static void actmon_isr_device()

in tegra30-devfreq.c [277:321]

• 29 lines of code
• 5 McCabe index (conditional complexity)

static void actmon_isr_device(struct tegra_devfreq *tegra,
			      struct tegra_devfreq_device *dev)
{
	u32 intr_status, dev_ctrl;

	dev->avg_count = device_readl(dev, ACTMON_DEV_AVG_COUNT);
	tegra_devfreq_update_avg_wmark(tegra, dev);

	intr_status = device_readl(dev, ACTMON_DEV_INTR_STATUS);
	dev_ctrl = device_readl(dev, ACTMON_DEV_CTRL);

	if (intr_status & ACTMON_DEV_INTR_CONSECUTIVE_UPPER) {
		/*
		 * new_boost = min(old_boost * up_coef + step, max_freq)
		 */
		dev->boost_freq = do_percent(dev->boost_freq,
					     dev->config->boost_up_coeff);
		dev->boost_freq += ACTMON_BOOST_FREQ_STEP;

		dev_ctrl |= ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;

		if (dev->boost_freq >= tegra->max_freq) {
			dev_ctrl &= ~ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;
			dev->boost_freq = tegra->max_freq;
		}
	} else if (intr_status & ACTMON_DEV_INTR_CONSECUTIVE_LOWER) {
		/*
		 * new_boost = old_boost * down_coef
		 * or 0 if (old_boost * down_coef < step / 2)
		 */
		dev->boost_freq = do_percent(dev->boost_freq,
					     dev->config->boost_down_coeff);

		dev_ctrl |= ACTMON_DEV_CTRL_CONSECUTIVE_ABOVE_WMARK_EN;

		if (dev->boost_freq < (ACTMON_BOOST_FREQ_STEP >> 1)) {
			dev_ctrl &= ~ACTMON_DEV_CTRL_CONSECUTIVE_BELOW_WMARK_EN;
			dev->boost_freq = 0;
		}
	}

	device_writel(dev, dev_ctrl, ACTMON_DEV_CTRL);

	device_writel(dev, ACTMON_INTR_STATUS_CLEAR, ACTMON_DEV_INTR_STATUS);
}