static int pas_cpufreq_cpu_init()

in pasemi-cpufreq.c [125:206]

• 69 lines of code
• 11 McCabe index (conditional complexity)

static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
{
	struct cpufreq_frequency_table *pos;
	const u32 *max_freqp;
	u32 max_freq;
	int cur_astate, idx;
	struct resource res;
	struct device_node *cpu, *dn;
	int err = -ENODEV;

	cpu = of_get_cpu_node(policy->cpu, NULL);
	if (!cpu)
		goto out;

	max_freqp = of_get_property(cpu, "clock-frequency", NULL);
	of_node_put(cpu);
	if (!max_freqp) {
		err = -EINVAL;
		goto out;
	}

	/* we need the freq in kHz */
	max_freq = *max_freqp / 1000;

	dn = of_find_compatible_node(NULL, NULL, "1682m-sdc");
	if (!dn)
		dn = of_find_compatible_node(NULL, NULL,
					     "pasemi,pwrficient-sdc");
	if (!dn)
		goto out;
	err = of_address_to_resource(dn, 0, &res);
	of_node_put(dn);
	if (err)
		goto out;
	sdcasr_mapbase = ioremap(res.start + SDCASR_OFFSET, 0x2000);
	if (!sdcasr_mapbase) {
		err = -EINVAL;
		goto out;
	}

	dn = of_find_compatible_node(NULL, NULL, "1682m-gizmo");
	if (!dn)
		dn = of_find_compatible_node(NULL, NULL,
					     "pasemi,pwrficient-gizmo");
	if (!dn) {
		err = -ENODEV;
		goto out_unmap_sdcasr;
	}
	err = of_address_to_resource(dn, 0, &res);
	of_node_put(dn);
	if (err)
		goto out_unmap_sdcasr;
	sdcpwr_mapbase = ioremap(res.start, 0x1000);
	if (!sdcpwr_mapbase) {
		err = -EINVAL;
		goto out_unmap_sdcasr;
	}

	pr_debug("init cpufreq on CPU %d\n", policy->cpu);
	pr_debug("max clock-frequency is at %u kHz\n", max_freq);
	pr_debug("initializing frequency table\n");

	/* initialize frequency table */
	cpufreq_for_each_entry_idx(pos, pas_freqs, idx) {
		pos->frequency = get_astate_freq(pos->driver_data) * 100000;
		pr_debug("%d: %d\n", idx, pos->frequency);
	}

	cur_astate = get_cur_astate(policy->cpu);
	pr_debug("current astate is at %d\n",cur_astate);

	policy->cur = pas_freqs[cur_astate].frequency;
	ppc_proc_freq = policy->cur * 1000ul;

	cpufreq_generic_init(policy, pas_freqs, get_gizmo_latency());
	return 0;

out_unmap_sdcasr:
	iounmap(sdcasr_mapbase);
out:
	return err;
}