From: Uwe Kleine-König u.kleine-koenig@pengutronix.de
[ Upstream commit 453e8b3d8e36ddcb283b3d1698864a03ea45599a ]
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 u.kleine-koenig@pengutronix.de Signed-off-by: Thierry Reding thierry.reding@gmail.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pwm/pwm-atmel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/pwm/pwm-atmel.c b/drivers/pwm/pwm-atmel.c index 6161e7e3e9ac..d7cb0dfa25a5 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);