From 0c24db2b8c60cb578d7af6fb50c0ad60a723a02d Mon Sep 17 00:00:00 2001 From: Peter Crosthwaite Date: Thu, 25 Sep 2014 22:20:58 -0700 Subject: 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 Signed-off-by: Peter Crosthwaite Signed-off-by: Paolo Bonzini --- hw/core/qdev.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'hw/core') 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); -- cgit v1.2.3