#include <linux/idr.h>
#include <linux/slab.h>
+#define CREATE_TRACE_POINTS
+#include <trace/events/gpio.h>
/* Optional implementation infrastructure for GPIO interfaces.
*
}
static DEVICE_ATTR(ngpio, 0444, chip_ngpio_show, NULL);
-static const struct attribute *gpiochip_attrs[] = {
+static struct attribute *gpiochip_attrs[] = {
&dev_attr_base.attr,
&dev_attr_label.attr,
&dev_attr_ngpio.attr,
NULL,
};
-
-static const struct attribute_group gpiochip_attr_group = {
- .attrs = (struct attribute **) gpiochip_attrs,
-};
+ATTRIBUTE_GROUPS(gpiochip);
/*
* /sys/class/gpio/export ... write-only
/* use chip->base for the ID; it's already known to be unique */
mutex_lock(&sysfs_lock);
- dev = device_create(&gpio_class, chip->dev, MKDEV(0, 0), chip,
- "gpiochip%d", chip->base);
- if (!IS_ERR(dev)) {
- status = sysfs_create_group(&dev->kobj,
- &gpiochip_attr_group);
- } else
+ dev = device_create_with_groups(&gpio_class, chip->dev, MKDEV(0, 0),
+ chip, gpiochip_groups,
+ "gpiochip%d", chip->base);
+ if (IS_ERR(dev))
status = PTR_ERR(dev);
+ else
+ status = 0;
chip->exported = (status == 0);
mutex_unlock(&sysfs_lock);
? (1 << FLAG_IS_OUT)
: 0;
}
- }
- of_gpiochip_add(chip);
+ of_gpiochip_add(chip);
+ }
unlock:
spin_unlock_irqrestore(&gpio_lock, flags);
goto fail;
status = gpiochip_export(chip);
- if (status)
+ if (status) {
+ of_gpiochip_remove(chip);
goto fail;
+ }
return 0;
fail:
return chip;
}
+EXPORT_SYMBOL_GPL(gpiochip_find);
/* These "optional" allocation calls help prevent drivers from stomping
* on each other, and help provide better diagnostics in debugfs.
* @array: array of the 'struct gpio'
* @num: how many GPIOs in the array
*/
-int gpio_request_array(struct gpio *array, size_t num)
+int gpio_request_array(const struct gpio *array, size_t num)
{
int i, err;
* @array: array of the 'struct gpio'
* @num: how many GPIOs in the array
*/
-void gpio_free_array(struct gpio *array, size_t num)
+void gpio_free_array(const struct gpio *array, size_t num)
{
while (num--)
gpio_free((array++)->gpio);
status = chip->direction_input(chip, gpio);
if (status == 0)
clear_bit(FLAG_IS_OUT, &desc->flags);
+
+ trace_gpio_direction(chip->base + gpio, 1, status);
lose:
return status;
fail:
status = chip->direction_output(chip, gpio, value);
if (status == 0)
set_bit(FLAG_IS_OUT, &desc->flags);
+ trace_gpio_value(chip->base + gpio, 0, value);
+ trace_gpio_direction(chip->base + gpio, 0, status);
lose:
return status;
fail:
int __gpio_get_value(unsigned gpio)
{
struct gpio_chip *chip;
+ int value;
chip = gpio_to_chip(gpio);
WARN_ON(chip->can_sleep);
- return chip->get ? chip->get(chip, gpio - chip->base) : 0;
+ value = chip->get ? chip->get(chip, gpio - chip->base) : 0;
+ trace_gpio_value(gpio, 1, value);
+ return value;
}
EXPORT_SYMBOL_GPL(__gpio_get_value);
chip = gpio_to_chip(gpio);
WARN_ON(chip->can_sleep);
+ trace_gpio_value(gpio, 0, value);
chip->set(chip, gpio - chip->base, value);
}
EXPORT_SYMBOL_GPL(__gpio_set_value);
int gpio_get_value_cansleep(unsigned gpio)
{
struct gpio_chip *chip;
+ int value;
might_sleep_if(extra_checks);
chip = gpio_to_chip(gpio);
- return chip->get ? chip->get(chip, gpio - chip->base) : 0;
+ value = chip->get ? chip->get(chip, gpio - chip->base) : 0;
+ trace_gpio_value(gpio, 1, value);
+ return value;
}
EXPORT_SYMBOL_GPL(gpio_get_value_cansleep);
might_sleep_if(extra_checks);
chip = gpio_to_chip(gpio);
+ trace_gpio_value(gpio, 0, value);
chip->set(chip, gpio - chip->base, value);
}
EXPORT_SYMBOL_GPL(gpio_set_value_cansleep);
chip->get
? (chip->get(chip, i) ? "hi" : "lo")
: "? ");
-
- if (!is_out) {
- int irq = gpio_to_irq(gpio);
- struct irq_desc *desc = irq_to_desc(irq);
-
- /* This races with request_irq(), set_irq_type(),
- * and set_irq_wake() ... but those are "rare".
- *
- * More significantly, trigger type flags aren't
- * currently maintained by genirq.
- */
- if (irq >= 0 && desc->action) {
- char *trigger;
-
- switch (desc->status & IRQ_TYPE_SENSE_MASK) {
- case IRQ_TYPE_NONE:
- trigger = "(default)";
- break;
- case IRQ_TYPE_EDGE_FALLING:
- trigger = "edge-falling";
- break;
- case IRQ_TYPE_EDGE_RISING:
- trigger = "edge-rising";
- break;
- case IRQ_TYPE_EDGE_BOTH:
- trigger = "edge-both";
- break;
- case IRQ_TYPE_LEVEL_HIGH:
- trigger = "level-high";
- break;
- case IRQ_TYPE_LEVEL_LOW:
- trigger = "level-low";
- break;
- default:
- trigger = "?trigger?";
- break;
- }
-
- seq_printf(s, " irq-%d %s%s",
- irq, trigger,
- (desc->status & IRQ_WAKEUP)
- ? " wakeup" : "");
- }
- }
-
seq_printf(s, "\n");
}
}