From 453e8b3d8e36ddcb283b3d1698864a03ea45599a Mon Sep 17 00:00:00 2001 From: Uwe Kleine-König Date: Tue, 20 Apr 2021 11:51:17 +0200 Subject: pwm: atmel: Fix duty cycle calculation in .get_state() MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The CDTY register contains the number of inactive cycles. .apply() does this correctly, however .get_state() got this wrong. Fixes: 651b510a74d4 ("pwm: atmel: Implement .get_state()") Signed-off-by: Uwe Kleine-König Signed-off-by: Thierry Reding --- drivers/pwm/pwm-atmel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/pwm') diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c index d49da708337f..ebaeb50dcfde 100644 --- a/drivers/pwm/pwm-atmel.c +++ b/drivers/pwm/pwm-atmel.c @@ -319,7 +319,7 @@ static void atmel_pwm_get_state(struct pwm_chip *chip, struct pwm_device *pwm, cdty = atmel_pwm_ch_readl(atmel_pwm, pwm->hwpwm, atmel_pwm->data->regs.duty); - tmp = (u64)cdty * NSEC_PER_SEC; + tmp = (u64)(cprd - cdty) * NSEC_PER_SEC; tmp <<= pres; state->duty_cycle = DIV64_U64_ROUND_UP(tmp, rate); -- cgit v1.2.3