linux-kernel - Re: [PATCH] pwm: lpc32xx

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Message-ID: <CAAAP30F1aGZ7-FyjV5pLq9vPLARWA_bb6cPGB9EnnQk0QKMKBg@mail.gmail.com>
Date:	Wed, 7 Nov 2012 13:58:22 -0200
From:	Alexandre Pereira da Silva <aletes.xgr@...il.com>
To:	Alban Bedel <alban.bedel@...onic-design.de>
Cc:	Thierry Reding <thierry.reding@...onic-design.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Roland Stigge <stigge@...com.de>
Subject: Re: [PATCH] pwm: lpc32xx - Fix the PWM polarity

On Wed, Nov 7, 2012 at 1:25 PM, Alban Bedel
<alban.bedel@...onic-design.de> wrote:
> Signed-off-by: Alban Bedel <alban.bedel@...onic-design.de>

Acked-by: Alexandre Pereira da Silva <aletes.xgr@...il.com>

> ---
>  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..0dc278d 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 == 0)
> +               c = 256;
> +       if (c > 255)
> +               c = 255;
> +       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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