[RFC,18/22] thunderbolt: Make tb_switch_find_cap() available to other files

Commit Message

Mika Westerberg Oct. 1, 2019, 11:38 a.m. UTC

From: Rajmohan Mani <[e-mail]>

We need to find switch capabilities in order to implement TMU support so
make it available to other files as well.

Signed-off-by: Rajmohan Mani <[e-mail]>
Signed-off-by: Mika Westerberg <[e-mail]>
---
 drivers/thunderbolt/cap.c | 11 ++++++++++-
 drivers/thunderbolt/tb.h  |  1 +
 2 files changed, 11 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/thunderbolt/cap.c b/drivers/thunderbolt/cap.c
index 8bf8e031f0bc..568d878f19f7 100644
--- a/drivers/thunderbolt/cap.c
+++ b/drivers/thunderbolt/cap.c
@@ -113,7 +113,16 @@  int tb_port_find_cap(struct tb_port *port, enum tb_port_cap cap)
 	return ret;
 }
 
-static int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap)
+/**
+ * tb_switch_find_cap() - Find switch capability
+ * @sw Switch to find the capability for
+ * @cap: Capability to look
+ *
+ * Returns offset to start of capability or %-ENOENT if no such
+ * capability was found. Negative errno is returned if there was an
+ * error.
+ */
+int tb_switch_find_cap(struct tb_switch *sw, enum tb_switch_cap cap)
 {
 	int offset = sw->config.first_cap_offset;
 
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 60f237020d1b..1488382066fd 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -709,6 +709,7 @@  struct tb_port *tb_next_port_on_path(struct tb_port *start, struct tb_port *end,
 				     struct tb_port *prev);
 
 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);
 bool tb_port_is_enabled(struct tb_port *port);