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authorRussell King <rmk@dyn-67.arm.linux.org.uk>2009-09-12 15:04:37 +0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2009-09-12 15:04:37 +0400
commit87d721ad7a37b7650dd710c88dd5c6a5bf9fe996 (patch)
tree869d633803eb7c429624d3bd16a6117816849763 /arch/arm/plat-s3c
parentddd559b13f6d2fe3ad68c4b3f5235fd3c2eae4e3 (diff)
parentb7cfda9fc3d7aa60cffab5367f2a72a4a70060cd (diff)
downloadlinux-87d721ad7a37b7650dd710c88dd5c6a5bf9fe996.tar.xz
Merge branch 'master' into devel
Diffstat (limited to 'arch/arm/plat-s3c')
-rw-r--r--arch/arm/plat-s3c/pwm.c4
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);