---
drivers/pwm/core.c | 68 ++++++++++++++++---
include/trace/events/pwm.h | 134 ++++++++++++++++++++++++++++++++++---
2 files changed, 183 insertions(+), 19 deletions(-)
diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c
index d64c033c4cb2..a2320ae77220 100644
--- a/drivers/pwm/core.c
+++ b/drivers/pwm/core.c
@@ -138,6 +138,52 @@ static int pwm_check_rounding(const struct pwm_waveform
*wf,
return 0;
}
+static int pwm_round_waveform_tohw(struct pwm_chip *chip, struct pwm_device *pwm,
+ const struct pwm_waveform *wf, void *wfhw)
+{
+ const struct pwm_ops *ops = chip->ops;
+ int ret;
+
+ ret = ops->round_waveform_tohw(chip, pwm, wf, wfhw);
+ trace_pwm_round_waveform_tohw(pwm, wf, wfhw, ret);
+
+ return ret;
+}
+
+static int pwm_round_waveform_fromhw(struct pwm_chip *chip, struct pwm_device
*pwm,
+ const void *wfhw, struct pwm_waveform *wf)
+{
+ const struct pwm_ops *ops = chip->ops;
+ int ret;
+
+ ret = ops->round_waveform_fromhw(chip, pwm, wfhw, wf);
+ trace_pwm_round_waveform_fromhw(pwm, wfhw, wf, ret);
+
+ return ret;
+}
+
+static int pwm_read_waveform(struct pwm_chip *chip, struct pwm_device *pwm,
void *wfhw)
+{
+ const struct pwm_ops *ops = chip->ops;
+ int ret;
+
+ ret = ops->read_waveform(chip, pwm, wfhw);
+ trace_pwm_read_waveform(pwm, wfhw, ret);
+
+ return ret;
+}
+
+static int pwm_write_waveform(struct pwm_chip *chip, struct pwm_device *pwm,
const void *wfhw)
+{
+ const struct pwm_ops *ops = chip->ops;
+ int ret;
+
+ ret = ops->write_waveform(chip, pwm, wfhw);
+ trace_pwm_write_waveform(pwm, wfhw, ret);
+
+ return ret;
+}
+
#define WFHWSIZE 20
static int pwm_get_waveform(struct pwm_device *pwm,
@@ -155,11 +201,11 @@ static int pwm_get_waveform(struct pwm_device *pwm,
if (!chip->operational)
return -ENODEV;
- err = ops->read_waveform(chip, pwm, &wfhw);
+ err = pwm_read_waveform(chip, pwm, &wfhw);
if (err)
return err;
- return ops->round_waveform_fromhw(chip, pwm, &wfhw, wf);
+ return pwm_round_waveform_fromhw(chip, pwm, &wfhw, wf);
}
/* Called with the pwmchip lock held */
@@ -180,12 +226,12 @@ static int __pwm_set_waveform(struct pwm_device *pwm,
wf->duty_offset >= wf->period_length))
return -EINVAL;
- err = ops->round_waveform_tohw(chip, pwm, wf, &wfhw);
+ err = pwm_round_waveform_tohw(chip, pwm, wf, &wfhw);
if (err)
return err;
if ((IS_ENABLED(CONFIG_PWM_DEBUG) || exact) && wf->period_length) {
- err = ops->round_waveform_fromhw(chip, pwm, &wfhw, &wf_rounded);
+ err = pwm_round_waveform_fromhw(chip, pwm, &wfhw, &wf_rounded);
if (err)
return err;
@@ -203,7 +249,7 @@ static int __pwm_set_waveform(struct pwm_device *pwm,
}
}
- err = ops->write_waveform(chip, pwm, &wfhw);
+ err = pwm_write_waveform(chip, pwm, &wfhw);
if (err)
return err;
@@ -213,12 +259,12 @@ static int __pwm_set_waveform(struct pwm_device *pwm,
if (IS_ENABLED(CONFIG_PWM_DEBUG) && ops->read_waveform &&
wf->period_length) {
struct pwm_waveform wf_set;
- err = ops->read_waveform(chip, pwm, &wfhw);
+ err = pwm_read_waveform(chip, pwm, &wfhw);
if (err)
/* maybe ignore? */
return err;
- err = ops->round_waveform_fromhw(chip, pwm, &wfhw, &wf_set);
+ err = pwm_round_waveform_fromhw(chip, pwm, &wfhw, &wf_set);
if (err)
/* maybe ignore? */
return err;
@@ -443,11 +489,11 @@ static int __pwm_apply(struct pwm_device *pwm, const
struct pwm_state *state)
* high.
*/
- err = ops->round_waveform_tohw(chip, pwm, &wf, &wfhw);
+ err = pwm_round_waveform_tohw(chip, pwm, &wf, &wfhw);
if (err)
return err;
- err = ops->write_waveform(chip, pwm, &wfhw);
+ err = pwm_write_waveform(chip, pwm, &wfhw);
if (err)
return err;
@@ -548,11 +594,11 @@ static int pwm_get_state_hw(struct pwm_device *pwm, struct pwm_state *state)
scoped_guard(pwmchip, chip) {
- ret = ops->read_waveform(chip, pwm, &wfhw);
+ ret = pwm_read_waveform(chip, pwm, &wfhw);
if (ret)
return ret;
- ret = ops->round_waveform_fromhw(chip, pwm, &wfhw, &wf);
+ ret = pwm_round_waveform_fromhw(chip, pwm, &wfhw, &wf);
if (ret)
return ret;
}
diff --git a/include/trace/events/pwm.h b/include/trace/events/pwm.h
index 8022701c446d..3b5b20d2aff0 100644
--- a/include/trace/events/pwm.h
+++ b/include/trace/events/pwm.h
@@ -8,15 +8,135 @@
#include <linux/pwm.h>
#include <linux/tracepoint.h>
+#define TP_PROTO_pwm(args...) \
+ TP_PROTO(struct pwm_device *pwm, args)
+
+#define TP_ARGS_pwm(args...)
\
+ TP_ARGS(pwm, args)
+
+#define TP_STRUCT__entry_pwm(args...)
\
+ TP_STRUCT__entry(
\
+ __field(unsigned int, chipid)
\
+ __field(unsigned int, hwpwm)
\
+ args)
+
+#define TP_fast_assign_pwm(args...)
\
+ TP_fast_assign(
\
+ __entry->chipid = pwm->chip->id; \
+ __entry->hwpwm = pwm->hwpwm;
\
+ args)
+
+#define TP_printk_pwm(fmt, args...)
\
+ TP_printk("pwmchip%u.%u: " fmt, __entry->chipid, __entry->hwpwm, args)
+
+#define __field_pwmwf(wf)
\
+ __field(u64, wf ## _period_length)
\
+ __field(u64, wf ## _duty_length)
\
+ __field(u64, wf ## _duty_offset)
\
+
+#define fast_assign_pwmwf(wf)
\
+ __entry->wf ## _period_length = wf->period_length;
\
+ __entry->wf ## _duty_length = wf->duty_length;
\
+ __entry->wf ## _duty_offset = wf->duty_offset
+
+#define printk_pwmwf_format(wf)
\
+ "%lld/%lld [+%lld]"
+
+#define printk_pwmwf_formatargs(wf)
\
+ __entry->wf ## _duty_length, __entry->wf ## _period_length, __entry->wf
## _duty_offset
+
+TRACE_EVENT(pwm_round_waveform_tohw,
+
+ TP_PROTO_pwm(const struct pwm_waveform *wf, void *wfhw, int err),
+
+ TP_ARGS_pwm(wf, wfhw, err),
+
+ TP_STRUCT__entry_pwm(
+ __field_pwmwf(wf)
+ __field(void *, wfhw)
+ __field(int, err)
+ ),
+
+ TP_fast_assign_pwm(
+ fast_assign_pwmwf(wf);
+ __entry->wfhw = wfhw;
+ __entry->err = err;
+ ),
+
+ TP_printk_pwm(printk_pwmwf_format(wf) " > %p err=%d",
+ printk_pwmwf_formatargs(wf), __entry->wfhw, __entry->err)
+);
+
+TRACE_EVENT(pwm_round_waveform_fromhw,
+
+ TP_PROTO_pwm(const void *wfhw, struct pwm_waveform *wf, int err),
+
+ TP_ARGS_pwm(wfhw, wf, err),
+
+ TP_STRUCT__entry_pwm(
+ __field(const void *, wfhw)
+ __field_pwmwf(wf)
+ __field(int, err)
+ ),
+
+ TP_fast_assign_pwm(
+ __entry->wfhw = wfhw;
+ fast_assign_pwmwf(wf);
+ __entry->err = err;
+ ),
+
+ TP_printk_pwm("%p > " printk_pwmwf_format(wf) " err=%d",
+ __entry->wfhw, printk_pwmwf_formatargs(wf), __entry->err)
+);
+
+TRACE_EVENT(pwm_read_waveform,
+
+ TP_PROTO_pwm(void *wfhw, int err),
+
+ TP_ARGS_pwm(wfhw, err),
+
+ TP_STRUCT__entry_pwm(
+ __field(void *, wfhw)
+ __field(int, err)
+ ),
+
+ TP_fast_assign_pwm(
+ __entry->wfhw = wfhw;
+ __entry->err = err;
+ ),
+
+ TP_printk_pwm("%p err=%d",
+ __entry->wfhw, __entry->err)
+);
+
+TRACE_EVENT(pwm_write_waveform,
+
+ TP_PROTO_pwm(const void *wfhw, int err),
+
+ TP_ARGS_pwm(wfhw, err),
+
+ TP_STRUCT__entry_pwm(
+ __field(const void *, wfhw)
+ __field(int, err)
+ ),
+
+ TP_fast_assign_pwm(
+ __entry->wfhw = wfhw;
+ __entry->err = err;
+ ),
+
+ TP_printk_pwm("%p err=%d",
+ __entry->wfhw, __entry->err)
+);
+
+
DECLARE_EVENT_CLASS(pwm,
TP_PROTO(struct pwm_device *pwm, const struct pwm_state *state, int err),
TP_ARGS(pwm, state, err),
- TP_STRUCT__entry(
- __field(unsigned int, chipid)
- __field(unsigned int, hwpwm)
+ TP_STRUCT__entry_pwm(
__field(u64, period)
__field(u64, duty_cycle)
__field(enum pwm_polarity, polarity)
@@ -24,9 +144,7 @@ DECLARE_EVENT_CLASS(pwm,
__field(int, err)
),
- TP_fast_assign(
- __entry->chipid = pwm->chip->id;
- __entry->hwpwm = pwm->hwpwm;
+ TP_fast_assign_pwm(
__entry->period = state->period;
__entry->duty_cycle = state->duty_cycle;
__entry->polarity = state->polarity;
@@ -34,8 +152,8 @@ DECLARE_EVENT_CLASS(pwm,
__entry->err = err;
),
- TP_printk("pwmchip%u.%u: period=%llu duty_cycle=%llu polarity=%d enabled=%d err=%d",
- __entry->chipid, __entry->hwpwm, __entry->period,
__entry->duty_cycle,
+ TP_printk_pwm("period=%llu duty_cycle=%llu polarity=%d enabled=%d
err=%d",
+ __entry->period, __entry->duty_cycle,
__entry->polarity, __entry->enabled, __entry->err)
);
