static void get_freq_range()

in devfreq.c [122:160]

• 27 lines of code
• 4 McCabe index (conditional complexity)

static void get_freq_range(struct devfreq *devfreq,
			   unsigned long *min_freq,
			   unsigned long *max_freq)
{
	unsigned long *freq_table = devfreq->profile->freq_table;
	s32 qos_min_freq, qos_max_freq;

	lockdep_assert_held(&devfreq->lock);

	/*
	 * Initialize minimum/maximum frequency from freq table.
	 * The devfreq drivers can initialize this in either ascending or
	 * descending order and devfreq core supports both.
	 */
	if (freq_table[0] < freq_table[devfreq->profile->max_state - 1]) {
		*min_freq = freq_table[0];
		*max_freq = freq_table[devfreq->profile->max_state - 1];
	} else {
		*min_freq = freq_table[devfreq->profile->max_state - 1];
		*max_freq = freq_table[0];
	}

	/* Apply constraints from PM QoS */
	qos_min_freq = dev_pm_qos_read_value(devfreq->dev.parent,
					     DEV_PM_QOS_MIN_FREQUENCY);
	qos_max_freq = dev_pm_qos_read_value(devfreq->dev.parent,
					     DEV_PM_QOS_MAX_FREQUENCY);
	*min_freq = max(*min_freq, (unsigned long)HZ_PER_KHZ * qos_min_freq);
	if (qos_max_freq != PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE)
		*max_freq = min(*max_freq,
				(unsigned long)HZ_PER_KHZ * qos_max_freq);

	/* Apply constraints from OPP interface */
	*min_freq = max(*min_freq, devfreq->scaling_min_freq);
	*max_freq = min(*max_freq, devfreq->scaling_max_freq);

	if (*min_freq > *max_freq)
		*min_freq = *max_freq;
}