linux-kernel - Re: [PWM PATCH 2/5] Emulates PWM hardware using a high-resolution timer and a GPIO pin

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Date:	Thu, 11 Feb 2010 21:07:02 +0100
From:	Pavel Machek <pavel@....cz>
To:	Bill Gatliff <bgat@...lgatliff.com>
Cc:	linux-embedded@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PWM PATCH 2/5] Emulates PWM hardware using a high-resolution
	timer and a GPIO pin


> +static void
> +gpio_pwm_work (struct work_struct *work)
> +{
> +	struct gpio_pwm *gp = container_of(work, struct gpio_pwm, work);
> +
> +	if (gp->active)
> +		gpio_direction_output(gp->gpio, gp->polarity ? 1 : 0);
> +	else
> +		gpio_direction_output(gp->gpio, gp->polarity ? 0 : 1);
> +}

...polarity ^ active ?

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