Merge tag 'gpio-v5.5-1' 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 v5.5 kernel cycle

  Core changes:

   - Expose pull up/down flags for the GPIO character device to
     userspace.

     After clear input from the RaspberryPi and Beagle communities, it
     has been established that prototyping, industrial automation and
     make communities strongly need this feature, and as we want people
     to use the character device, we have implemented the simple pull
     up/down interface for GPIO lines.

     This means we can specify that a (chip-specific) pull up/down
     resistor can be enabled, but does not offer fine-grained control
     such as cases where the resistance of the same pull resistor can be
     controlled (yet).

   - Introduce devm_fwnode_gpiod_get_index() and start to phase out the
     old symbol devm_fwnode_get_index_gpiod_from_child().

   - A bit of documentation clean-up work.

   - Introduce a define for GPIO line directions and deploy it in all
     GPIO drivers in the drivers/gpio directory.

   - Add a special callback to populate pin ranges when cooperating with
     the pin control subsystem and registering ranges as part of adding
     a gpiolib driver and a gpio_irq_chip driver at the same time. This
     is also deployed in the Intel Merrifield driver.

  New drivers:

   - RDA Micro GPIO controller.

   - XGS-iproc GPIO driver.

  Driver improvements:

   - Wake event and debounce support on the Tegra 186 driver.

   - Finalize the Aspeed SGPIO driver.

   - MPC8xxx uses a normal IRQ handler rather than a chained handler"

* tag 'gpio-v5.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (64 commits)
  gpio: Add TODO item for regmap helper
  Documentation: gpio: driver.rst: Fix warnings
  gpio: of: Fix bogus reference to gpiod_get_count()
  gpiolib: Grammar s/manager/managed/
  gpio: lynxpoint: Setup correct IRQ handlers
  MAINTAINERS: Replace my email by one @kernel.org
  gpiolib: acpi: Make acpi_gpiochip_alloc_event always return AE_OK
  gpio/mpc8xxx: fix qoriq GPIO reading
  gpio: mpc8xxx: Don't overwrite default irq_set_type callback
  gpiolib: acpi: Print pin number on acpi_gpiochip_alloc_event errors
  gpiolib: fix coding style in gpiod_hog()
  drm/bridge: ti-tfp410: switch to using fwnode_gpiod_get_index()
  gpio: merrifield: Pass irqchip when adding gpiochip
  gpio: merrifield: Add GPIO <-> pin mapping ranges via callback
  gpiolib: Introduce ->add_pin_ranges() callback
  gpio: mmio: remove untrue leftover comment
  gpio: em: Use platform_get_irq() to obtain interrupts
  gpio: tegra186: Add debounce support
  gpio: tegra186: Program interrupt route mapping
  gpio: tegra186: Derive register offsets from bank/port
  ...

76 files changed, 1664 insertions, 566 deletions

diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig
index 92d0ff63b3ea..8adffd42f8cb 100644
--- a/drivers/gpio/Kconfig
+++ b/drivers/gpio/Kconfig
@@ -120,6 +120,14 @@ config GPIO_ASPEED
 	help
 	  Say Y here to support Aspeed AST2400 and AST2500 GPIO controllers.
 
+config GPIO_ASPEED_SGPIO
+	bool "Aspeed SGPIO support"
+	depends on (ARCH_ASPEED || COMPILE_TEST) && OF_GPIO
+	select GPIO_GENERIC
+	select GPIOLIB_IRQCHIP
+	help
+	  Say Y here to support Aspeed AST2500 SGPIO functionality.
+
 config GPIO_ATH79
 	tristate "Atheros AR71XX/AR724X/AR913X GPIO support"
 	default y if ATH79
@@ -147,6 +155,15 @@ config GPIO_BCM_KONA
 	help
 	  Turn on GPIO support for Broadcom "Kona" chips.
 
+config GPIO_BCM_XGS_IPROC
+	tristate "BRCM XGS iProc GPIO support"
+	depends on OF_GPIO && (ARCH_BCM_IPROC || COMPILE_TEST)
+	select GPIO_GENERIC
+	select GPIOLIB_IRQCHIP
+	default ARCH_BCM_IPROC
+	help
+	  Say yes here to enable GPIO support for Broadcom XGS iProc SoCs.
+
 config GPIO_BRCMSTB
 	tristate "BRCMSTB GPIO support"
 	default y if (ARCH_BRCMSTB || BMIPS_GENERIC)
@@ -435,6 +452,15 @@ config GPIO_RCAR
 	help
 	  Say yes here to support GPIO on Renesas R-Car SoCs.
 
+config GPIO_RDA
+	bool "RDA Micro GPIO controller support"
+	depends on ARCH_RDA || COMPILE_TEST
+	depends on OF_GPIO
+	select GPIO_GENERIC
+	select GPIOLIB_IRQCHIP
+	help
+	  Say Y here to support RDA Micro GPIO controller.
+
 config GPIO_REG
 	bool
 	help
@@ -531,6 +557,7 @@ config GPIO_TEGRA186
 	depends on ARCH_TEGRA_186_SOC || COMPILE_TEST
 	depends on OF_GPIO
 	select GPIOLIB_IRQCHIP
+	select IRQ_DOMAIN_HIERARCHY
 	help
 	  Say yes here to support GPIO pins on NVIDIA Tegra186 SoCs.
 
@@ -1320,7 +1347,7 @@ config GPIO_BT8XX
 	  The card needs to be physically altered for using it as a
 	  GPIO card. For more information on how to build a GPIO card
 	  from a BT8xx TV card, see the documentation file at
-	  Documentation/driver-api/bt8xxgpio.rst
+	  Documentation/driver-api/gpio/bt8xxgpio.rst
 
 	  If unsure, say N.
 
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index d2fd19c15bae..34eb8b2b12dd 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -32,8 +32,10 @@ obj-$(CONFIG_GPIO_AMD_FCH)		+= gpio-amd-fch.o
 obj-$(CONFIG_GPIO_AMDPT)		+= gpio-amdpt.o
 obj-$(CONFIG_GPIO_ARIZONA)		+= gpio-arizona.o
 obj-$(CONFIG_GPIO_ASPEED)		+= gpio-aspeed.o
+obj-$(CONFIG_GPIO_ASPEED_SGPIO)		+= gpio-aspeed-sgpio.o
 obj-$(CONFIG_GPIO_ATH79)		+= gpio-ath79.o
 obj-$(CONFIG_GPIO_BCM_KONA)		+= gpio-bcm-kona.o
+obj-$(CONFIG_GPIO_BCM_XGS_IPROC)	+= gpio-xgs-iproc.o
 obj-$(CONFIG_GPIO_BD70528)		+= gpio-bd70528.o
 obj-$(CONFIG_GPIO_BD9571MWV)		+= gpio-bd9571mwv.o
 obj-$(CONFIG_GPIO_BRCMSTB)		+= gpio-brcmstb.o
@@ -115,6 +117,7 @@ obj-$(CONFIG_GPIO_PXA)			+= gpio-pxa.o
 obj-$(CONFIG_GPIO_RASPBERRYPI_EXP)	+= gpio-raspberrypi-exp.o
 obj-$(CONFIG_GPIO_RC5T583)		+= gpio-rc5t583.o
 obj-$(CONFIG_GPIO_RCAR)			+= gpio-rcar.o
+obj-$(CONFIG_GPIO_RDA)			+= gpio-rda.o
 obj-$(CONFIG_GPIO_RDC321X)		+= gpio-rdc321x.o
 obj-$(CONFIG_GPIO_REG)			+= gpio-reg.o
 obj-$(CONFIG_ARCH_SA1100)		+= gpio-sa1100.o
diff --git a/drivers/gpio/TODO b/drivers/gpio/TODO
index 9c048f10c9ad..76f8c7ff18ff 100644
--- a/drivers/gpio/TODO
+++ b/drivers/gpio/TODO
@@ -80,6 +80,10 @@ Work items:
 - Look over and identify any remaining easily converted drivers and
   dry-code conversions to MMIO GPIO for maintainers to test
 
+- Expand the MMIO GPIO or write a new library for regmap-based I/O
+  helpers for GPIO drivers on regmap that simply use offsets
+  0..n in some register to drive GPIO lines
+
 - Expand the MMIO GPIO or write a new library for port-mapped I/O
   helpers (x86 inb()/outb()) and convert port-mapped I/O drivers to use
   this with dry-coding and sending to maintainers to test
diff --git a/drivers/gpio/gpio-104-dio-48e.c b/drivers/gpio/gpio-104-dio-48e.c
index a44fa8af5b0d..400c09b905f8 100644
--- a/drivers/gpio/gpio-104-dio-48e.c
+++ b/drivers/gpio/gpio-104-dio-48e.c
@@ -59,7 +59,10 @@ static int dio48e_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
 	const unsigned port = offset / 8;
 	const unsigned mask = BIT(offset % 8);
 
-	return !!(dio48egpio->io_state[port] & mask);
+	if (dio48egpio->io_state[port] & mask)
+		return  GPIO_LINE_DIRECTION_IN;
+
+	return GPIO_LINE_DIRECTION_OUT;
 }
 
 static int dio48e_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
diff --git a/drivers/gpio/gpio-104-idi-48.c b/drivers/gpio/gpio-104-idi-48.c
index ff53887bdaa8..c50329ab493a 100644
--- a/drivers/gpio/gpio-104-idi-48.c
+++ b/drivers/gpio/gpio-104-idi-48.c
@@ -53,7 +53,7 @@ struct idi_48_gpio {
 
 static int idi_48_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
 {
-	return 1;
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int idi_48_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
@@ -65,7 +65,7 @@ static int idi_48_gpio_get(struct gpio_chip *chip, unsigned offset)
 {
 	struct idi_48_gpio *const idi48gpio = gpiochip_get_data(chip);
 	unsigned i;
-	const unsigned register_offset[6] = { 0, 1, 2, 4, 5, 6 };
+	static const unsigned int register_offset[6] = { 0, 1, 2, 4, 5, 6 };
 	unsigned base_offset;
 	unsigned mask;
 
diff --git a/drivers/gpio/gpio-104-idio-16.c b/drivers/gpio/gpio-104-idio-16.c
index 8d2f51cd9d91..5752d9dab148 100644
--- a/drivers/gpio/gpio-104-idio-16.c
+++ b/drivers/gpio/gpio-104-idio-16.c
@@ -51,9 +51,9 @@ struct idio_16_gpio {
 static int idio_16_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
 {
 	if (offset > 15)
-		return 1;
+		return GPIO_LINE_DIRECTION_IN;
 
-	return 0;
+	return GPIO_LINE_DIRECTION_OUT;
 }
 
 static int idio_16_gpio_direction_input(struct gpio_chip *chip, unsigned offset)
diff --git a/drivers/gpio/gpio-74xx-mmio.c b/drivers/gpio/gpio-74xx-mmio.c
index 83a2286d93f6..173e06758e6c 100644
--- a/drivers/gpio/gpio-74xx-mmio.c
+++ b/drivers/gpio/gpio-74xx-mmio.c
@@ -77,7 +77,10 @@ static int mmio_74xx_get_direction(struct gpio_chip *gc, unsigned offset)
 {
 	struct mmio_74xx_gpio_priv *priv = gpiochip_get_data(gc);
 
-	return !(priv->flags & MMIO_74XX_DIR_OUT);
+	if (priv->flags & MMIO_74XX_DIR_OUT)
+		return GPIO_LINE_DIRECTION_OUT;
+
+	return  GPIO_LINE_DIRECTION_IN;
 }
 
 static int mmio_74xx_dir_in(struct gpio_chip *gc, unsigned int gpio)
diff --git a/drivers/gpio/gpio-amd-fch.c b/drivers/gpio/gpio-amd-fch.c
index 181df1581df5..4e44ba4d7423 100644
--- a/drivers/gpio/gpio-amd-fch.c
+++ b/drivers/gpio/gpio-amd-fch.c
@@ -92,7 +92,7 @@ static int amd_fch_gpio_get_direction(struct gpio_chip *gc, unsigned int gpio)
 	ret = (readl_relaxed(ptr) & AMD_FCH_GPIO_FLAG_DIRECTION);
 	spin_unlock_irqrestore(&priv->lock, flags);
 
-	return ret;
+	return ret ? GPIO_LINE_DIRECTION_IN : GPIO_LINE_DIRECTION_OUT;
 }
 
 static void amd_fch_gpio_set(struct gpio_chip *gc,
diff --git a/drivers/gpio/sgpio-aspeed.c b/drivers/gpio/gpio-aspeed-sgpio.c
index 7e99860ca447..7e99860ca447 100644
--- a/drivers/gpio/sgpio-aspeed.c
+++ b/drivers/gpio/gpio-aspeed-sgpio.c
diff --git a/drivers/gpio/gpio-aspeed.c b/drivers/gpio/gpio-aspeed.c
index 09e53c5f3b0a..f1037b61f763 100644
--- a/drivers/gpio/gpio-aspeed.c
+++ b/drivers/gpio/gpio-aspeed.c
@@ -487,10 +487,10 @@ static int aspeed_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
 	u32 val;
 
 	if (!have_input(gpio, offset))
-		return 0;
+		return GPIO_LINE_DIRECTION_OUT;
 
 	if (!have_output(gpio, offset))
-		return 1;
+		return GPIO_LINE_DIRECTION_IN;
 
 	spin_lock_irqsave(&gpio->lock, flags);
 
@@ -498,8 +498,7 @@ static int aspeed_gpio_get_direction(struct gpio_chip *gc, unsigned int offset)
 
 	spin_unlock_irqrestore(&gpio->lock, flags);
 
-	return !val;
-
+	return val ? GPIO_LINE_DIRECTION_OUT : GPIO_LINE_DIRECTION_IN;
 }
 
 static inline int irqd_to_aspeed_gpio_data(struct irq_data *d,
diff --git a/drivers/gpio/gpio-ath79.c b/drivers/gpio/gpio-ath79.c
index f1a5ea9b3de2..53fae02c40ad 100644
--- a/drivers/gpio/gpio-ath79.c
+++ b/drivers/gpio/gpio-ath79.c
@@ -226,7 +226,6 @@ static int ath79_gpio_probe(struct platform_device *pdev)
 	struct device_node *np = dev->of_node;
 	struct ath79_gpio_ctrl *ctrl;
 	struct gpio_irq_chip *girq;
-	struct resource *res;
 	u32 ath79_gpio_count;
 	bool oe_inverted;
 	int err;
@@ -256,12 +255,9 @@ static int ath79_gpio_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res)
-		return -EINVAL;
-	ctrl->base = devm_ioremap_nocache(dev, res->start, resource_size(res));
-	if (!ctrl->base)
-		return -ENOMEM;
+	ctrl->base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(ctrl->base))
+		return PTR_ERR(ctrl->base);
 
 	raw_spin_lock_init(&ctrl->lock);
 	err = bgpio_init(&ctrl->gc, dev, 4,
diff --git a/drivers/gpio/gpio-bcm-kona.c b/drivers/gpio/gpio-bcm-kona.c
index 9fa6d3a967d2..4122683eb1f9 100644
--- a/drivers/gpio/gpio-bcm-kona.c
+++ b/drivers/gpio/gpio-bcm-kona.c
@@ -127,7 +127,7 @@ static int bcm_kona_gpio_get_dir(struct gpio_chip *chip, unsigned gpio)
 	u32 val;
 
 	val = readl(reg_base + GPIO_CONTROL(gpio)) & GPIO_GPCTR0_IOTR_MASK;
-	return !!val;
+	return val ? GPIO_LINE_DIRECTION_IN : GPIO_LINE_DIRECTION_OUT;
 }
 
 static void bcm_kona_gpio_set(struct gpio_chip *chip, unsigned gpio, int value)
@@ -144,7 +144,7 @@ static void bcm_kona_gpio_set(struct gpio_chip *chip, unsigned gpio, int value)
 	raw_spin_lock_irqsave(&kona_gpio->lock, flags);
 
 	/* this function only applies to output pin */
-	if (bcm_kona_gpio_get_dir(chip, gpio) == 1)
+	if (bcm_kona_gpio_get_dir(chip, gpio) == GPIO_LINE_DIRECTION_IN)
 		goto out;
 
 	reg_offset = value ? GPIO_OUT_SET(bank_id) : GPIO_OUT_CLEAR(bank_id);
@@ -170,7 +170,7 @@ static int bcm_kona_gpio_get(struct gpio_chip *chip, unsigned gpio)
 	reg_base = kona_gpio->reg_base;
 	raw_spin_lock_irqsave(&kona_gpio->lock, flags);
 
-	if (bcm_kona_gpio_get_dir(chip, gpio) == 1)
+	if (bcm_kona_gpio_get_dir(chip, gpio) == GPIO_LINE_DIRECTION_IN)
 		reg_offset = GPIO_IN_STATUS(bank_id);
 	else
 		reg_offset = GPIO_OUT_STATUS(bank_id);
diff --git a/drivers/gpio/gpio-bd70528.c b/drivers/gpio/gpio-bd70528.c
index 4ba4d4a67881..45b3da8da336 100644
--- a/drivers/gpio/gpio-bd70528.c
+++ b/drivers/gpio/gpio-bd70528.c
@@ -54,8 +54,10 @@ static int bd70528_get_direction(struct gpio_chip *chip, unsigned int offset)
 		dev_err(bdgpio->chip.dev, "Could not read gpio direction\n");
 		return ret;
 	}
+	if (val & BD70528_GPIO_OUT_EN_MASK)
+		return GPIO_LINE_DIRECTION_OUT;
 
-	return !(val & BD70528_GPIO_OUT_EN_MASK);
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int bd70528_gpio_set_config(struct gpio_chip *chip, unsigned int offset,
@@ -166,9 +168,9 @@ static int bd70528_gpio_get(struct gpio_chip *chip, unsigned int offset)
 	 * locking would make no sense.
 	 */
 	ret = bd70528_get_direction(chip, offset);
-	if (ret == 0)
+	if (ret == GPIO_LINE_DIRECTION_OUT)
 		ret = bd70528_gpio_get_o(bdgpio, offset);
-	else if (ret == 1)
+	else if (ret == GPIO_LINE_DIRECTION_IN)
 		ret = bd70528_gpio_get_i(bdgpio, offset);
 	else
 		dev_err(bdgpio->chip.dev, "failed to read GPIO direction\n");
@@ -230,3 +232,4 @@ module_platform_driver(bd70528_gpio);
 MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
 MODULE_DESCRIPTION("BD70528 voltage regulator driver");
 MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:bd70528-gpio");
diff --git a/drivers/gpio/gpio-bd9571mwv.c b/drivers/gpio/gpio-bd9571mwv.c
index 5224a946e8ab..c0abc9c6851b 100644
--- a/drivers/gpio/gpio-bd9571mwv.c
+++ b/drivers/gpio/gpio-bd9571mwv.c
@@ -37,8 +37,10 @@ static int bd9571mwv_gpio_get_direction(struct gpio_chip *chip,
 	ret = regmap_read(gpio->bd->regmap, BD9571MWV_GPIO_DIR, &val);
 	if (ret < 0)
 		return ret;
+	if (val & BIT(offset))
+		return GPIO_LINE_DIRECTION_IN;
 
-	return val & BIT(offset);
+	return GPIO_LINE_DIRECTION_OUT;
 }
 
 static int bd9571mwv_gpio_direction_input(struct gpio_chip *chip,
diff --git a/drivers/gpio/gpio-dln2.c b/drivers/gpio/gpio-dln2.c
index 8a33c2fc174d..26b40c8b8a12 100644
--- a/drivers/gpio/gpio-dln2.c
+++ b/drivers/gpio/gpio-dln2.c
@@ -200,9 +200,9 @@ static int dln2_gpio_get_direction(struct gpio_chip *chip, unsigned offset)
 	struct dln2_gpio *dln2 = gpiochip_get_data(chip);
 
 	if (test_bit(offset, dln2->output_enabled))
-		return 0;
+		return GPIO_LINE_DIRECTION_OUT;
 
-	return 1;
+	return GPIO_LINE_DIRECTION_IN;
 }
 
 static int dln2_gpio_get(struct gpio_chip *chip, unsigned int offset)
@@ -214,7 +214,7 @@ static int dln2_gpio_get(struct gpio_chip *chip, unsigned int offset)
 	if (dir < 0)
 		return dir;
 
-	if (dir == 1)
+	if (dir == GPIO_LINE_DIRECTION_IN)
 		return dln2_gpio_pin_get_in_val(dln2, offset);
 
 	return dln2_gpio_pin_get_out_val(dln2, offset);
diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c
index 620f25b7efb4..17a243c528ad 100644
--- a/drivers/gpio/gpio-em.c
+++ b/