static int qcom_icc_set()

in qcom/icc-rpm.c [236:292]

• 45 lines of code
• 8 McCabe index (conditional complexity)

static int qcom_icc_set(struct icc_node *src, struct icc_node *dst)
{
	struct qcom_icc_provider *qp;
	struct qcom_icc_node *qn;
	struct icc_provider *provider;
	struct icc_node *n;
	u64 sum_bw;
	u64 max_peak_bw;
	u64 rate;
	u32 agg_avg = 0;
	u32 agg_peak = 0;
	int ret, i;

	qn = src->data;
	provider = src->provider;
	qp = to_qcom_provider(provider);

	list_for_each_entry(n, &provider->nodes, node_list)
		provider->aggregate(n, 0, n->avg_bw, n->peak_bw,
				    &agg_avg, &agg_peak);

	sum_bw = icc_units_to_bps(agg_avg);
	max_peak_bw = icc_units_to_bps(agg_peak);

	if (!qn->qos.ap_owned) {
		/* send bandwidth request message to the RPM processor */
		ret = qcom_icc_rpm_set(qn->mas_rpm_id, qn->slv_rpm_id, sum_bw);
		if (ret)
			return ret;
	} else if (qn->qos.qos_mode != -1) {
		/* set bandwidth directly from the AP */
		ret = qcom_icc_qos_set(src, sum_bw);
		if (ret)
			return ret;
	}

	rate = max(sum_bw, max_peak_bw);

	do_div(rate, qn->buswidth);
	rate = min_t(u64, rate, LONG_MAX);

	if (qn->rate == rate)
		return 0;

	for (i = 0; i < qp->num_clks; i++) {
		ret = clk_set_rate(qp->bus_clks[i].clk, rate);
		if (ret) {
			pr_err("%s clk_set_rate error: %d\n",
			       qp->bus_clks[i].id, ret);
			return ret;
		}
	}

	qn->rate = rate;

	return 0;
}