platform/chrome: Add support for v1 of host sleep event

Add support in code for the new forms of the host sleep event.
Detects the presence of this version of the command at runtime,
and use whichever form the EC supports. At this time, always
request the default timeout, and only report the failing response
via a WARN_ONCE(). Future versions could accept the sleep parameter
from outside the driver, and return the response information to
usermode or elsewhere.

Signed-off-by: Evan Green <evgreen@chromium.org>
Reviewed-by: Rajat Jain <rajatja@chromium.org>
Reviewed-by: Guenter Roeck <groeck@chromium.org>
Acked-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/mfd/cros_ec.h b/include/linux/mfd/cros_ec.h
index 109292a60499..31c88a0070a3 100644
--- a/include/linux/mfd/cros_ec.h
+++ b/include/linux/mfd/cros_ec.h
@@ -121,6 +121,7 @@ struct cros_ec_command {
  * @pkt_xfer: Send packet to EC and get response.
  * @lock: One transaction at a time.
  * @mkbp_event_supported: True if this EC supports the MKBP event protocol.
+ * @host_sleep_v1: True if this EC supports the sleep v1 command.
  * @event_notifier: Interrupt event notifier for transport devices.
  * @event_data: Raw payload transferred with the MKBP event.
  * @event_size: Size in bytes of the event data.
@@ -154,6 +155,7 @@ struct cros_ec_device {
 			struct cros_ec_command *msg);
 	struct mutex lock;
 	bool mkbp_event_supported;
+	bool host_sleep_v1;
 	struct blocking_notifier_head event_notifier;
 
 	struct ec_response_get_next_event_v1 event_data;