[PATCH 1/1] fixing pwm-mxs period divider computation

[Gaetan Hug]

---
 drivers/pwm/pwm-mxs.c |    7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/pwm/pwm-mxs.c b/drivers/pwm/pwm-mxs.c
index f75ecb0..bbb2f8a 100644
--- a/drivers/pwm/pwm-mxs.c
+++ b/drivers/pwm/pwm-mxs.c
@@ -52,15 +52,18 @@ static int mxs_pwm_config(struct pwm_chip *chip, struct 
pwm_device *pwm,
        unsigned long rate;
        unsigned long long c;
 
+    unsigned const int cdiv[PERIOD_CDIV_MAX] = {1, 2, 4, 8, 16, 64, 256, 1024};
+
        rate = clk_get_rate(mxs->clk);
+
        while (1) {
-               c = rate / (1 << div);
+               c = rate / cdiv[div];
                c = c * period_ns;
                do_div(c, 1000000000);
                if (c < PERIOD_PERIOD_MAX)
                        break;
                div++;
-               if (div > PERIOD_CDIV_MAX)
+               if (div >= PERIOD_CDIV_MAX)
                        return -EINVAL;
        }
 
-- 
1.7.10.4

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