diff options
| author | Clemens Gruber <clemens.gruber@pqgruber.com> | 2021-05-07 15:18:42 +0200 |
|---|---|---|
| committer | Thierry Reding <thierry.reding@gmail.com> | 2021-06-04 11:43:52 +0200 |
| commit | 9e40ee18a1dc1623a5368d6232aaed52fd29dada (patch) | |
| tree | 64b448d33a1be29dc1543c7679cbe58ffc99643b /include/linux/pwm.h | |
| parent | 98761ce4b91b77e0602b1551d11925e817e8a9a5 (diff) | |
pwm: core: Support new usage_power setting in PWM state
If usage_power is set, the PWM driver is only required to maintain
the power output but has more freedom regarding signal form.
If supported, the signal can be optimized, for example to
improve EMI by phase shifting individual channels.
Signed-off-by: Clemens Gruber <clemens.gruber@pqgruber.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
Diffstat (limited to 'include/linux/pwm.h')
| -rw-r--r-- | include/linux/pwm.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/pwm.h b/include/linux/pwm.h index 5bb90af4997e..5a73251d28e3 100644 --- a/include/linux/pwm.h +++ b/include/linux/pwm.h @@ -54,12 +54,17 @@ enum { * @duty_cycle: PWM duty cycle (in nanoseconds) * @polarity: PWM polarity * @enabled: PWM enabled status + * @usage_power: If set, the PWM driver is only required to maintain the power + * output but has more freedom regarding signal form. + * If supported, the signal can be optimized, for example to + * improve EMI by phase shifting individual channels. */ struct pwm_state { u64 period; u64 duty_cycle; enum pwm_polarity polarity; bool enabled; + bool usage_power; }; /** @@ -188,6 +193,7 @@ static inline void pwm_init_state(const struct pwm_device *pwm, state->period = args.period; state->polarity = args.polarity; state->duty_cycle = 0; + state->usage_power = false; } /** @@ -558,6 +564,7 @@ static inline void pwm_apply_args(struct pwm_device *pwm) state.enabled = false; state.polarity = pwm->args.polarity; state.period = pwm->args.period; + state.usage_power = false; pwm_apply_state(pwm, &state); } |