Merge branch 'sh/dwarf-unwinder' of git://github.com/mfleming/linux-2.6 into sh/dwarf...

[pandora-kernel.git] / arch / arm / plat-s3c24xx / pwm.c

diff --git a/arch/arm/plat-s3c24xx/pwm.c b/arch/arm/plat-s3c24xx/pwm.c
index ec56b88..82a6d4d 100644 (file)
--- a/arch/arm/plat-s3c24xx/pwm.c
+++ b/arch/arm/plat-s3c24xx/pwm.c
@@ -19,6 +19,8 @@
 #include <linux/io.h>
 #include <linux/pwm.h>
 
+#include <mach/irqs.h>
+
 #include <plat/devs.h>
 #include <plat/regs-timer.h>
 
@@ -244,6 +246,10 @@ 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);