gpio: Fix documentation
BRANCH=none
TEST=none
/**
* @def GPIO
- * @brief The GPIO macro is used to define a new GPIO pin name and function.
+ * @brief The GPIO macro defines a GPIO pin name and function.
*
* The name is used to populate the gpio_signal enum by first
* prepending GPIO_ to the name. It is also used to construct the
/**
* @def GPIO_INT
- * @brief The GPIO_INT macro is used to define a GPIO that has an IRQ handler.
+ * @brief The GPIO_INT macro defines a GPIO that has an IRQ handler.
*
* The IRQ handler pointers are stored as elements in the gpio_irq_handlers
* array.
/**
* @def ALTERNATE
- * @brief The ALTERNATE macro is used associate a GPIO with an alternate
- * function.
+ * @brief The ALTERNATE macro associates a GPIO with an alternate function.
*
* Alternate functions allow hardware peripherals access to GPIO pins.
* Modules use gpio_config_module to enable and disable the alternate functions
/**
* @def UNIMPLEMENTED
- * @brief The UNIMPLEMENTED macro is used to define a GPIO that doesn't actually exist.
+ * @brief The UNIMPLEMENTED macro defines a GPIO that doesn't actually exist.
*
* Some GPIO names are well known and used by generic code, ENTERING_RW and WP_L
* are examples. If a particular board doesn't have a GPIO assigned to such a
/**
* @def UNUSED
- * @brief The UNUSED macro is used to define a pin as unused.
+ * @brief The UNUSED macro defines a pin as unused.
*
* This allows the chip specific code to provision these pins for
* the lowest power state.
/**
* @def IOEX
- * @brief The IOEX macro is used to define a new IO Expander GPIO pin.
+ * @brief The IOEX macro defines an IO Expander GPIO.
*
* The name is used to populate enum ioex_signal by prepending "IOEX_".
*/
/**
* @def IOEX_INT
- * @brief The IOEX_INT macro is used to define a GPIOs that have an IRQ handler.
+ * @brief The IOEX_INT macro defines an IO Expander GPIO that has an IRQ handler.
*
* The IRQ handler pointers are stored as elements in the ioex_irq_handlers
* array.
