[Qemu-devel] [PATCH v1 10/15] qdev: Define qdev_get_gpio_out

[Alistair Francis]

From: Peter Crosthwaite <address@hidden>

An API similar to the existing qdev_get_gpio_in() except gets outputs.
Useful for:

1: Implementing lightweight devices that don't want to keep pointers
to their own GPIOs. They can get their GPIO pointers at runtime from
QOM using this API.

2: testing or debugging code which may wish to override the
hardware generated value of of a GPIO with a user specified value
(E.G. interrupt injection).

Signed-off-by: Peter Crosthwaite <address@hidden>
---

 hw/core/qdev.c         |   12 ++++++++++++
 include/hw/qdev-core.h |    2 ++
 2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index b2f404a..3594151 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -476,6 +476,18 @@ qemu_irq qdev_get_gpio_in(DeviceState *dev, int n)
     return qdev_get_gpio_in_named(dev, NULL, n);
 }
 
+qemu_irq qdev_get_gpio_out_named(DeviceState *dev, const char *name, int n)
+{
+    char *propname = g_strdup_printf("%s[%d]",
+                                     name ? name : "unnamed-gpio-out", n);
+    return (qemu_irq)object_property_get_link(OBJECT(dev), propname, NULL);
+}
+
+qemu_irq qdev_get_gpio_out(DeviceState *dev, int n)
+{
+    return qdev_get_gpio_out_named(dev, NULL, n);
+}
+
 void qdev_connect_gpio_out_named(DeviceState *dev, const char *name, int n,
                                  qemu_irq pin)
 {
diff --git a/include/hw/qdev-core.h b/include/hw/qdev-core.h
index 038b54d..0a21d57 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -274,6 +274,8 @@ bool qdev_machine_modified(void);
 
 qemu_irq qdev_get_gpio_in(DeviceState *dev, int n);
 qemu_irq qdev_get_gpio_in_named(DeviceState *dev, const char *name, int n);
+qemu_irq qdev_get_gpio_out(DeviceState *dev, int n);
+qemu_irq qdev_get_gpio_out_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,
-- 
1.7.1