On Fri, Mar 18, 2022 at 01:41:33PM -0700, Jae Hyun Yoo wrote: > I2C slave events tracepoints can be enabled by: > > echo 1 > /sys/kernel/tracing/events/i2c_slave/enable > > and logs in /sys/kernel/tracing/trace will look like: > > ... i2c_slave: i2c-0 a=010 ret=0 WR_REQ [] > ... i2c_slave: i2c-0 a=010 ret=0 WR_RCV [02] > ... i2c_slave: i2c-0 a=010 ret=0 WR_RCV [0c] > ... i2c_slave: i2c-0 a=010 ret=0 STOP [] > ... i2c_slave: i2c-0 a=010 ret=0 RD_REQ [04] > ... i2c_slave: i2c-0 a=010 ret=0 RD_PRO [b4] > ... i2c_slave: i2c-0 a=010 ret=0 STOP [] > > formatted as: > > i2c-<adapter_nr> > a=<addr> > ret=<ret> <- callback return value > <event> > [<data>] > > trace printings can be selected by adding a filter like: > > echo adapter_nr==1 >/sys/kernel/tracing/events/i2c_slave/filter > > Signed-off-by: Jae Hyun Yoo <quic_jaehyoo@xxxxxxxxxxx> Applied to for-next, thanks!
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