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Message-Id: <20240531-x1e80100-dts-fixes-pcie6a-v1-2-1573ebcae1e8@linaro.org>
Date: Fri, 31 May 2024 20:00:32 +0300
From: Abel Vesa <abel.vesa@...aro.org>
To: Bjorn Andersson <andersson@...nel.org>,
Konrad Dybcio <konrad.dybcio@...aro.org>, Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Rajendra Nayak <quic_rjendra@...cinc.com>,
Sibi Sankar <quic_sibis@...cinc.com>
Cc: Johan Hovold <johan@...nel.org>, linux-arm-msm@...r.kernel.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Abel Vesa <abel.vesa@...aro.org>
Subject: [PATCH 2/2] arm64: dts: qcom: x1e80100: Make the PCIe 6a PHY
support 4 lanes mode
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@...aro.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@...8000 {
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@...c000 {
- 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@...c000 {
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
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