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usb: musb: add tracepoints support for debugging

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To avoid printk() overhead while debugging, this patch implements the
foundation of tracepoints logging for musb driver to make debug
easier.

Signed-off-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Bin Liu
2016-06-30 12:12:21 -05:00
committed by Greg Kroah-Hartman
parent ca2b6faeb9
commit f89252ad19
4 changed files with 93 additions and 1 deletions
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2
drivers/usb/musb/musb_debug.h
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@@ -42,6 +42,8 @@
#define INFO(fmt, args...) yprintk(KERN_INFO, fmt, ## args)
#define ERR(fmt, args...) yprintk(KERN_ERR, fmt, ## args)
void musb_dbg(struct musb *musb, const char *fmt, ...);
#ifdef CONFIG_DEBUG_FS
int musb_init_debugfs(struct musb *musb);
void musb_exit_debugfs(struct musb *musb);