From d90fa2c64d59f5f151beeef5dbc599784b3391ca Mon Sep 17 00:00:00 2001 From: Rob Barnes Date: Wed, 4 Jan 2023 01:15:23 +0000 Subject: platform/chrome: cros_ec: Poll EC log on EC panic Add handler for CrOS EC panic events. When a panic is reported, immediately poll for EC log. This should result in the log leading to the EC panic being preserved. ACPI_NOTIFY_CROS_EC_PANIC is defined in coreboot at https://review.coreboot.org/plugins/gitiles/coreboot/+/refs/heads/master/src/ec/google/chromeec/acpi/ec.asl Signed-off-by: Rob Barnes Reviewed-by: Prashant Malani Signed-off-by: Tzung-Bi Shih Link: https://lore.kernel.org/r/20230104011524.369764-2-robbarnes@google.com --- include/linux/platform_data/cros_ec_proto.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'include/linux/platform_data') diff --git a/include/linux/platform_data/cros_ec_proto.h b/include/linux/platform_data/cros_ec_proto.h index e43107e0bee1..7fb2196f99b0 100644 --- a/include/linux/platform_data/cros_ec_proto.h +++ b/include/linux/platform_data/cros_ec_proto.h @@ -41,6 +41,13 @@ #define EC_MAX_REQUEST_OVERHEAD 1 #define EC_MAX_RESPONSE_OVERHEAD 32 +/* + * 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 + * device specific ACPI notify range. + */ +#define ACPI_NOTIFY_CROS_EC_PANIC 0xB0 + /* * Command interface between EC and AP, for LPC, I2C and SPI interfaces. */ @@ -176,6 +183,8 @@ struct cros_ec_device { /* The platform devices used by the mfd driver */ struct platform_device *ec; struct platform_device *pd; + + struct blocking_notifier_head panic_notifier; }; /** -- cgit v1.2.3