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authorDavid S. Miller <davem@davemloft.net>2012-01-02 18:56:49 -0500
committerDavid S. Miller <davem@davemloft.net>2012-01-02 18:56:49 -0500
commit455ffa607f0efa90c9fec99604553b7cdd5274b2 (patch)
tree6ff12c853b4a26612ceea8191a8eae29b130b670 /arch/arm/plat-mxc/pwm.c
parent3ab0b245aa550ea4670d096092ca8e8d5e14ac89 (diff)
parent115e8e705e4be071b9e06ff72578e3b603f2ba65 (diff)
downloadlinux-linaro-stable-455ffa607f0efa90c9fec99604553b7cdd5274b2.tar.gz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'arch/arm/plat-mxc/pwm.c')
-rw-r--r--arch/arm/plat-mxc/pwm.c9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arm/plat-mxc/pwm.c b/arch/arm/plat-mxc/pwm.c
index 845de59f07ed..e032717f7d02 100644
--- a/arch/arm/plat-mxc/pwm.c
+++ b/arch/arm/plat-mxc/pwm.c
@@ -77,6 +77,15 @@ int pwm_config(struct pwm_device *pwm, int duty_ns, int period_ns)
do_div(c, period_ns);
duty_cycles = c;
+ /*
+ * according to imx pwm RM, the real period value should be
+ * PERIOD value in PWMPR plus 2.
+ */
+ if (period_cycles > 2)
+ period_cycles -= 2;
+ else
+ period_cycles = 0;
+
writel(duty_cycles, pwm->mmio_base + MX3_PWMSAR);
writel(period_cycles, pwm->mmio_base + MX3_PWMPR);