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Date: Tue, 23 Apr 2013 14:02:49 +0800 From: Axel Lin <axel.lin@...ics.com> To: Thierry Reding <thierry.reding@...onic-design.de> Cc: Alexandre Pereira da Silva <aletes.xgr@...il.com>, Roland Stigge <stigge@...com.de>, linux-kernel@...r.kernel.org Subject: [RESEND][PATCH RFT 2/2] pwm: lpc32xx: Don't change PWM_ENABLE bit in lpc32xx_pwm_config lpc32xx_pwm_config() is supposed to set duty_ns and period_ns, it should not change PWM_ENABLE bit. Signed-off-by: Axel Lin <axel.lin@...ics.com> --- 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; } -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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