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gpio: enable callback to specify pin in addition to pin_mask 

There are GPIO controllers that can control more than 32 pins.
The pin_mask is no longer adequate in this case. This wraps
the pin_mask in a union together with a field named 'pin'.
The driver is responsible for choosing whether to use
pin_mask or pin.

Signed-off-by: Daniel Leung <daniel.leung@intel.com>
This commit is contained in:
Daniel Leung 2018-09-19 10:15:11 -07:00 committed by Anas Nashif
parent 2f0282a239
commit eb6ea28649
1 changed files with 7 additions and 3 deletions
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8
include/gpio.h
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@ -90,13 +90,17 @@ struct gpio_callback {
/** Actual callback function being called when relevant. */
gpio_callback_handler_t handler;
/** A mask of pins the callback is interested in, if 0 the callback
* will never be called. Such pin_mask can be modified whenever
/** A mask of pins (pin_mask) or a specific pin (pin) the callback
* is interested in, if 0 the callback will never be called.
* The pin_mask or pin can be modified whenever
* necessary by the owner, and thus will affect the handler being
* called or not. The selected pins must be configured to trigger
* an interrupt.
*/
union {
u32_t pin_mask;
u32_t pin;
};
};
/**