From 964a2331e9a207fc15ef9eef833212347498bea1 Mon Sep 17 00:00:00 2001 From: Tomas Winkler Date: Tue, 18 Mar 2014 22:51:59 +0200 Subject: mei: expose hardware power gating state to mei layer Since the runtime pm and the internal power gating cannot be in complete sync in regards to I/O operations, we need to expose the device hardware internal power gating state to mei layer 2. We add pg_state handler that translate the hw internal pg state to mei layer 2. We add power gating event variable to keep power track of power gating transitions Signed-off-by: Tomas Winkler Signed-off-by: Alexander Usyskin Reviewed-by: Alexander Usyskin Signed-off-by: Greg Kroah-Hartman --- drivers/misc/mei/hw-me.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'drivers/misc/mei/hw-me.c') diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 7a7e66250dfd..02f3b0c3a2a3 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -113,6 +113,19 @@ static void mei_me_hw_config(struct mei_device *dev) /* Doesn't change in runtime */ dev->hbuf_depth = (hcsr & H_CBD) >> 24; } + +/** + * mei_me_pg_state - translate internal pg state + * to the mei power gating state + * + * @hw - me hardware + * returns: MEI_PG_OFF if aliveness is on and MEI_PG_ON otherwise + */ +static inline enum mei_pg_state mei_me_pg_state(struct mei_device *dev) +{ + return MEI_PG_OFF; +} + /** * mei_clear_interrupts - clear and stop interrupts * @@ -601,6 +614,8 @@ end: } static const struct mei_hw_ops mei_me_hw_ops = { + .pg_state = mei_me_pg_state, + .host_is_ready = mei_me_host_is_ready, .hw_is_ready = mei_me_hw_is_ready, -- cgit v1.2.3