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qdev: gpio: Add API for intercepting a GPIO 

To replace the old qemu_irq intercept API (which had users reaching
into qdev private state for GPIOs).

Reviewed-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Crosthwaite 2014-09-25 22:20:58 -07:00 committed by Paolo Bonzini
parent 02757df2ad
commit 0c24db2b8c
2 changed files with 27 additions and 0 deletions
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25
hw/core/qdev.c
View File

@ -455,6 +455,31 @@ void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
g_free(propname);
}
/* disconnect a GPIO ouput, returning the disconnected input (if any) */
static qemu_irq qdev_disconnect_gpio_out_named(DeviceState *dev,
const char *name, int n)
{
char *propname = g_strdup_printf("%s[%d]",
name ? name : "unnamed-gpio-out", n);
qemu_irq ret = (qemu_irq)object_property_get_link(OBJECT(dev), propname,
NULL);
if (ret) {
object_property_set_link(OBJECT(dev), NULL, propname, NULL);
}
g_free(propname);
return ret;
}
qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt,
const char *name, int n)
{
qemu_irq disconnected = qdev_disconnect_gpio_out_named(dev, name, n);
qdev_connect_gpio_out_named(dev, name, n, icpt);
return disconnected;
}
void qdev_connect_gpio_out(DeviceState * dev, int n, qemu_irq pin)
{
qdev_connect_gpio_out_named(dev, NULL, n, pin);

2
include/hw/qdev-core.h
View File

@ -273,6 +273,8 @@ qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n);
void qdev_connect_gpio_out(DeviceState *dev, int n, qemu_irq pin);
void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
qemu_irq pin);
qemu_irq qdev_intercept_gpio_out(DeviceState *dev, qemu_irq icpt,
const char *name, int n);
BusState *qdev_get_child_bus(DeviceState *dev, const char *name);