PCI: qcom: Make all optional clocks optional

The kernel is not a devicetree validator and does not need to re-encode
information which is already available in the devicetree.

This is specifically true for the optional PCIe clocks, some of which
are really interconnect clocks.

Treat also the 2.7.0 optional clocks as truly optional instead of
maintaining a list of clocks per compatible (including two compatible
strings for the two identical controllers on sm8450) just to validate
the devicetree.

Link: https://lore.kernel.org/r/20220714071348.6792-7-johan+linaro@kernel.orgSigned-off-by: Johan Hovold <johan+linaro@kernel.org>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Brian Masney <bmasney@redhat.com>
Acked-by: Stanimir Varbanov <svarbanov@mm-sol.com>

drivers/pci/controller/dwc/pcie-qcom.c

@@ -215,10 +215,6 @@ struct qcom_pcie_ops {
 
 struct qcom_pcie_cfg {
 	const struct qcom_pcie_ops *ops;
-	unsigned int has_tbu_clk:1;
-	unsigned int has_ddrss_sf_tbu_clk:1;
-	unsigned int has_aggre0_clk:1;
-	unsigned int has_aggre1_clk:1;
 };
 
 struct qcom_pcie {
@@ -1196,14 +1192,6 @@ static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie)
 	res->clks[idx++].id = "bus_master";
 	res->clks[idx++].id = "bus_slave";
 	res->clks[idx++].id = "slave_q2a";
-	if (pcie->cfg->has_tbu_clk)
-		res->clks[idx++].id = "tbu";
-	if (pcie->cfg->has_ddrss_sf_tbu_clk)
-		res->clks[idx++].id = "ddrss_sf_tbu";
-	if (pcie->cfg->has_aggre0_clk)
-		res->clks[idx++].id = "aggre0";
-	if (pcie->cfg->has_aggre1_clk)
-		res->clks[idx++].id = "aggre1";
 
 	num_clks = idx;
 
@@ -1211,6 +1199,10 @@ static int qcom_pcie_get_resources_2_7_0(struct qcom_pcie *pcie)
 	if (ret < 0)
 		return ret;
 
+	res->clks[idx++].id = "tbu";
+	res->clks[idx++].id = "ddrss_sf_tbu";
+	res->clks[idx++].id = "aggre0";
+	res->clks[idx++].id = "aggre1";
 	res->clks[idx++].id = "noc_aggr_4";
 	res->clks[idx++].id = "noc_aggr_south_sf";
 	res->clks[idx++].id = "cnoc_qx";
@@ -1635,17 +1627,14 @@ static const struct qcom_pcie_cfg ipq4019_cfg = {
 
 static const struct qcom_pcie_cfg sa8540p_cfg = {
 	.ops = &ops_1_9_0,
-	.has_ddrss_sf_tbu_clk = true,
 };
 
 static const struct qcom_pcie_cfg sc8280xp_cfg = {
 	.ops = &ops_1_9_0,
-	.has_ddrss_sf_tbu_clk = true,
 };
 
 static const struct qcom_pcie_cfg sdm845_cfg = {
 	.ops = &ops_2_7_0,
-	.has_tbu_clk = true,
 };
 
 static const struct qcom_pcie_cfg sm8150_cfg = {
@@ -1657,31 +1646,22 @@ static const struct qcom_pcie_cfg sm8150_cfg = {
 
 static const struct qcom_pcie_cfg sm8250_cfg = {
 	.ops = &ops_1_9_0,
-	.has_tbu_clk = true,
-	.has_ddrss_sf_tbu_clk = true,
 };
 
 static const struct qcom_pcie_cfg sm8450_pcie0_cfg = {
 	.ops = &ops_1_9_0,
-	.has_ddrss_sf_tbu_clk = true,
-	.has_aggre0_clk = true,
-	.has_aggre1_clk = true,
 };
 
 static const struct qcom_pcie_cfg sm8450_pcie1_cfg = {
 	.ops = &ops_1_9_0,
-	.has_ddrss_sf_tbu_clk = true,
-	.has_aggre1_clk = true,
 };
 
 static const struct qcom_pcie_cfg sc7280_cfg = {
 	.ops = &ops_1_9_0,
-	.has_tbu_clk = true,
 };
 
 static const struct qcom_pcie_cfg sc8180x_cfg = {
 	.ops = &ops_1_9_0,
-	.has_tbu_clk = true,
 };
 
 static const struct qcom_pcie_cfg ipq6018_cfg = {