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| author | Uwe Kleine-König <u.kleine-koenig@pengutronix.de> | 2021-04-20 11:51:17 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-05-19 10:13:04 +0200 |
| commit | b22e8f427c3de299c47350caae2a4f80f6d7eb61 (patch) | |
| tree | 4f504c49e3c9f53dca04cd6f55b21af03c02bbba | |
| parent | 0a9decf2dd4d859bdc791165abc2b646a85dd00f (diff) | |
| download | linux-stable-b22e8f427c3de299c47350caae2a4f80f6d7eb61.tar.gz linux-stable-b22e8f427c3de299c47350caae2a4f80f6d7eb61.tar.bz2 linux-stable-b22e8f427c3de299c47350caae2a4f80f6d7eb61.zip | |
pwm: atmel: Fix duty cycle calculation in .get_state()
[ 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>
| -rw-r--r-- | drivers/pwm/pwm-atmel.c | 2 |
1 files changed, 1 insertions, 1 deletions
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); |