From 9e40ee18a1dc1623a5368d6232aaed52fd29dada Mon Sep 17 00:00:00 2001 From: Clemens Gruber Date: Fri, 7 May 2021 15:18:42 +0200 Subject: 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 Signed-off-by: Thierry Reding --- include/linux/pwm.h | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'include/linux/pwm.h') 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); } -- cgit v1.2.3