This adds tracepoints to dump musb interrupt events.
Signed-off-by: Bin Liu <b-liu@xxxxxx>
---
drivers/usb/musb/musb_core.c | 4 +---
drivers/usb/musb/musb_trace.h | 22 ++++++++++++++++++++++
2 files changed, 23 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 910ef11..269b7da 100644
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1607,9 +1607,7 @@ 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 0e4cd70..7bed990 100644
--- a/drivers/usb/musb/musb_trace.h
+++ b/drivers/usb/musb/musb_trace.h
@@ -23,6 +23,7 @@
#include <linux/types.h>
#include <linux/tracepoint.h>
+#include "musb_core.h"
#define MUSB_MSG_MAX 500
@@ -127,6 +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 */
--
1.9.1
--
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