Merge tag 'gpio-updates-for-v6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux

Pull gpio updates from Bartosz Golaszewski:
 "Three new drivers, support for some new models in existing ones and
  lots of various tweaks and improvements across the board (switching to
  using recommended APIs, code shrink and simplification, etc.).

  Also a new feature in the character device uAPI where we now notify
  the user-space about changes triggered by in-kernel users as well, not
  only when they were done by other user-space agents.

  Summary:

  GPIOLIB core:
   - use the new mem_is_zero() instead of memchr_inv(s, 0, n)
   - don't store debounce period twice needlessly
   - clean-up debugfs handling
   - remove leftover comments referring to no longer used spinlocks
   - unduplicate some operations like SRCU locks and initializing GPIO
     descriptors
   - constify the sysfs class struct
   - use lock guards in GPIO sysfs code
   - update GPIO uAPI internal flags all at once atomically for
     consistency with other places
   - modify the behavior of the sysfs interface by no longer exporting
     lines that are named inside the driver code or board files with the
     sysfs links bearing the line names as this has for many years been
     largely unused due to the prevalence of DT, ACPI and firmware nodes
     over board files and made the API inconsistent
   - for GPIO interrupt providers: free irqs that are still requested by
     users when removing the chip

  GPIO uAPI:
   - notify user-space about changes to GPIO lines' state (requested,
     released, reconfigured) triggered from the kernel as well (until
     now we'd only do this for changes triggered from user-space)
   - to that end: modify the internal workings of the notification
     mechanism by switching to an atomic notifier which allows us to
     send events from atomic context
   - also to that end store the debounce period in the GPIO descriptor
     struct and not in the character device context struct
   - while at it, also cover the corner-case of users introducing
     changes over sysfs while others watch them via the character device
   - don't report GPIO lines requested as interrupts as "used" to
     user-space as it can still request them as GPIOs

  New drivers:
   - GPIO part of the MFD Congatec Board Controller
   - PolarFire GPIO controller
   - GPIOs on FTDI FT2232H

  Driver improvements:
   - use generic device property accessors instead of OF-specific ones
     across many GPIO drivers (mpc8xxx, vf610, eic-sprd, davinci,
     ts4900, xilinx, mvebu)
   - use devres helpers to simplify error paths and either shrink or
     entirely remove the driver's remove() callback (grgpio, amdpt,
     menz127, max730x, ftgpio010, 74x164, ljca)
   - use helper variables to store the address of pdev->dev and avoid
     some line-breaks
   - use device_for_each_child_node_scoped() to avoid having to put the
     fwnode on breaks or errors (gpio-sim, gpio-dwapb, gpiolib-acpi)
   - use a scoped bitmap to simplify the code and drop goto labels in
     gpio-aggregator
   - drop unneeded Kconfig dependencies on OF_GPIO (grgpio, mveby,
     xilinx)
   - add support for new models to gpio-aspeed, gpio-rockchip and
     gpio-dwapb
   - clean-up ACPI handling and some other bits in gpio-xgene-sb
   - replace deprecated PCI functions in pcie-idio-24 and pci-idio-16
   - allow to build davinci and mvebu drivers with COMPILE_TEST=y
   - remove dead code in gpio-mb86s7x
   - switch back to using platform_driver::remove() (after the
     conversion to remove_new()) across the GPIO drivers
   - remove remaining uses of GPIOF_ACTIVE_LOW across the tree and drop
     this deprecated symbol
   - convert the gpio-altera driver to no longer pull in the deprecated
     legacy-of-mm-gpiochip.h header
   - use of_property_present() instead of of_property_read_bool() in
     gpiolib-of and gpio-rockchip
   - allow to build the tegra186 driver on Tegra234 platforms in Kconfig

  Late fixes:
   - add a missing return value check after devm_kasprintf() to
     gpio-grgpio

  DT bindings:
   - document the ngpios property of gpio-mmio
   - add support for a new aspeed model
   - fix the example for st,nomadik-gpio

  Other:
   - kernel doc and comments tweaks
   - fix typos in TODO
   - reorder headers alphabetically in some drivers
   - fix incorrect format specifiers in gpio tools"

* tag 'gpio-updates-for-v6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (98 commits)
  gpio: tegra186: Allow to enable driver on Tegra234
  gpio: grgpio: Add NULL check in grgpio_probe
  tools: gpio: Fix several incorrect format specifiers
  gpio: mpfs: add CoreGPIO support
  gpio: rockchip: support new version GPIO
  gpio: rockchip: change the GPIO version judgment logic
  gpio: rockchip: explan the format of the GPIO version ID
  gpiolib: cdev: use !mem_is_zero() instead of memchr_inv(s, 0, n)
  MAINTAINERS: add gpio driver to PolarFire entry
  gpio: Get rid of GPIOF_ACTIVE_LOW
  USB: gadget: pxa27x_udc: Avoid using GPIOF_ACTIVE_LOW
  pcmcia: soc_common: Avoid using GPIOF_ACTIVE_LOW
  leds: gpio: Avoid using GPIOF_ACTIVE_LOW
  Input: gpio_keys_polled - avoid using GPIOF_ACTIVE_LOW
  Input: gpio_keys - avoid using GPIOF_ACTIVE_LOW
  gpio: Use of_property_present() for non-boolean properties
  gpio: mpfs: add polarfire soc gpio support
  gpio: altera: Drop legacy-of-mm-gpiochip.h header
  gpio: pcie-idio-24: Replace deprecated PCI functions
  gpio: pci-idio-16: Replace deprecated PCI functions
  ...

Author: torvalds

Documentation/devicetree/bindings/gpio/aspeed,ast2400-gpio.yaml

@@ -15,6 +15,7 @@ properties:
       - aspeed,ast2400-gpio
       - aspeed,ast2500-gpio
       - aspeed,ast2600-gpio
+      - aspeed,ast2700-gpio
 
   reg:
     maxItems: 1
@@ -25,7 +26,7 @@ properties:
 
   gpio-controller: true
   gpio-line-names:
-    minItems: 36
+    minItems: 12
     maxItems: 232
 
   gpio-ranges: true
@@ -42,7 +43,7 @@ properties:
     const: 2
 
   ngpios:
-    minimum: 36
+    minimum: 12
     maximum: 232
 
 required:
@@ -93,6 +94,20 @@ allOf:
           enum: [ 36, 208 ]
       required:
         - ngpios
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: aspeed,ast2700-gpio
+    then:
+      properties:
+        gpio-line-names:
+          minItems: 12
+          maxItems: 216
+        ngpios:
+          enum: [ 12, 216 ]
+      required:
+        - ngpios
 
 additionalProperties: false
 

Documentation/devicetree/bindings/gpio/gpio-mmio.yaml

@@ -37,7 +37,8 @@ properties:
     description:
       A list of registers in the controller. The width of each register is
       determined by its size. All registers must have the same width. The number
-      of GPIOs is set by the width, with bit 0 corresponding to GPIO 0.
+      of GPIOs is set by the width, with bit 0 corresponding to GPIO 0, unless
+      the ngpios property further restricts the number of used lines.
     items:
       - description:
           Register to READ the value of the GPIO lines. If GPIO line is high,
@@ -74,6 +75,15 @@ properties:
 
   native-endian: true
 
+  ngpios:
+    minimum: 1
+    maximum: 63
+    description:
+      If this property is present the number of usable GPIO lines are restricted
+      to the first 0 .. ngpios lines. This is useful when the GPIO MMIO register
+      has 32 bits for GPIO but only the first 12 are actually connected to
+      real electronics, and then we set ngpios to 12.
+
   no-output:
     $ref: /schemas/types.yaml#/definitions/flag
     description:
@@ -111,6 +121,7 @@ examples:
       compatible = "brcm,bcm6345-gpio";
       reg-names = "dirout", "dat";
       reg = <0xfffe0406 2>, <0xfffe040a 2>;
+      ngpios = <15>;
       native-endian;
       gpio-controller;
       #gpio-cells = <2>;

Documentation/devicetree/bindings/gpio/st,nomadik-gpio.yaml

@@ -89,6 +89,7 @@ examples:
         interrupts = <0 120 0x4>;
         #gpio-cells = <2>;
         gpio-controller;
+        #interrupt-cells = <2>;
         interrupt-controller;
         st,supports-sleepmode;
         gpio-bank = <1>;

MAINTAINERS

@@ -5741,6 +5741,15 @@ F:	fs/configfs/
 F:	include/linux/configfs.h
 F:	samples/configfs/
 
+CONGATEC BOARD CONTROLLER MFD DRIVER
+M:	Thomas Richard <thomas.richard@bootlin.com>
+S:	Maintained
+F:	drivers/gpio/gpio-cgbc.c
+F:	drivers/i2c/busses/i2c-cgbc.c
+F:	drivers/mfd/cgbc-core.c
+F:	drivers/watchdog/cgbc_wdt.c
+F:	include/linux/mfd/cgbc.h
+
 CONSOLE SUBSYSTEM
 M:	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 S:	Supported
@@ -19879,6 +19888,7 @@ F:	arch/riscv/boot/dts/microchip/
 F:	drivers/char/hw_random/mpfs-rng.c
 F:	drivers/clk/microchip/clk-mpfs*.c
 F:	drivers/firmware/microchip/mpfs-auto-update.c
+F:	drivers/gpio/gpio-mpfs.c
 F:	drivers/i2c/busses/i2c-microchip-corei2c.c
 F:	drivers/mailbox/mailbox-mpfs.c
 F:	drivers/pci/controller/plda/pcie-microchip-host.c

drivers/gpio/Kconfig

@@ -70,8 +70,7 @@ config GPIO_SYSFS
 	  ioctl() operations instead.
 
 config GPIO_CDEV
-	bool
-	prompt "Character device (/dev/gpiochipN) support" if EXPERT
+	bool "Character device (/dev/gpiochipN) support" if EXPERT
 	default y
 	help
 	  Say Y here to add the character device /dev/gpiochipN interface
@@ -149,9 +148,7 @@ config GPIO_74XX_MMIO
 
 config GPIO_ALTERA
 	tristate "Altera GPIO"
-	depends on OF_GPIO
 	select GPIOLIB_IRQCHIP
-	select OF_GPIO_MM_GPIOCHIP
 	help
 	  Say Y or M here to build support for the Altera PIO device.
 
@@ -243,7 +240,7 @@ config GPIO_CLPS711X
 config GPIO_DAVINCI
 	tristate "TI Davinci/Keystone GPIO support"
 	default y if ARCH_DAVINCI
-	depends on (ARM || ARM64) && (ARCH_DAVINCI || ARCH_KEYSTONE || ARCH_K3)
+	depends on ((ARM || ARM64) && (ARCH_DAVINCI || ARCH_KEYSTONE || ARCH_K3)) || COMPILE_TEST
 	help
 	  Say yes here to enable GPIO support for TI Davinci/Keystone SoCs.
 
@@ -341,7 +338,6 @@ config GPIO_GRANITERAPIDS
 
 config GPIO_GRGPIO
 	tristate "Aeroflex Gaisler GRGPIO support"
-	depends on OF_GPIO
 	select GPIO_GENERIC
 	select IRQ_DOMAIN
 	help
@@ -487,8 +483,7 @@ config GPIO_MT7621
 
 config GPIO_MVEBU
 	def_bool y
-	depends on PLAT_ORION || ARCH_MVEBU
-	depends on OF_GPIO
+	depends on PLAT_ORION || ARCH_MVEBU || COMPILE_TEST
 	select GENERIC_IRQ_CHIP
 	select REGMAP_MMIO
 
@@ -549,6 +544,12 @@ config GPIO_PL061
 	help
 	  Say yes here to support the PrimeCell PL061 GPIO device.
 
+config GPIO_POLARFIRE_SOC
+	bool "Microchip FPGA GPIO support"
+	select REGMAP_MMIO
+	help
+	  Say yes here to support the GPIO controllers on Microchip FPGAs.
+
 config GPIO_PXA
 	bool "PXA GPIO support"
 	depends on ARCH_PXA || ARCH_MMP || COMPILE_TEST
@@ -714,13 +715,13 @@ config GPIO_TEGRA
 
 config GPIO_TEGRA186
 	tristate "NVIDIA Tegra186 GPIO support"
-	default ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC
-	depends on ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC || COMPILE_TEST
+	default ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC || ARCH_TEGRA_234_SOC
+	depends on ARCH_TEGRA_186_SOC || ARCH_TEGRA_194_SOC || ARCH_TEGRA_234_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.
+	  Say yes here to support GPIO pins on NVIDIA Tegra186, 194 and 234 SoCs.
 
 config GPIO_TS4800
 	tristate "TS-4800 DIO blocks and compatibles"
@@ -796,7 +797,6 @@ config GPIO_XGENE_SB
 config GPIO_XILINX
 	tristate "Xilinx GPIO support"
 	select GPIOLIB_IRQCHIP
-	depends on OF_GPIO
 	help
 	  Say yes here to support the Xilinx FPGA GPIO device.
 
@@ -1287,6 +1287,16 @@ config GPIO_BD9571MWV
 	  This driver can also be built as a module. If so, the module
 	  will be called gpio-bd9571mwv.
 
+config GPIO_CGBC
+	tristate "Congatec Board Controller GPIO support"
+	depends on MFD_CGBC
+	help
+	  Select this option to enable GPIO support for the Congatec Board
+	  Controller.
+
+	  This driver can also be built as a module. If so, the module will be
+	  called gpio-cgbc.
+
 config GPIO_CROS_EC
 	tristate "ChromeOS EC GPIO support"
 	depends on CROS_EC
@@ -1844,6 +1854,13 @@ config GPIO_VIPERBOARD
 	  River Tech's viperboard.h for detailed meaning
 	  of the module parameters.
 
+config GPIO_MPSSE
+	tristate "FTDI MPSSE GPIO support"
+	select GPIOLIB_IRQCHIP
+	help
+	  GPIO driver for FTDI's MPSSE interface. These can do input and
+	  output. Each MPSSE provides 16 IO pins.
+
 endmenu
 
 menu "Virtual GPIO drivers"

drivers/gpio/Makefile

@@ -45,6 +45,7 @@ obj-$(CONFIG_GPIO_BD9571MWV)		+= gpio-bd9571mwv.o
 obj-$(CONFIG_GPIO_BRCMSTB)		+= gpio-brcmstb.o
 obj-$(CONFIG_GPIO_BT8XX)		+= gpio-bt8xx.o
 obj-$(CONFIG_GPIO_CADENCE)		+= gpio-cadence.o
+obj-$(CONFIG_GPIO_CGBC)			+= gpio-cgbc.o
 obj-$(CONFIG_GPIO_CLPS711X)		+= gpio-clps711x.o
 obj-$(CONFIG_GPIO_SNPS_CREG)		+= gpio-creg-snps.o
 obj-$(CONFIG_GPIO_CROS_EC)		+= gpio-cros-ec.o
@@ -114,6 +115,7 @@ obj-$(CONFIG_GPIO_MOCKUP)		+= gpio-mockup.o
 obj-$(CONFIG_GPIO_MOXTET)		+= gpio-moxtet.o
 obj-$(CONFIG_GPIO_MPC5200)		+= gpio-mpc5200.o
 obj-$(CONFIG_GPIO_MPC8XXX)		+= gpio-mpc8xxx.o
+obj-$(CONFIG_GPIO_MPSSE)		+= gpio-mpsse.o
 obj-$(CONFIG_GPIO_MSC313)		+= gpio-msc313.o
 obj-$(CONFIG_GPIO_MT7621)		+= gpio-mt7621.o
 obj-$(CONFIG_GPIO_MVEBU)		+= gpio-mvebu.o
@@ -133,6 +135,7 @@ obj-$(CONFIG_GPIO_PCI_IDIO_16)		+= gpio-pci-idio-16.o
 obj-$(CONFIG_GPIO_PISOSR)		+= gpio-pisosr.o
 obj-$(CONFIG_GPIO_PL061)		+= gpio-pl061.o
 obj-$(CONFIG_GPIO_PMIC_EIC_SPRD)	+= gpio-pmic-eic-sprd.o
+obj-$(CONFIG_GPIO_POLARFIRE_SOC)	+= gpio-mpfs.o
 obj-$(CONFIG_GPIO_PXA)			+= gpio-pxa.o
 obj-$(CONFIG_GPIO_RASPBERRYPI_EXP)	+= gpio-raspberrypi-exp.o
 obj-$(CONFIG_GPIO_RC5T583)		+= gpio-rc5t583.o

drivers/gpio/TODO

@@ -61,8 +61,8 @@ Work items:
 
 - Change all consumer drivers that #include <linux/of_gpio.h> to
   #include <linux/gpio/consumer.h> and stop doing custom parsing of the
-  GPIO lines from the device tree. This can be tricky and often ivolves
-  changing boardfiles, etc.
+  GPIO lines from the device tree. This can be tricky and often involves
+  changing board files, etc.
 
 - Pull semantics for legacy device tree (OF) GPIO lookups into
   gpiolib-of.c: in some cases subsystems are doing custom flags and

drivers/gpio/gpio-74x164.c

@@ -143,33 +143,24 @@ static int gen_74x164_probe(struct spi_device *spi)
 	chip->gpio_chip.parent = &spi->dev;
 	chip->gpio_chip.owner = THIS_MODULE;
 
-	mutex_init(&chip->lock);
+	ret = devm_mutex_init(&spi->dev, &chip->lock);
+	if (ret)
+		return ret;
 
 	ret = __gen_74x164_write_config(chip);
-	if (ret) {
-		dev_err(&spi->dev, "Failed writing: %d\n", ret);
-		goto exit_destroy;
-	}
+	if (ret)
+		return dev_err_probe(&spi->dev, ret, "Config write failed\n");
 
 	gpiod_set_value_cansleep(chip->gpiod_oe, 1);
 
-	ret = gpiochip_add_data(&chip->gpio_chip, chip);
-	if (!ret)
-		return 0;
-
-exit_destroy:
-	mutex_destroy(&chip->lock);
-
-	return ret;
+	return devm_gpiochip_add_data(&spi->dev, &chip->gpio_chip, chip);
 }
 
 static void gen_74x164_remove(struct spi_device *spi)
 {
 	struct gen_74x164_chip *chip = spi_get_drvdata(spi);
 
 	gpiod_set_value_cansleep(chip->gpiod_oe, 0);
-	gpiochip_remove(&chip->gpio_chip);
-	mutex_destroy(&chip->lock);
 }
 
 static const struct spi_device_id gen_74x164_spi_ids[] = {

drivers/gpio/gpio-aggregator.c

@@ -65,11 +65,11 @@ static int aggr_parse(struct gpio_aggregator *aggr)
 {
 	char *args = skip_spaces(aggr->args);
 	char *name, *offsets, *p;
-	unsigned long *bitmap;
 	unsigned int i, n = 0;
 	int error = 0;
 
-	bitmap = bitmap_alloc(AGGREGATOR_MAX_GPIOS, GFP_KERNEL);
+	unsigned long *bitmap __free(bitmap) =
+			bitmap_alloc(AGGREGATOR_MAX_GPIOS, GFP_KERNEL);
 	if (!bitmap)
 		return -ENOMEM;
 
@@ -82,7 +82,7 @@ static int aggr_parse(struct gpio_aggregator *aggr)
 			/* Named GPIO line */
 			error = aggr_add_gpio(aggr, name, U16_MAX, &n);
 			if (error)
-				goto free_bitmap;
+				return error;
 
 			name = offsets;
 			continue;
@@ -92,26 +92,24 @@ static int aggr_parse(struct gpio_aggregator *aggr)
 		error = bitmap_parselist(offsets, bitmap, AGGREGATOR_MAX_GPIOS);
 		if (error) {
 			pr_err("Cannot parse %s: %d\n", offsets, error);
-			goto free_bitmap;
+			return error;
 		}
 
 		for_each_set_bit(i, bitmap, AGGREGATOR_MAX_GPIOS) {
 			error = aggr_add_gpio(aggr, name, i, &n);
 			if (error)
-				goto free_bitmap;
+				return error;
 		}
 
 		args = next_arg(args, &name, &p);
 	}
 
 	if (!n) {
 		pr_err("No GPIOs specified\n");
-		error = -EINVAL;
+		return -EINVAL;
 	}
 
-free_bitmap:
-	bitmap_free(bitmap);
-	return error;
+	return 0;
 }
 
 static ssize_t new_device_store(struct device_driver *driver, const char *buf,