From e8bf17d58a4db4b4f38617925414097f12e0d509 Mon Sep 17 00:00:00 2001 From: Evan Green Date: Mon, 22 Aug 2022 14:40:40 -0700 Subject: platform/chrome: cros_ec: Expose suspend_timeout_ms in debugfs In modern Chromebooks, the embedded controller has a mechanism where it will watch a hardware-controlled line that toggles in suspend, and wake the system up if an expected sleep transition didn't occur. This can be very useful for detecting power management issues where the system appears to suspend, but doesn't actually reach its lowest expected power states. Sometimes it's useful in debug and test scenarios to be able to control the duration of that timeout, or even disable the EC timeout mechanism altogether. Add a debugfs control to set the timeout to values other than the EC-defined default, for more convenient debug and development iteration. Signed-off-by: Evan Green Reviewed-by: Prashant Malani Reviewed-by: Stephen Boyd Reviewed-by: Guenter Roeck Link: https://lore.kernel.org/r/20220822144026.v3.1.Idd188ff3f9caddebc17ac357a13005f93333c21f@changeid [tzungbi: fix one nit in Documentation/ABI/testing/debugfs-cros-ec.] Signed-off-by: Tzung-Bi Shih --- include/linux/platform_data/cros_ec_proto.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/linux') diff --git a/include/linux/platform_data/cros_ec_proto.h b/include/linux/platform_data/cros_ec_proto.h index 408b29ca4004..e43107e0bee1 100644 --- a/include/linux/platform_data/cros_ec_proto.h +++ b/include/linux/platform_data/cros_ec_proto.h @@ -169,6 +169,7 @@ struct cros_ec_device { int event_size; u32 host_event_wake_mask; u32 last_resume_result; + u16 suspend_timeout_ms; ktime_t last_event_time; struct notifier_block notifier_ready; -- cgit v1.2.3-59-g8ed1b