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qdev-clock: introduce an init array to ease the device construction

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Introduce a function and macro helpers to setup several clocks
in a device from a static array description.

An element of the array describes the clock (name and direction) as
well as the related callback and an optional offset to store the
created object pointer in the device state structure.

The array must be terminated by a special element QDEV_CLOCK_END.

This is based on the original work of Frederic Konrad.

Signed-off-by: Damien Hedde <damien.hedde@greensocs.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Message-id: 20200406135251.157596-5-damien.hedde@greensocs.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Damien Hedde
2020-04-06 15:52:46 +02:00
committed by Peter Maydell
parent 0e6934f264
commit f0bc2a64c0
2 changed files with 72 additions and 0 deletions
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17
hw/core/qdev-clock.c
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@ -116,6 +116,23 @@ Clock *qdev_init_clock_in(DeviceState *dev, const char *name,
return ncl->clock;
}
void qdev_init_clocks(DeviceState *dev, const ClockPortInitArray clocks)
{
const struct ClockPortInitElem *elem;
for (elem = &clocks[0]; elem->name != NULL; elem++) {
Clock **clkp;
/* offset cannot be inside the DeviceState part */
assert(elem->offset > sizeof(DeviceState));
clkp = (Clock **)(((void *) dev) + elem->offset);
if (elem->is_output) {
*clkp = qdev_init_clock_out(dev, elem->name);
} else {
*clkp = qdev_init_clock_in(dev, elem->name, elem->callback, dev);
}
}
}
static NamedClockList *qdev_get_clocklist(DeviceState *dev, const char *name)
{
NamedClockList *ncl;