From c74173fdd4fba23f237af48dff95f613f011cee3 Mon Sep 17 00:00:00 2001 From: Bin Liu Date: Thu, 30 Jun 2016 12:12:24 -0500 Subject: usb: musb: add tracepoints for register access This adds tracepoints to musb register read/write wrappers to get trace log for register access. The default tacepoint log prefix here would be musb_readX/writeX(), which is not much helpful. So this patch let the tracepoints use __buildin_return_address(0) to print the caller funciton name to provide more context of the register access. Signed-off-by: Bin Liu Signed-off-by: Greg Kroah-Hartman --- drivers/usb/musb/musb_core.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) (limited to 'drivers/usb/musb/musb_core.c') diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c index d2bc45cf96a8..c0c81ae6e6ed 100644 --- a/drivers/usb/musb/musb_core.c +++ b/drivers/usb/musb/musb_core.c @@ -102,6 +102,7 @@ #include #include "musb_core.h" +#include "musb_trace.h" #define TA_WAIT_BCON(m) max_t(int, (m)->a_wait_bcon, OTG_TIME_A_WAIT_BCON) @@ -258,31 +259,43 @@ static u32 musb_default_busctl_offset(u8 epnum, u16 offset) static u8 musb_default_readb(const void __iomem *addr, unsigned offset) { - return __raw_readb(addr + offset); + u8 data = __raw_readb(addr + offset); + + trace_musb_readb(__builtin_return_address(0), addr, offset, data); + return data; } static void musb_default_writeb(void __iomem *addr, unsigned offset, u8 data) { + trace_musb_writeb(__builtin_return_address(0), addr, offset, data); __raw_writeb(data, addr + offset); } static u16 musb_default_readw(const void __iomem *addr, unsigned offset) { - return __raw_readw(addr + offset); + u16 data = __raw_readw(addr + offset); + + trace_musb_readw(__builtin_return_address(0), addr, offset, data); + return data; } static void musb_default_writew(void __iomem *addr, unsigned offset, u16 data) { + trace_musb_writew(__builtin_return_address(0), addr, offset, data); __raw_writew(data, addr + offset); } static u32 musb_default_readl(const void __iomem *addr, unsigned offset) { - return __raw_readl(addr + offset); + u32 data = __raw_readl(addr + offset); + + trace_musb_readl(__builtin_return_address(0), addr, offset, data); + return data; } static void musb_default_writel(void __iomem *addr, unsigned offset, u32 data) { + trace_musb_writel(__builtin_return_address(0), addr, offset, data); __raw_writel(data, addr + offset); } -- cgit v1.2.3