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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: 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/20230104011524.369764-3-robbarnes@google.com
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@ -21,6 +21,7 @@
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#include <linux/platform_data/cros_ec_proto.h>
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#include <linux/platform_device.h>
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#include <linux/printk.h>
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#include <linux/reboot.h>
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#include <linux/suspend.h>
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#include "cros_ec.h"
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@ -323,6 +324,8 @@ static void cros_ec_lpc_acpi_notify(acpi_handle device, u32 value, void *data)
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if (value == ACPI_NOTIFY_CROS_EC_PANIC) {
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dev_emerg(ec_dev->dev, "CrOS EC Panic Reported. Shutdown is imminent!");
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blocking_notifier_call_chain(&ec_dev->panic_notifier, 0, ec_dev);
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/* Begin orderly shutdown. Force shutdown after 1 second. */
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hw_protection_shutdown("CrOS EC Panic", 1000);
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/* Do not query for other events after a panic is reported */
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return;
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}
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