Commit 957445d7 authored by Rob Barnes's avatar Rob Barnes Committed by Tzung-Bi Shih
Browse files

platform/chrome: cros_ec: Shutdown on EC Panic 



When an EC panic is reported, attempt an orderly shutdown.
Force a shutdown after a brief timeout if the orderly shutdown
fails for any reason.

Using the common hw_protection_shutdown utility function since
an EC panic has the potential to cause hw damage.

This is all best effort. EC should also force a hard reset after a
short timeout.

Signed-off-by: default avatarRob Barnes <robbarnes@google.com>
Reviewed-by: default avatarPrashant Malani <pmalani@chromium.org>
Signed-off-by: default avatarTzung-Bi Shih <tzungbi@kernel.org>
Link: https://lore.kernel.org/r/20230104011524.369764-3-robbarnes@google.com
parent d90fa2c6

drivers/platform/chrome/cros_ec_lpc.c

+3 −0
Original line number Diff line number Diff line
@@ -21,6 +21,7 @@ 
#include <linux/platform_data/cros_ec_proto.h>

#include <linux/platform_device.h>

#include <linux/printk.h>

#include <linux/reboot.h>

#include <linux/suspend.h>



#include "cros_ec.h"
@@ -323,6 +324,8 @@ 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);

		/* 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 */

		return;

	}