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| author |  Rob Barnes <robbarnes@google.com>
| 2023-05-09 23:26:24 +0000 |
|---|---|---|
| committer |  Tzung-Bi Shih <tzungbi@kernel.org>
| 2023-05-15 11:55:41 +0800 |
| commit | 2cbf475a04b2ae3d722bbe41742e5d874a027fc3 (patch) | |
| tree | 58678c21c564f0db9ced693871c0cf89c653f5f2 /drivers/platform/chrome/cros_ec_lpc.c | |
| parent | platform/chrome: cros_typec_switch: Add Pin D support (diff) | |
| download | linux-2cbf475a04b2ae3d722bbe41742e5d874a027fc3.tar.gz linux-2cbf475a04b2ae3d722bbe41742e5d874a027fc3.tar.bz2 linux-2cbf475a04b2ae3d722bbe41742e5d874a027fc3.zip | |
platform/chrome: cros_ec: Report EC panic as uevent
Create a uevent when an EC panic is detected. This will allow udev rules
to trigger when a panic occurs. For example, a udev rule could be added to
capture an EC coredump. This approach avoids the need to stuff all the
processing into the driver.
Signed-off-by: Rob Barnes <robbarnes@google.com>
Reviewed-by: Prashant Malani <pmalani@chromium.org>
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20230509232624.3120347-1-robbarnes@google.com
Diffstat (limited to 'drivers/platform/chrome/cros_ec_lpc.c')
| -rw-r--r-- | drivers/platform/chrome/cros_ec_lpc.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/platform/chrome/cros_ec_lpc.c b/drivers/platform/chrome/cros_ec_lpc.c index 68bba0fcafab..2b1ce3e1abf2 100644 --- a/drivers/platform/chrome/cros_ec_lpc.c +++ b/drivers/platform/chrome/cros_ec_lpc.c @@ -16,6 +16,7 @@ #include <linux/delay.h> #include <linux/io.h> #include <linux/interrupt.h> +#include <linux/kobject.h> #include <linux/module.h> #include <linux/platform_data/cros_ec_commands.h> #include <linux/platform_data/cros_ec_proto.h> @@ -315,6 +316,7 @@ static int cros_ec_lpc_readmem(struct cros_ec_device *ec, unsigned int offset, static void cros_ec_lpc_acpi_notify(acpi_handle device, u32 value, void *data) { + static const char *env[] = { "ERROR=PANIC", NULL }; struct cros_ec_device *ec_dev = data; bool ec_has_more_events; int ret; @@ -324,6 +326,7 @@ static void cros_ec_lpc_acpi_notify(acpi_handle device, u32 value, void *data) if (value == ACPI_NOTIFY_CROS_EC_PANIC) { dev_emerg(ec_dev->dev, "CrOS EC Panic Reported. Shutdown is imminent!"); blocking_notifier_call_chain(&ec_dev->panic_notifier, 0, ec_dev); + kobject_uevent_env(&ec_dev->dev->kobj, KOBJ_CHANGE, (char **)env); /* Begin orderly shutdown. Force shutdown after 1 second. */ hw_protection_shutdown("CrOS EC Panic", 1000); /* Do not query for other events after a panic is reported */ |