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authorUwe Kleine-König <u.kleine-koenig@pengutronix.de>2021-04-20 12:51:17 +0300
committerThierry Reding <thierry.reding@gmail.com>2021-04-23 20:05:31 +0300
commit453e8b3d8e36ddcb283b3d1698864a03ea45599a (patch)
tree6f26a1cd050780c0443f34a150777c37a1c74231 /drivers/pwm
parent721b595744f199c185fbcefaa6e7e5cea9da1941 (diff)
downloadlinux-453e8b3d8e36ddcb283b3d1698864a03ea45599a.tar.xz
pwm: atmel: Fix duty cycle calculation in .get_state()
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>
Diffstat (limited to 'drivers/pwm')
-rw-r--r--drivers/pwm/pwm-atmel.c2
1 files changed, 1 insertions, 1 deletions
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);