thunderbolt: Add thunderbolt capability handling
Thunderbolt config areas contain capability lists similar to those found
on pci devices. This patch introduces a tb_find_cap utility method to
search for capabilities.
Signed-off-by: Andreas Noever <andreas.noever@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/thunderbolt/tb.h b/drivers/thunderbolt/tb.h
index 389dbb4..38e4c23 100644
--- a/drivers/thunderbolt/tb.h
+++ b/drivers/thunderbolt/tb.h
@@ -159,6 +159,8 @@
struct tb_switch *tb_switch_alloc(struct tb *tb, u64 route);
void tb_switch_free(struct tb_switch *sw);
+int tb_find_cap(struct tb_port *port, enum tb_cfg_space space, u32 value);
+
static inline int tb_route_length(u64 route)
{