linux-kernel - [PATCH v2 4/7] PCI: qcom: Add support for IPQ9574

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Date: Tue,  9 Apr 2024 14:08:30 -0500
From: Alexandru Gagniuc <mr.nuke.me@...il.com>
To: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>,
	Bjorn Andersson <andersson@...nel.org>,
	Konrad Dybcio <konrad.dybcio@...aro.org>,
	Lorenzo Pieralisi <lpieralisi@...nel.org>,
	Krzysztof Wilczyński <kw@...ux.com>,
	Rob Herring <robh@...nel.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>
Cc: Alexandru Gagniuc <mr.nuke.me@...il.com>,
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
	linux-arm-msm@...r.kernel.org,
	linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/7] PCI: qcom: Add support for IPQ9574

Add support for the PCIe on IPQ9574. The main difference from ipq6018
is that the "iface" clock is not necessarry. Add a special case in
qcom_pcie_get_resources_2_9_0() to handle this.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@...il.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 drivers/pci/controller/dwc/pcie-qcom.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c
index 14772edcf0d3..10560d6d6336 100644
--- a/drivers/pci/controller/dwc/pcie-qcom.c
+++ b/drivers/pci/controller/dwc/pcie-qcom.c
@@ -1101,15 +1101,19 @@ static int qcom_pcie_get_resources_2_9_0(struct qcom_pcie *pcie)
 	struct qcom_pcie_resources_2_9_0 *res = &pcie->res.v2_9_0;
 	struct dw_pcie *pci = pcie->pci;
 	struct device *dev = pci->dev;
-	int ret;
+	int ret, num_clks = ARRAY_SIZE(res->clks) - 1;
 
-	res->clks[0].id = "iface";
+	res->clks[0].id = "rchng";
 	res->clks[1].id = "axi_m";
 	res->clks[2].id = "axi_s";
 	res->clks[3].id = "axi_bridge";
-	res->clks[4].id = "rchng";
 
-	ret = devm_clk_bulk_get(dev, ARRAY_SIZE(res->clks), res->clks);
+	if (!of_device_is_compatible(dev->of_node, "qcom,pcie-ipq9574")) {
+		res->clks[4].id = "iface";
+		num_clks++;
+	}
+
+	ret = devm_clk_bulk_get(dev, num_clks, res->clks);
 	if (ret < 0)
 		return ret;
 
@@ -1664,6 +1668,7 @@ static const struct of_device_id qcom_pcie_match[] = {
 	{ .compatible = "qcom,pcie-ipq8064-v2", .data = &cfg_2_1_0 },
 	{ .compatible = "qcom,pcie-ipq8074", .data = &cfg_2_3_3 },
 	{ .compatible = "qcom,pcie-ipq8074-gen3", .data = &cfg_2_9_0 },
+	{ .compatible = "qcom,pcie-ipq9574", .data = &cfg_2_9_0 },
 	{ .compatible = "qcom,pcie-msm8996", .data = &cfg_2_3_2 },
 	{ .compatible = "qcom,pcie-qcs404", .data = &cfg_2_4_0 },
 	{ .compatible = "qcom,pcie-sa8540p", .data = &cfg_sc8280xp },
-- 
2.40.1