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authorEvan Green <evgreen@chromium.org>2019-06-27 13:44:45 -0700
committerEnric Balletbo i Serra <enric.balletbo@collabora.com>2019-07-01 15:39:11 +0200
commit8c3166e17cf10161d2871dfb1d017287c7b79ff1 (patch)
treed5a236fb41c68187aac195ba0c4033bd8a428713 /drivers/mfd
parentc18e6ea1014ca1ade0030aca5e80af33c8873e1e (diff)
downloadlinux-8c3166e17cf10161d2871dfb1d017287c7b79ff1.tar.bz2
mfd / platform: cros_ec_debugfs: Expose resume result via debugfs
For ECs that support it, the EC returns the number of slp_s0 transitions and whether or not there was a timeout in the resume response. Expose the last resume result to usermode via debugfs so that usermode can detect and report S0ix timeouts. Signed-off-by: Evan Green <evgreen@chromium.org> Acked-by: Lee Jones <lee.jones@linaro.org> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Diffstat (limited to 'drivers/mfd')
-rw-r--r--drivers/mfd/cros_ec.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index bd2bcdd4718b..64a2d3adc729 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -110,12 +110,16 @@ static int cros_ec_sleep_event(struct cros_ec_device *ec_dev, u8 sleep_event)
/* For now, report failure to transition to S0ix with a warning. */
if (ret >= 0 && ec_dev->host_sleep_v1 &&
- (sleep_event == HOST_SLEEP_EVENT_S0IX_RESUME))
+ (sleep_event == HOST_SLEEP_EVENT_S0IX_RESUME)) {
+ ec_dev->last_resume_result =
+ buf.u.resp1.resume_response.sleep_transitions;
+
WARN_ONCE(buf.u.resp1.resume_response.sleep_transitions &
EC_HOST_RESUME_SLEEP_TIMEOUT,
"EC detected sleep transition timeout. Total slp_s0 transitions: %d",
buf.u.resp1.resume_response.sleep_transitions &
EC_HOST_RESUME_SLEEP_TRANSITIONS_MASK);
+ }
return ret;
}