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qdev: gpio: Register GPIO outputs as QOM links 

Within the object that contains the GPIO output. This allows for
connecting GPIO outputs via setting of a Link property.

Also clear the link value to zero. This catch-alls the case
where a device improperly inits a gpio_out (malloc instead of
malloc0).

Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This commit is contained in:
Peter Crosthwaite 2014-09-25 22:18:14 -07:00 committed by Andreas Färber
parent a69bef1cf1
commit 688b057aec
1 changed files with 12 additions and 0 deletions
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12
hw/core/qdev.c
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@ -362,12 +362,24 @@ void qdev_init_gpio_in(DeviceState *dev, qemu_irq_handler handler, int n)
void qdev_init_gpio_out_named(DeviceState *dev, qemu_irq *pins,
const char *name, int n)
{
int i;
NamedGPIOList *gpio_list = qdev_get_named_gpio_list(dev, name);
char *propname = g_strdup_printf("%s[*]", name ? name : "unnamed-gpio-out");
assert(gpio_list->num_in == 0 || !name);
assert(gpio_list->num_out == 0);
gpio_list->num_out = n;
gpio_list->out = pins;
for (i = 0; i < n; ++i) {
memset(&pins[i], 0, sizeof(*pins));
object_property_add_link(OBJECT(dev), propname, TYPE_IRQ,
(Object **)&pins[i],
object_property_allow_set_link,
OBJ_PROP_LINK_UNREF_ON_RELEASE,
&error_abort);
}
g_free(propname);
}
void qdev_init_gpio_out(DeviceState *dev, qemu_irq *pins, int n)