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/*
* Device's clock input and output
*
* Copyright GreenSocs 2016-2020
*
* Authors:
* Frederic Konrad
* Damien Hedde
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#ifndef QDEV_CLOCK_H
#define QDEV_CLOCK_H
#include "hw/clock.h"
/**
* qdev_init_clock_in:
* @dev: the device to add an input clock to
* @name: the name of the clock (can't be NULL).
* @callback: optional callback to be called on update or NULL.
* @opaque: argument for the callback
* @returns: a pointer to the newly added clock
*
* Add an input clock to device @dev as a clock named @name.
* This adds a child<> property.
* The callback will be called with @opaque as opaque parameter.
*/
Clock *qdev_init_clock_in(DeviceState *dev, const char *name,
ClockCallback *callback, void *opaque);
/**
* qdev_init_clock_out:
* @dev: the device to add an output clock to
* @name: the name of the clock (can't be NULL).
* @returns: a pointer to the newly added clock
*
* Add an output clock to device @dev as a clock named @name.
* This adds a child<> property.
*/
Clock *qdev_init_clock_out(DeviceState *dev, const char *name);
/**
* qdev_get_clock_in:
* @dev: the device which has the clock
* @name: the name of the clock (can't be NULL).
* @returns: a pointer to the clock
*
* Get the input clock @name from @dev or NULL if does not exist.
*/
Clock *qdev_get_clock_in(DeviceState *dev, const char *name);
/**
* qdev_get_clock_out:
* @dev: the device which has the clock
* @name: the name of the clock (can't be NULL).
* @returns: a pointer to the clock
*
* Get the output clock @name from @dev or NULL if does not exist.
*/
Clock *qdev_get_clock_out(DeviceState *dev, const char *name);
/**
* qdev_connect_clock_in:
* @dev: a device
* @name: the name of an input clock in @dev
* @source: the source clock (an output clock of another device for example)
*
* Set the source clock of input clock @name of device @dev to @source.
* @source period update will be propagated to @name clock.
*/
static inline void qdev_connect_clock_in(DeviceState *dev, const char *name,
Clock *source)
{
clock_set_source(qdev_get_clock_in(dev, name), source);
}
/**
* qdev_alias_clock:
* @dev: the device which has the clock
* @name: the name of the clock in @dev (can't be NULL)
* @alias_dev: the device to add the clock
* @alias_name: the name of the clock in @container
* @returns: a pointer to the clock
*
* Add a clock @alias_name in @alias_dev which is an alias of the clock @name
* in @dev. The direction _in_ or _out_ will the same as the original.
* An alias clock must not be modified or used by @alias_dev and should
* typically be only only for device composition purpose.
*/
Clock *qdev_alias_clock(DeviceState *dev, const char *name,
DeviceState *alias_dev, const char *alias_name);
/**
* qdev_finalize_clocklist:
* @dev: the device being finalized
*
* Clear the clocklist from @dev. Only used internally in qdev.
*/
void qdev_finalize_clocklist(DeviceState *dev);
#endif /* QDEV_CLOCK_H */
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