D50869.id157986.diff
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D50869.id157986.diff
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	diff --git a/sys/dev/gpio/gpiobus.c b/sys/dev/gpio/gpiobus.c
	--- a/sys/dev/gpio/gpiobus.c
	+++ b/sys/dev/gpio/gpiobus.c
	@@ -213,6 +213,28 @@
	return (0);
	}

	+/*
	+ * Note that this function should only
	+ * be used in cases where a pre-existing
	+ * gpiobus_pin structure exists. In most
	+ * cases, the gpio_pin_get_by_* functions
	+ * suffice.
	+ */
	+int
	+gpio_pin_acquire(gpio_pin_t gpio)
	+{
	+ device_t busdev;
	+
	+ KASSERT(gpio != NULL, ("GPIO pin is NULL."));
	+ KASSERT(gpio->dev != NULL, ("GPIO pin device is NULL."));
	+
	+ busdev = GPIO_GET_BUS(gpio->dev);
	+ if (busdev == NULL)
	+ return (ENXIO);
	+
	+ return (gpiobus_acquire_pin(busdev, gpio->pin));
	+}
	+
	void
	gpio_pin_release(gpio_pin_t gpio)
	{
	diff --git a/sys/dev/gpio/gpiobusvar.h b/sys/dev/gpio/gpiobusvar.h
	--- a/sys/dev/gpio/gpiobusvar.h
	+++ b/sys/dev/gpio/gpiobusvar.h
	@@ -156,6 +156,8 @@
	/* Acquire a pin by child and index (used by direct children of gpiobus). */
	int gpio_pin_get_by_child_index(device_t _child, uint32_t _idx, gpio_pin_t *_gp);

	+/* Acquire a pin from an existing gpio_pin_t. */
	+int gpio_pin_acquire(gpio_pin_t gpio);
	/* Release a pin acquired via any gpio_pin_get_xxx() function. */
	void gpio_pin_release(gpio_pin_t gpio);