usb: musb: add tracepoints to dump interrupt events

This adds tracepoints to dump musb interrupt events.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 22 insertions, 3 deletions

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index c0c81ae6e6ed..74fc3069cb42 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1588,9 +1588,7 @@ irqreturn_t musb_interrupt(struct musb *musb)
 
         devctl = musb_readb(musb->mregs, MUSB_DEVCTL);
 
-        dev_dbg(musb->controller, "** IRQ %s usb%04x tx%04x rx%04x\n",
-                is_host_active(musb) ? "host" : "peripheral",
-                musb->int_usb, musb->int_tx, musb->int_rx);
+        trace_musb_isr(musb);
 
         /**
          * According to Mentor Graphics' documentation, flowchart on page 98,
diff --git a/drivers/usb/musb/musb_trace.h b/drivers/usb/musb/musb_trace.h
index c974f48ee5d8..98acc1e0a7a0 100644
--- a/drivers/usb/musb/musb_trace.h
+++ b/drivers/usb/musb/musb_trace.h
@@ -128,6 +128,27 @@ DEFINE_EVENT(musb_regl, musb_writel,
         TP_ARGS(caller, addr, offset, data)
 );
 
+TRACE_EVENT(musb_isr,
+        TP_PROTO(struct musb *musb),
+        TP_ARGS(musb),
+        TP_STRUCT__entry(
+                __string(name, dev_name(musb->controller))
+                __field(u8, int_usb)
+                __field(u16, int_tx)
+                __field(u16, int_rx)
+        ),
+        TP_fast_assign(
+                __assign_str(name, dev_name(musb->controller));
+                __entry->int_usb = musb->int_usb;
+                __entry->int_tx = musb->int_tx;
+                __entry->int_rx = musb->int_rx;
+        ),
+        TP_printk("%s: usb %02x, tx %04x, rx %04x",
+                __get_str(name), __entry->int_usb,
+                __entry->int_tx, __entry->int_rx
+        )
+);
+
 #endif /* __MUSB_TRACE_H */
 
 /* this part has to be here */