[PATCH] pwm: lpc32xx - Fix the PWM polarity

From: Alban Bedel
Date: Mon Nov 05 2012 - 11:48:35 EST


Signed-off-by: Alban Bedel <alban.bedel@xxxxxxxxxxxxxxxxx>
---
drivers/pwm/pwm-lpc32xx.c | 6 +++++-
1 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/drivers/pwm/pwm-lpc32xx.c b/drivers/pwm/pwm-lpc32xx.c
index adb87f0..a2704b8 100644
--- a/drivers/pwm/pwm-lpc32xx.c
+++ b/drivers/pwm/pwm-lpc32xx.c
@@ -51,7 +51,11 @@ static int lpc32xx_pwm_config(struct pwm_chip *chip, struct pwm_device *pwm,

c = 256 * duty_ns;
do_div(c, period_ns);
- duty_cycles = c;
+ if (c > 255)
+ c = 255;
+ if (c < 1)
+ c = 1;
+ duty_cycles = 256 - c;

writel(PWM_ENABLE | PWM_RELOADV(period_cycles) | PWM_DUTY(duty_cycles),
lpc32xx->base + (pwm->hwpwm << 2));
--
1.7.0.4

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