Merge tag 'gpio-v5.9-1' 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 v5.9 kernel cycle.

  There is nothing too exciting in it, but a new macro that fixes a
  build failure on a minor ARM32 platform that appeared yesterday is
  part of it so we better merge it.

  Core changes:

   - Introduce the for_each_requested_gpio() macro to help in dependent
     code all over the place. Also patch a few locations to use it while
     we are at it.

   - Split out the sysfs code into its own file.

   - Split out the character device code into its own file, then make a
     set of refactorings and improvements to this code. We are setting
     the stage to revamp the userspace API a bit in the next cycle.

   - Fix a whole slew of kerneldoc that was wrong or missing.

  New drivers:

   - The PCA953x driver now supports the PCAL9535.

  Driver improvements:

   - A host of incremental modernizations and improvements to the
     PCA953x driver.

   - Incremental improvements to the Xilinx Zynq driver.

   - Some improvements to the GPIO aggregator driver.

   - I ran all over the place switching all threaded and other drivers
     requesting their own IRQ while using the core GPIO IRQ helpers to
     pass the GPIO irq chip as a template instead of calling the
     explicit set-up functions. Next merge window we may retire the old
     code altogether"

* tag 'gpio-v5.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (97 commits)
  gpio: wcove: Request IRQ after all initialisation done
  gpio: crystalcove: Free IRQ on error path
  gpio: pca953x: Request IRQ after all initialisation done
  gpio: don't use same lockdep class for all devm_gpiochip_add_data users
  gpio: max732x: Use irqchip template
  gpio: stmpe: Move chip registration
  gpio: rcar: Use irqchip template
  gpio: regmap: fix type clash
  gpio: Correct kernel-doc inconsistency
  gpio: pci-idio-16: Use irqchip template
  gpio: pcie-idio-24: Use irqchip template
  gpio: 104-idio-16: Use irqchip template
  gpio: 104-idi-48: Use irqchip template
  gpio: 104-dio-48e: Use irqchip template
  gpio: ws16c48: Use irqchip template
  gpio: omap: improve coding style for pin config flags
  gpio: dln2: Use irqchip template
  gpio: sch: Add a blank line between declaration and code
  gpio: sch: changed every 'unsigned' to 'unsigned int'
  gpio: ich: changed every 'unsigned' to 'unsigned int'
  ...

Documentation/devicetree/bindings/gpio/gpio-pca953x.txt

@@ -19,6 +19,7 @@ Required properties:
 	nxp,pca9698
 	nxp,pcal6416
 	nxp,pcal6524
+	nxp,pcal9535
 	nxp,pcal9555a
 	maxim,max7310
 	maxim,max7312

Documentation/devicetree/bindings/gpio/gpio-pca9570.yaml

@@ -0,0 +1,47 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/gpio/gpio-pca9570.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: PCA9570 I2C GPO expander
+
+maintainers:
+  - Sungbo Eo <mans0n@gorani.run>
+
+properties:
+  compatible:
+    enum:
+      - nxp,pca9570
+
+  reg:
+    maxItems: 1
+
+  gpio-controller: true
+
+  '#gpio-cells':
+    const: 2
+
+required:
+  - compatible
+  - reg
+  - gpio-controller
+  - "#gpio-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c0 {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        gpio@24 {
+            compatible = "nxp,pca9570";
+            reg = <0x24>;
+            gpio-controller;
+            #gpio-cells = <2>;
+        };
+    };
+
+...

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

@@ -6,7 +6,9 @@ Required properties:
 			  - First cell is the GPIO line number
 			  - Second cell is used to specify optional
 			    parameters (unused)
-- compatible		: Should be "xlnx,zynq-gpio-1.0" or "xlnx,zynqmp-gpio-1.0"
+- compatible		: Should be "xlnx,zynq-gpio-1.0" or
+			  "xlnx,zynqmp-gpio-1.0" or "xlnx,versal-gpio-1.0
+			  or "xlnx,pmc-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

Documentation/driver-api/gpio/drivers-on-gpio.rst

@@ -89,6 +89,13 @@ hardware descriptions such as device tree or ACPI:
   Consumer Electronics Control bus using only GPIO. It is used to communicate
   with devices on the HDMI bus.
 
+- gpio-charger: drivers/power/supply/gpio-charger.c is used if you need to do
+  battery charging and all you have to go by to check the presence of the
+  AC charger or more complex tasks such as indicating charging status using
+  nothing but GPIO lines, this driver provides that and also a clearly defined
+  way to pass the charging parameters from hardware descriptions such as the
+  device tree.
+
 Apart from this there are special GPIO drivers in subsystems like MMC/SD to
 read card detect and write protect GPIO lines, and in the TTY serial subsystem
 to emulate MCTRL (modem control) signals CTS/RTS by using two GPIO lines. The

drivers/gpio/Kconfig

@@ -410,7 +410,7 @@ config GPIO_MXS
 
 config GPIO_OCTEON
 	tristate "Cavium OCTEON GPIO"
-	depends on GPIOLIB && CAVIUM_OCTEON_SOC
+	depends on CAVIUM_OCTEON_SOC
 	default y
 	help
 	  Say yes here to support the on-chip GPIO lines on the OCTEON
@@ -962,6 +962,14 @@ config GPIO_PCA953X_IRQ
 	  Say yes here to enable the pca953x to be used as an interrupt
 	  controller. It requires the driver to be built in the kernel.
 
+config GPIO_PCA9570
+	tristate "PCA9570 4-Bit I2C GPO expander"
+	help
+	  Say yes here to enable the GPO driver for the NXP PCA9570 chip.
+
+	  To compile this driver as a module, choose M here: the module will
+	  be called gpio-pca9570.
+
 config GPIO_PCF857X
 	tristate "PCF857x, PCA{85,96}7x, and MAX732[89] I2C GPIO expanders"
 	select GPIOLIB_IRQCHIP
@@ -1117,7 +1125,7 @@ config GPIO_DLN2
 
 config HTC_EGPIO
 	bool "HTC EGPIO support"
-	depends on GPIOLIB && ARM
+	depends on ARM
 	help
 	  This driver supports the CPLD egpio chip present on
 	  several HTC phones.  It provides basic support for input

drivers/gpio/Makefile

@@ -7,6 +7,7 @@ obj-$(CONFIG_GPIOLIB)		+= gpiolib.o
 obj-$(CONFIG_GPIOLIB)		+= gpiolib-devres.o
 obj-$(CONFIG_GPIOLIB)		+= gpiolib-legacy.o
 obj-$(CONFIG_GPIOLIB)		+= gpiolib-devprop.o
+obj-$(CONFIG_GPIOLIB)		+= gpiolib-cdev.o
 obj-$(CONFIG_OF_GPIO)		+= gpiolib-of.o
 obj-$(CONFIG_GPIO_SYSFS)	+= gpiolib-sysfs.o
 obj-$(CONFIG_GPIO_ACPI)		+= gpiolib-acpi.o
@@ -110,6 +111,7 @@ obj-$(CONFIG_GPIO_OCTEON)		+= gpio-octeon.o
 obj-$(CONFIG_GPIO_OMAP)			+= gpio-omap.o
 obj-$(CONFIG_GPIO_PALMAS)		+= gpio-palmas.o
 obj-$(CONFIG_GPIO_PCA953X)		+= gpio-pca953x.o
+obj-$(CONFIG_GPIO_PCA9570)		+= gpio-pca9570.o
 obj-$(CONFIG_GPIO_PCF857X)		+= gpio-pcf857x.o
 obj-$(CONFIG_GPIO_PCH)			+= gpio-pch.o
 obj-$(CONFIG_GPIO_PCIE_IDIO_24)		+= gpio-pcie-idio-24.o

drivers/gpio/TODO

@@ -5,7 +5,7 @@ subsystem.
 GPIO descriptors
 
 Starting with commit 79a9becda894 the GPIO subsystem embarked on a journey
-to move away from the global GPIO numberspace and toward a decriptor-based
+to move away from the global GPIO numberspace and toward a descriptor-based
 approach. This means that GPIO consumers, drivers and machine descriptions
 ideally have no use or idea of the global GPIO numberspace that has/was
 used in the inception of the GPIO subsystem.

drivers/gpio/gpio-104-dio-48e.c

@@ -368,10 +368,21 @@ static const char *dio48e_names[DIO48E_NGPIO] = {
 	"PPI Group 1 Port C 5", "PPI Group 1 Port C 6", "PPI Group 1 Port C 7"
 };
 
+static int dio48e_irq_init_hw(struct gpio_chip *gc)
+{
+	struct dio48e_gpio *const dio48egpio = gpiochip_get_data(gc);
+
+	/* Disable IRQ by default */
+	inb(dio48egpio->base + 0xB);
+
+	return 0;
+}
+
 static int dio48e_probe(struct device *dev, unsigned int id)
 {
 	struct dio48e_gpio *dio48egpio;
 	const char *const name = dev_name(dev);
+	struct gpio_irq_chip *girq;
 	int err;
 
 	dio48egpio = devm_kzalloc(dev, sizeof(*dio48egpio), GFP_KERNEL);
@@ -399,13 +410,17 @@ static int dio48e_probe(struct device *dev, unsigned int id)
 	dio48egpio->chip.set_multiple = dio48e_gpio_set_multiple;
 	dio48egpio->base = base[id];
 
-	raw_spin_lock_init(&dio48egpio->lock);
+	girq = &dio48egpio->chip.irq;
+	girq->chip = &dio48e_irqchip;
+	/* This will let us handle the parent IRQ in the driver */
+	girq->parent_handler = NULL;
+	girq->num_parents = 0;
+	girq->parents = NULL;
+	girq->default_type = IRQ_TYPE_NONE;
+	girq->handler = handle_edge_irq;
+	girq->init_hw = dio48e_irq_init_hw;
 
-	err = devm_gpiochip_add_data(dev, &dio48egpio->chip, dio48egpio);
-	if (err) {
-		dev_err(dev, "GPIO registering failed (%d)\n", err);
-		return err;
-	}
+	raw_spin_lock_init(&dio48egpio->lock);
 
 	/* initialize all GPIO as output */
 	outb(0x80, base[id] + 3);
@@ -419,13 +434,9 @@ static int dio48e_probe(struct device *dev, unsigned int id)
 	outb(0x00, base[id] + 6);
 	outb(0x00, base[id] + 7);
 
-	/* disable IRQ by default */
-	inb(base[id] + 0xB);
-
-	err = gpiochip_irqchip_add(&dio48egpio->chip, &dio48e_irqchip, 0,
-		handle_edge_irq, IRQ_TYPE_NONE);
+	err = devm_gpiochip_add_data(dev, &dio48egpio->chip, dio48egpio);
 	if (err) {
-		dev_err(dev, "Could not add irqchip (%d)\n", err);
+		dev_err(dev, "GPIO registering failed (%d)\n", err);
 		return err;
 	}
 

drivers/gpio/gpio-104-idi-48.c

@@ -247,10 +247,22 @@ static const char *idi48_names[IDI48_NGPIO] = {
 	"Bit 18 B", "Bit 19 B", "Bit 20 B", "Bit 21 B", "Bit 22 B", "Bit 23 B"
 };
 
+static int idi_48_irq_init_hw(struct gpio_chip *gc)
+{
+	struct idi_48_gpio *const idi48gpio = gpiochip_get_data(gc);
+
+	/* Disable IRQ by default */
+	outb(0, idi48gpio->base + 7);
+	inb(idi48gpio->base + 7);
+
+	return 0;
+}
+
 static int idi_48_probe(struct device *dev, unsigned int id)
 {
 	struct idi_48_gpio *idi48gpio;
 	const char *const name = dev_name(dev);
+	struct gpio_irq_chip *girq;
 	int err;
 
 	idi48gpio = devm_kzalloc(dev, sizeof(*idi48gpio), GFP_KERNEL);
@@ -275,6 +287,16 @@ static int idi_48_probe(struct device *dev, unsigned int id)
 	idi48gpio->chip.get_multiple = idi_48_gpio_get_multiple;
 	idi48gpio->base = base[id];
 
+	girq = &idi48gpio->chip.irq;
+	girq->chip = &idi_48_irqchip;
+	/* This will let us handle the parent IRQ in the driver */
+	girq->parent_handler = NULL;
+	girq->num_parents = 0;
+	girq->parents = NULL;
+	girq->default_type = IRQ_TYPE_NONE;
+	girq->handler = handle_edge_irq;
+	girq->init_hw = idi_48_irq_init_hw;
+
 	raw_spin_lock_init(&idi48gpio->lock);
 	spin_lock_init(&idi48gpio->ack_lock);
 
@@ -284,17 +306,6 @@ static int idi_48_probe(struct device *dev, unsigned int id)
 		return err;
 	}
 
-	/* Disable IRQ by default */
-	outb(0, base[id] + 7);
-	inb(base[id] + 7);
-
-	err = gpiochip_irqchip_add(&idi48gpio->chip, &idi_48_irqchip, 0,
-		handle_edge_irq, IRQ_TYPE_NONE);
-	if (err) {
-		dev_err(dev, "Could not add irqchip (%d)\n", err);
-		return err;
-	}
-
 	err = devm_request_irq(dev, irq[id], idi_48_irq_handler, IRQF_SHARED,
 		name, idi48gpio);
 	if (err) {

drivers/gpio/gpio-104-idio-16.c

@@ -224,10 +224,22 @@ static const char *idio_16_names[IDIO_16_NGPIO] = {
 	"IIN8", "IIN9", "IIN10", "IIN11", "IIN12", "IIN13", "IIN14", "IIN15"
 };
 
+static int idio_16_irq_init_hw(struct gpio_chip *gc)
+{
+	struct idio_16_gpio *const idio16gpio = gpiochip_get_data(gc);
+
+	/* Disable IRQ by default */
+	outb(0, idio16gpio->base + 2);
+	outb(0, idio16gpio->base + 1);
+
+	return 0;
+}
+
 static int idio_16_probe(struct device *dev, unsigned int id)
 {
 	struct idio_16_gpio *idio16gpio;
 	const char *const name = dev_name(dev);
+	struct gpio_irq_chip *girq;
 	int err;
 
 	idio16gpio = devm_kzalloc(dev, sizeof(*idio16gpio), GFP_KERNEL);
@@ -256,6 +268,16 @@ static int idio_16_probe(struct device *dev, unsigned int id)
 	idio16gpio->base = base[id];
 	idio16gpio->out_state = 0xFFFF;
 
+	girq = &idio16gpio->chip.irq;
+	girq->chip = &idio_16_irqchip;
+	/* This will let us handle the parent IRQ in the driver */
+	girq->parent_handler = NULL;
+	girq->num_parents = 0;
+	girq->parents = NULL;
+	girq->default_type = IRQ_TYPE_NONE;
+	girq->handler = handle_edge_irq;
+	girq->init_hw = idio_16_irq_init_hw;
+
 	raw_spin_lock_init(&idio16gpio->lock);
 
 	err = devm_gpiochip_add_data(dev, &idio16gpio->chip, idio16gpio);
@@ -264,17 +286,6 @@ static int idio_16_probe(struct device *dev, unsigned int id)
 		return err;
 	}
 
-	/* Disable IRQ by default */
-	outb(0, base[id] + 2);
-	outb(0, base[id] + 1);
-
-	err = gpiochip_irqchip_add(&idio16gpio->chip, &idio_16_irqchip, 0,
-		handle_edge_irq, IRQ_TYPE_NONE);
-	if (err) {
-		dev_err(dev, "Could not add irqchip (%d)\n", err);
-		return err;
-	}
-
 	err = devm_request_irq(dev, irq[id], idio_16_irq_handler, 0, name,
 		idio16gpio);
 	if (err) {