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| author | Simon Glass <sjg@chromium.org> | 2022-03-04 08:43:03 -0700 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2022-03-10 08:28:36 -0500 |
| commit | 5b896ed5856f768cdd55cdeb44c5f8f6b6a7a18a (patch) | |
| tree | 427918a7828619a8620cd9b95d547539c9eb6733 /drivers/core | |
| parent | 5a4219043d659514316e41d3d09866030c773e78 (diff) | |
| download | u-boot-5b896ed5856f768cdd55cdeb44c5f8f6b6a7a18a.zip u-boot-5b896ed5856f768cdd55cdeb44c5f8f6b6a7a18a.tar.gz u-boot-5b896ed5856f768cdd55cdeb44c5f8f6b6a7a18a.tar.bz2 | |
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>
Diffstat (limited to 'drivers/core')
| -rw-r--r-- | drivers/core/Kconfig | 10 | ||||
| -rw-r--r-- | drivers/core/device-remove.c | 8 | ||||
| -rw-r--r-- | drivers/core/device.c | 9 |
3 files changed, 27 insertions, 0 deletions
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 @@ config DM_DEVICE_REMOVE 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 @@ int device_remove(struct udevice *dev, uint flags) 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 @@ int device_remove(struct udevice *dev, uint flags) 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 @@ int device_probe(struct udevice *dev) 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 @@ int device_probe(struct udevice *dev) 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)) { |