slimbus: Don't allow a grouped channel to be controlled individually
Once client defines a group of channels, it should be only allowed to
be controlled as a group and not individually to avoid synchronization
issues between grouped channels.
Change-Id: Ib318497b2666eb5134a1cb220e5df6569c9fcc2e
Signed-off-by: Sagar Dharia <sdharia@codeaurora.org>
diff --git a/include/linux/slimbus/slimbus.h b/include/linux/slimbus/slimbus.h
index 448d9ab..75b132b 100644
--- a/include/linux/slimbus/slimbus.h
+++ b/include/linux/slimbus/slimbus.h
@@ -877,6 +877,7 @@
* -EXFULL is returned if there is no space in TDM to reserve the bandwidth.
* -EISCONN/-ENOTCONN is returned if the channel is already connected or not
* yet defined.
+ * -EINVAL is returned if individual control of a grouped-channel is attempted.
*/
extern int slim_control_ch(struct slim_device *sb, u16 grpchanh,
enum slim_ch_control chctrl, bool commit);