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platform/chrome: cros_ec_lpc: Only check for events on MKBP notifies

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Only check EC for MKBP events when the ACPI notify value indicates the
notify is due to an MKBP host event. This reduces unnecessary queries to
the EC.

Notify value 0x80 is reserved for devices specific notifies. It is used
by many devices to indicate various events. It's only used by cros_ec
for MKBP events.

Signed-off-by: Rob Barnes <robbarnes@google.com>
Link: https://lore.kernel.org/r/20241218015759.3558830-1-robbarnes@google.com
Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>
This commit is contained in:
Rob Barnes
2024-12-18 01:57:59 +00:00
committed by Tzung-Bi Shih
parent 6fcbc55a6a
commit fb1e493426
2 changed files with 6 additions and 1 deletions
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include/linux/platform_data/cros_ec_proto.h
+5
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@@ -41,6 +41,11 @@
#define EC_MAX_REQUEST_OVERHEAD 1
#define EC_MAX_RESPONSE_OVERHEAD 32
/*
* ACPI notify value for MKBP host event.
*/
#define ACPI_NOTIFY_CROS_EC_MKBP 0x80
/*
* EC panic is not covered by the standard (0-F) ACPI notify values.
* Arbitrarily choosing B0 to notify ec panic, which is in the 84-BF