diff options
Diffstat (limited to 'arch/arm/plat-s3c/pwm.c')
| -rw-r--r-- | arch/arm/plat-s3c/pwm.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/plat-s3c/pwm.c b/arch/arm/plat-s3c/pwm.c index f3d37ac5595b..4fdc5b307fd2 100644 --- a/arch/arm/plat-s3c/pwm.c +++ b/arch/arm/plat-s3c/pwm.c @@ -247,6 +247,10 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns) tcmp = duty_ns / tin_ns; tcmp = tcnt - tcmp; + /* the pwm hw only checks the compare register after a decrement, + so the pin never toggles if tcmp = tcnt */ + if (tcmp == tcnt) + tcmp--; pwm_dbg(pwm, "tin_ns=%lu, tcmp=%ld/%lu\n", tin_ns, tcmp, tcnt); |