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pwm: atmel: Fix duty cycle calculation in .get_state()

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[ Upstream commit 453e8b3d8e36ddcb283b3d1698864a03ea45599a ]

The CDTY register contains the number of inactive cycles. .apply() does
this correctly, however .get_state() got this wrong.

Fixes: 651b510a74 ("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>
This commit is contained in:
Uwe Kleine-König 2021-04-20 11:51:17 +02:00 committed by Greg Kroah-Hartman
parent 0a9decf2dd
commit b22e8f427c
1 changed files with 1 additions and 1 deletions
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drivers/pwm/pwm-atmel.c
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@ -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);