Merge tag 'gpio-updates-for-v5.10-part2' of...

Merge tag 'gpio-updates-for-v5.10-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into devel

gpio updates for v5.10 - part 2

- refactor gpio-mockup testing module
- simplify the code in gpio-mpc8xxx
- implement v2 of the GPIO user API

Documentation/admin-guide/gpio/gpio-mockup.rst

+.. SPDX-License-Identifier: GPL-2.0-only
+
+GPIO Testing Driver
+===================
+
+The GPIO Testing Driver (gpio-mockup) provides a way to create simulated GPIO
+chips for testing purposes. The lines exposed by these chips can be accessed
+using the standard GPIO character device interface as well as manipulated
+using the dedicated debugfs directory structure.
+
+Creating simulated chips using module params
+--------------------------------------------
+
+When loading the gpio-mockup driver a number of parameters can be passed to the
+module.
+
+    gpio_mockup_ranges
+
+        This parameter takes an argument in the form of an array of integer
+        pairs. Each pair defines the base GPIO number (if any) and the number
+        of lines exposed by the chip. If the base GPIO is -1, the gpiolib
+        will assign it automatically.
+
+        Example: gpio_mockup_ranges=-1,8,-1,16,405,4
+
+        The line above creates three chips. The first one will expose 8 lines,
+        the second 16 and the third 4. The base GPIO for the third chip is set
+        to 405 while for two first chips it will be assigned automatically.
+
+    gpio_named_lines
+
+        This parameter doesn't take any arguments. It lets the driver know that
+        GPIO lines exposed by it should be named.
+
+        The name format is: gpio-mockup-X-Y where X is mockup chip's ID
+        and Y is the line offset.
+
+Manipulating simulated lines
+----------------------------
+
+Each mockup chip creates its own subdirectory in /sys/kernel/debug/gpio-mockup/.
+The directory is named after the chip's label. A symlink is also created, named
+after the chip's name, which points to the label directory.
+
+Inside each subdirectory, there's a separate attribute for each GPIO line. The
+name of the attribute represents the line's offset in the chip.
+
+Reading from a line attribute returns the current value. Writing to it (0 or 1)
+changes the configuration of the simulated pull-up/pull-down resistor
+(1 - pull-up, 0 - pull-down).

drivers/gpio/Kconfig

@@ -66,8 +66,33 @@ config GPIO_SYSFS
 
 	  This ABI is deprecated. If you want to use GPIO from userspace,
 	  use the character device /dev/gpiochipN with the appropriate
-	  ioctl() operations instead. The character device is always
-	  available.
+	  ioctl() operations instead.
+
+config GPIO_CDEV
+	bool
+	prompt "Character device (/dev/gpiochipN) support" if EXPERT
+	default y
+	help
+	  Say Y here to add the character device /dev/gpiochipN interface
+	  for GPIOs. The character device allows userspace to control GPIOs
+	  using ioctl() operations.
+
+	  Only say N if you are sure that the GPIO character device is not
+	  required.
+
+	  If unsure, say Y.
+
+config GPIO_CDEV_V1
+	bool "Support GPIO ABI Version 1"
+	default y
+	depends on GPIO_CDEV
+	help
+	  Say Y here to support version 1 of the GPIO CDEV ABI.
+
+	  This ABI version is deprecated.
+	  Please use the latest ABI for new developments.
+
+	  If unsure, say Y.
 
 config GPIO_GENERIC
 	depends on HAS_IOMEM # Only for IOMEM drivers

drivers/gpio/Makefile

@@ -6,8 +6,8 @@ ccflags-$(CONFIG_DEBUG_GPIO)	+= -DDEBUG
 obj-$(CONFIG_GPIOLIB)		+= gpiolib.o
 obj-$(CONFIG_GPIOLIB)		+= gpiolib-devres.o
 obj-$(CONFIG_GPIOLIB)		+= gpiolib-legacy.o
-obj-$(CONFIG_GPIOLIB)		+= gpiolib-cdev.o
 obj-$(CONFIG_OF_GPIO)		+= gpiolib-of.o
+obj-$(CONFIG_GPIO_CDEV)		+= gpiolib-cdev.o
 obj-$(CONFIG_GPIO_SYSFS)	+= gpiolib-sysfs.o
 obj-$(CONFIG_GPIO_ACPI)		+= gpiolib-acpi.o
 

drivers/gpio/gpio-mockup.c

@@ -7,10 +7,10 @@
  * Copyright (C) 2017 Bartosz Golaszewski <brgl@bgdev.pl>
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/debugfs.h>
-#include <linux/gpio/consumer.h>
 #include <linux/gpio/driver.h>
-#include <linux/init.h>
 #include <linux/interrupt.h>
 #include <linux/irq.h>
 #include <linux/irq_sim.h>
@@ -19,21 +19,19 @@
 #include <linux/platform_device.h>
 #include <linux/property.h>
 #include <linux/slab.h>
+#include <linux/string_helpers.h>
 #include <linux/uaccess.h>
 
 #include "gpiolib.h"
 
-#define GPIO_MOCKUP_NAME	"gpio-mockup"
 #define GPIO_MOCKUP_MAX_GC	10
 /*
  * We're storing two values per chip: the GPIO base and the number
  * of GPIO lines.
  */
 #define GPIO_MOCKUP_MAX_RANGES	(GPIO_MOCKUP_MAX_GC * 2)
-/* Maximum of three properties + the sentinel. */
-#define GPIO_MOCKUP_MAX_PROP	4
-
-#define gpio_mockup_err(...)	pr_err(GPIO_MOCKUP_NAME ": " __VA_ARGS__)
+/* Maximum of four properties + the sentinel. */
+#define GPIO_MOCKUP_MAX_PROP	5
 
 /*
  * struct gpio_pin_status - structure describing a GPIO status
@@ -375,31 +373,6 @@ static void gpio_mockup_debugfs_setup(struct device *dev,
 		debugfs_create_file(name, 0200, chip->dbg_dir, priv,
 				    &gpio_mockup_debugfs_ops);
 	}
-
-	return;
-}
-
-static int gpio_mockup_name_lines(struct device *dev,
-				  struct gpio_mockup_chip *chip)
-{
-	struct gpio_chip *gc = &chip->gc;
-	char **names;
-	int i;
-
-	names = devm_kcalloc(dev, gc->ngpio, sizeof(char *), GFP_KERNEL);
-	if (!names)
-		return -ENOMEM;
-
-	for (i = 0; i < gc->ngpio; i++) {
-		names[i] = devm_kasprintf(dev, GFP_KERNEL,
-					  "%s-%d", gc->label, i);
-		if (!names[i])
-			return -ENOMEM;
-	}
-
-	gc->names = (const char *const *)names;
-
-	return 0;
 }
 
 static void gpio_mockup_dispose_mappings(void *data)
@@ -434,21 +407,14 @@ static int gpio_mockup_probe(struct platform_device *pdev)
 	if (rv)
 		return rv;
 
-	rv = device_property_read_string(dev, "chip-name", &name);
+	rv = device_property_read_string(dev, "chip-label", &name);
 	if (rv)
-		name = NULL;
+		name = dev_name(dev);
 
 	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
 	if (!chip)
 		return -ENOMEM;
 
-	if (!name) {
-		name = devm_kasprintf(dev, GFP_KERNEL,
-				      "%s-%c", pdev->name, pdev->id + 'A');
-		if (!name)
-			return -ENOMEM;
-	}
-
 	mutex_init(&chip->lock);
 
 	gc = &chip->gc;
@@ -476,12 +442,6 @@ static int gpio_mockup_probe(struct platform_device *pdev)
 	for (i = 0; i < gc->ngpio; i++)
 		chip->lines[i].dir = GPIO_LINE_DIRECTION_IN;
 
-	if (device_property_read_bool(dev, "named-gpio-lines")) {
-		rv = gpio_mockup_name_lines(dev, chip);
-		if (rv)
-			return rv;
-	}
-
 	chip->irq_sim_domain = devm_irq_domain_create_sim(dev, NULL,
 							  gc->ngpio);
 	if (IS_ERR(chip->irq_sim_domain))
@@ -502,7 +462,7 @@ static int gpio_mockup_probe(struct platform_device *pdev)
 
 static struct platform_driver gpio_mockup_driver = {
 	.driver = {
-		.name = GPIO_MOCKUP_NAME,
+		.name = "gpio-mockup",
 	},
 	.probe = gpio_mockup_probe,
 };
@@ -522,14 +482,80 @@ static void gpio_mockup_unregister_pdevs(void)
 	}
 }
 
-static int __init gpio_mockup_init(void)
+static __init char **gpio_mockup_make_line_names(const char *label,
+						 unsigned int num_lines)
+{
+	unsigned int i;
+	char **names;
+
+	names = kcalloc(num_lines + 1, sizeof(char *), GFP_KERNEL);
+	if (!names)
+		return NULL;
+
+	for (i = 0; i < num_lines; i++) {
+		names[i] = kasprintf(GFP_KERNEL, "%s-%u", label, i);
+		if (!names[i]) {
+			kfree_strarray(names, i);
+			return NULL;
+		}
+	}
+
+	return names;
+}
+
+static int __init gpio_mockup_register_chip(int idx)
 {
 	struct property_entry properties[GPIO_MOCKUP_MAX_PROP];
-	int i, prop, num_chips, err = 0, base;
 	struct platform_device_info pdevinfo;
 	struct platform_device *pdev;
+	char **line_names = NULL;
+	char chip_label[32];
+	int prop = 0, base;
 	u16 ngpio;
 
+	memset(properties, 0, sizeof(properties));
+	memset(&pdevinfo, 0, sizeof(pdevinfo));
+
+	snprintf(chip_label, sizeof(chip_label), "gpio-mockup-%c", idx + 'A');
+	properties[prop++] = PROPERTY_ENTRY_STRING("chip-label", chip_label);
+
+	base = gpio_mockup_range_base(idx);
+	if (base >= 0)
+		properties[prop++] = PROPERTY_ENTRY_U32("gpio-base", base);
+
+	ngpio = base < 0 ? gpio_mockup_range_ngpio(idx)
+			 : gpio_mockup_range_ngpio(idx) - base;
+	properties[prop++] = PROPERTY_ENTRY_U16("nr-gpios", ngpio);
+
+	if (gpio_mockup_named_lines) {
+		line_names = gpio_mockup_make_line_names(chip_label, ngpio);
+		if (!line_names)
+			return -ENOMEM;
+
+		properties[prop++] = PROPERTY_ENTRY_STRING_ARRAY_LEN(
+					"gpio-line-names", line_names, ngpio);
+	}
+
+	pdevinfo.name = "gpio-mockup";
+	pdevinfo.id = idx;
+	pdevinfo.properties = properties;
+
+	pdev = platform_device_register_full(&pdevinfo);
+	kfree_strarray(line_names, ngpio);
+	if (IS_ERR(pdev)) {
+		pr_err("error registering device");
+		return PTR_ERR(pdev);
+	}
+
+	gpio_mockup_pdevs[idx] = pdev;
+
+	return 0;
+}
+
+static int __init gpio_mockup_init(void)
+{
+	int i, num_chips, err;
+
 	if ((gpio_mockup_num_ranges < 2) ||
 	    (gpio_mockup_num_ranges % 2) ||
 	    (gpio_mockup_num_ranges > GPIO_MOCKUP_MAX_RANGES))
@@ -551,41 +577,19 @@ static int __init gpio_mockup_init(void)
 
 	err = platform_driver_register(&gpio_mockup_driver);
 	if (err) {
-		gpio_mockup_err("error registering platform driver\n");
+		pr_err("error registering platform driver\n");
+		debugfs_remove_recursive(gpio_mockup_dbg_dir);
 		return err;
 	}
 
 	for (i = 0; i < num_chips; i++) {
-		memset(properties, 0, sizeof(properties));
-		memset(&pdevinfo, 0, sizeof(pdevinfo));
-		prop = 0;
-
-		base = gpio_mockup_range_base(i);
-		if (base >= 0)
-			properties[prop++] = PROPERTY_ENTRY_U32("gpio-base",
-								base);
-
-		ngpio = base < 0 ? gpio_mockup_range_ngpio(i)
-				 : gpio_mockup_range_ngpio(i) - base;
-		properties[prop++] = PROPERTY_ENTRY_U16("nr-gpios", ngpio);
-
-		if (gpio_mockup_named_lines)
-			properties[prop++] = PROPERTY_ENTRY_BOOL(
-						"named-gpio-lines");
-
-		pdevinfo.name = GPIO_MOCKUP_NAME;
-		pdevinfo.id = i;
-		pdevinfo.properties = properties;
-
-		pdev = platform_device_register_full(&pdevinfo);
-		if (IS_ERR(pdev)) {
-			gpio_mockup_err("error registering device");
+		err = gpio_mockup_register_chip(i);
+		if (err) {
 			platform_driver_unregister(&gpio_mockup_driver);
 			gpio_mockup_unregister_pdevs();
-			return PTR_ERR(pdev);
+			debugfs_remove_recursive(gpio_mockup_dbg_dir);
+			return err;
 		}
-
-		gpio_mockup_pdevs[i] = pdev;
 	}
 
 	return 0;

drivers/gpio/gpio-mpc8xxx.c

@@ -47,27 +47,6 @@ struct mpc8xxx_gpio_chip {
 	unsigned int irqn;
 };
 
-/* The GPIO Input Buffer Enable register(GPIO_IBE) is used to
- * control the input enable of each individual GPIO port.
- * When an individual GPIO port’s direction is set to
- * input (GPIO_GPDIR[DRn=0]), the associated input enable must be
- * set (GPIOxGPIE[IEn]=1) to propagate the port value to the GPIO
- * Data Register.
- */
-static int ls1028a_gpio_dir_in_init(struct gpio_chip *gc)
-{
-	unsigned long flags;
-	struct mpc8xxx_gpio_chip *mpc8xxx_gc = gpiochip_get_data(gc);
-
-	spin_lock_irqsave(&gc->bgpio_lock, flags);
-
-	gc->write_reg(mpc8xxx_gc->regs + GPIO_IBE, 0xffffffff);
-
-	spin_unlock_irqrestore(&gc->bgpio_lock, flags);
-
-	return 0;
-}
-
 /*
  * This hardware has a big endian bit assignment such that GPIO line 0 is
  * connected to bit 31, line 1 to bit 30 ... line 31 to bit 0.
@@ -283,7 +262,6 @@ static const struct irq_domain_ops mpc8xxx_gpio_irq_ops = {
 };
 
 struct mpc8xxx_gpio_devtype {
-	int (*gpio_dir_in_init)(struct gpio_chip *chip);
 	int (*gpio_dir_out)(struct gpio_chip *, unsigned int, int);
 	int (*gpio_get)(struct gpio_chip *, unsigned int);
 	int (*irq_set_type)(struct irq_data *, unsigned int);
@@ -294,11 +272,6 @@ static const struct mpc8xxx_gpio_devtype mpc512x_gpio_devtype = {
 	.irq_set_type = mpc512x_irq_set_type,
 };
 
-static const struct mpc8xxx_gpio_devtype ls1028a_gpio_devtype = {
-	.gpio_dir_in_init = ls1028a_gpio_dir_in_init,
-	.irq_set_type = mpc8xxx_irq_set_type,
-};
-
 static const struct mpc8xxx_gpio_devtype mpc5125_gpio_devtype = {
 	.gpio_dir_out = mpc5125_gpio_dir_out,
 	.irq_set_type = mpc512x_irq_set_type,
@@ -319,8 +292,8 @@ static const struct of_device_id mpc8xxx_gpio_ids[] = {
 	{ .compatible = "fsl,mpc5121-gpio", .data = &mpc512x_gpio_devtype, },
 	{ .compatible = "fsl,mpc5125-gpio", .data = &mpc5125_gpio_devtype, },
 	{ .compatible = "fsl,pq3-gpio",     },
-	{ .compatible = "fsl,ls1028a-gpio", .data = &ls1028a_gpio_devtype, },
-	{ .compatible = "fsl,ls1088a-gpio", .data = &ls1028a_gpio_devtype, },
+	{ .compatible = "fsl,ls1028a-gpio", },
+	{ .compatible = "fsl,ls1088a-gpio", },
 	{ .compatible = "fsl,qoriq-gpio",   },
 	{}
 };
@@ -389,7 +362,16 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 
 	gc->to_irq = mpc8xxx_gpio_to_irq;
 
-	if (of_device_is_compatible(np, "fsl,qoriq-gpio"))
+	/*
+	 * The GPIO Input Buffer Enable register(GPIO_IBE) is used to control
+	 * the input enable of each individual GPIO port.  When an individual
+	 * GPIO port’s direction is set to input (GPIO_GPDIR[DRn=0]), the
+	 * associated input enable must be set (GPIOxGPIE[IEn]=1) to propagate
+	 * the port value to the GPIO Data Register.
+	 */
+	if (of_device_is_compatible(np, "fsl,qoriq-gpio") ||
+	    of_device_is_compatible(np, "fsl,ls1028a-gpio") ||
+	    of_device_is_compatible(np, "fsl,ls1088a-gpio"))
 		gc->write_reg(mpc8xxx_gc->regs + GPIO_IBE, 0xffffffff);
 
 	ret = gpiochip_add_data(gc, mpc8xxx_gc);
@@ -411,9 +393,6 @@ static int mpc8xxx_probe(struct platform_device *pdev)
 	/* ack and mask all irqs */
 	gc->write_reg(mpc8xxx_gc->regs + GPIO_IER, 0xffffffff);
 	gc->write_reg(mpc8xxx_gc->regs + GPIO_IMR, 0);
-	/* enable input buffer  */
-	if (devtype->gpio_dir_in_init)
-		devtype->gpio_dir_in_init(gc);
 
 	ret = devm_request_irq(&pdev->dev, mpc8xxx_gc->irqn,
 			       mpc8xxx_gpio_irq_cascade,

drivers/gpio/gpiolib-cdev.h

@@ -5,7 +5,22 @@
 
 #include <linux/device.h>
 
+#ifdef CONFIG_GPIO_CDEV
+
 int gpiolib_cdev_register(struct gpio_device *gdev, dev_t devt);
 void gpiolib_cdev_unregister(struct gpio_device *gdev);
 
+#else
+
+static inline int gpiolib_cdev_register(struct gpio_device *gdev, dev_t devt)
+{
+	return 0;
+}
+
+static inline void gpiolib_cdev_unregister(struct gpio_device *gdev)
+{
+}
+
+#endif /* CONFIG_GPIO_CDEV */
+
 #endif /* GPIOLIB_CDEV_H */

drivers/gpio/gpiolib.c

@@ -2092,9 +2092,14 @@ static bool gpiod_free_commit(struct gpio_desc *desc)
 		clear_bit(FLAG_PULL_UP, &desc->flags);
 		clear_bit(FLAG_PULL_DOWN, &desc->flags);
 		clear_bit(FLAG_BIAS_DISABLE, &desc->flags);
+		clear_bit(FLAG_EDGE_RISING, &desc->flags);
+		clear_bit(FLAG_EDGE_FALLING, &desc->flags);
 		clear_bit(FLAG_IS_HOGGED, &desc->flags);
 #ifdef CONFIG_OF_DYNAMIC
 		desc->hog = NULL;
+#endif
+#ifdef CONFIG_GPIO_CDEV
+		WRITE_ONCE(desc->debounce_period_us, 0);
 #endif
 		ret = true;
 	}

drivers/gpio/gpiolib.h

@@ -114,6 +114,8 @@ struct gpio_desc {
 #define FLAG_PULL_UP    13	/* GPIO has pull up enabled */
 #define FLAG_PULL_DOWN  14	/* GPIO has pull down enabled */
 #define FLAG_BIAS_DISABLE    15	/* GPIO has pull disabled */
+#define FLAG_EDGE_RISING     16	/* GPIO CDEV detects rising edge events */
+#define FLAG_EDGE_FALLING    17	/* GPIO CDEV detects falling edge events */
 
 	/* Connection label */
 	const char		*label;
@@ -122,6 +124,10 @@ struct gpio_desc {
 #ifdef CONFIG_OF_DYNAMIC
 	struct device_node	*hog;
 #endif
+#ifdef CONFIG_GPIO_CDEV
+	/* debounce period in microseconds */
+	unsigned int		debounce_period_us;
+#endif
 };
 
 int gpiod_request(struct gpio_desc *desc, const char *label);

include/linux/string_helpers.h

@@ -94,4 +94,6 @@ char *kstrdup_quotable(const char *src, gfp_t gfp);
 char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp);
 char *kstrdup_quotable_file(struct file *file, gfp_t gfp);
 
+void kfree_strarray(char **array, size_t n);
+
 #endif

lib/string_helpers.c

@@ -649,3 +649,26 @@ char *kstrdup_quotable_file(struct file *file, gfp_t gfp)
 	return pathname;
 }
 EXPORT_SYMBOL_GPL(kstrdup_quotable_file);
+
+/**
+ * kfree_strarray - free a number of dynamically allocated strings contained
+ *                  in an array and the array itself
+ *
+ * @array: Dynamically allocated array of strings to free.
+ * @n: Number of strings (starting from the beginning of the array) to free.
+ *
+ * Passing a non-NULL @array and @n == 0 as well as NULL @array are valid
+ * use-cases. If @array is NULL, the function does nothing.
+ */
+void kfree_strarray(char **array, size_t n)
+{
+	unsigned int i;
+
+	if (!array)
+		return;
+
+	for (i = 0; i < n; i++)
+		kfree(array[i]);
+	kfree(array);
+}
+EXPORT_SYMBOL_GPL(kfree_strarray);

tools/gpio/gpio-event-mon.c

@@ -23,17 +23,17 @@
 #include <sys/ioctl.h>
 #include <sys/types.h>
 #include <linux/gpio.h>
+#include "gpio-utils.h"
 
 int monitor_device(const char *device_name,
-		   unsigned int line,
-		   uint32_t handleflags,
-		   uint32_t eventflags,
+		   unsigned int *lines,
+		   unsigned int num_lines,
+		   struct gpio_v2_line_config *config,
 		   unsigned int loops)
 {
-	struct gpioevent_request req;
-	struct gpiohandle_data data;
+	struct gpio_v2_line_values values;
 	char *chrdev_name;
-	int fd;
+	int cfd, lfd;
 	int ret;
 	int i = 0;
 
@@ -41,44 +41,55 @@ int monitor_device(const char *device_name,
 	if (ret < 0)
 		return -ENOMEM;
 
-	fd = open(chrdev_name, 0);
-	if (fd == -1) {
+	cfd = open(chrdev_name, 0);
+	if (cfd == -1) {
 		ret = -errno;
 		fprintf(stderr, "Failed to open %s\n", chrdev_name);
 		goto exit_free_name;
 	}
 
-	req.lineoffset = line;
-	req.handleflags = handleflags;
-	req.eventflags = eventflags;
-	strcpy(req.consumer_label, "gpio-event-mon");
-
-	ret = ioctl(fd, GPIO_GET_LINEEVENT_IOCTL, &req);
-	if (ret == -1) {
-		ret = -errno;
-		fprintf(stderr, "Failed to issue GET EVENT "
-			"IOCTL (%d)\n",
-			ret);
-		goto exit_close_error;
-	}
+	ret = gpiotools_request_line(device_name, lines, num_lines, config,
+				     "gpio-event-mon");
+	if (ret < 0)
+		goto exit_device_close;
+	else
+		lfd = ret;
 
 	/* Read initial states */
-	ret = ioctl(req.fd, GPIOHANDLE_GET_LINE_VALUES_IOCTL, &data);
-	if (ret == -1) {
-		ret = -errno;
-		fprintf(stderr, "Failed to issue GPIOHANDLE GET LINE "
-			"VALUES IOCTL (%d)\n",
+	values.mask = 0;
+	values.bits = 0;
+	for (i = 0; i < num_lines; i++)
+		gpiotools_set_bit(&values.mask, i);
+	ret = gpiotools_get_values(lfd, &values);
+	if (ret < 0) {
+		fprintf(stderr,
+			"Failed to issue GPIO LINE GET VALUES IOCTL (%d)\n",
 			ret);
-		goto exit_close_error;
+		goto exit_line_close;
 	}
 
-	fprintf(stdout, "Monitoring line %d on %s\n", line, device_name);
-	fprintf(stdout, "Initial line value: %d\n", data.values[0]);
+	if (num_lines == 1) {
+		fprintf(stdout, "Monitoring line %d on %s\n", lines[0], device_name);
+		fprintf(stdout, "Initial line value: %d\n",
+			gpiotools_test_bit(values.bits, 0));
+	} else {
+		fprintf(stdout, "Monitoring lines %d", lines[0]);
+		for (i = 1; i < num_lines - 1; i++)
+			fprintf(stdout, ", %d", lines[i]);
+		fprintf(stdout, " and %d on %s\n", lines[i], device_name);
+		fprintf(stdout, "Initial line values: %d",
+			gpiotools_test_bit(values.bits, 0));
+		for (i = 1; i < num_lines - 1; i++)
+			fprintf(stdout, ", %d",
+				gpiotools_test_bit(values.bits, i));
+		fprintf(stdout, " and %d\n",
+			gpiotools_test_bit(values.bits, i));
+	}
 
 	while (1) {
-		struct gpioevent_data event;
+		struct gpio_v2_line_event event;
 
-		ret = read(req.fd, &event, sizeof(event));
+		ret = read(lfd, &event, sizeof(event));
 		if (ret == -1) {
 			if (errno == -EAGAIN) {
 				fprintf(stderr, "nothing available\n");
@@ -96,12 +107,14 @@ int monitor_device(const char *device_name,
 			ret = -EIO;
 			break;
 		}
-		fprintf(stdout, "GPIO EVENT %llu: ", event.timestamp);
+		fprintf(stdout, "GPIO EVENT at %llu on line %d (%d|%d) ",
+			event.timestamp_ns, event.offset, event.line_seqno,
+			event.seqno);
 		switch (event.id) {
-		case GPIOEVENT_EVENT_RISING_EDGE:
+		case GPIO_V2_LINE_EVENT_RISING_EDGE:
 			fprintf(stdout, "rising edge");
 			break;
-		case GPIOEVENT_EVENT_FALLING_EDGE:
+		case GPIO_V2_LINE_EVENT_FALLING_EDGE:
 			fprintf(stdout, "falling edge");
 			break;
 		default:
@@ -114,8 +127,11 @@ int monitor_device(const char *device_name,
 			break;
 	}
 
-exit_close_error:
-	if (close(fd) == -1)
+exit_line_close:
+	if (close(lfd) == -1)
+		perror("Failed to close line file");
+exit_device_close:
+	if (close(cfd) == -1)
 		perror("Failed to close GPIO character device file");
 exit_free_name:
 	free(chrdev_name);
@@ -127,29 +143,37 @@ void print_usage(void)
 	fprintf(stderr, "Usage: gpio-event-mon [options]...\n"
 		"Listen to events on GPIO lines, 0->1 1->0\n"
 		"  -n <name>  Listen on GPIOs on a named device (must be stated)\n"
-		"  -o <n>     Offset to monitor\n"
+		"  -o <n>     Offset of line to monitor (may be repeated)\n"
 		"  -d         Set line as open drain\n"
 		"  -s         Set line as open source\n"
 		"  -r         Listen for rising edges\n"
 		"  -f         Listen for falling edges\n"
+		"  -b <n>     Debounce the line with period n microseconds\n"
 		" [-c <n>]    Do <n> loops (optional, infinite loop if not stated)\n"
 		"  -?         This helptext\n"
 		"\n"
 		"Example:\n"
-		"gpio-event-mon -n gpiochip0 -o 4 -r -f\n"
+		"gpio-event-mon -n gpiochip0 -o 4 -r -f -b 10000\n"
 	);
 }
 
+#define EDGE_FLAGS \
+	(GPIO_V2_LINE_FLAG_EDGE_RISING | \
+	 GPIO_V2_LINE_FLAG_EDGE_FALLING)
+
 int main(int argc, char **argv)
 {
 	const char *device_name = NULL;
-	unsigned int line = -1;
+	unsigned int lines[GPIO_V2_LINES_MAX];
+	unsigned int num_lines = 0;
 	unsigned int loops = 0;
-	uint32_t handleflags = GPIOHANDLE_REQUEST_INPUT;
-	uint32_t eventflags = 0;
-	int c;
+	struct gpio_v2_line_config config;
+	int c, attr, i;
+	unsigned long debounce_period_us = 0;
 
-	while ((c = getopt(argc, argv, "c:n:o:dsrf?")) != -1) {
+	memset(&config, 0, sizeof(config));
+	config.flags = GPIO_V2_LINE_FLAG_INPUT;
+	while ((c = getopt(argc, argv, "c:n:o:b:dsrf?")) != -1) {
 		switch (c) {
 		case 'c':
 			loops = strtoul(optarg, NULL, 10);
@@ -158,19 +182,27 @@ int main(int argc, char **argv)
 			device_name = optarg;
 			break;
 		case 'o':
-			line = strtoul(optarg, NULL, 10);
+			if (num_lines >= GPIO_V2_LINES_MAX) {
+				print_usage();
+				return -1;
+			}
+			lines[num_lines] = strtoul(optarg, NULL, 10);
+			num_lines++;
+			break;
+		case 'b':
+			debounce_period_us = strtoul(optarg, NULL, 10);
 			break;
 		case 'd':
-			handleflags |= GPIOHANDLE_REQUEST_OPEN_DRAIN;
+			config.flags |= GPIO_V2_LINE_FLAG_OPEN_DRAIN;
 			break;
 		case 's':
-			handleflags |= GPIOHANDLE_REQUEST_OPEN_SOURCE;
+			config.flags |= GPIO_V2_LINE_FLAG_OPEN_SOURCE;
 			break;
 		case 'r':
-			eventflags |= GPIOEVENT_REQUEST_RISING_EDGE;
+			config.flags |= GPIO_V2_LINE_FLAG_EDGE_RISING;
 			break;
 		case 'f':
-			eventflags |= GPIOEVENT_REQUEST_FALLING_EDGE;
+			config.flags |= GPIO_V2_LINE_FLAG_EDGE_FALLING;
 			break;
 		case '?':
 			print_usage();
@@ -178,15 +210,23 @@ int main(int argc, char **argv)
 		}
 	}
 
-	if (!device_name || line == -1) {
+	if (debounce_period_us) {
+		attr = config.num_attrs;
+		config.num_attrs++;
+		for (i = 0; i < num_lines; i++)
+			gpiotools_set_bit(&config.attrs[attr].mask, i);
+		config.attrs[attr].attr.id = GPIO_V2_LINE_ATTR_ID_DEBOUNCE;
+		config.attrs[attr].attr.debounce_period_us = debounce_period_us;
+	}
+
+	if (!device_name || num_lines == 0) {
 		print_usage();
 		return -1;
 	}
-	if (!eventflags) {
+	if (!(config.flags & EDGE_FLAGS)) {
 		printf("No flags specified, listening on both rising and "
 		       "falling edges\n");
-		eventflags = GPIOEVENT_REQUEST_BOTH_EDGES;
+		config.flags |= EDGE_FLAGS;
 	}
-	return monitor_device(device_name, line, handleflags,
-			      eventflags, loops);
+	return monitor_device(device_name, lines, num_lines, &config, loops);
 }

tools/gpio/gpio-hammer.c

@@ -22,39 +22,46 @@
 #include <linux/gpio.h>
 #include "gpio-utils.h"
 
-int hammer_device(const char *device_name, unsigned int *lines, int nlines,
+int hammer_device(const char *device_name, unsigned int *lines, int num_lines,
 		  unsigned int loops)
 {
-	struct gpiohandle_data data;
+	struct gpio_v2_line_values values;
+	struct gpio_v2_line_config config;
 	char swirr[] = "-\\|/";
 	int fd;
 	int ret;
 	int i, j;
 	unsigned int iteration = 0;
 
-	memset(&data.values, 0, sizeof(data.values));
-	ret = gpiotools_request_linehandle(device_name, lines, nlines,
-					   GPIOHANDLE_REQUEST_OUTPUT, &data,
-					   "gpio-hammer");
+	memset(&config, 0, sizeof(config));
+	config.flags = GPIO_V2_LINE_FLAG_OUTPUT;
+
+	ret = gpiotools_request_line(device_name, lines, num_lines,
+				     &config, "gpio-hammer");
 	if (ret < 0)
 		goto exit_error;
 	else
 		fd = ret;
 
-	ret = gpiotools_get_values(fd, &data);
+	values.mask = 0;
+	values.bits = 0;
+	for (i = 0; i < num_lines; i++)
+		gpiotools_set_bit(&values.mask, i);
+
+	ret = gpiotools_get_values(fd, &values);
 	if (ret < 0)
 		goto exit_close_error;
 
 	fprintf(stdout, "Hammer lines [");
-	for (i = 0; i < nlines; i++) {
+	for (i = 0; i < num_lines; i++) {
 		fprintf(stdout, "%d", lines[i]);
-		if (i != (nlines - 1))
+		if (i != (num_lines - 1))
 			fprintf(stdout, ", ");
 	}
 	fprintf(stdout, "] on %s, initial states: [", device_name);
-	for (i = 0; i < nlines; i++) {
-		fprintf(stdout, "%d", data.values[i]);
-		if (i != (nlines - 1))
+	for (i = 0; i < num_lines; i++) {
+		fprintf(stdout, "%d", gpiotools_test_bit(values.bits, i));
+		if (i != (num_lines - 1))
 			fprintf(stdout, ", ");
 	}
 	fprintf(stdout, "]\n");
@@ -63,15 +70,15 @@ int hammer_device(const char *device_name, unsigned int *lines, int nlines,
 	j = 0;
 	while (1) {
 		/* Invert all lines so we blink */
-		for (i = 0; i < nlines; i++)
-			data.values[i] = !data.values[i];
+		for (i = 0; i < num_lines; i++)
+			gpiotools_change_bit(&values.bits, i);
 
-		ret = gpiotools_set_values(fd, &data);
+		ret = gpiotools_set_values(fd, &values);
 		if (ret < 0)
 			goto exit_close_error;
 
 		/* Re-read values to get status */
-		ret = gpiotools_get_values(fd, &data);
+		ret = gpiotools_get_values(fd, &values);
 		if (ret < 0)
 			goto exit_close_error;
 
@@ -81,9 +88,10 @@ int hammer_device(const char *device_name, unsigned int *lines, int nlines,
 			j = 0;
 
 		fprintf(stdout, "[");
-		for (i = 0; i < nlines; i++) {
-			fprintf(stdout, "%d: %d", lines[i], data.values[i]);
-			if (i != (nlines - 1))
+		for (i = 0; i < num_lines; i++) {
+			fprintf(stdout, "%d: %d", lines[i],
+				gpiotools_test_bit(values.bits, i));
+			if (i != (num_lines - 1))
 				fprintf(stdout, ", ");
 		}
 		fprintf(stdout, "]\r");
@@ -97,7 +105,7 @@ int hammer_device(const char *device_name, unsigned int *lines, int nlines,
 	ret = 0;
 
 exit_close_error:
-	gpiotools_release_linehandle(fd);
+	gpiotools_release_line(fd);
 exit_error:
 	return ret;
 }
@@ -121,7 +129,7 @@ int main(int argc, char **argv)
 	const char *device_name = NULL;
 	unsigned int lines[GPIOHANDLES_MAX];
 	unsigned int loops = 0;
-	int nlines;
+	int num_lines;
 	int c;
 	int i;
 
@@ -158,11 +166,11 @@ int main(int argc, char **argv)
 		return -1;
 	}
 
-	nlines = i;
+	num_lines = i;
 
-	if (!device_name || !nlines) {
+	if (!device_name || !num_lines) {
 		print_usage();
 		return -1;
 	}
-	return hammer_device(device_name, lines, nlines, loops);
+	return hammer_device(device_name, lines, num_lines, loops);
 }

tools/gpio/gpio-utils.c

@@ -38,7 +38,7 @@
  *			such as "gpiochip0"
  * @lines:		An array desired lines, specified by offset
  *			index for the associated GPIO device.
- * @nline:		The number of lines to request.
+ * @num_lines:		The number of lines to request.
  * @flag:		The new flag for requsted gpio. Reference
  *			"linux/gpio.h" for the meaning of flag.
  * @data:		Default value will be set to gpio when flag is
@@ -56,7 +56,7 @@
  *			On failure return the errno.
  */
 int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
-				 unsigned int nlines, unsigned int flag,
+				 unsigned int num_lines, unsigned int flag,
 				 struct gpiohandle_data *data,
 				 const char *consumer_label)
 {
@@ -78,12 +78,12 @@ int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
 		goto exit_free_name;
 	}
 
-	for (i = 0; i < nlines; i++)
+	for (i = 0; i < num_lines; i++)
 		req.lineoffsets[i] = lines[i];
 
 	req.flags = flag;
 	strcpy(req.consumer_label, consumer_label);
-	req.lines = nlines;
+	req.lines = num_lines;
 	if (flag & GPIOHANDLE_REQUEST_OUTPUT)
 		memcpy(req.default_values, data, sizeof(req.default_values));
 
@@ -100,20 +100,87 @@ int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
 	free(chrdev_name);
 	return ret < 0 ? ret : req.fd;
 }
+
+/**
+ * gpiotools_request_line() - request gpio lines in a gpiochip
+ * @device_name:	The name of gpiochip without prefix "/dev/",
+ *			such as "gpiochip0"
+ * @lines:		An array desired lines, specified by offset
+ *			index for the associated GPIO device.
+ * @num_lines:		The number of lines to request.
+ * @config:		The new config for requested gpio. Reference
+ *			"linux/gpio.h" for config details.
+ * @consumer:		The name of consumer, such as "sysfs",
+ *			"powerkey". This is useful for other users to
+ *			know who is using.
+ *
+ * Request gpio lines through the ioctl provided by chardev. User
+ * could call gpiotools_set_values() and gpiotools_get_values() to
+ * read and write respectively through the returned fd. Call
+ * gpiotools_release_line() to release these lines after that.
+ *
+ * Return:		On success return the fd;
+ *			On failure return the errno.
+ */
+int gpiotools_request_line(const char *device_name, unsigned int *lines,
+			   unsigned int num_lines,
+			   struct gpio_v2_line_config *config,
+			   const char *consumer)
+{
+	struct gpio_v2_line_request req;
+	char *chrdev_name;
+	int fd;
+	int i;
+	int ret;
+
+	ret = asprintf(&chrdev_name, "/dev/%s", device_name);
+	if (ret < 0)
+		return -ENOMEM;
+
+	fd = open(chrdev_name, 0);
+	if (fd == -1) {
+		ret = -errno;
+		fprintf(stderr, "Failed to open %s, %s\n",
+			chrdev_name, strerror(errno));
+		goto exit_free_name;
+	}
+
+	memset(&req, 0, sizeof(req));
+	for (i = 0; i < num_lines; i++)
+		req.offsets[i] = lines[i];
+
+	req.config = *config;
+	strcpy(req.consumer, consumer);
+	req.num_lines = num_lines;
+
+	ret = ioctl(fd, GPIO_V2_GET_LINE_IOCTL, &req);
+	if (ret == -1) {
+		ret = -errno;
+		fprintf(stderr, "Failed to issue %s (%d), %s\n",
+			"GPIO_GET_LINE_IOCTL", ret, strerror(errno));
+	}
+
+	if (close(fd) == -1)
+		perror("Failed to close GPIO character device file");
+exit_free_name:
+	free(chrdev_name);
+	return ret < 0 ? ret : req.fd;
+}
+
 /**
  * gpiotools_set_values(): Set the value of gpio(s)
  * @fd:			The fd returned by
- *			gpiotools_request_linehandle().
- * @data:		The array of values want to set.
+ *			gpiotools_request_line().
+ * @values:		The array of values want to set.
  *
  * Return:		On success return 0;
  *			On failure return the errno.
  */
-int gpiotools_set_values(const int fd, struct gpiohandle_data *data)
+int gpiotools_set_values(const int fd, struct gpio_v2_line_values *values)
 {
 	int ret;
 
-	ret = ioctl(fd, GPIOHANDLE_SET_LINE_VALUES_IOCTL, data);
+	ret = ioctl(fd, GPIO_V2_LINE_SET_VALUES_IOCTL, values);
 	if (ret == -1) {
 		ret = -errno;
 		fprintf(stderr, "Failed to issue %s (%d), %s\n",
@@ -127,17 +194,17 @@ int gpiotools_set_values(const int fd, struct gpiohandle_data *data)
 /**
  * gpiotools_get_values(): Get the value of gpio(s)
  * @fd:			The fd returned by
- *			gpiotools_request_linehandle().
- * @data:		The array of values get from hardware.
+ *			gpiotools_request_line().
+ * @values:		The array of values get from hardware.
  *
  * Return:		On success return 0;
  *			On failure return the errno.
  */
-int gpiotools_get_values(const int fd, struct gpiohandle_data *data)
+int gpiotools_get_values(const int fd, struct gpio_v2_line_values *values)
 {
 	int ret;
 
-	ret = ioctl(fd, GPIOHANDLE_GET_LINE_VALUES_IOCTL, data);
+	ret = ioctl(fd, GPIO_V2_LINE_GET_VALUES_IOCTL, values);
 	if (ret == -1) {
 		ret = -errno;
 		fprintf(stderr, "Failed to issue %s (%d), %s\n",
@@ -169,6 +236,27 @@ int gpiotools_release_linehandle(const int fd)
 	return ret;
 }
 
+/**
+ * gpiotools_release_line(): Release the line(s) of gpiochip
+ * @fd:			The fd returned by
+ *			gpiotools_request_line().
+ *
+ * Return:		On success return 0;
+ *			On failure return the errno.
+ */
+int gpiotools_release_line(const int fd)
+{
+	int ret;
+
+	ret = close(fd);
+	if (ret == -1) {
+		perror("Failed to close GPIO LINE device file");
+		ret = -errno;
+	}
+
+	return ret;
+}
+
 /**
  * gpiotools_get(): Get value from specific line
  * @device_name:	The name of gpiochip without prefix "/dev/",
@@ -180,11 +268,14 @@ int gpiotools_release_linehandle(const int fd)
  */
 int gpiotools_get(const char *device_name, unsigned int line)
 {
-	struct gpiohandle_data data;
+	int ret;
+	unsigned int value;
 	unsigned int lines[] = {line};
 
-	gpiotools_gets(device_name, lines, 1, &data);
-	return data.values[0];
+	ret = gpiotools_gets(device_name, lines, 1, &value);
+	if (ret)
+		return ret;
+	return value;
 }
 
 
@@ -194,28 +285,36 @@ int gpiotools_get(const char *device_name, unsigned int line)
  *			such as "gpiochip0".
  * @lines:		An array desired lines, specified by offset
  *			index for the associated GPIO device.
- * @nline:		The number of lines to request.
- * @data:		The array of values get from gpiochip.
+ * @num_lines:		The number of lines to request.
+ * @values:		The array of values get from gpiochip.
  *
  * Return:		On success return 0;
  *			On failure return the errno.
  */
 int gpiotools_gets(const char *device_name, unsigned int *lines,
-		   unsigned int nlines, struct gpiohandle_data *data)
+		   unsigned int num_lines, unsigned int *values)
 {
-	int fd;
+	int fd, i;
 	int ret;
 	int ret_close;
+	struct gpio_v2_line_config config;
+	struct gpio_v2_line_values lv;
 
-	ret = gpiotools_request_linehandle(device_name, lines, nlines,
-					   GPIOHANDLE_REQUEST_INPUT, data,
-					   CONSUMER);
+	memset(&config, 0, sizeof(config));
+	config.flags = GPIO_V2_LINE_FLAG_INPUT;
+	ret = gpiotools_request_line(device_name, lines, num_lines,
+				     &config, CONSUMER);
 	if (ret < 0)
 		return ret;
 
 	fd = ret;
-	ret = gpiotools_get_values(fd, data);
-	ret_close = gpiotools_release_linehandle(fd);
+	for (i = 0; i < num_lines; i++)
+		gpiotools_set_bit(&lv.mask, i);
+	ret = gpiotools_get_values(fd, &lv);
+	if (!ret)
+		for (i = 0; i < num_lines; i++)
+			values[i] = gpiotools_test_bit(lv.bits, i);
+	ret_close = gpiotools_release_line(fd);
 	return ret < 0 ? ret : ret_close;
 }
 
@@ -232,11 +331,9 @@ int gpiotools_gets(const char *device_name, unsigned int *lines,
 int gpiotools_set(const char *device_name, unsigned int line,
 		  unsigned int value)
 {
-	struct gpiohandle_data data;
 	unsigned int lines[] = {line};
 
-	data.values[0] = value;
-	return gpiotools_sets(device_name, lines, 1, &data);
+	return gpiotools_sets(device_name, lines, 1, &value);
 }
 
 /**
@@ -245,23 +342,32 @@ int gpiotools_set(const char *device_name, unsigned int line,
  *			such as "gpiochip0".
  * @lines:		An array desired lines, specified by offset
  *			index for the associated GPIO device.
- * @nline:		The number of lines to request.
- * @data:		The array of values set to gpiochip, must be
+ * @num_lines:		The number of lines to request.
+ * @value:		The array of values set to gpiochip, must be
  *			0(low) or 1(high).
  *
  * Return:		On success return 0;
  *			On failure return the errno.
  */
 int gpiotools_sets(const char *device_name, unsigned int *lines,
-		   unsigned int nlines, struct gpiohandle_data *data)
+		   unsigned int num_lines, unsigned int *values)
 {
-	int ret;
+	int ret, i;
+	struct gpio_v2_line_config config;
 
-	ret = gpiotools_request_linehandle(device_name, lines, nlines,
-					   GPIOHANDLE_REQUEST_OUTPUT, data,
-					   CONSUMER);
+	memset(&config, 0, sizeof(config));
+	config.flags = GPIO_V2_LINE_FLAG_OUTPUT;
+	config.num_attrs = 1;
+	config.attrs[0].attr.id = GPIO_V2_LINE_ATTR_ID_OUTPUT_VALUES;
+	for (i = 0; i < num_lines; i++) {
+		gpiotools_set_bit(&config.attrs[0].mask, i);
+		gpiotools_assign_bit(&config.attrs[0].attr.values,
+				     i, values[i]);
+	}
+	ret = gpiotools_request_line(device_name, lines, num_lines,
+				     &config, CONSUMER);
 	if (ret < 0)
 		return ret;
 
-	return gpiotools_release_linehandle(ret);
+	return gpiotools_release_line(ret);
 }

tools/gpio/gpio-utils.h

@@ -12,7 +12,9 @@
 #ifndef _GPIO_UTILS_H_
 #define _GPIO_UTILS_H_
 
+#include <stdbool.h>
 #include <string.h>
+#include <linux/types.h>
 
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
 
@@ -23,19 +25,55 @@ static inline int check_prefix(const char *str, const char *prefix)
 }
 
 int gpiotools_request_linehandle(const char *device_name, unsigned int *lines,
-				 unsigned int nlines, unsigned int flag,
+				 unsigned int num_lines, unsigned int flag,
 				 struct gpiohandle_data *data,
 				 const char *consumer_label);
-int gpiotools_set_values(const int fd, struct gpiohandle_data *data);
-int gpiotools_get_values(const int fd, struct gpiohandle_data *data);
 int gpiotools_release_linehandle(const int fd);
 
+int gpiotools_request_line(const char *device_name,
+			   unsigned int *lines,
+			   unsigned int num_lines,
+			   struct gpio_v2_line_config *config,
+			   const char *consumer);
+int gpiotools_set_values(const int fd, struct gpio_v2_line_values *values);
+int gpiotools_get_values(const int fd, struct gpio_v2_line_values *values);
+int gpiotools_release_line(const int fd);
+
 int gpiotools_get(const char *device_name, unsigned int line);
 int gpiotools_gets(const char *device_name, unsigned int *lines,
-		   unsigned int nlines, struct gpiohandle_data *data);
+		   unsigned int num_lines, unsigned int *values);
 int gpiotools_set(const char *device_name, unsigned int line,
 		  unsigned int value);
 int gpiotools_sets(const char *device_name, unsigned int *lines,
-		   unsigned int nlines, struct gpiohandle_data *data);
+		   unsigned int num_lines, unsigned int *values);
+
+/* helper functions for gpio_v2_line_values bits */
+static inline void gpiotools_set_bit(__u64 *b, int n)
+{
+	*b |= _BITULL(n);
+}
+
+static inline void gpiotools_change_bit(__u64 *b, int n)
+{
+	*b ^= _BITULL(n);
+}
+
+static inline void gpiotools_clear_bit(__u64 *b, int n)
+{
+	*b &= ~_BITULL(n);
+}
+
+static inline int gpiotools_test_bit(__u64 b, int n)
+{
+	return !!(b & _BITULL(n));
+}
+
+static inline void gpiotools_assign_bit(__u64 *b, int n, bool value)
+{
+	if (value)
+		gpiotools_set_bit(b, n);
+	else
+		gpiotools_clear_bit(b, n);
+}
 
 #endif /* _GPIO_UTILS_H_ */

tools/gpio/gpio-watch.c

@@ -21,8 +21,8 @@
 
 int main(int argc, char **argv)
 {
-	struct gpioline_info_changed chg;
-	struct gpioline_info req;
+	struct gpio_v2_line_info_changed chg;
+	struct gpio_v2_line_info req;
 	struct pollfd pfd;
 	int fd, i, j, ret;
 	char *event, *end;
@@ -40,11 +40,11 @@ int main(int argc, char **argv)
 	for (i = 0, j = 2; i < argc - 2; i++, j++) {
 		memset(&req, 0, sizeof(req));
 
-		req.line_offset = strtoul(argv[j], &end, 0);
+		req.offset = strtoul(argv[j], &end, 0);
 		if (*end != '\0')
 			goto err_usage;
 
-		ret = ioctl(fd, GPIO_GET_LINEINFO_WATCH_IOCTL, &req);
+		ret = ioctl(fd, GPIO_V2_GET_LINEINFO_WATCH_IOCTL, &req);
 		if (ret) {
 			perror("unable to set up line watch");
 			return EXIT_FAILURE;
@@ -71,13 +71,13 @@ int main(int argc, char **argv)
 			}
 
 			switch (chg.event_type) {
-			case GPIOLINE_CHANGED_REQUESTED:
+			case GPIO_V2_LINE_CHANGED_REQUESTED:
 				event = "requested";
 				break;
-			case GPIOLINE_CHANGED_RELEASED:
+			case GPIO_V2_LINE_CHANGED_RELEASED:
 				event = "released";
 				break;
-			case GPIOLINE_CHANGED_CONFIG:
+			case GPIO_V2_LINE_CHANGED_CONFIG:
 				event = "config changed";
 				break;
 			default:
@@ -87,7 +87,7 @@ int main(int argc, char **argv)
 			}
 
 			printf("line %u: %s at %llu\n",
-			       chg.info.line_offset, event, chg.timestamp);
+			       chg.info.offset, event, chg.timestamp_ns);
 		}
 	}
 

tools/gpio/lsgpio.c

@@ -25,57 +25,73 @@
 
 struct gpio_flag {
 	char *name;
-	unsigned long mask;
+	unsigned long long mask;
 };
 
 struct gpio_flag flagnames[] = {
 	{
-		.name = "kernel",
-		.mask = GPIOLINE_FLAG_KERNEL,
+		.name = "used",
+		.mask = GPIO_V2_LINE_FLAG_USED,
+	},
+	{
+		.name = "input",
+		.mask = GPIO_V2_LINE_FLAG_INPUT,
 	},
 	{
 		.name = "output",
-		.mask = GPIOLINE_FLAG_IS_OUT,
+		.mask = GPIO_V2_LINE_FLAG_OUTPUT,
 	},
 	{
 		.name = "active-low",
-		.mask = GPIOLINE_FLAG_ACTIVE_LOW,
+		.mask = GPIO_V2_LINE_FLAG_ACTIVE_LOW,
 	},
 	{
 		.name = "open-drain",
-		.mask = GPIOLINE_FLAG_OPEN_DRAIN,
+		.mask = GPIO_V2_LINE_FLAG_OPEN_DRAIN,
 	},
 	{
 		.name = "open-source",
-		.mask = GPIOLINE_FLAG_OPEN_SOURCE,
+		.mask = GPIO_V2_LINE_FLAG_OPEN_SOURCE,
 	},
 	{
 		.name = "pull-up",
-		.mask = GPIOLINE_FLAG_BIAS_PULL_UP,
+		.mask = GPIO_V2_LINE_FLAG_BIAS_PULL_UP,
 	},
 	{
 		.name = "pull-down",
-		.mask = GPIOLINE_FLAG_BIAS_PULL_DOWN,
+		.mask = GPIO_V2_LINE_FLAG_BIAS_PULL_DOWN,
 	},
 	{
 		.name = "bias-disabled",
-		.mask = GPIOLINE_FLAG_BIAS_DISABLE,
+		.mask = GPIO_V2_LINE_FLAG_BIAS_DISABLED,
 	},
 };
 
-void print_flags(unsigned long flags)
+static void print_attributes(struct gpio_v2_line_info *info)
 {
 	int i;
-	int printed = 0;
+	const char *field_format = "%s";
 
 	for (i = 0; i < ARRAY_SIZE(flagnames); i++) {
-		if (flags & flagnames[i].mask) {
-			if (printed)
-				fprintf(stdout, " ");
-			fprintf(stdout, "%s", flagnames[i].name);
-			printed++;
+		if (info->flags & flagnames[i].mask) {
+			fprintf(stdout, field_format, flagnames[i].name);
+			field_format = ", %s";
 		}
 	}
+
+	if ((info->flags & GPIO_V2_LINE_FLAG_EDGE_RISING) &&
+	    (info->flags & GPIO_V2_LINE_FLAG_EDGE_FALLING))
+		fprintf(stdout, field_format, "both-edges");
+	else if (info->flags & GPIO_V2_LINE_FLAG_EDGE_RISING)
+		fprintf(stdout, field_format, "rising-edge");
+	else if (info->flags & GPIO_V2_LINE_FLAG_EDGE_FALLING)
+		fprintf(stdout, field_format, "falling-edge");
+
+	for (i = 0; i < info->num_attrs; i++) {
+		if (info->attrs[i].id == GPIO_V2_LINE_ATTR_ID_DEBOUNCE)
+			fprintf(stdout, ", debounce_period=%dusec",
+				info->attrs[0].debounce_period_us);
+	}
 }
 
 int list_device(const char *device_name)
@@ -109,18 +125,18 @@ int list_device(const char *device_name)
 
 	/* Loop over the lines and print info */
 	for (i = 0; i < cinfo.lines; i++) {
-		struct gpioline_info linfo;
+		struct gpio_v2_line_info linfo;
 
 		memset(&linfo, 0, sizeof(linfo));
-		linfo.line_offset = i;
+		linfo.offset = i;
 
-		ret = ioctl(fd, GPIO_GET_LINEINFO_IOCTL, &linfo);
+		ret = ioctl(fd, GPIO_V2_GET_LINEINFO_IOCTL, &linfo);
 		if (ret == -1) {
 			ret = -errno;
 			perror("Failed to issue LINEINFO IOCTL\n");
 			goto exit_close_error;
 		}
-		fprintf(stdout, "\tline %2d:", linfo.line_offset);
+		fprintf(stdout, "\tline %2d:", linfo.offset);
 		if (linfo.name[0])
 			fprintf(stdout, " \"%s\"", linfo.name);
 		else
@@ -131,7 +147,7 @@ int list_device(const char *device_name)
 			fprintf(stdout, " unused");
 		if (linfo.flags) {
 			fprintf(stdout, " [");
-			print_flags(linfo.flags);
+			print_attributes(&linfo);
 			fprintf(stdout, "]");
 		}
 		fprintf(stdout, "\n");