpio-zynq.txt

+Xilinx Zynq GPIO controller Device Tree Bindings
+-------------------------------------------
+
+Required properties:
+- #gpio-cells 		: Should be two
+			  - First cell is the GPIO line number
+			  - Second cell is used to specify optional
+			    parameters (unused)
+- compatible		: Should be "xlnx,zynq-gpio-1.0"
+- clocks		: Clock specifier (see clock bindings for details)
+- gpio-controller	: Marks the device node as a GPIO controller.
+- interrupts		: Interrupt specifier (see interrupt bindings for
+			  details)
+- interrupt-parent	: Must be core interrupt controller
+- reg			: Address and length of the register set for the device
+
+Example:
+	gpio@e000a000 {
+		#gpio-cells = <2>;
+		compatible = "xlnx,zynq-gpio-1.0";
+		clocks = <&clkc 42>;
+		gpio-controller;
+		interrupt-parent = <&intc>;
+		interrupts = <0 20 4>;
+		reg = <0xe000a000 0x1000>;
+	};

Documentation/gpio/board.txt

@@ -60,7 +60,7 @@ Platform Data
 Finally, GPIOs can be bound to devices and functions using platform data. Board
 files that desire to do so need to include the following header:
 
-	#include <linux/gpio/driver.h>
+	#include <linux/gpio/machine.h>
 
 GPIOs are mapped by the means of tables of lookups, containing instances of the
 gpiod_lookup structure. Two macros are defined to help declaring such mappings:

Documentation/gpio/consumer.txt

@@ -29,13 +29,24 @@ gpiod_get() functions. Like many other kernel subsystems, gpiod_get() takes the
 device that will use the GPIO and the function the requested GPIO is supposed to
 fulfill:
 
-	struct gpio_desc *gpiod_get(struct device *dev, const char *con_id)
+	struct gpio_desc *gpiod_get(struct device *dev, const char *con_id,
+				    enum gpiod_flags flags)
 
 If a function is implemented by using several GPIOs together (e.g. a simple LED
 device that displays digits), an additional index argument can be specified:
 
 	struct gpio_desc *gpiod_get_index(struct device *dev,
-					  const char *con_id, unsigned int idx)
+					  const char *con_id, unsigned int idx,
+					  enum gpiod_flags flags)
+
+The flags parameter is used to optionally specify a direction and initial value
+for the GPIO. Values can be:
+
+* GPIOD_ASIS or 0 to not initialize the GPIO at all. The direction must be set
+  later with one of the dedicated functions.
+* GPIOD_IN to initialize the GPIO as input.
+* GPIOD_OUT_LOW to initialize the GPIO as output with a value of 0.
+* GPIOD_OUT_HIGH to initialize the GPIO as output with a value of 1.
 
 Both functions return either a valid GPIO descriptor, or an error code checkable
 with IS_ERR() (they will never return a NULL pointer). -ENOENT will be returned
@@ -46,11 +57,13 @@ errors and an absence of GPIO for optional GPIO parameters.
 
 Device-managed variants of these functions are also defined:
 
-	struct gpio_desc *devm_gpiod_get(struct device *dev, const char *con_id)
+	struct gpio_desc *devm_gpiod_get(struct device *dev, const char *con_id,
+					 enum gpiod_flags flags)
 
 	struct gpio_desc *devm_gpiod_get_index(struct device *dev,
 					       const char *con_id,
-					       unsigned int idx)
+					       unsigned int idx,
+					       enum gpiod_flags flags)
 
 A GPIO descriptor can be disposed of using the gpiod_put() function:
 
@@ -67,8 +80,9 @@ Using GPIOs
 
 Setting Direction
 -----------------
-The first thing a driver must do with a GPIO is setting its direction. This is
-done by invoking one of the gpiod_direction_*() functions:
+The first thing a driver must do with a GPIO is setting its direction. If no
+direction-setting flags have been given to gpiod_get*(), this is done by
+invoking one of the gpiod_direction_*() functions:
 
 	int gpiod_direction_input(struct gpio_desc *desc)
 	int gpiod_direction_output(struct gpio_desc *desc, int value)

Documentation/gpio/driver.txt

@@ -157,13 +157,34 @@ Locking IRQ usage
 Input GPIOs can be used as IRQ signals. When this happens, a driver is requested
 to mark the GPIO as being used as an IRQ:
 
-	int gpiod_lock_as_irq(struct gpio_desc *desc)
+	int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset)
 
 This will prevent the use of non-irq related GPIO APIs until the GPIO IRQ lock
 is released:
 
-	void gpiod_unlock_as_irq(struct gpio_desc *desc)
+	void gpio_unlock_as_irq(struct gpio_chip *chip, unsigned int offset)
 
 When implementing an irqchip inside a GPIO driver, these two functions should
 typically be called in the .startup() and .shutdown() callbacks from the
 irqchip.
+
+
+Requesting self-owned GPIO pins
+-------------------------------
+
+Sometimes it is useful to allow a GPIO chip driver to request its own GPIO
+descriptors through the gpiolib API. Using gpio_request() for this purpose
+does not help since it pins the module to the kernel forever (it calls
+try_module_get()). A GPIO driver can use the following functions instead
+to request and free descriptors without being pinned to the kernel forever.
+
+	int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label)
+
+	void gpiochip_free_own_desc(struct gpio_desc *desc)
+
+Descriptors requested with gpiochip_request_own_desc() must be released with
+gpiochip_free_own_desc().
+
+These functions must be used with care since they do not affect module use
+count. Do not use the functions to request gpio descriptors not owned by the
+calling driver.

MAINTAINERS

@@ -4031,7 +4031,8 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio.git
 S:	Maintained
 F:	Documentation/gpio/
 F:	drivers/gpio/
-F:	include/linux/gpio*
+F:	include/linux/gpio/
+F:	include/linux/gpio.h
 F:	include/asm-generic/gpio.h
 
 GRE DEMULTIPLEXER DRIVER
@@ -7002,9 +7003,7 @@ M:	Thomas Abraham <thomas.abraham@linaro.org>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 L:	linux-samsung-soc@vger.kernel.org (moderated for non-subscribers)
 S:	Maintained
-F:	drivers/pinctrl/pinctrl-exynos.*
-F:	drivers/pinctrl/pinctrl-s3c*
-F:	drivers/pinctrl/pinctrl-samsung.*
+F:	drivers/pinctrl/samsung/
 
 PIN CONTROLLER - ST SPEAR
 M:	Viresh Kumar <viresh.linux@gmail.com>

arch/arm/mach-at91/at91rm9200_devices.c

@@ -15,7 +15,7 @@
 
 #include <linux/dma-mapping.h>
 #include <linux/gpio.h>
-#include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
 #include <linux/platform_device.h>
 #include <linux/i2c-gpio.h>
 

arch/arm/mach-tegra/board-paz00.c

@@ -17,7 +17,7 @@
  *
  */
 
-#include <linux/gpio/driver.h>
+#include <linux/gpio/machine.h>
 #include <linux/platform_device.h>
 #include <linux/rfkill-gpio.h>
 

arch/mips/jz4740/board-qi_lb60.c

@@ -15,6 +15,7 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/gpio.h>
+#include <linux/gpio/machine.h>
 
 #include <linux/input.h>
 #include <linux/gpio_keys.h>

drivers/gpio/Kconfig

@@ -340,6 +340,13 @@ config GPIO_XILINX
 	help
 	  Say yes here to support the Xilinx FPGA GPIO device
 
+config GPIO_ZYNQ
+	tristate "Xilinx Zynq GPIO support"
+	depends on ARCH_ZYNQ
+	select GPIOLIB_IRQCHIP
+	help
+	  Say yes here to support Xilinx Zynq GPIO controller.
+
 config GPIO_XTENSA
 	bool "Xtensa GPIO32 support"
 	depends on XTENSA
@@ -423,7 +430,7 @@ config GPIO_GE_FPGA
 config GPIO_LYNXPOINT
 	tristate "Intel Lynxpoint GPIO support"
 	depends on ACPI && X86
-	select IRQ_DOMAIN
+	select GPIOLIB_IRQCHIP
 	help
 	  driver for GPIO functionality on Intel Lynxpoint PCH chipset
 	  Requires ACPI device enumeration code to set up a platform device.
@@ -586,6 +593,7 @@ config GPIO_SX150X
 config GPIO_STMPE
 	bool "STMPE GPIOs"
 	depends on MFD_STMPE
+	select GPIOLIB_IRQCHIP
 	help
 	  This enables support for the GPIOs found on the STMPE I/O
 	  Expanders.

drivers/gpio/Makefile

@@ -4,7 +4,9 @@ ccflags-$(CONFIG_DEBUG_GPIO)	+= -DDEBUG
 
 obj-$(CONFIG_GPIO_DEVRES)	+= devres.o
 obj-$(CONFIG_GPIOLIB)		+= gpiolib.o
+obj-$(CONFIG_GPIOLIB)		+= gpiolib-legacy.o
 obj-$(CONFIG_OF_GPIO)		+= gpiolib-of.o
+obj-$(CONFIG_GPIO_SYSFS)	+= gpiolib-sysfs.o
 obj-$(CONFIG_GPIO_ACPI)		+= gpiolib-acpi.o
 
 # Device drivers. Generally keep list sorted alphabetically
@@ -102,3 +104,4 @@ obj-$(CONFIG_GPIO_WM8994)	+= gpio-wm8994.o
 obj-$(CONFIG_GPIO_XILINX)	+= gpio-xilinx.o
 obj-$(CONFIG_GPIO_XTENSA)	+= gpio-xtensa.o
 obj-$(CONFIG_GPIO_ZEVIO)	+= gpio-zevio.o
+obj-$(CONFIG_GPIO_ZYNQ)		+= gpio-zynq.o

drivers/gpio/devres.c

@@ -39,47 +39,53 @@ static int devm_gpiod_match(struct device *dev, void *res, void *data)
  * devm_gpiod_get - Resource-managed gpiod_get()
  * @dev:	GPIO consumer
  * @con_id:	function within the GPIO consumer
+ * @flags:	optional GPIO initialization flags
  *
  * Managed gpiod_get(). GPIO descriptors returned from this function are
  * automatically disposed on driver detach. See gpiod_get() for detailed
  * information about behavior and return values.
  */
-struct gpio_desc *__must_check devm_gpiod_get(struct device *dev,
-					      const char *con_id)
+struct gpio_desc *__must_check __devm_gpiod_get(struct device *dev,
+					      const char *con_id,
+					      enum gpiod_flags flags)
 {
-	return devm_gpiod_get_index(dev, con_id, 0);
+	return devm_gpiod_get_index(dev, con_id, 0, flags);
 }
-EXPORT_SYMBOL(devm_gpiod_get);
+EXPORT_SYMBOL(__devm_gpiod_get);
 
 /**
  * devm_gpiod_get_optional - Resource-managed gpiod_get_optional()
  * @dev: GPIO consumer
  * @con_id: function within the GPIO consumer
+ * @flags: optional GPIO initialization flags
  *
  * Managed gpiod_get_optional(). GPIO descriptors returned from this function
  * are automatically disposed on driver detach. See gpiod_get_optional() for
  * detailed information about behavior and return values.
  */
-struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev,
-						       const char *con_id)
+struct gpio_desc *__must_check __devm_gpiod_get_optional(struct device *dev,
+						       const char *con_id,
+						       enum gpiod_flags flags)
 {
-	return devm_gpiod_get_index_optional(dev, con_id, 0);
+	return devm_gpiod_get_index_optional(dev, con_id, 0, flags);
 }
-EXPORT_SYMBOL(devm_gpiod_get_optional);
+EXPORT_SYMBOL(__devm_gpiod_get_optional);
 
 /**
  * devm_gpiod_get_index - Resource-managed gpiod_get_index()
  * @dev:	GPIO consumer
  * @con_id:	function within the GPIO consumer
  * @idx:	index of the GPIO to obtain in the consumer
+ * @flags:	optional GPIO initialization flags
  *
  * Managed gpiod_get_index(). GPIO descriptors returned from this function are
  * automatically disposed on driver detach. See gpiod_get_index() for detailed
  * information about behavior and return values.
  */
-struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
+struct gpio_desc *__must_check __devm_gpiod_get_index(struct device *dev,
 						    const char *con_id,
-						    unsigned int idx)
+						    unsigned int idx,
+						    enum gpiod_flags flags)
 {
 	struct gpio_desc **dr;
 	struct gpio_desc *desc;
@@ -89,7 +95,7 @@ struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
 	if (!dr)
 		return ERR_PTR(-ENOMEM);
 
-	desc = gpiod_get_index(dev, con_id, idx);
+	desc = gpiod_get_index(dev, con_id, idx, flags);
 	if (IS_ERR(desc)) {
 		devres_free(dr);
 		return desc;
@@ -100,26 +106,28 @@ struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
 
 	return desc;
 }
-EXPORT_SYMBOL(devm_gpiod_get_index);
+EXPORT_SYMBOL(__devm_gpiod_get_index);
 
 /**
  * devm_gpiod_get_index_optional - Resource-managed gpiod_get_index_optional()
  * @dev: GPIO consumer
  * @con_id: function within the GPIO consumer
  * @index: index of the GPIO to obtain in the consumer
+ * @flags: optional GPIO initialization flags
  *
  * Managed gpiod_get_index_optional(). GPIO descriptors returned from this
  * function are automatically disposed on driver detach. See
  * gpiod_get_index_optional() for detailed information about behavior and
  * return values.
  */
-struct gpio_desc *__must_check devm_gpiod_get_index_optional(struct device *dev,
+struct gpio_desc *__must_check __devm_gpiod_get_index_optional(struct device *dev,
 							     const char *con_id,
-							     unsigned int index)
+							     unsigned int index,
+							 enum gpiod_flags flags)
 {
 	struct gpio_desc *desc;
 
-	desc = devm_gpiod_get_index(dev, con_id, index);
+	desc = devm_gpiod_get_index(dev, con_id, index, flags);
 	if (IS_ERR(desc)) {
 		if (PTR_ERR(desc) == -ENOENT)
 			return NULL;
@@ -127,7 +135,7 @@ struct gpio_desc *__must_check devm_gpiod_get_index_optional(struct device *dev,
 
 	return desc;
 }
-EXPORT_SYMBOL(devm_gpiod_get_index_optional);
+EXPORT_SYMBOL(__devm_gpiod_get_index_optional);
 
 /**
  * devm_gpiod_put - Resource-managed gpiod_put()

drivers/gpio/gpio-74x164.c

@@ -167,13 +167,11 @@ static int gen_74x164_probe(struct spi_device *spi)
 static int gen_74x164_remove(struct spi_device *spi)
 {
 	struct gen_74x164_chip *chip = spi_get_drvdata(spi);
-	int ret;
 
-	ret = gpiochip_remove(&chip->gpio_chip);
-	if (!ret)
+	gpiochip_remove(&chip->gpio_chip);
 	mutex_destroy(&chip->lock);
 
-	return ret;
+	return 0;
 }
 
 static const struct of_device_id gen_74x164_dt_ids[] = {

drivers/gpio/gpio-adnp.c

@@ -585,15 +585,8 @@ static int adnp_i2c_remove(struct i2c_client *client)
 {
 	struct adnp *adnp = i2c_get_clientdata(client);
 	struct device_node *np = client->dev.of_node;
-	int err;
-
-	err = gpiochip_remove(&adnp->gpio);
-	if (err < 0) {
-		dev_err(&client->dev, "%s failed: %d\n", "gpiochip_remove()",
-			err);
-		return err;
-	}
 
+	gpiochip_remove(&adnp->gpio);
 	if (of_find_property(np, "interrupt-controller", NULL))
 		adnp_irq_teardown(adnp);
 

drivers/gpio/gpio-adp5520.c

@@ -167,15 +167,9 @@ static int adp5520_gpio_probe(struct platform_device *pdev)
 static int adp5520_gpio_remove(struct platform_device *pdev)
 {
 	struct adp5520_gpio *dev;
-	int ret;
 
 	dev = platform_get_drvdata(pdev);
-	ret = gpiochip_remove(&dev->gpio_chip);
-	if (ret) {
-		dev_err(&pdev->dev, "%s failed, %d\n",
-				"gpiochip_remove()", ret);
-		return ret;
-	}
+	gpiochip_remove(&dev->gpio_chip);
 
 	return 0;
 }

drivers/gpio/gpio-adp5588.c

@@ -470,11 +470,7 @@ static int adp5588_gpio_remove(struct i2c_client *client)
 	if (dev->irq_base)
 		free_irq(dev->client->irq, dev);
 
-	ret = gpiochip_remove(&dev->gpio_chip);
-	if (ret) {
-		dev_err(&client->dev, "gpiochip_remove failed %d\n", ret);
-		return ret;
-	}
+	gpiochip_remove(&dev->gpio_chip);
 
 	kfree(dev);
 	return 0;

drivers/gpio/gpio-amd8111.c

@@ -232,8 +232,7 @@ static int __init amd_gpio_init(void)
 
 static void __exit amd_gpio_exit(void)
 {
-	int err = gpiochip_remove(&gp.chip);
-	WARN_ON(err);
+	gpiochip_remove(&gp.chip);
 	ioport_unmap(gp.pm);
 	release_region(gp.pmbase + PMBASE_OFFSET, PMBASE_SIZE);
 }

drivers/gpio/gpio-arizona.c

@@ -149,7 +149,8 @@ static int arizona_gpio_remove(struct platform_device *pdev)
 {
 	struct arizona_gpio *arizona_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&arizona_gpio->gpio_chip);
+	gpiochip_remove(&arizona_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver arizona_gpio_driver = {

drivers/gpio/gpio-cs5535.c

@@ -358,14 +358,8 @@ static int cs5535_gpio_probe(struct platform_device *pdev)
 static int cs5535_gpio_remove(struct platform_device *pdev)
 {
 	struct resource *r;
-	int err;
 
-	err = gpiochip_remove(&cs5535_gpio_chip.chip);
-	if (err) {
-		/* uhh? */
-		dev_err(&pdev->dev, "unable to remove gpio_chip?\n");
-		return err;
-	}
+	gpiochip_remove(&cs5535_gpio_chip.chip);
 
 	r = platform_get_resource(pdev, IORESOURCE_IO, 0);
 	release_region(r->start, resource_size(r));

drivers/gpio/gpio-da9052.c

@@ -237,7 +237,8 @@ static int da9052_gpio_remove(struct platform_device *pdev)
 {
 	struct da9052_gpio *gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&gpio->gp);
+	gpiochip_remove(&gpio->gp);
+	return 0;
 }
 
 static struct platform_driver da9052_gpio_driver = {

drivers/gpio/gpio-da9055.c

@@ -174,7 +174,8 @@ static int da9055_gpio_remove(struct platform_device *pdev)
 {
 	struct da9055_gpio *gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&gpio->gp);
+	gpiochip_remove(&gpio->gp);
+	return 0;
 }
 
 static struct platform_driver da9055_gpio_driver = {

drivers/gpio/gpio-dwapb.c

@@ -359,7 +359,7 @@ static void dwapb_gpio_unregister(struct dwapb_gpio *gpio)
 
 	for (m = 0; m < gpio->nr_ports; ++m)
 		if (gpio->ports[m].is_registered)
-			WARN_ON(gpiochip_remove(&gpio->ports[m].bgc.gc));
+			gpiochip_remove(&gpio->ports[m].bgc.gc);
 }
 
 static int dwapb_gpio_probe(struct platform_device *pdev)

drivers/gpio/gpio-em.c

@@ -409,11 +409,8 @@ static int em_gio_probe(struct platform_device *pdev)
 static int em_gio_remove(struct platform_device *pdev)
 {
 	struct em_gio_priv *p = platform_get_drvdata(pdev);
-	int ret;
 
-	ret = gpiochip_remove(&p->gpio_chip);
-	if (ret)
-		return ret;
+	gpiochip_remove(&p->gpio_chip);
 
 	irq_domain_remove(p->irq_domain);
 	return 0;

drivers/gpio/gpio-f7188x.c

@@ -317,13 +317,7 @@ static int f7188x_gpio_probe(struct platform_device *pdev)
 err_gpiochip:
 	for (i = i - 1; i >= 0; i--) {
 		struct f7188x_gpio_bank *bank = &data->bank[i];
-		int tmp;
-
-		tmp = gpiochip_remove(&bank->chip);
-		if (tmp < 0)
-			dev_err(&pdev->dev,
-				"Failed to remove gpiochip %d: %d\n",
-				i, tmp);
+		gpiochip_remove(&bank->chip);
 	}
 
 	return err;
@@ -331,20 +325,12 @@ static int f7188x_gpio_probe(struct platform_device *pdev)
 
 static int f7188x_gpio_remove(struct platform_device *pdev)
 {
-	int err;
 	int i;
 	struct f7188x_gpio_data *data = platform_get_drvdata(pdev);
 
 	for (i = 0; i < data->nr_bank; i++) {
 		struct f7188x_gpio_bank *bank = &data->bank[i];
-
-		err = gpiochip_remove(&bank->chip);
-		if (err) {
-			dev_err(&pdev->dev,
-				"Failed to remove GPIO gpiochip %d: %d\n",
-				i, err);
-			return err;
-		}
+		gpiochip_remove(&bank->chip);
 	}
 
 	return 0;

drivers/gpio/gpio-generic.c

@@ -398,7 +398,8 @@ static int bgpio_request(struct gpio_chip *chip, unsigned gpio_pin)
 
 int bgpio_remove(struct bgpio_chip *bgc)
 {
-	return gpiochip_remove(&bgc->gc);
+	gpiochip_remove(&bgc->gc);
+	return 0;
 }
 EXPORT_SYMBOL_GPL(bgpio_remove);
 

drivers/gpio/gpio-grgpio.c

@@ -468,9 +468,7 @@ static int grgpio_remove(struct platform_device *ofdev)
 		}
 	}
 
-	ret = gpiochip_remove(&priv->bgc.gc);
-	if (ret)
-		goto out;
+	gpiochip_remove(&priv->bgc.gc);
 
 	if (priv->domain)
 		irq_domain_remove(priv->domain);

drivers/gpio/gpio-ich.c

@@ -514,14 +514,7 @@ static int ichx_gpio_probe(struct platform_device *pdev)
 
 static int ichx_gpio_remove(struct platform_device *pdev)
 {
-	int err;
-
-	err = gpiochip_remove(&ichx_priv.chip);
-	if (err) {
-		dev_err(&pdev->dev, "%s failed, %d\n",
-				"gpiochip_remove()", err);
-		return err;
-	}
+	gpiochip_remove(&ichx_priv.chip);
 
 	ichx_gpio_release_regions(ichx_priv.gpio_base, ichx_priv.use_gpio);
 	if (ichx_priv.pm_base)

drivers/gpio/gpio-intel-mid.c

@@ -28,12 +28,10 @@
 #include <linux/stddef.h>
 #include <linux/interrupt.h>
 #include <linux/init.h>
-#include <linux/irq.h>
 #include <linux/io.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
 #include <linux/slab.h>
 #include <linux/pm_runtime.h>
-#include <linux/irqdomain.h>
 
 #define INTEL_MID_IRQ_TYPE_EDGE		(1 << 0)
 #define INTEL_MID_IRQ_TYPE_LEVEL	(1 << 1)
@@ -78,10 +76,12 @@ struct intel_mid_gpio {
 	void __iomem			*reg_base;
 	spinlock_t			lock;
 	struct pci_dev			*pdev;
-	struct irq_domain		*domain;
 };
 
-#define to_intel_gpio_priv(chip) container_of(chip, struct intel_mid_gpio, chip)
+static inline struct intel_mid_gpio *to_intel_gpio_priv(struct gpio_chip *gc)
+{
+	return container_of(gc, struct intel_mid_gpio, chip);
+}
 
 static void __iomem *gpio_reg(struct gpio_chip *chip, unsigned offset,
 			      enum GPIO_REG reg_type)
@@ -182,15 +182,10 @@ static int intel_gpio_direction_output(struct gpio_chip *chip,
 	return 0;
 }
 
-static int intel_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
-	struct intel_mid_gpio *priv = to_intel_gpio_priv(chip);
-	return irq_create_mapping(priv->domain, offset);
-}
-
 static int intel_mid_irq_type(struct irq_data *d, unsigned type)
 {
-	struct intel_mid_gpio *priv = irq_data_get_irq_chip_data(d);
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct intel_mid_gpio *priv = to_intel_gpio_priv(gc);
 	u32 gpio = irqd_to_hwirq(d);
 	unsigned long flags;
 	u32 value;
@@ -231,33 +226,11 @@ static void intel_mid_irq_mask(struct irq_data *d)
 {
 }
 
-static int intel_mid_irq_reqres(struct irq_data *d)
-{
-	struct intel_mid_gpio *priv = irq_data_get_irq_chip_data(d);
-
-	if (gpio_lock_as_irq(&priv->chip, irqd_to_hwirq(d))) {
-		dev_err(priv->chip.dev,
-			"unable to lock HW IRQ %lu for IRQ\n",
-			irqd_to_hwirq(d));
-		return -EINVAL;
-	}
-	return 0;
-}
-
-static void intel_mid_irq_relres(struct irq_data *d)
-{
-	struct intel_mid_gpio *priv = irq_data_get_irq_chip_data(d);
-
-	gpio_unlock_as_irq(&priv->chip, irqd_to_hwirq(d));
-}
-
 static struct irq_chip intel_mid_irqchip = {
 	.name		= "INTEL_MID-GPIO",
 	.irq_mask	= intel_mid_irq_mask,
 	.irq_unmask	= intel_mid_irq_unmask,
 	.irq_set_type	= intel_mid_irq_type,
-	.irq_request_resources = intel_mid_irq_reqres,
-	.irq_release_resources = intel_mid_irq_relres,
 };
 
 static const struct intel_mid_gpio_ddata gpio_lincroft = {
@@ -330,8 +303,9 @@ MODULE_DEVICE_TABLE(pci, intel_gpio_ids);
 
 static void intel_mid_irq_handler(unsigned irq, struct irq_desc *desc)
 {
+	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+	struct intel_mid_gpio *priv = to_intel_gpio_priv(gc);
 	struct irq_data *data = irq_desc_get_irq_data(desc);
-	struct intel_mid_gpio *priv = irq_data_get_irq_handler_data(data);
 	struct irq_chip *chip = irq_data_get_irq_chip(data);
 	u32 base, gpio, mask;
 	unsigned long pending;
@@ -345,7 +319,7 @@ static void intel_mid_irq_handler(unsigned irq, struct irq_desc *desc)
 			mask = BIT(gpio);
 			/* Clear before handling so we can't lose an edge */
 			writel(mask, gedr);
-			generic_handle_irq(irq_find_mapping(priv->domain,
+			generic_handle_irq(irq_find_mapping(gc->irqdomain,
 							    base + gpio));
 		}
 	}
@@ -371,23 +345,6 @@ static void intel_mid_irq_init_hw(struct intel_mid_gpio *priv)
 	}
 }
 
-static int intel_gpio_irq_map(struct irq_domain *d, unsigned int irq,
-			    irq_hw_number_t hwirq)
-{
-	struct intel_mid_gpio *priv = d->host_data;
-
-	irq_set_chip_and_handler(irq, &intel_mid_irqchip, handle_simple_irq);
-	irq_set_chip_data(irq, priv);
-	irq_set_irq_type(irq, IRQ_TYPE_NONE);
-
-	return 0;
-}
-
-static const struct irq_domain_ops intel_gpio_irq_ops = {
-	.map = intel_gpio_irq_map,
-	.xlate = irq_domain_xlate_twocell,
-};
-
 static int intel_gpio_runtime_idle(struct device *dev)
 {
 	int err = pm_schedule_suspend(dev, 500);
@@ -441,7 +398,6 @@ static int intel_gpio_probe(struct pci_dev *pdev,
 	priv->chip.direction_output = intel_gpio_direction_output;
 	priv->chip.get = intel_gpio_get;
 	priv->chip.set = intel_gpio_set;
-	priv->chip.to_irq = intel_gpio_to_irq;
 	priv->chip.base = gpio_base;
 	priv->chip.ngpio = ddata->ngpio;
 	priv->chip.can_sleep = false;
@@ -449,11 +405,6 @@ static int intel_gpio_probe(struct pci_dev *pdev,
 
 	spin_lock_init(&priv->lock);
 
-	priv->domain = irq_domain_add_simple(pdev->dev.of_node, ddata->ngpio,
-					irq_base, &intel_gpio_irq_ops, priv);
-	if (!priv->domain)
-		return -ENOMEM;
-
 	pci_set_drvdata(pdev, priv);
 	retval = gpiochip_add(&priv->chip);
 	if (retval) {
@@ -461,10 +412,23 @@ static int intel_gpio_probe(struct pci_dev *pdev,
 		return retval;
 	}
 
+	retval = gpiochip_irqchip_add(&priv->chip,
+				      &intel_mid_irqchip,
+				      irq_base,
+				      handle_simple_irq,
+				      IRQ_TYPE_NONE);
+	if (retval) {
+		dev_err(&pdev->dev,
+			"could not connect irqchip to gpiochip\n");
+		return retval;
+	}
+
 	intel_mid_irq_init_hw(priv);
 
-	irq_set_handler_data(pdev->irq, priv);
-	irq_set_chained_handler(pdev->irq, intel_mid_irq_handler);
+	gpiochip_set_chained_irqchip(&priv->chip,
+				     &intel_mid_irqchip,
+				     pdev->irq,
+				     intel_mid_irq_handler);
 
 	pm_runtime_put_noidle(&pdev->dev);
 	pm_runtime_allow(&pdev->dev);

drivers/gpio/gpio-it8761e.c

@@ -217,11 +217,7 @@ static int __init it8761e_gpio_init(void)
 static void __exit it8761e_gpio_exit(void)
 {
 	if (gpio_ba) {
-		int ret = gpiochip_remove(&it8761e_gpio_chip);
-
-		WARN(ret, "%s(): gpiochip_remove() failed, ret=%d\n",
-				__func__, ret);
-
+		gpiochip_remove(&it8761e_gpio_chip);
 		release_region(gpio_ba, GPIO_IOSIZE);
 		gpio_ba = 0;
 	}

drivers/gpio/gpio-janz-ttl.c

@@ -194,14 +194,8 @@ static int ttl_probe(struct platform_device *pdev)
 static int ttl_remove(struct platform_device *pdev)
 {
 	struct ttl_module *mod = platform_get_drvdata(pdev);
-	struct device *dev = &pdev->dev;
-	int ret;
 
-	ret = gpiochip_remove(&mod->gpio);
-	if (ret) {
-		dev_err(dev, "unable to remove GPIO chip\n");
-		return ret;
-	}
+	gpiochip_remove(&mod->gpio);
 
 	return 0;
 }

drivers/gpio/gpio-kempld.c

@@ -199,7 +199,8 @@ static int kempld_gpio_remove(struct platform_device *pdev)
 {
 	struct kempld_gpio_data *gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&gpio->chip);
+	gpiochip_remove(&gpio->chip);
+	return 0;
 }
 
 static struct platform_driver kempld_gpio_driver = {

drivers/gpio/gpio-lp3943.c

@@ -216,7 +216,8 @@ static int lp3943_gpio_remove(struct platform_device *pdev)
 {
 	struct lp3943_gpio *lp3943_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&lp3943_gpio->chip);
+	gpiochip_remove(&lp3943_gpio->chip);
+	return 0;
 }
 
 static const struct of_device_id lp3943_gpio_of_match[] = {

drivers/gpio/gpio-lpc32xx.c

@@ -560,7 +560,7 @@ static int lpc32xx_gpio_probe(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_OF
-static struct of_device_id lpc32xx_gpio_of_match[] = {
+static const struct of_device_id lpc32xx_gpio_of_match[] = {
 	{ .compatible = "nxp,lpc3220-gpio", },
 	{ },
 };

drivers/gpio/gpio-lynxpoint.c

@@ -25,9 +25,7 @@
 #include <linux/types.h>
 #include <linux/bitops.h>
 #include <linux/interrupt.h>
-#include <linux/irq.h>
 #include <linux/gpio.h>
-#include <linux/irqdomain.h>
 #include <linux/slab.h>
 #include <linux/acpi.h>
 #include <linux/platform_device.h>
@@ -62,7 +60,6 @@
 
 struct lp_gpio {
 	struct gpio_chip	chip;
-	struct irq_domain	*domain;
 	struct platform_device	*pdev;
 	spinlock_t		lock;
 	unsigned long		reg_base;
@@ -151,7 +148,8 @@ static void lp_gpio_free(struct gpio_chip *chip, unsigned offset)
 
 static int lp_irq_type(struct irq_data *d, unsigned type)
 {
-	struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
 	u32 hwirq = irqd_to_hwirq(d);
 	unsigned long flags;
 	u32 value;
@@ -236,16 +234,11 @@ static int lp_gpio_direction_output(struct gpio_chip *chip,
 	return 0;
 }
 
-static int lp_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
-	struct lp_gpio *lg = container_of(chip, struct lp_gpio, chip);
-	return irq_create_mapping(lg->domain, offset);
-}
-
 static void lp_gpio_irq_handler(unsigned hwirq, struct irq_desc *desc)
 {
 	struct irq_data *data = irq_desc_get_irq_data(desc);
-	struct lp_gpio *lg = irq_data_get_irq_handler_data(data);
+	struct gpio_chip *gc = irq_desc_get_handler_data(desc);
+	struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
 	struct irq_chip *chip = irq_data_get_irq_chip(data);
 	u32 base, pin, mask;
 	unsigned long reg, ena, pending;
@@ -262,7 +255,7 @@ static void lp_gpio_irq_handler(unsigned hwirq, struct irq_desc *desc)
 			mask = BIT(pin);
 			/* Clear before handling so we don't lose an edge */
 			outl(mask, reg);
-			irq = irq_find_mapping(lg->domain, base + pin);
+			irq = irq_find_mapping(lg->chip.irqdomain, base + pin);
 			generic_handle_irq(irq);
 		}
 	}
@@ -279,7 +272,8 @@ static void lp_irq_mask(struct irq_data *d)
 
 static void lp_irq_enable(struct irq_data *d)
 {
-	struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
 	u32 hwirq = irqd_to_hwirq(d);
 	unsigned long reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
 	unsigned long flags;
@@ -291,7 +285,8 @@ static void lp_irq_enable(struct irq_data *d)
 
 static void lp_irq_disable(struct irq_data *d)
 {
-	struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct lp_gpio *lg = container_of(gc, struct lp_gpio, chip);
 	u32 hwirq = irqd_to_hwirq(d);
 	unsigned long reg = lp_gpio_reg(&lg->chip, hwirq, LP_INT_ENABLE);
 	unsigned long flags;
@@ -301,26 +296,6 @@ static void lp_irq_disable(struct irq_data *d)
 	spin_unlock_irqrestore(&lg->lock, flags);
 }
 
-static int lp_irq_reqres(struct irq_data *d)
-{
-	struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
-
-	if (gpio_lock_as_irq(&lg->chip, irqd_to_hwirq(d))) {
-		dev_err(lg->chip.dev,
-			"unable to lock HW IRQ %lu for IRQ\n",
-			irqd_to_hwirq(d));
-		return -EINVAL;
-	}
-	return 0;
-}
-
-static void lp_irq_relres(struct irq_data *d)
-{
-	struct lp_gpio *lg = irq_data_get_irq_chip_data(d);
-
-	gpio_unlock_as_irq(&lg->chip, irqd_to_hwirq(d));
-}
-
 static struct irq_chip lp_irqchip = {
 	.name = "LP-GPIO",
 	.irq_mask = lp_irq_mask,
@@ -328,8 +303,6 @@ static struct irq_chip lp_irqchip = {
 	.irq_enable = lp_irq_enable,
 	.irq_disable = lp_irq_disable,
 	.irq_set_type = lp_irq_type,
-	.irq_request_resources = lp_irq_reqres,
-	.irq_release_resources = lp_irq_relres,
 	.flags = IRQCHIP_SKIP_SET_WAKE,
 };
 
@@ -348,22 +321,6 @@ static void lp_gpio_irq_init_hw(struct lp_gpio *lg)
 	}
 }
 
-static int lp_gpio_irq_map(struct irq_domain *d, unsigned int irq,
-			    irq_hw_number_t hwirq)
-{
-	struct lp_gpio *lg = d->host_data;
-
-	irq_set_chip_and_handler(irq, &lp_irqchip, handle_simple_irq);
-	irq_set_chip_data(irq, lg);
-	irq_set_irq_type(irq, IRQ_TYPE_NONE);
-
-	return 0;
-}
-
-static const struct irq_domain_ops lp_gpio_irq_ops = {
-	.map = lp_gpio_irq_map,
-};
-
 static int lp_gpio_probe(struct platform_device *pdev)
 {
 	struct lp_gpio *lg;
@@ -371,7 +328,6 @@ static int lp_gpio_probe(struct platform_device *pdev)
 	struct resource *io_rc, *irq_rc;
 	struct device *dev = &pdev->dev;
 	unsigned long reg_len;
-	unsigned hwirq;
 	int ret = -ENODEV;
 
 	lg = devm_kzalloc(dev, sizeof(struct lp_gpio), GFP_KERNEL);
@@ -414,27 +370,28 @@ static int lp_gpio_probe(struct platform_device *pdev)
 	gc->can_sleep = false;
 	gc->dev = dev;
 
+	ret = gpiochip_add(gc);
+	if (ret) {
+		dev_err(dev, "failed adding lp-gpio chip\n");
+		return ret;
+	}
+
 	/* set up interrupts  */
 	if (irq_rc && irq_rc->start) {
-		hwirq = irq_rc->start;
-		gc->to_irq = lp_gpio_to_irq;
-
-		lg->domain = irq_domain_add_linear(NULL, LP_NUM_GPIO,
-						   &lp_gpio_irq_ops, lg);
-		if (!lg->domain)
-			return -ENXIO;
-
 		lp_gpio_irq_init_hw(lg);
-
-		irq_set_handler_data(hwirq, lg);
-		irq_set_chained_handler(hwirq, lp_gpio_irq_handler);
-	}
-
-	ret = gpiochip_add(gc);
+		ret = gpiochip_irqchip_add(gc, &lp_irqchip, 0,
+					   handle_simple_irq, IRQ_TYPE_NONE);
 		if (ret) {
-		dev_err(dev, "failed adding lp-gpio chip\n");
+			dev_err(dev, "failed to add irqchip\n");
+			gpiochip_remove(gc);
 			return ret;
 		}
+
+		gpiochip_set_chained_irqchip(gc, &lp_irqchip,
+					     (unsigned)irq_rc->start,
+					     lp_gpio_irq_handler);
+	}
+
 	pm_runtime_enable(dev);
 
 	return 0;
@@ -465,11 +422,8 @@ MODULE_DEVICE_TABLE(acpi, lynxpoint_gpio_acpi_match);
 static int lp_gpio_remove(struct platform_device *pdev)
 {
 	struct lp_gpio *lg = platform_get_drvdata(pdev);
-	int err;
 	pm_runtime_disable(&pdev->dev);
-	err = gpiochip_remove(&lg->chip);
-	if (err)
-		dev_warn(&pdev->dev, "failed to remove gpio_chip.\n");
+	gpiochip_remove(&lg->chip);
 	return 0;
 }
 

drivers/gpio/gpio-max730x.c

@@ -228,21 +228,16 @@ EXPORT_SYMBOL_GPL(__max730x_probe);
 int __max730x_remove(struct device *dev)
 {
 	struct max7301 *ts = dev_get_drvdata(dev);
-	int ret;
 
 	if (ts == NULL)
 		return -ENODEV;
 
 	/* Power down the chip and disable IRQ output */
 	ts->write(dev, 0x04, 0x00);
-
-	ret = gpiochip_remove(&ts->chip);
-	if (!ret)
+	gpiochip_remove(&ts->chip);
 	mutex_destroy(&ts->lock);
-	else
-		dev_err(dev, "Failed to remove GPIO controller: %d\n", ret);
-
-	return ret;
+	kfree(ts);
+	return 0;
 }
 EXPORT_SYMBOL_GPL(__max730x_remove);
 

drivers/gpio/gpio-max732x.c

@@ -676,12 +676,7 @@ static int max732x_remove(struct i2c_client *client)
 		}
 	}
 
-	ret = gpiochip_remove(&chip->gpio_chip);
-	if (ret) {
-		dev_err(&client->dev, "%s failed, %d\n",
-				"gpiochip_remove()", ret);
-		return ret;
-	}
+	gpiochip_remove(&chip->gpio_chip);
 
 	max732x_irq_teardown(chip);
 

drivers/gpio/gpio-mc33880.c

@@ -149,20 +149,15 @@ static int mc33880_probe(struct spi_device *spi)
 static int mc33880_remove(struct spi_device *spi)
 {
 	struct mc33880 *mc;
-	int ret;
 
 	mc = spi_get_drvdata(spi);
 	if (mc == NULL)
 		return -ENODEV;
 
-	ret = gpiochip_remove(&mc->chip);
-	if (!ret)
+	gpiochip_remove(&mc->chip);
 	mutex_destroy(&mc->lock);
-	else
-		dev_err(&spi->dev, "Failed to remove the GPIO controller: %d\n",
-			ret);
 
-	return ret;
+	return 0;
 }
 
 static struct spi_driver mc33880_driver = {

drivers/gpio/gpio-mc9s08dz60.c

@@ -118,7 +118,8 @@ static int mc9s08dz60_remove(struct i2c_client *client)
 
 	mc9s = i2c_get_clientdata(client);
 
-	return gpiochip_remove(&mc9s->chip);
+	gpiochip_remove(&mc9s->chip);
+	return 0;
 }
 
 static const struct i2c_device_id mc9s08dz60_id[] = {

drivers/gpio/gpio-mcp23s08.c

@@ -812,16 +812,14 @@ static int mcp230xx_probe(struct i2c_client *client,
 static int mcp230xx_remove(struct i2c_client *client)
 {
 	struct mcp23s08 *mcp = i2c_get_clientdata(client);
-	int status;
 
 	if (client->irq && mcp->irq_controller)
 		mcp23s08_irq_teardown(mcp);
 
-	status = gpiochip_remove(&mcp->chip);
-	if (status == 0)
+	gpiochip_remove(&mcp->chip);
 	kfree(mcp);
 
-	return status;
+	return 0;
 }
 
 static const struct i2c_device_id mcp230xx_id[] = {
@@ -960,13 +958,10 @@ static int mcp23s08_probe(struct spi_device *spi)
 
 fail:
 	for (addr = 0; addr < ARRAY_SIZE(data->mcp); addr++) {
-		int tmp;
 
 		if (!data->mcp[addr])
 			continue;
-		tmp = gpiochip_remove(&data->mcp[addr]->chip);
-		if (tmp < 0)
-			dev_err(&spi->dev, "%s --> %d\n", "remove", tmp);
+		gpiochip_remove(&data->mcp[addr]->chip);
 	}
 	kfree(data);
 	return status;
@@ -976,23 +971,16 @@ static int mcp23s08_remove(struct spi_device *spi)
 {
 	struct mcp23s08_driver_data	*data = spi_get_drvdata(spi);
 	unsigned			addr;
-	int				status = 0;
 
 	for (addr = 0; addr < ARRAY_SIZE(data->mcp); addr++) {
-		int tmp;
 
 		if (!data->mcp[addr])
 			continue;
 
-		tmp = gpiochip_remove(&data->mcp[addr]->chip);
-		if (tmp < 0) {
-			dev_err(&spi->dev, "%s --> %d\n", "remove", tmp);
-			status = tmp;
+		gpiochip_remove(&data->mcp[addr]->chip);
 	}
-	}
-	if (status == 0)
 	kfree(data);
-	return status;
+	return 0;
 }
 
 static const struct spi_device_id mcp23s08_ids[] = {

drivers/gpio/gpio-ml-ioh.c

@@ -497,8 +497,7 @@ static int ioh_gpio_probe(struct pci_dev *pdev,
 err_gpiochip_add:
 	while (--i >= 0) {
 		chip--;
-		if (gpiochip_remove(&chip->gpio))
-			dev_err(&pdev->dev, "Failed gpiochip_remove(%d)\n", i);
+		gpiochip_remove(&chip->gpio);
 	}
 	kfree(chip_save);
 
@@ -519,7 +518,6 @@ static int ioh_gpio_probe(struct pci_dev *pdev,
 
 static void ioh_gpio_remove(struct pci_dev *pdev)
 {
-	int err;
 	int i;
 	struct ioh_gpio *chip = pci_get_drvdata(pdev);
 	void *chip_save;
@@ -530,9 +528,7 @@ static void ioh_gpio_remove(struct pci_dev *pdev)
 
 	for (i = 0; i < 8; i++, chip++) {
 		irq_free_descs(chip->irq_base, num_ports[i]);
-		err = gpiochip_remove(&chip->gpio);
-		if (err)
-			dev_err(&pdev->dev, "Failed gpiochip_remove\n");
+		gpiochip_remove(&chip->gpio);
 	}
 
 	chip = chip_save;

drivers/gpio/gpio-msm-v2.c

@@ -438,10 +438,7 @@ MODULE_DEVICE_TABLE(of, msm_gpio_of_match);
 
 static int msm_gpio_remove(struct platform_device *dev)
 {
-	int ret = gpiochip_remove(&msm_gpio.gpio_chip);
-
-	if (ret < 0)
-		return ret;
+	gpiochip_remove(&msm_gpio.gpio_chip);
 
 	irq_set_handler(msm_gpio.summary_irq, NULL);
 

drivers/gpio/gpio-mxc.c

@@ -485,7 +485,7 @@ static int mxc_gpio_probe(struct platform_device *pdev)
 out_irqdesc_free:
 	irq_free_descs(irq_base, 32);
 out_gpiochip_remove:
-	WARN_ON(gpiochip_remove(&port->bgc.gc) < 0);
+	gpiochip_remove(&port->bgc.gc);
 out_bgpio_remove:
 	bgpio_remove(&port->bgc);
 out_bgio:

drivers/gpio/gpio-octeon.c

@@ -129,7 +129,8 @@ static int octeon_gpio_probe(struct platform_device *pdev)
 static int octeon_gpio_remove(struct platform_device *pdev)
 {
 	struct gpio_chip *chip = pdev->dev.platform_data;
-	return gpiochip_remove(chip);
+	gpiochip_remove(chip);
+	return 0;
 }
 
 static struct of_device_id octeon_gpio_match[] = {

drivers/gpio/gpio-palmas.c

@@ -210,7 +210,8 @@ static int palmas_gpio_remove(struct platform_device *pdev)
 {
 	struct palmas_gpio *palmas_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&palmas_gpio->gpio_chip);
+	gpiochip_remove(&palmas_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver palmas_gpio_driver = {

drivers/gpio/gpio-pca953x.c

@@ -765,12 +765,7 @@ static int pca953x_remove(struct i2c_client *client)
 		}
 	}
 
-	ret = gpiochip_remove(&chip->gpio_chip);
-	if (ret) {
-		dev_err(&client->dev, "%s failed, %d\n",
-				"gpiochip_remove()", ret);
-		return ret;
-	}
+	gpiochip_remove(&chip->gpio_chip);
 
 	return 0;
 }

drivers/gpio/gpio-pcf857x.c

@@ -444,9 +444,7 @@ static int pcf857x_remove(struct i2c_client *client)
 	if (client->irq)
 		pcf857x_irq_domain_cleanup(gpio);
 
-	status = gpiochip_remove(&gpio->chip);
-	if (status)
-		dev_err(&client->dev, "%s --> %d\n", "remove", status);
+	gpiochip_remove(&gpio->chip);
 	return status;
 }
 

drivers/gpio/gpio-pch.c

@@ -426,9 +426,7 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 
 err_request_irq:
 	irq_free_descs(irq_base, gpio_pins[chip->ioh]);
-
-	if (gpiochip_remove(&chip->gpio))
-		dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
+	gpiochip_remove(&chip->gpio);
 
 err_gpiochip_add:
 	pci_iounmap(pdev, chip->base);
@@ -447,7 +445,6 @@ static int pch_gpio_probe(struct pci_dev *pdev,
 
 static void pch_gpio_remove(struct pci_dev *pdev)
 {
-	int err;
 	struct pch_gpio *chip = pci_get_drvdata(pdev);
 
 	if (chip->irq_base != -1) {
@@ -456,10 +453,7 @@ static void pch_gpio_remove(struct pci_dev *pdev)
 		irq_free_descs(chip->irq_base, gpio_pins[chip->ioh]);
 	}
 
-	err = gpiochip_remove(&chip->gpio);
-	if (err)
-		dev_err(&pdev->dev, "Failed gpiochip_remove\n");
-
+	gpiochip_remove(&chip->gpio);
 	pci_iounmap(pdev, chip->base);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);

drivers/gpio/gpio-pxa.c

@@ -498,7 +498,7 @@ static int pxa_gpio_nums(struct platform_device *pdev)
 }
 
 #ifdef CONFIG_OF
-static struct of_device_id pxa_gpio_dt_ids[] = {
+static const struct of_device_id pxa_gpio_dt_ids[] = {
 	{ .compatible = "intel,pxa25x-gpio",	.data = &pxa25x_id, },
 	{ .compatible = "intel,pxa26x-gpio",	.data = &pxa26x_id, },
 	{ .compatible = "intel,pxa27x-gpio",	.data = &pxa27x_id, },
@@ -649,6 +649,11 @@ static int pxa_gpio_probe(struct platform_device *pdev)
 						 handle_edge_irq);
 			set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
 		}
+	} else {
+		if (irq0 > 0)
+			irq_set_chained_handler(irq0, pxa_gpio_demux_handler);
+		if (irq1 > 0)
+			irq_set_chained_handler(irq1, pxa_gpio_demux_handler);
 	}
 
 	irq_set_chained_handler(irq_mux, pxa_gpio_demux_handler);

drivers/gpio/gpio-rc5t583.c

@@ -148,7 +148,8 @@ static int rc5t583_gpio_remove(struct platform_device *pdev)
 {
 	struct rc5t583_gpio *rc5t583_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&rc5t583_gpio->gpio_chip);
+	gpiochip_remove(&rc5t583_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver rc5t583_gpio_driver = {

drivers/gpio/gpio-rcar.c

@@ -240,9 +240,9 @@ static int gpio_rcar_get(struct gpio_chip *chip, unsigned offset)
 	/* testing on r8a7790 shows that INDT does not show correct pin state
 	 * when configured as output, so use OUTDT in case of output pins */
 	if (gpio_rcar_read(gpio_to_priv(chip), INOUTSEL) & bit)
-		return (int)(gpio_rcar_read(gpio_to_priv(chip), OUTDT) & bit);
+		return !!(gpio_rcar_read(gpio_to_priv(chip), OUTDT) & bit);
 	else
-		return (int)(gpio_rcar_read(gpio_to_priv(chip), INDT) & bit);
+		return !!(gpio_rcar_read(gpio_to_priv(chip), INDT) & bit);
 }
 
 static void gpio_rcar_set(struct gpio_chip *chip, unsigned offset, int value)
@@ -472,11 +472,8 @@ static int gpio_rcar_probe(struct platform_device *pdev)
 static int gpio_rcar_remove(struct platform_device *pdev)
 {
 	struct gpio_rcar_priv *p = platform_get_drvdata(pdev);
-	int ret;
 
-	ret = gpiochip_remove(&p->gpio_chip);
-	if (ret)
-		return ret;
+	gpiochip_remove(&p->gpio_chip);
 
 	irq_domain_remove(p->irq_domain);
 	pm_runtime_put(&pdev->dev);

drivers/gpio/gpio-rdc321x.c

@@ -199,14 +199,11 @@ static int rdc321x_gpio_probe(struct platform_device *pdev)
 
 static int rdc321x_gpio_remove(struct platform_device *pdev)
 {
-	int ret;
 	struct rdc321x_gpio *rdc321x_gpio_dev = platform_get_drvdata(pdev);
 
-	ret = gpiochip_remove(&rdc321x_gpio_dev->chip);
-	if (ret)
-		dev_err(&pdev->dev, "failed to unregister chip\n");
+	gpiochip_remove(&rdc321x_gpio_dev->chip);
 
-	return ret;
+	return 0;
 }
 
 static struct platform_driver rdc321x_gpio_driver = {

drivers/gpio/gpio-sch.c

@@ -290,8 +290,7 @@ static int sch_gpio_probe(struct platform_device *pdev)
 	return 0;
 
 err_sch_gpio_resume:
-	if (gpiochip_remove(&sch_gpio_core))
-		dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
+	gpiochip_remove(&sch_gpio_core);
 
 err_sch_gpio_core:
 	release_region(res->start, resource_size(res));
@@ -304,23 +303,14 @@ static int sch_gpio_remove(struct platform_device *pdev)
 {
 	struct resource *res;
 	if (gpio_ba) {
-		int err;
 
-		err  = gpiochip_remove(&sch_gpio_core);
-		if (err)
-			dev_err(&pdev->dev, "%s failed, %d\n",
-				"gpiochip_remove()", err);
-		err = gpiochip_remove(&sch_gpio_resume);
-		if (err)
-			dev_err(&pdev->dev, "%s failed, %d\n",
-				"gpiochip_remove()", err);
+		gpiochip_remove(&sch_gpio_core);
+		gpiochip_remove(&sch_gpio_resume);
 
 		res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 
 		release_region(res->start, resource_size(res));
 		gpio_ba = 0;
-
-		return err;
 	}
 
 	return 0;

drivers/gpio/gpio-sch311x.c

@@ -291,14 +291,12 @@ static int sch311x_gpio_remove(struct platform_device *pdev)
 {
 	struct sch311x_pdev_data *pdata = pdev->dev.platform_data;
 	struct sch311x_gpio_priv *priv = platform_get_drvdata(pdev);
-	int err, i;
+	int i;
 
 	release_region(pdata->runtime_reg + GP1, 6);
 
 	for (i = 0; i < ARRAY_SIZE(priv->blocks); i++) {
-		err = gpiochip_remove(&priv->blocks[i].chip);
-		if (err)
-			return err;
+		gpiochip_remove(&priv->blocks[i].chip);
 		dev_info(&pdev->dev,
 			 "SMSC SCH311x GPIO block %d unregistered.\n", i);
 	}

drivers/gpio/gpio-sodaville.c

@@ -265,9 +265,7 @@ static void sdv_gpio_remove(struct pci_dev *pdev)
 	free_irq(pdev->irq, sd);
 	irq_free_descs(sd->irq_base, SDV_NUM_PUB_GPIOS);
 
-	if (gpiochip_remove(&sd->bgpio.gc))
-		dev_err(&pdev->dev, "gpiochip_remove() failed.\n");
-
+	gpiochip_remove(&sd->bgpio.gc);
 	pci_release_region(pdev, GPIO_BAR);
 	iounmap(sd->gpio_pub_base);
 	pci_disable_device(pdev);

drivers/gpio/gpio-stmpe.c

@@ -10,8 +10,6 @@
 #include <linux/platform_device.h>
 #include <linux/slab.h>
 #include <linux/gpio.h>
-#include <linux/irq.h>
-#include <linux/irqdomain.h>
 #include <linux/interrupt.h>
 #include <linux/of.h>
 #include <linux/mfd/stmpe.h>
@@ -31,9 +29,7 @@ struct stmpe_gpio {
 	struct stmpe *stmpe;
 	struct device *dev;
 	struct mutex irq_lock;
-	struct irq_domain *domain;
 	unsigned norequest_mask;
-
 	/* Caches of interrupt control registers for bus_lock */
 	u8 regs[CACHE_NR_REGS][CACHE_NR_BANKS];
 	u8 oldregs[CACHE_NR_REGS][CACHE_NR_BANKS];
@@ -101,13 +97,6 @@ static int stmpe_gpio_direction_input(struct gpio_chip *chip,
 	return stmpe_set_bits(stmpe, reg, mask, 0);
 }
 
-static int stmpe_gpio_to_irq(struct gpio_chip *chip, unsigned offset)
-{
-	struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(chip);
-
-	return irq_create_mapping(stmpe_gpio->domain, offset);
-}
-
 static int stmpe_gpio_request(struct gpio_chip *chip, unsigned offset)
 {
 	struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(chip);
@@ -126,14 +115,14 @@ static struct gpio_chip template_chip = {
 	.get			= stmpe_gpio_get,
 	.direction_output	= stmpe_gpio_direction_output,
 	.set			= stmpe_gpio_set,
-	.to_irq			= stmpe_gpio_to_irq,
 	.request		= stmpe_gpio_request,
 	.can_sleep		= true,
 };
 
 static int stmpe_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 {
-	struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc);
 	int offset = d->hwirq;
 	int regoffset = offset / 8;
 	int mask = 1 << (offset % 8);
@@ -160,14 +149,16 @@ static int stmpe_gpio_irq_set_type(struct irq_data *d, unsigned int type)
 
 static void stmpe_gpio_irq_lock(struct irq_data *d)
 {
-	struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc);
 
 	mutex_lock(&stmpe_gpio->irq_lock);
 }
 
 static void stmpe_gpio_irq_sync_unlock(struct irq_data *d)
 {
-	struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc);
 	struct stmpe *stmpe = stmpe_gpio->stmpe;
 	int num_banks = DIV_ROUND_UP(stmpe->num_gpios, 8);
 	static const u8 regmap[] = {
@@ -200,7 +191,8 @@ static void stmpe_gpio_irq_sync_unlock(struct irq_data *d)
 
 static void stmpe_gpio_irq_mask(struct irq_data *d)
 {
-	struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc);
 	int offset = d->hwirq;
 	int regoffset = offset / 8;
 	int mask = 1 << (offset % 8);
@@ -210,7 +202,8 @@ static void stmpe_gpio_irq_mask(struct irq_data *d)
 
 static void stmpe_gpio_irq_unmask(struct irq_data *d)
 {
-	struct stmpe_gpio *stmpe_gpio = irq_data_get_irq_chip_data(d);
+	struct gpio_chip *gc = irq_data_get_irq_chip_data(d);
+	struct stmpe_gpio *stmpe_gpio = to_stmpe_gpio(gc);
 	int offset = d->hwirq;
 	int regoffset = offset / 8;
 	int mask = 1 << (offset % 8);
@@ -253,7 +246,7 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev)
 		while (stat) {
 			int bit = __ffs(stat);
 			int line = bank * 8 + bit;
-			int child_irq = irq_find_mapping(stmpe_gpio->domain,
+			int child_irq = irq_find_mapping(stmpe_gpio->chip.irqdomain,
 							 line);
 
 			handle_nested_irq(child_irq);
@@ -271,56 +264,6 @@ static irqreturn_t stmpe_gpio_irq(int irq, void *dev)
 	return IRQ_HANDLED;
 }
 
-static int stmpe_gpio_irq_map(struct irq_domain *d, unsigned int irq,
-			      irq_hw_number_t hwirq)
-{
-	struct stmpe_gpio *stmpe_gpio = d->host_data;
-
-	if (!stmpe_gpio)
-		return -EINVAL;
-
-	irq_set_chip_data(irq, stmpe_gpio);
-	irq_set_chip_and_handler(irq, &stmpe_gpio_irq_chip,
-				 handle_simple_irq);
-	irq_set_nested_thread(irq, 1);
-#ifdef CONFIG_ARM
-	set_irq_flags(irq, IRQF_VALID);
-#else
-	irq_set_noprobe(irq);
-#endif
-
-	return 0;
-}
-
-static void stmpe_gpio_irq_unmap(struct irq_domain *d, unsigned int irq)
-{
-#ifdef CONFIG_ARM
-	set_irq_flags(irq, 0);
-#endif
-	irq_set_chip_and_handler(irq, NULL, NULL);
-	irq_set_chip_data(irq, NULL);
-}
-
-static const struct irq_domain_ops stmpe_gpio_irq_simple_ops = {
-	.unmap = stmpe_gpio_irq_unmap,
-	.map = stmpe_gpio_irq_map,
-	.xlate = irq_domain_xlate_twocell,
-};
-
-static int stmpe_gpio_irq_init(struct stmpe_gpio *stmpe_gpio,
-		struct device_node *np)
-{
-	stmpe_gpio->domain = irq_domain_add_simple(np,
-				stmpe_gpio->chip.ngpio, 0,
-				&stmpe_gpio_irq_simple_ops, stmpe_gpio);
-	if (!stmpe_gpio->domain) {
-		dev_err(stmpe_gpio->dev, "failed to create irqdomain\n");
-		return -ENOSYS;
-	}
-
-	return 0;
-}
-
 static int stmpe_gpio_probe(struct platform_device *pdev)
 {
 	struct stmpe *stmpe = dev_get_drvdata(pdev->dev.parent);
@@ -358,30 +301,37 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
 
 	if (irq < 0)
 		dev_info(&pdev->dev,
-			"device configured in no-irq mode; "
+			"device configured in no-irq mode: "
 			"irqs are not available\n");
 
 	ret = stmpe_enable(stmpe, STMPE_BLOCK_GPIO);
 	if (ret)
 		goto out_free;
 
-	if (irq >= 0) {
-		ret = stmpe_gpio_irq_init(stmpe_gpio, np);
-		if (ret)
-			goto out_disable;
-
-		ret = request_threaded_irq(irq, NULL, stmpe_gpio_irq,
-				IRQF_ONESHOT, "stmpe-gpio", stmpe_gpio);
+	if (irq > 0) {
+		ret = devm_request_threaded_irq(&pdev->dev, irq, NULL,
+				stmpe_gpio_irq, IRQF_ONESHOT,
+				"stmpe-gpio", stmpe_gpio);
 		if (ret) {
 			dev_err(&pdev->dev, "unable to get irq: %d\n", ret);
 			goto out_disable;
 		}
+		ret =  gpiochip_irqchip_add(&stmpe_gpio->chip,
+					    &stmpe_gpio_irq_chip,
+					    0,
+					    handle_simple_irq,
+					    IRQ_TYPE_NONE);
+		if (ret) {
+			dev_err(&pdev->dev,
+				"could not connect irqchip to gpiochip\n");
+			return ret;
+		}
 	}
 
 	ret = gpiochip_add(&stmpe_gpio->chip);
 	if (ret) {
 		dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret);
-		goto out_freeirq;
+		goto out_disable;
 	}
 
 	if (pdata && pdata->setup)
@@ -391,9 +341,6 @@ static int stmpe_gpio_probe(struct platform_device *pdev)
 
 	return 0;
 
-out_freeirq:
-	if (irq >= 0)
-		free_irq(irq, stmpe_gpio);
 out_disable:
 	stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
 out_free:
@@ -406,24 +353,14 @@ static int stmpe_gpio_remove(struct platform_device *pdev)
 	struct stmpe_gpio *stmpe_gpio = platform_get_drvdata(pdev);
 	struct stmpe *stmpe = stmpe_gpio->stmpe;
 	struct stmpe_gpio_platform_data *pdata = stmpe->pdata->gpio;
-	int irq = platform_get_irq(pdev, 0);
-	int ret;
 
 	if (pdata && pdata->remove)
 		pdata->remove(stmpe, stmpe_gpio->chip.base);
 
-	ret = gpiochip_remove(&stmpe_gpio->chip);
-	if (ret < 0) {
-		dev_err(stmpe_gpio->dev,
-			"unable to remove gpiochip: %d\n", ret);
-		return ret;
-	}
+	gpiochip_remove(&stmpe_gpio->chip);
 
 	stmpe_disable(stmpe, STMPE_BLOCK_GPIO);
 
-	if (irq >= 0)
-		free_irq(irq, stmpe_gpio);
-
 	kfree(stmpe_gpio);
 
 	return 0;

drivers/gpio/gpio-sx150x.c

@@ -615,19 +615,16 @@ static int sx150x_probe(struct i2c_client *client,
 
 	return 0;
 probe_fail_post_gpiochip_add:
-	WARN_ON(gpiochip_remove(&chip->gpio_chip) < 0);
+	gpiochip_remove(&chip->gpio_chip);
 	return rc;
 }
 
 static int sx150x_remove(struct i2c_client *client)
 {
 	struct sx150x_chip *chip;
-	int rc;
 
 	chip = i2c_get_clientdata(client);
-	rc = gpiochip_remove(&chip->gpio_chip);
-	if (rc < 0)
-		return rc;
+	gpiochip_remove(&chip->gpio_chip);
 
 	if (chip->irq_summary >= 0)
 		sx150x_remove_irq_chip(chip);

drivers/gpio/gpio-syscon.c

@@ -172,7 +172,8 @@ static int syscon_gpio_remove(struct platform_device *pdev)
 {
 	struct syscon_gpio_priv *priv = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&priv->chip);
+	gpiochip_remove(&priv->chip);
+	return 0;
 }
 
 static struct platform_driver syscon_gpio_driver = {

drivers/gpio/gpio-tb10x.c

@@ -291,7 +291,6 @@ static int tb10x_gpio_probe(struct platform_device *pdev)
 static int __exit tb10x_gpio_remove(struct platform_device *pdev)
 {
 	struct tb10x_gpio *tb10x_gpio = platform_get_drvdata(pdev);
-	int ret;
 
 	if (tb10x_gpio->gc.to_irq) {
 		irq_remove_generic_chip(tb10x_gpio->domain->gc->gc[0],
@@ -300,9 +299,7 @@ static int __exit tb10x_gpio_remove(struct platform_device *pdev)
 		irq_domain_remove(tb10x_gpio->domain);
 		free_irq(tb10x_gpio->irq, tb10x_gpio);
 	}
-	ret = gpiochip_remove(&tb10x_gpio->gc);
-	if (ret)
-		return ret;
+	gpiochip_remove(&tb10x_gpio->gc);
 
 	return 0;
 }

drivers/gpio/gpio-tc3589x.c

@@ -313,17 +313,11 @@ static int tc3589x_gpio_remove(struct platform_device *pdev)
 	struct tc3589x_gpio *tc3589x_gpio = platform_get_drvdata(pdev);
 	struct tc3589x *tc3589x = tc3589x_gpio->tc3589x;
 	struct tc3589x_gpio_platform_data *pdata = tc3589x->pdata->gpio;
-	int ret;
 
 	if (pdata && pdata->remove)
 		pdata->remove(tc3589x, tc3589x_gpio->chip.base);
 
-	ret = gpiochip_remove(&tc3589x_gpio->chip);
-	if (ret < 0) {
-		dev_err(tc3589x_gpio->dev,
-			"unable to remove gpiochip: %d\n", ret);
-		return ret;
-	}
+	gpiochip_remove(&tc3589x_gpio->chip);
 
 	return 0;
 }

drivers/gpio/gpio-timberdale.c

@@ -307,7 +307,6 @@ static int timbgpio_probe(struct platform_device *pdev)
 
 static int timbgpio_remove(struct platform_device *pdev)
 {
-	int err;
 	struct timbgpio_platform_data *pdata = dev_get_platdata(&pdev->dev);
 	struct timbgpio *tgpio = platform_get_drvdata(pdev);
 	int irq = platform_get_irq(pdev, 0);
@@ -323,9 +322,7 @@ static int timbgpio_remove(struct platform_device *pdev)
 		irq_set_handler_data(irq, NULL);
 	}
 
-	err = gpiochip_remove(&tgpio->gpio);
-	if (err)
-		printk(KERN_ERR DRIVER_NAME": failed to remove gpio_chip\n");
+	gpiochip_remove(&tgpio->gpio);
 
 	return 0;
 }

drivers/gpio/gpio-tps6586x.c

@@ -137,7 +137,8 @@ static int tps6586x_gpio_remove(struct platform_device *pdev)
 {
 	struct tps6586x_gpio *tps6586x_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&tps6586x_gpio->gpio_chip);
+	gpiochip_remove(&tps6586x_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver tps6586x_gpio_driver = {

drivers/gpio/gpio-tps65910.c

@@ -190,7 +190,8 @@ static int tps65910_gpio_remove(struct platform_device *pdev)
 {
 	struct tps65910_gpio *tps65910_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&tps65910_gpio->gpio_chip);
+	gpiochip_remove(&tps65910_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver tps65910_gpio_driver = {

drivers/gpio/gpio-tps65912.c

@@ -117,7 +117,8 @@ static int tps65912_gpio_remove(struct platform_device *pdev)
 {
 	struct tps65912_gpio_data  *tps65912_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&tps65912_gpio->gpio_chip);
+	gpiochip_remove(&tps65912_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver tps65912_gpio_driver = {

drivers/gpio/gpio-ts5500.c

@@ -427,8 +427,7 @@ static int ts5500_dio_probe(struct platform_device *pdev)
 
 	return 0;
 cleanup:
-	if (gpiochip_remove(&priv->gpio_chip))
-		dev_err(dev, "failed to remove gpio chip\n");
+	gpiochip_remove(&priv->gpio_chip);
 	return ret;
 }
 
@@ -437,7 +436,8 @@ static int ts5500_dio_remove(struct platform_device *pdev)
 	struct ts5500_priv *priv = platform_get_drvdata(pdev);
 
 	ts5500_disable_irq(priv);
-	return gpiochip_remove(&priv->gpio_chip);
+	gpiochip_remove(&priv->gpio_chip);
+	return 0;
 }
 
 static struct platform_device_id ts5500_dio_ids[] = {

drivers/gpio/gpio-twl4030.c

@@ -554,7 +554,7 @@ static int gpio_twl4030_probe(struct platform_device *pdev)
 
 	platform_set_drvdata(pdev, priv);
 
-	if (pdata && pdata->setup) {
+	if (pdata->setup) {
 		int status;
 
 		status = pdata->setup(&pdev->dev, priv->gpio_chip.base,
@@ -583,9 +583,7 @@ static int gpio_twl4030_remove(struct platform_device *pdev)
 		}
 	}
 
-	status = gpiochip_remove(&priv->gpio_chip);
-	if (status < 0)
-		return status;
+	gpiochip_remove(&priv->gpio_chip);
 
 	if (is_module())
 		return 0;

drivers/gpio/gpio-twl6040.c

@@ -111,7 +111,8 @@ static int gpo_twl6040_probe(struct platform_device *pdev)
 
 static int gpo_twl6040_remove(struct platform_device *pdev)
 {
-	return gpiochip_remove(&twl6040gpo_chip);
+	gpiochip_remove(&twl6040gpo_chip);
+	return 0;
 }
 
 /* Note:  this hardware lives inside an I2C-based multi-function device. */

drivers/gpio/gpio-ucb1400.c

@@ -70,7 +70,7 @@ static int ucb1400_gpio_probe(struct platform_device *dev)
 	if (err)
 		goto err;
 
-	if (ucb && ucb->gpio_setup)
+	if (ucb->gpio_setup)
 		err = ucb->gpio_setup(&dev->dev, ucb->gc.ngpio);
 
 err:
@@ -89,7 +89,7 @@ static int ucb1400_gpio_remove(struct platform_device *dev)
 			return err;
 	}
 
-	err = gpiochip_remove(&ucb->gc);
+	gpiochip_remove(&ucb->gc);
 	return err;
 }
 

drivers/gpio/gpio-viperboard.c

@@ -446,8 +446,7 @@ static int vprbrd_gpio_probe(struct platform_device *pdev)
 	return ret;
 
 err_gpiob:
-	if (gpiochip_remove(&vb_gpio->gpioa))
-		dev_err(&pdev->dev, "%s gpiochip_remove failed\n", __func__);
+	gpiochip_remove(&vb_gpio->gpioa);
 
 err_gpioa:
 	return ret;
@@ -456,13 +455,10 @@ static int vprbrd_gpio_probe(struct platform_device *pdev)
 static int vprbrd_gpio_remove(struct platform_device *pdev)
 {
 	struct vprbrd_gpio *vb_gpio = platform_get_drvdata(pdev);
-	int ret;
 
-	ret = gpiochip_remove(&vb_gpio->gpiob);
-	if (ret == 0)
-		ret = gpiochip_remove(&vb_gpio->gpioa);
+	gpiochip_remove(&vb_gpio->gpiob);
 
-	return ret;
+	return 0;
 }
 
 static struct platform_driver vprbrd_gpio_driver = {

drivers/gpio/gpio-vr41xx.c

@@ -515,7 +515,7 @@ static int giu_probe(struct platform_device *pdev)
 	struct resource *res;
 	unsigned int trigger, i, pin;
 	struct irq_chip *chip;
-	int irq, retval;
+	int irq, ret;
 
 	switch (pdev->id) {
 	case GPIO_50PINS_PULLUPDOWN:
@@ -544,7 +544,11 @@ static int giu_probe(struct platform_device *pdev)
 
 	vr41xx_gpio_chip.dev = &pdev->dev;
 
-	retval = gpiochip_add(&vr41xx_gpio_chip);
+	ret = gpiochip_add(&vr41xx_gpio_chip);
+	if (!ret) {
+		iounmap(giu_base);
+		return -ENODEV;
+	}
 
 	giu_write(GIUINTENL, 0);
 	giu_write(GIUINTENH, 0);

drivers/gpio/gpio-vx855.c

@@ -288,8 +288,7 @@ static int vx855gpio_remove(struct platform_device *pdev)
 	struct vx855_gpio *vg = platform_get_drvdata(pdev);
 	struct resource *res;
 
-	if (gpiochip_remove(&vg->gpio))
-		dev_err(&pdev->dev, "unable to remove gpio_chip?\n");
+	gpiochip_remove(&vg->gpio);
 
 	if (vg->gpi_reserved) {
 		res = platform_get_resource(pdev, IORESOURCE_IO, 0);

drivers/gpio/gpio-wm831x.c

@@ -279,7 +279,8 @@ static int wm831x_gpio_remove(struct platform_device *pdev)
 {
 	struct wm831x_gpio *wm831x_gpio = platform_get_drvdata(pdev);
 
-	return  gpiochip_remove(&wm831x_gpio->gpio_chip);
+	gpiochip_remove(&wm831x_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver wm831x_gpio_driver = {

drivers/gpio/gpio-wm8350.c

@@ -145,7 +145,8 @@ static int wm8350_gpio_remove(struct platform_device *pdev)
 {
 	struct wm8350_gpio_data *wm8350_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&wm8350_gpio->gpio_chip);
+	gpiochip_remove(&wm8350_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver wm8350_gpio_driver = {

drivers/gpio/gpio-wm8994.c

@@ -285,7 +285,8 @@ static int wm8994_gpio_remove(struct platform_device *pdev)
 {
 	struct wm8994_gpio *wm8994_gpio = platform_get_drvdata(pdev);
 
-	return gpiochip_remove(&wm8994_gpio->gpio_chip);
+	gpiochip_remove(&wm8994_gpio->gpio_chip);
+	return 0;
 }
 
 static struct platform_driver wm8994_gpio_driver = {

drivers/gpio/gpiolib-acpi.c

@@ -157,7 +157,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
 
 	gpiod_direction_input(desc);
 
-	ret = gpiod_lock_as_irq(desc);
+	ret = gpio_lock_as_irq(chip, pin);
 	if (ret) {
 		dev_err(chip->dev, "Failed to lock GPIO as interrupt\n");
 		goto fail_free_desc;
@@ -212,7 +212,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
 fail_free_event:
 	kfree(event);
 fail_unlock_irq:
-	gpiod_unlock_as_irq(desc);
+	gpio_unlock_as_irq(chip, pin);
 fail_free_desc:
 	gpiochip_free_own_desc(desc);
 
@@ -221,7 +221,7 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
 
 /**
  * acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events
- * @acpi_gpio:      ACPI GPIO chip
+ * @chip:      GPIO chip
  *
  * ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are
  * handled by ACPI event methods which need to be called from the GPIO
@@ -229,11 +229,21 @@ static acpi_status acpi_gpiochip_request_interrupt(struct acpi_resource *ares,
  * gpio pins have acpi event methods and assigns interrupt handlers that calls
  * the acpi event methods for those pins.
  */
-static void acpi_gpiochip_request_interrupts(struct acpi_gpio_chip *acpi_gpio)
+void acpi_gpiochip_request_interrupts(struct gpio_chip *chip)
 {
-	struct gpio_chip *chip = acpi_gpio->chip;
+	struct acpi_gpio_chip *acpi_gpio;
+	acpi_handle handle;
+	acpi_status status;
+
+	if (!chip->dev || !chip->to_irq)
+		return;
 
-	if (!chip->to_irq)
+	handle = ACPI_HANDLE(chip->dev);
+	if (!handle)
+		return;
+
+	status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
+	if (ACPI_FAILURE(status))
 		return;
 
 	INIT_LIST_HEAD(&acpi_gpio->events);
@@ -243,17 +253,27 @@ static void acpi_gpiochip_request_interrupts(struct acpi_gpio_chip *acpi_gpio)
 
 /**
  * acpi_gpiochip_free_interrupts() - Free GPIO ACPI event interrupts.
- * @acpi_gpio:      ACPI GPIO chip
+ * @chip:      GPIO chip
  *
  * Free interrupts associated with GPIO ACPI event method for the given
  * GPIO chip.
  */
-static void acpi_gpiochip_free_interrupts(struct acpi_gpio_chip *acpi_gpio)
+void acpi_gpiochip_free_interrupts(struct gpio_chip *chip)
 {
+	struct acpi_gpio_chip *acpi_gpio;
 	struct acpi_gpio_event *event, *ep;
-	struct gpio_chip *chip = acpi_gpio->chip;
+	acpi_handle handle;
+	acpi_status status;
+
+	if (!chip->dev || !chip->to_irq)
+		return;
 
-	if (!chip->to_irq)
+	handle = ACPI_HANDLE(chip->dev);
+	if (!handle)
+		return;
+
+	status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio);
+	if (ACPI_FAILURE(status))
 		return;
 
 	list_for_each_entry_safe_reverse(event, ep, &acpi_gpio->events, node) {
@@ -263,7 +283,7 @@ static void acpi_gpiochip_free_interrupts(struct acpi_gpio_chip *acpi_gpio)
 		desc = gpiochip_get_desc(chip, event->pin);
 		if (WARN_ON(IS_ERR(desc)))
 			continue;
-		gpiod_unlock_as_irq(desc);
+		gpio_unlock_as_irq(chip, event->pin);
 		gpiochip_free_own_desc(desc);
 		list_del(&event->node);
 		kfree(event);
@@ -525,7 +545,6 @@ void acpi_gpiochip_add(struct gpio_chip *chip)
 		return;
 	}
 
-	acpi_gpiochip_request_interrupts(acpi_gpio);
 	acpi_gpiochip_request_regions(acpi_gpio);
 }
 
@@ -549,7 +568,6 @@ void acpi_gpiochip_remove(struct gpio_chip *chip)
 	}
 
 	acpi_gpiochip_free_regions(acpi_gpio);
-	acpi_gpiochip_free_interrupts(acpi_gpio);
 
 	acpi_detach_data(handle, acpi_gpio_chip_dh);
 	kfree(acpi_gpio);

drivers/gpio/gpiolib-legacy.c

+#include <linux/gpio/consumer.h>
+#include <linux/gpio/driver.h>
+
+#include <linux/gpio.h>
+
+#include "gpiolib.h"
+
+void gpio_free(unsigned gpio)
+{
+	gpiod_free(gpio_to_desc(gpio));
+}
+EXPORT_SYMBOL_GPL(gpio_free);
+
+/**
+ * gpio_request_one - request a single GPIO with initial configuration
+ * @gpio:	the GPIO number
+ * @flags:	GPIO configuration as specified by GPIOF_*
+ * @label:	a literal description string of this GPIO
+ */
+int gpio_request_one(unsigned gpio, unsigned long flags, const char *label)
+{
+	struct gpio_desc *desc;
+	int err;
+
+	desc = gpio_to_desc(gpio);
+
+	err = gpiod_request(desc, label);
+	if (err)
+		return err;
+
+	if (flags & GPIOF_OPEN_DRAIN)
+		set_bit(FLAG_OPEN_DRAIN, &desc->flags);
+
+	if (flags & GPIOF_OPEN_SOURCE)
+		set_bit(FLAG_OPEN_SOURCE, &desc->flags);
+
+	if (flags & GPIOF_ACTIVE_LOW)
+		set_bit(FLAG_ACTIVE_LOW, &desc->flags);
+
+	if (flags & GPIOF_DIR_IN)
+		err = gpiod_direction_input(desc);
+	else
+		err = gpiod_direction_output_raw(desc,
+				(flags & GPIOF_INIT_HIGH) ? 1 : 0);
+
+	if (err)
+		goto free_gpio;
+
+	if (flags & GPIOF_EXPORT) {
+		err = gpiod_export(desc, flags & GPIOF_EXPORT_CHANGEABLE);
+		if (err)
+			goto free_gpio;
+	}
+
+	return 0;
+
+ free_gpio:
+	gpiod_free(desc);
+	return err;
+}
+EXPORT_SYMBOL_GPL(gpio_request_one);
+
+int gpio_request(unsigned gpio, const char *label)
+{
+	return gpiod_request(gpio_to_desc(gpio), label);
+}
+EXPORT_SYMBOL_GPL(gpio_request);
+
+/**
+ * gpio_request_array - request multiple GPIOs in a single call
+ * @array:	array of the 'struct gpio'
+ * @num:	how many GPIOs in the array
+ */
+int gpio_request_array(const struct gpio *array, size_t num)
+{
+	int i, err;
+
+	for (i = 0; i < num; i++, array++) {
+		err = gpio_request_one(array->gpio, array->flags, array->label);
+		if (err)
+			goto err_free;
+	}
+	return 0;
+
+err_free:
+	while (i--)
+		gpio_free((--array)->gpio);
+	return err;
+}
+EXPORT_SYMBOL_GPL(gpio_request_array);
+
+/**
+ * gpio_free_array - release multiple GPIOs in a single call
+ * @array:	array of the 'struct gpio'
+ * @num:	how many GPIOs in the array
+ */
+void gpio_free_array(const struct gpio *array, size_t num)
+{
+	while (num--)
+		gpio_free((array++)->gpio);
+}
+EXPORT_SYMBOL_GPL(gpio_free_array);

drivers/gpio/gpiolib-of.c

@@ -23,7 +23,7 @@
 #include <linux/pinctrl/pinctrl.h>
 #include <linux/slab.h>
 
-struct gpio_desc;
+#include "gpiolib.h"
 
 /* Private data structure for of_gpiochip_find_and_xlate */
 struct gg_data {
@@ -82,19 +82,19 @@ struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np,
 	ret = of_parse_phandle_with_args(np, propname, "#gpio-cells", index,
 					 &gg_data.gpiospec);
 	if (ret) {
-		pr_debug("%s: can't parse gpios property of node '%s[%d]'\n",
-			__func__, np->full_name, index);
+		pr_debug("%s: can't parse '%s' property of node '%s[%d]'\n",
+			__func__, propname, np->full_name, index);
 		return ERR_PTR(ret);
 	}
 
 	gpiochip_find(&gg_data, of_gpiochip_find_and_xlate);
 
 	of_node_put(gg_data.gpiospec.np);
-	pr_debug("%s exited with status %d\n", __func__,
+	pr_debug("%s: parsed '%s' property of node '%s[%d]' - status (%d)\n",
+		 __func__, propname, np->full_name, index,
 		 PTR_ERR_OR_ZERO(gg_data.out_gpio));
 	return gg_data.out_gpio;
 }
-EXPORT_SYMBOL(of_get_named_gpiod_flags);
 
 int of_get_named_gpio_flags(struct device_node *np, const char *list_name,
 			    int index, enum of_gpio_flags *flags)

drivers/gpio/gpiolib.h

@@ -31,12 +31,21 @@ struct acpi_gpio_info {
 void acpi_gpiochip_add(struct gpio_chip *chip);
 void acpi_gpiochip_remove(struct gpio_chip *chip);
 
+void acpi_gpiochip_request_interrupts(struct gpio_chip *chip);
+void acpi_gpiochip_free_interrupts(struct gpio_chip *chip);
+
 struct gpio_desc *acpi_get_gpiod_by_index(struct device *dev, int index,
 					  struct acpi_gpio_info *info);
 #else
 static inline void acpi_gpiochip_add(struct gpio_chip *chip) { }
 static inline void acpi_gpiochip_remove(struct gpio_chip *chip) { }
 
+static inline void
+acpi_gpiochip_request_interrupts(struct gpio_chip *chip) { }
+
+static inline void
+acpi_gpiochip_free_interrupts(struct gpio_chip *chip) { }
+
 static inline struct gpio_desc *
 acpi_get_gpiod_by_index(struct device *dev, int index,
 			struct acpi_gpio_info *info)
@@ -45,10 +54,100 @@ acpi_get_gpiod_by_index(struct device *dev, int index,
 }
 #endif
 
-int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label);
-void gpiochip_free_own_desc(struct gpio_desc *desc);
-
 struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np,
 		   const char *list_name, int index, enum of_gpio_flags *flags);
 
+struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip, u16 hwnum);
+
+extern struct spinlock gpio_lock;
+extern struct list_head gpio_chips;
+
+struct gpio_desc {
+	struct gpio_chip	*chip;
+	unsigned long		flags;
+/* flag symbols are bit numbers */
+#define FLAG_REQUESTED	0
+#define FLAG_IS_OUT	1
+#define FLAG_EXPORT	2	/* protected by sysfs_lock */
+#define FLAG_SYSFS	3	/* exported via /sys/class/gpio/control */
+#define FLAG_TRIG_FALL	4	/* trigger on falling edge */
+#define FLAG_TRIG_RISE	5	/* trigger on rising edge */
+#define FLAG_ACTIVE_LOW	6	/* value has active low */
+#define FLAG_OPEN_DRAIN	7	/* Gpio is open drain type */
+#define FLAG_OPEN_SOURCE 8	/* Gpio is open source type */
+#define FLAG_USED_AS_IRQ 9	/* GPIO is connected to an IRQ */
+
+#define ID_SHIFT	16	/* add new flags before this one */
+
+#define GPIO_FLAGS_MASK		((1 << ID_SHIFT) - 1)
+#define GPIO_TRIGGER_MASK	(BIT(FLAG_TRIG_FALL) | BIT(FLAG_TRIG_RISE))
+
+	const char		*label;
+};
+
+int gpiod_request(struct gpio_desc *desc, const char *label);
+void gpiod_free(struct gpio_desc *desc);
+
+/*
+ * Return the GPIO number of the passed descriptor relative to its chip
+ */
+static int __maybe_unused gpio_chip_hwgpio(const struct gpio_desc *desc)
+{
+	return desc - &desc->chip->desc[0];
+}
+
+/* With descriptor prefix */
+
+#define gpiod_emerg(desc, fmt, ...)					       \
+	pr_emerg("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
+		 ##__VA_ARGS__)
+#define gpiod_crit(desc, fmt, ...)					       \
+	pr_crit("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
+		 ##__VA_ARGS__)
+#define gpiod_err(desc, fmt, ...)					       \
+	pr_err("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",  \
+		 ##__VA_ARGS__)
+#define gpiod_warn(desc, fmt, ...)					       \
+	pr_warn("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
+		 ##__VA_ARGS__)
+#define gpiod_info(desc, fmt, ...)					       \
+	pr_info("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?", \
+		 ##__VA_ARGS__)
+#define gpiod_dbg(desc, fmt, ...)					       \
+	pr_debug("gpio-%d (%s): " fmt, desc_to_gpio(desc), desc->label ? : "?",\
+		 ##__VA_ARGS__)
+
+/* With chip prefix */
+
+#define chip_emerg(chip, fmt, ...)					\
+	pr_emerg("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_crit(chip, fmt, ...)					\
+	pr_crit("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_err(chip, fmt, ...)					\
+	pr_err("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_warn(chip, fmt, ...)					\
+	pr_warn("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_info(chip, fmt, ...)					\
+	pr_info("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+#define chip_dbg(chip, fmt, ...)					\
+	pr_debug("GPIO chip %s: " fmt, chip->label, ##__VA_ARGS__)
+
+#ifdef CONFIG_GPIO_SYSFS
+
+int gpiochip_export(struct gpio_chip *chip);
+void gpiochip_unexport(struct gpio_chip *chip);
+
+#else
+
+static inline int gpiochip_export(struct gpio_chip *chip)
+{
+	return 0;
+}
+
+static inline void gpiochip_unexport(struct gpio_chip *chip)
+{
+}
+
+#endif /* CONFIG_GPIO_SYSFS */
+
 #endif /* GPIOLIB_H */

include/asm-generic/gpio.h

@@ -110,9 +110,6 @@ static inline int __gpio_to_irq(unsigned gpio)
 	return gpiod_to_irq(gpio_to_desc(gpio));
 }
 
-extern int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset);
-extern void gpio_unlock_as_irq(struct gpio_chip *chip, unsigned int offset);
-
 extern int gpio_request_one(unsigned gpio, unsigned long flags, const char *label);
 extern int gpio_request_array(const struct gpio *array, size_t num);
 extern void gpio_free_array(const struct gpio *array, size_t num);

include/linux/gpio/consumer.h

@@ -18,30 +18,79 @@ struct gpio_desc;
 
 #ifdef CONFIG_GPIOLIB
 
+#define GPIOD_FLAGS_BIT_DIR_SET		BIT(0)
+#define GPIOD_FLAGS_BIT_DIR_OUT		BIT(1)
+#define GPIOD_FLAGS_BIT_DIR_VAL		BIT(2)
+
+/**
+ * Optional flags that can be passed to one of gpiod_* to configure direction
+ * and output value. These values cannot be OR'd.
+ */
+enum gpiod_flags {
+	GPIOD_ASIS	= 0,
+	GPIOD_IN	= GPIOD_FLAGS_BIT_DIR_SET,
+	GPIOD_OUT_LOW	= GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT,
+	GPIOD_OUT_HIGH	= GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT |
+			  GPIOD_FLAGS_BIT_DIR_VAL,
+};
+
 /* Acquire and dispose GPIOs */
-struct gpio_desc *__must_check gpiod_get(struct device *dev,
-					 const char *con_id);
-struct gpio_desc *__must_check gpiod_get_index(struct device *dev,
+struct gpio_desc *__must_check __gpiod_get(struct device *dev,
+					 const char *con_id,
+					 enum gpiod_flags flags);
+#define __gpiod_get(dev, con_id, flags, ...) __gpiod_get(dev, con_id, flags)
+#define gpiod_get(varargs...) __gpiod_get(varargs, 0)
+struct gpio_desc *__must_check __gpiod_get_index(struct device *dev,
 					       const char *con_id,
-					       unsigned int idx);
-struct gpio_desc *__must_check gpiod_get_optional(struct device *dev,
-						  const char *con_id);
-struct gpio_desc *__must_check gpiod_get_index_optional(struct device *dev,
+					       unsigned int idx,
+					       enum gpiod_flags flags);
+#define __gpiod_get_index(dev, con_id, index, flags, ...)		\
+	__gpiod_get_index(dev, con_id, index, flags)
+#define gpiod_get_index(varargs...) __gpiod_get_index(varargs, 0)
+struct gpio_desc *__must_check __gpiod_get_optional(struct device *dev,
 						  const char *con_id,
-							unsigned int index);
+						  enum gpiod_flags flags);
+#define __gpiod_get_optional(dev, con_id, flags, ...)			\
+	__gpiod_get_optional(dev, con_id, flags)
+#define gpiod_get_optional(varargs...) __gpiod_get_optional(varargs, 0)
+struct gpio_desc *__must_check __gpiod_get_index_optional(struct device *dev,
+							const char *con_id,
+							unsigned int index,
+							enum gpiod_flags flags);
+#define __gpiod_get_index_optional(dev, con_id, index, flags, ...)	\
+	__gpiod_get_index_optional(dev, con_id, index, flags)
+#define gpiod_get_index_optional(varargs...)				\
+	__gpiod_get_index_optional(varargs, 0)
 
 void gpiod_put(struct gpio_desc *desc);
 
-struct gpio_desc *__must_check devm_gpiod_get(struct device *dev,
-					      const char *con_id);
-struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev,
+struct gpio_desc *__must_check __devm_gpiod_get(struct device *dev,
+					      const char *con_id,
+					      enum gpiod_flags flags);
+#define __devm_gpiod_get(dev, con_id, flags, ...)			\
+	__devm_gpiod_get(dev, con_id, flags)
+#define devm_gpiod_get(varargs...) __devm_gpiod_get(varargs, 0)
+struct gpio_desc *__must_check __devm_gpiod_get_index(struct device *dev,
 						    const char *con_id,
-						    unsigned int idx);
-struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev,
-						       const char *con_id);
+						    unsigned int idx,
+						    enum gpiod_flags flags);
+#define __devm_gpiod_get_index(dev, con_id, index, flags, ...)		\
+	__devm_gpiod_get_index(dev, con_id, index, flags)
+#define devm_gpiod_get_index(varargs...) __devm_gpiod_get_index(varargs, 0)
+struct gpio_desc *__must_check __devm_gpiod_get_optional(struct device *dev,
+						       const char *con_id,
+						       enum gpiod_flags flags);
+#define __devm_gpiod_get_optional(dev, con_id, flags, ...)		\
+	__devm_gpiod_get_optional(dev, con_id, flags)
+#define devm_gpiod_get_optional(varargs...)				\
+	__devm_gpiod_get_optional(varargs, 0)
 struct gpio_desc *__must_check
-devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
-			      unsigned int index);
+__devm_gpiod_get_index_optional(struct device *dev, const char *con_id,
+			      unsigned int index, enum gpiod_flags flags);
+#define __devm_gpiod_get_index_optional(dev, con_id, index, flags, ...)	\
+	__devm_gpiod_get_index_optional(dev, con_id, index, flags)
+#define devm_gpiod_get_index_optional(varargs...)			\
+	__devm_gpiod_get_index_optional(varargs, 0)
 
 void devm_gpiod_put(struct device *dev, struct gpio_desc *desc);
 

include/linux/gpio/driver.h

@@ -141,73 +141,16 @@ extern const char *gpiochip_is_requested(struct gpio_chip *chip,
 
 /* add/remove chips */
 extern int gpiochip_add(struct gpio_chip *chip);
-extern int __must_check gpiochip_remove(struct gpio_chip *chip);
+extern int gpiochip_remove(struct gpio_chip *chip);
 extern struct gpio_chip *gpiochip_find(void *data,
 			      int (*match)(struct gpio_chip *chip, void *data));
 
 /* lock/unlock as IRQ */
-int gpiod_lock_as_irq(struct gpio_desc *desc);
-void gpiod_unlock_as_irq(struct gpio_desc *desc);
+int gpio_lock_as_irq(struct gpio_chip *chip, unsigned int offset);
+void gpio_unlock_as_irq(struct gpio_chip *chip, unsigned int offset);
 
 struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc);
 
-struct gpio_desc *gpiochip_get_desc(struct gpio_chip *chip,
-				    u16 hwnum);
-
-enum gpio_lookup_flags {
-	GPIO_ACTIVE_HIGH = (0 << 0),
-	GPIO_ACTIVE_LOW = (1 << 0),
-	GPIO_OPEN_DRAIN = (1 << 1),
-	GPIO_OPEN_SOURCE = (1 << 2),
-};
-
-/**
- * struct gpiod_lookup - lookup table
- * @chip_label: name of the chip the GPIO belongs to
- * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO
- * @con_id: name of the GPIO from the device's point of view
- * @idx: index of the GPIO in case several GPIOs share the same name
- * @flags: mask of GPIO_* values
- *
- * gpiod_lookup is a lookup table for associating GPIOs to specific devices and
- * functions using platform data.
- */
-struct gpiod_lookup {
-	const char *chip_label;
-	u16 chip_hwnum;
-	const char *con_id;
-	unsigned int idx;
-	enum gpio_lookup_flags flags;
-};
-
-struct gpiod_lookup_table {
-	struct list_head list;
-	const char *dev_id;
-	struct gpiod_lookup table[];
-};
-
-/*
- * Simple definition of a single GPIO under a con_id
- */
-#define GPIO_LOOKUP(_chip_label, _chip_hwnum, _con_id, _flags) \
-	GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, 0, _flags)
-
-/*
- * Use this macro if you need to have several GPIOs under the same con_id.
- * Each GPIO needs to use a different index and can be accessed using
- * gpiod_get_index()
- */
-#define GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, _idx, _flags)  \
-{                                                                         \
-	.chip_label = _chip_label,                                        \
-	.chip_hwnum = _chip_hwnum,                                        \
-	.con_id = _con_id,                                                \
-	.idx = _idx,                                                      \
-	.flags = _flags,                                                  \
-}
-
-void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
-
 #ifdef CONFIG_GPIOLIB_IRQCHIP
 
 void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip,
@@ -223,6 +166,9 @@ int gpiochip_irqchip_add(struct gpio_chip *gpiochip,
 
 #endif /* CONFIG_GPIO_IRQCHIP */
 
+int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label);
+void gpiochip_free_own_desc(struct gpio_desc *desc);
+
 #else /* CONFIG_GPIOLIB */
 
 static inline struct gpio_chip *gpiod_to_chip(const struct gpio_desc *desc)

include/linux/gpio/machine.h

+#ifndef __LINUX_GPIO_MACHINE_H
+#define __LINUX_GPIO_MACHINE_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+
+enum gpio_lookup_flags {
+	GPIO_ACTIVE_HIGH = (0 << 0),
+	GPIO_ACTIVE_LOW = (1 << 0),
+	GPIO_OPEN_DRAIN = (1 << 1),
+	GPIO_OPEN_SOURCE = (1 << 2),
+};
+
+/**
+ * struct gpiod_lookup - lookup table
+ * @chip_label: name of the chip the GPIO belongs to
+ * @chip_hwnum: hardware number (i.e. relative to the chip) of the GPIO
+ * @con_id: name of the GPIO from the device's point of view
+ * @idx: index of the GPIO in case several GPIOs share the same name
+ * @flags: mask of GPIO_* values
+ *
+ * gpiod_lookup is a lookup table for associating GPIOs to specific devices and
+ * functions using platform data.
+ */
+struct gpiod_lookup {
+	const char *chip_label;
+	u16 chip_hwnum;
+	const char *con_id;
+	unsigned int idx;
+	enum gpio_lookup_flags flags;
+};
+
+struct gpiod_lookup_table {
+	struct list_head list;
+	const char *dev_id;
+	struct gpiod_lookup table[];
+};
+
+/*
+ * Simple definition of a single GPIO under a con_id
+ */
+#define GPIO_LOOKUP(_chip_label, _chip_hwnum, _con_id, _flags) \
+	GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, 0, _flags)
+
+/*
+ * Use this macro if you need to have several GPIOs under the same con_id.
+ * Each GPIO needs to use a different index and can be accessed using
+ * gpiod_get_index()
+ */
+#define GPIO_LOOKUP_IDX(_chip_label, _chip_hwnum, _con_id, _idx, _flags)  \
+{                                                                         \
+	.chip_label = _chip_label,                                        \
+	.chip_hwnum = _chip_hwnum,                                        \
+	.con_id = _con_id,                                                \
+	.idx = _idx,                                                      \
+	.flags = _flags,                                                  \
+}
+
+void gpiod_add_lookup_table(struct gpiod_lookup_table *table);
+
+#endif /* __LINUX_GPIO_MACHINE_H */