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[v5,10/15] qdev: Define qdev_get_gpio_out

Message ID be26f11c793dbe2f88ddfc21f0d266e0c0d50448.1457470980.git.alistair.francis@xilinx.com (mailing list archive)
State New, archived
Headers show

Commit Message

Alistair Francis March 8, 2016, 9:06 p.m. UTC 
From: Peter Crosthwaite <peter.crosthwaite@xilinx.com>

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 <peter.crosthwaite@xilinx.com>
Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
---

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

Patch

diff --git a/hw/core/qdev.c b/hw/core/qdev.c
index db41aa1..e3015d2 100644
--- a/hw/core/qdev.c
+++ b/hw/core/qdev.c
@@ -489,6 +489,18 @@  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 c3ff99f..25aa9e9 100644
--- a/include/hw/qdev-core.h
+++ b/include/hw/qdev-core.h
@@ -286,6 +286,8 @@  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,