ipmi/bt: Rework iBT register access

The bits in the control register are mostly write-1-to-clear, so
the rmw sequences in bt_setmask() and bt_clearmask() don't work.

Additionally, H_BUSY is weird as it's a write-1-to-toggle, so let's
write a "safe" function that sets it to the desired state based on
its previous state. (We can optimize that further later).

Also enable interrupt operations.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/bt.h b/include/bt.h
index 1763d9f6..43843d24 100644
--- a/include/bt.h
+++ b/include/bt.h
@@ -19,5 +19,6 @@
 
 /* Initialise the BT interface */
 void bt_init(void);
+void bt_irq(void);
 
 #endif