interconnect: qcom: icc-rpmh: probe defer incase of missing QoS clock dependency

Return -EPROBE_DEFER from interconnect provider incase probe defer is
received from devm_clk_bulk_get_all(). This would help in reattempting
the inteconnect driver probe, once the required QoS clocks are
available.

Suggested-by: Bjorn Andersson <[email protected]>
Signed-off-by: Raviteja Laggyshetty <[email protected]>
Reviewed-by: Konrad Dybcio <[email protected]>
Fixes: 0a7be6b ("interconnect: qcom: icc-rpmh: Add QoS configuration support")
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Georgi Djakov <[email protected]>

Author: Raviteja Laggyshetty

drivers/interconnect/qcom/icc-rpmh.c

@@ -311,6 +311,9 @@ int qcom_icc_rpmh_probe(struct platform_device *pdev)
 		}
 
 		qp->num_clks = devm_clk_bulk_get_all(qp->dev, &qp->clks);
+		if (qp->num_clks == -EPROBE_DEFER)
+			return dev_err_probe(dev, qp->num_clks, "Failed to get QoS clocks\n");
+
 		if (qp->num_clks < 0 || (!qp->num_clks && desc->qos_clks_required)) {
 			dev_info(dev, "Skipping QoS, failed to get clk: %d\n", qp->num_clks);
 			goto skip_qos_config;