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 --- drivers/pwm/core.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'drivers/pwm/core.c') diff --git a/drivers/pwm/core.c b/drivers/pwm/core.c index c165c5822703..a42999f877d2 100644 --- a/drivers/pwm/core.c +++ b/drivers/pwm/core.c @@ -536,7 +536,8 @@ int pwm_apply_state(struct pwm_device *pwm, const struct pwm_state *state) if (state->period == pwm->state.period && state->duty_cycle == pwm->state.duty_cycle && state->polarity == pwm->state.polarity && - state->enabled == pwm->state.enabled) + state->enabled == pwm->state.enabled && + state->usage_power == pwm->state.usage_power) return 0; if (chip->ops->apply) { @@ -1241,6 +1242,9 @@ static void pwm_dbg_show(struct pwm_chip *chip, struct seq_file *s) seq_printf(s, " polarity: %s", state.polarity ? "inverse" : "normal"); + if (state.usage_power) + seq_puts(s, " usage_power"); + seq_puts(s, "\n"); } } -- cgit v1.2.3