On 04/23/2013 08:02 AM, Axel Lin wrote: > lpc32xx_pwm_config() is supposed to set duty_ns and period_ns, > it should not change PWM_ENABLE bit. > > Signed-off-by: Axel Lin <[email protected]>
Tested-by: Roland Stigge <[email protected]> > --- > drivers/pwm/pwm-lpc32xx.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/drivers/pwm/pwm-lpc32xx.c b/drivers/pwm/pwm-lpc32xx.c > index 1a5075e..e936202 100644 > --- a/drivers/pwm/pwm-lpc32xx.c > +++ b/drivers/pwm/pwm-lpc32xx.c > @@ -37,6 +37,7 @@ static int lpc32xx_pwm_config(struct pwm_chip *chip, struct > pwm_device *pwm, > struct lpc32xx_pwm_chip *lpc32xx = to_lpc32xx_pwm_chip(chip); > unsigned long long c; > int period_cycles, duty_cycles; > + u32 val; > > c = clk_get_rate(lpc32xx->clk) / 256; > c = c * period_ns; > @@ -68,8 +69,10 @@ static int lpc32xx_pwm_config(struct pwm_chip *chip, > struct pwm_device *pwm, > c = 255; > duty_cycles = 256 - c; > > - writel(PWM_ENABLE | PWM_RELOADV(period_cycles) | PWM_DUTY(duty_cycles), > - lpc32xx->base + (pwm->hwpwm << 2)); > + val = readl(lpc32xx->base + (pwm->hwpwm << 2)); > + val &= ~0xFFFF; > + val |= PWM_RELOADV(period_cycles) | PWM_DUTY(duty_cycles); > + writel(val, lpc32xx->base + (pwm->hwpwm << 2)); > > return 0; > } -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
