Ejemplos de MUX_DIV_SHIFT en C++ (Cpp)

Ejemplo n.º 1

Archivo: pwm.c Proyecto: laurenmleiter/u-boot-chromebook

int pwm_init(int pwm_id, int div, int invert)
{
	u32 val;
	const struct s5p_timer *pwm =
			(struct s5p_timer *)samsung_get_base_timer();
	unsigned long ticks_per_period;
	unsigned int offset, prescaler;

	/*
	 * Timer Freq(HZ) =
	 *	PWM_CLK / { (prescaler_value + 1) * (divider_value) }
	 */

	val = readl(&pwm->tcfg0);
	if (pwm_id < 2) {
		prescaler = PRESCALER_0;
		val &= ~0xff;
		val |= (prescaler & 0xff);
	} else {
		prescaler = PRESCALER_1;
		val &= ~(0xff << 8);
		val |= (prescaler & 0xff) << 8;
	}
	writel(val, &pwm->tcfg0);
	val = readl(&pwm->tcfg1);
	val &= ~(0xf << MUX_DIV_SHIFT(pwm_id));
	val |= (div & 0xf) << MUX_DIV_SHIFT(pwm_id);
	writel(val, &pwm->tcfg1);


	if (pwm_id == 4) {
		/*
		 * TODO(sjg): Use this as a countdown timer for now. We count
		 * down from the maximum value to 0, then reset.
		 */
		ticks_per_period = -1UL;
	} else {
		const unsigned long pwm_hz = 1000;
		unsigned long timer_rate_hz = clock_get_periph_rate(
			PERIPH_ID_PWM0) / ((prescaler + 1) * (1 << div));

		ticks_per_period = timer_rate_hz / pwm_hz;
	}

	/* set count value */
	offset = pwm_id * 3;

	writel(ticks_per_period, &pwm->tcntb0 + offset);

	val = readl(&pwm->tcon) & ~(0xf << TCON_OFFSET(pwm_id));
	if (invert && (pwm_id < 4))
		val |= TCON_INVERTER(pwm_id);
	writel(val, &pwm->tcon);

	pwm_enable(pwm_id);

	return 0;
}

Ejemplo n.º 2

Archivo: pwm.c Proyecto: monojo/xu3

int pwm_init(int pwm_id, int div, int invert)
{
	u32 val;
	const struct s5p_timer *pwm =
			(struct s5p_timer *)samsung_get_base_timer();
	unsigned long timer_rate_hz;
	unsigned int offset, prescaler;

	/*
	 * Timer Freq(HZ) =
	 *	PWM_CLK / { (prescaler_value + 1) * (divider_value) }
	 */

	val = readl(&pwm->tcfg0);
	if (pwm_id < 2) {
		prescaler = PRESCALER_0;
		val &= ~0xff;
		val |= (prescaler & 0xff);
	} else {
		prescaler = PRESCALER_1;
		val &= ~(0xff << 8);
		val |= (prescaler & 0xff) << 8;
	}
	writel(val, &pwm->tcfg0);
	val = readl(&pwm->tcfg1);
	val &= ~(0xf << MUX_DIV_SHIFT(pwm_id));
	val |= (div & 0xf) << MUX_DIV_SHIFT(pwm_id);
	writel(val, &pwm->tcfg1);

#if defined(CONFIG_CPU_EXYNOS5410)
	timer_rate_hz = 2500000;
#elif defined(CONFIG_CPU_EXYNOS5420)
	timer_rate_hz = 1800000;
#else
	timer_rate_hz = get_pwm_clk() / ((prescaler + 1) *
			(div + 1));
#endif

	timer_rate_hz = timer_rate_hz / 100;

	/* set count value */
	offset = pwm_id * 3;
	timer_rate_hz = -1;
	writel(timer_rate_hz, &pwm->tcntb0 + offset);

	val = readl(&pwm->tcon) & ~(0xf << TCON_OFFSET(pwm_id));
	if (invert && (pwm_id < 4))
		val |= TCON_INVERTER(pwm_id);
	writel(val, &pwm->tcon);

	pwm_enable(pwm_id);

	return 0;
}