From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: Sender: Castet Matthieu From: Matthieu CASTET Subject: [PATCH] pwm: Add tracepoint for apply state Date: Fri, 3 Aug 2018 16:00:29 +0200 Message-Id: <20180803140029.29810-1-matthieu.castet@parrot.com> List-ID: To: linux-pwm@vger.kernel.org Cc: Thierry Reding , Matthieu CASTET This allows to trace pwm with ftrace Signed-off-by: Matthieu Castet --- drivers/pwm/core.c | 5 ++++ include/trace/events/pwm.h | 48 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 53 insertions(+) create mode 100644 include/trace/events/pwm.h diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index 1581f6ab1b1f..4342974af31a 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -32,6 +32,9 @@ #include +#define CREATE_TRACE_POINTS +#include + #define MAX_PWMS 1024 static DEFINE_MUTEX(pwm_lookup_lock); @@ -475,6 +478,8 @@ int pwm_apply_state(struct pwm_device *pwm, struct pwm_state *state) if (!memcmp(state, &pwm->state, sizeof(*state))) return 0; + trace_pwm_apply_state(pwm, state); + if (pwm->chip->ops->apply) { err = pwm->chip->ops->apply(pwm->chip, pwm, state); if (err) diff --git a/include/trace/events/pwm.h b/include/trace/events/pwm.h new file mode 100644 index 000000000000..0c28a76b1f60 --- /dev/null +++ b/include/trace/events/pwm.h @@ -0,0 +1,48 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM pwm + +#if !defined(_TRACE_PWM_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_PWM_H + +#include +#include + + +TRACE_EVENT(pwm_apply_state, + + TP_PROTO(struct pwm_device *pwm, struct pwm_state *state), + + TP_ARGS(pwm, state), + + TP_STRUCT__entry( + __string(name, pwm->label) + __field(struct pwm_device *, pwm) + __field(unsigned int, num) + __field(unsigned int, period) + __field(unsigned int, duty_cycle) + __field(enum pwm_polarity, polarity) + __field(bool, enabled) + ), + + TP_fast_assign( + __assign_str(name, pwm->label); + __entry->pwm = pwm; + __entry->num = pwm->pwm; + __entry->period = state->period; + __entry->duty_cycle = state->duty_cycle; + __entry->polarity = state->polarity; + __entry->enabled = state->enabled; + ), + + TP_printk("%s: apply state struct pwm[%p]: pwm%u " + "enabled=%d polarity=%u period_ns=%u duty_ns=%u", + __get_str(name), __entry->pwm, __entry->num, + __entry->enabled, __entry->polarity, + __entry->period, __entry->duty_cycle) +); + +#endif /* _TRACE_PWM_H */ + +/* This part must be outside protection */ +#include -- 2.18.0