diff options
| -rw-r--r-- | hw/core/qdev.c | 25 | ||||
| -rw-r--r-- | include/hw/qdev-core.h | 2 |
2 files changed, 27 insertions, 0 deletions
diff --git a/hw/core/qdev.c b/hw/core/qdev.c index fc7860f0bb..92f88f6698 100644 --- a/hw/core/qdev.c +++ b/hw/core/qdev.c @@ -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); diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h index 1fca75c591..cf27e6564a 100644 --- a/include/hw/qdev-core.h +++ b/include/hw/qdev-core.h @@ -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); |