usb: otg: move usb_otg_state_string to usb-common.c

otg.c only had a single function definition
which might make more sense to be placed in
usb-common.c. While doing that, we also delete
otg.c since it's now empty.

Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/drivers/usb/usb-common.c b/drivers/usb/usb-common.c
index 070b681e5d17..0db0a919d72b 100644
--- a/drivers/usb/usb-common.c
+++ b/drivers/usb/usb-common.c
@@ -14,6 +14,32 @@
 #include <linux/kernel.h>
 #include <linux/module.h>
 #include <linux/usb/ch9.h>
+#include <linux/usb/otg.h>
+
+const char *usb_otg_state_string(enum usb_otg_state state)
+{
+        static const char *const names[] = {
+                [OTG_STATE_A_IDLE] = "a_idle",
+                [OTG_STATE_A_WAIT_VRISE] = "a_wait_vrise",
+                [OTG_STATE_A_WAIT_BCON] = "a_wait_bcon",
+                [OTG_STATE_A_HOST] = "a_host",
+                [OTG_STATE_A_SUSPEND] = "a_suspend",
+                [OTG_STATE_A_PERIPHERAL] = "a_peripheral",
+                [OTG_STATE_A_WAIT_VFALL] = "a_wait_vfall",
+                [OTG_STATE_A_VBUS_ERR] = "a_vbus_err",
+                [OTG_STATE_B_IDLE] = "b_idle",
+                [OTG_STATE_B_SRP_INIT] = "b_srp_init",
+                [OTG_STATE_B_PERIPHERAL] = "b_peripheral",
+                [OTG_STATE_B_WAIT_ACON] = "b_wait_acon",
+                [OTG_STATE_B_HOST] = "b_host",
+        };
+
+        if (state < 0 || state >= ARRAY_SIZE(names))
+                return "UNDEFINED";
+
+        return names[state];
+}
+EXPORT_SYMBOL_GPL(usb_otg_state_string);
 
 const char *usb_speed_string(enum usb_device_speed speed)
 {