C++ (Cpp) arch_set_freq_scale示例

示例#1

文件： arm_big_little.c 项目： fxysunshine/Linux

/* Set clock frequency */
static int bL_cpufreq_set_target(struct cpufreq_policy *policy,
		unsigned int index)
{
	u32 cpu = policy->cpu, cur_cluster, new_cluster, actual_cluster;
	unsigned int freqs_new;
	int ret;

	cur_cluster = cpu_to_cluster(cpu);
	new_cluster = actual_cluster = per_cpu(physical_cluster, cpu);

	freqs_new = freq_table[cur_cluster][index].frequency;

	if (is_bL_switching_enabled()) {
		if ((actual_cluster == A15_CLUSTER) &&
				(freqs_new < clk_big_min)) {
			new_cluster = A7_CLUSTER;
		} else if ((actual_cluster == A7_CLUSTER) &&
				(freqs_new > clk_little_max)) {
			new_cluster = A15_CLUSTER;
		}
	}

	ret = bL_cpufreq_set_rate(cpu, actual_cluster, new_cluster, freqs_new);

	if (!ret) {
		arch_set_freq_scale(policy->related_cpus, freqs_new,
				    policy->cpuinfo.max_freq);
	}

	return ret;
}

示例#2

文件： scpi-cpufreq.c 项目： JamesChenFromChina/linux

static int
scpi_cpufreq_set_target(struct cpufreq_policy *policy, unsigned int index)
{
	unsigned long freq = policy->freq_table[index].frequency;
	struct scpi_data *priv = policy->driver_data;
	u64 rate = freq * 1000;
	int ret;

	ret = clk_set_rate(priv->clk, rate);

	if (ret)
		return ret;

	if (clk_get_rate(priv->clk) != rate)
		return -EIO;

	arch_set_freq_scale(policy->related_cpus, freq,
			    policy->cpuinfo.max_freq);

	return 0;
}