Merge branch 'linus' into timers/clocksource

... to bring it up to date for new changes.

1 files changed, 13 insertions, 4 deletions

diff --git a/include/linux/mailbox_controller.h b/include/linux/mailbox_controller.h
index 80a427c7ca29..dc93287a2a01 100644
--- a/include/linux/mailbox_controller.h
+++ b/include/linux/mailbox_controller.h
@@ -3,6 +3,7 @@
 #ifndef __MAILBOX_CONTROLLER_H
 #define __MAILBOX_CONTROLLER_H
 
+#include <linux/bits.h>
 #include <linux/completion.h>
 #include <linux/device.h>
 #include <linux/hrtimer.h>
@@ -11,6 +12,13 @@
 
 struct mbox_chan;
 
+/* Sentinel value distinguishing "no active request" from "NULL message data" */
+#define MBOX_NO_MSG	((void *)-1)
+
+#define MBOX_TXDONE_BY_IRQ	BIT(0) /* controller has remote RTR irq */
+#define MBOX_TXDONE_BY_POLL	BIT(1) /* controller can read status of last TX */
+#define MBOX_TXDONE_BY_ACK	BIT(2) /* S/W ACK received by Client ticks the TX */
+
 /**
  * struct mbox_chan_ops - methods to control mailbox channels
  * @send_data:	The API asks the MBOX controller driver, in atomic
@@ -54,10 +62,10 @@ struct mbox_chan_ops {
 
 /**
  * struct mbox_controller - Controller of a class of communication channels
- * @dev:		Device backing this controller
- * @ops:		Operators that work on each communication chan
- * @chans:		Array of channels
- * @num_chans:		Number of channels in the 'chans' array.
+ * @dev:		Device backing this controller. Required.
+ * @ops:		Operators that work on each communication chan. Required.
+ * @chans:		Array of channels. Required.
+ * @num_chans:		Number of channels in the 'chans' array. Required.
  * @txdone_irq:		Indicates if the controller can report to API when
  *			the last transmitted data was read by the remote.
  *			Eg, if it has some TX ACK irq.
@@ -70,6 +78,7 @@ struct mbox_chan_ops {
  * @of_xlate:		Controller driver specific mapping of channel via DT
  * @poll_hrt:		API private. hrtimer used to poll for TXDONE on all
  *			channels.
+ * @poll_hrt_lock:	API private. Lock protecting access to poll_hrt.
  * @node:		API private. To hook into list of controllers.
  */
 struct mbox_controller {