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From: Abel Vesa <abel.vesa@linaro.org>
Date: Fri, 31 May 2024 20:00:32 +0300
Subject: [PATCH 2/2] arm64: dts: qcom: x1e80100: Make the PCIe 6a PHY
 support 4 lanes mode
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Message-Id: <20240531-x1e80100-dts-fixes-pcie6a-v1-2-1573ebcae1e8@linaro.org>
References: <20240531-x1e80100-dts-fixes-pcie6a-v1-0-1573ebcae1e8@linaro.org>
In-Reply-To: <20240531-x1e80100-dts-fixes-pcie6a-v1-0-1573ebcae1e8@linaro.org>
To: Bjorn Andersson <andersson@kernel.org>, 
 Konrad Dybcio <konrad.dybcio@linaro.org>, Rob Herring <robh@kernel.org>, 
 Krzysztof Kozlowski <krzk+dt@kernel.org>, 
 Conor Dooley <conor+dt@kernel.org>, 
 Rajendra Nayak <quic_rjendra@quicinc.com>, 
 Sibi Sankar <quic_sibis@quicinc.com>
Cc: Johan Hovold <johan@kernel.org>, linux-arm-msm@vger.kernel.org, 
 devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, 
 Abel Vesa <abel.vesa@linaro.org>

So the PCIe 6 can be configured in 4-lane mode or 2-lane mode. For
4-lane mode, it fetches the lanes provided by PCIe 6b. For 2-lane mode,
PCIe 6a uses 2 lanes and then PCIe 6b uses the other 2 lanes. Configure
it in 4-lane mode and then each board can configure it depending on the
design. Both the QCP and CRD boards, currently upstream, use the 6a for
NVMe in 4-lane mode. Also, mark the controller as 4-lane as well.

Fixes: 5eb83fc10289 ("arm64: dts: qcom: x1e80100: Add PCIe nodes")
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
---
 arch/arm64/boot/dts/qcom/x1e80100.dtsi | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/x1e80100.dtsi b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
index fe7ca2a73f9d..17e4c5cda22d 100644
--- a/arch/arm64/boot/dts/qcom/x1e80100.dtsi
+++ b/arch/arm64/boot/dts/qcom/x1e80100.dtsi
@@ -2838,7 +2838,7 @@ pcie6a: pci@1bf8000 {
 			dma-coherent;
 
 			linux,pci-domain = <7>;
-			num-lanes = <2>;
+			num-lanes = <4>;
 
 			interrupts = <GIC_SPI 773 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 774 IRQ_TYPE_LEVEL_HIGH>,
@@ -2903,19 +2903,21 @@ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
 		};
 
 		pcie6a_phy: phy@1bfc000 {
-			compatible = "qcom,x1e80100-qmp-gen4x2-pcie-phy";
-			reg = <0 0x01bfc000 0 0x2000>;
+			compatible = "qcom,x1e80100-qmp-gen4x4-pcie-phy";
+			reg = <0 0x01bfc000 0 0x2000>,
+			      <0 0x01bfe000 0 0x2000>;
 
 			clocks = <&gcc GCC_PCIE_6A_PHY_AUX_CLK>,
 				 <&gcc GCC_PCIE_6A_CFG_AHB_CLK>,
 				 <&rpmhcc RPMH_CXO_CLK>,
 				 <&gcc GCC_PCIE_6A_PHY_RCHNG_CLK>,
-				 <&gcc GCC_PCIE_6A_PIPE_CLK>;
+				 <&gcc GCC_PCIE_6A_PIPEDIV2_CLK>;
 			clock-names = "aux",
 				      "cfg_ahb",
 				      "ref",
 				      "rchng",
-				      "pipe";
+				      "pipe",
+				      "pipediv2";
 
 			resets = <&gcc GCC_PCIE_6A_PHY_BCR>,
 				 <&gcc GCC_PCIE_6A_NOCSR_COM_PHY_BCR>;
@@ -2927,6 +2929,8 @@ pcie6a_phy: phy@1bfc000 {
 
 			power-domains = <&gcc GCC_PCIE_6_PHY_GDSC>;
 
+			qcom,4ln-config-sel = <&tcsr 0x1a000 0>;
+
 			#clock-cells = <0>;
 			clock-output-names = "pcie6a_pipe_clk";
 

-- 
2.34.1