[15/17] thunderbolt: Make tb_port_get_link_speed() available to other files

Commit Message

Mika Westerberg June 15, 2020, 2:26 p.m. UTC

We need to call this from tb.c when we improve the bandwidth management
to take USB3 into account.

Signed-off-by: Mika Westerberg <[e-mail]>
---
 drivers/thunderbolt/switch.c | 8 +++++++-
 drivers/thunderbolt/tb.h     | 2 ++
 2 files changed, 9 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/thunderbolt/switch.c b/drivers/thunderbolt/switch.c
index 29db484d2c74..c01176429d5f 100644
--- a/drivers/thunderbolt/switch.c
+++ b/drivers/thunderbolt/switch.c
@@ -911,7 +911,13 @@  struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end,
 	return next != prev ? next : NULL;
 }
 
-static int tb_port_get_link_speed(struct tb_port *port)
+/**
+ * tb_port_get_link_speed() - Get current link speed
+ * @port: Port to check (USB4 or CIO)
+ *
+ * Returns link speed in Gb/s or negative errno in case of failure.
+ */
+int tb_port_get_link_speed(struct tb_port *port)
 {
 	u32 val, speed;
 	int ret;
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index cb53a94fe4f8..c6f18200fe92 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -759,6 +759,8 @@  struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end,
 	for ((p) = tb_next_port_on_path((src), (dst), NULL); (p);	\
 	     (p) = tb_next_port_on_path((src), (dst), (p)))
 
+int tb_port_get_link_speed(struct tb_port *port);
+
 int tb_switch_find_vse_cap(struct tb_switch *sw, enum tb_switch_vse_cap vsec);
 int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap);
 int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap);