event: Add events for device probe/remove
Generate events when devices are probed or removed, allowing hooks
to be added for these situations.
This is controlled by the DM_EVENT config option.
Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/core/Kconfig b/drivers/core/Kconfig
index 8f7703c..5c34004 100644
--- a/drivers/core/Kconfig
+++ b/drivers/core/Kconfig
@@ -77,6 +77,16 @@
it causes unplugged devices to linger around in the dm-tree, and it
causes USB host controllers to not be stopped when booting the OS.
+config DM_EVENT
+ bool "Support events with driver model"
+ depends on DM
+ imply EVENT
+ default y if SANDBOX
+ help
+ This enables support for generating events related to driver model
+ operations, such as prbing or removing a device. Subsystems can
+ register a 'spy' function that is called when the event occurs.
+
config SPL_DM_DEVICE_REMOVE
bool "Support device removal in SPL"
depends on SPL_DM
diff --git a/drivers/core/device-remove.c b/drivers/core/device-remove.c
index e6ec6ff..73d2e9e 100644
--- a/drivers/core/device-remove.c
+++ b/drivers/core/device-remove.c
@@ -207,6 +207,10 @@
if (!(dev_get_flags(dev) & DM_FLAG_ACTIVATED))
return 0;
+ ret = device_notify(dev, EVT_DM_PRE_REMOVE);
+ if (ret)
+ return ret;
+
/*
* If the child returns EKEYREJECTED, continue. It just means that it
* didn't match the flags.
@@ -256,6 +260,10 @@
dev_bic_flags(dev, DM_FLAG_ACTIVATED);
+ ret = device_notify(dev, EVT_DM_POST_REMOVE);
+ if (ret)
+ goto err_remove;
+
return 0;
err_remove:
diff --git a/drivers/core/device.c b/drivers/core/device.c
index 901c1e2..1b356f1 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -10,6 +10,7 @@
#include <common.h>
#include <cpu_func.h>
+#include <event.h>
#include <log.h>
#include <asm/global_data.h>
#include <asm/io.h>
@@ -493,6 +494,10 @@
if (dev_get_flags(dev) & DM_FLAG_ACTIVATED)
return 0;
+ ret = device_notify(dev, EVT_DM_PRE_PROBE);
+ if (ret)
+ return ret;
+
drv = dev->driver;
assert(drv);
@@ -597,6 +602,10 @@
dev->name, ret, errno_str(ret));
}
+ ret = device_notify(dev, EVT_DM_POST_PROBE);
+ if (ret)
+ return ret;
+
return 0;
fail_uclass:
if (device_remove(dev, DM_REMOVE_NORMAL)) {