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Tue, 28 Jul 2026 00:06:42 -0700 (PDT) X-Received: by 2002:a05:6a21:4c08:b0:3c3:becb:b705 with SMTP id adf61e73a8af0-3c8ac70867dmr1644465637.27.1785222402077; Tue, 28 Jul 2026 00:06:42 -0700 (PDT) Received: from hu-krichai-hyd.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-314bc3e1255sm59846776eec.4.2026.07.28.00.06.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 28 Jul 2026 00:06:41 -0700 (PDT) From: Krishna Chaitanya Chundru Date: Tue, 28 Jul 2026 12:36:14 +0530 Subject: [PATCH v4 2/3] arm64: dts: qcom: eliza-evk: Add PCIe0 with M.2 E key connector Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260728-eliza_evk-v4-2-decc7fe5246e@oss.qualcomm.com> References: <20260728-eliza_evk-v4-0-decc7fe5246e@oss.qualcomm.com> In-Reply-To: <20260728-eliza_evk-v4-0-decc7fe5246e@oss.qualcomm.com> To: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Manivannan Sadhasivam , Bartosz Golaszewski Cc: linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-pm@vger.kernel.org, Krishna Chaitanya Chundru , Konrad Dybcio X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; 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Enable the PCIe0 root port and its QMP PHY with the necessary RPMH regulator supplies. The M.2 slot's 3.3V supply rail is GPIO-controlled via a TCA9538 I/O expander on I2C4. The M.2 E key slot hosts a WLAN card connected over PCIe and a Bluetooth device connected over UART. Model the connector using the pcie-m2-e-connector binding, wiring the PCIe root port and UART5 for the respective interfaces. Reviewed-by: Konrad Dybcio Reviewed-by: Manivannan Sadhasivam Signed-off-by: Krishna Chaitanya Chundru --- arch/arm64/boot/dts/qcom/eliza-evk.dtsi | 116 ++++++++++++++++++++++++++++++++ arch/arm64/boot/dts/qcom/eliza.dtsi | 1 + 2 files changed, 117 insertions(+) diff --git a/arch/arm64/boot/dts/qcom/eliza-evk.dtsi b/arch/arm64/boot/dts/qcom/eliza-evk.dtsi index e47b24f8b827..b35fffb50976 100644 --- a/arch/arm64/boot/dts/qcom/eliza-evk.dtsi +++ b/arch/arm64/boot/dts/qcom/eliza-evk.dtsi @@ -11,6 +11,92 @@ aliases { chosen { stdout-path = "serial0:115200n8"; }; + + vreg_pcie_m_3p3: regulator-3p3 { + compatible = "regulator-fixed"; + + regulator-name = "vreg_3p3"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + + gpio = <&gpio_expander1 6 GPIO_ACTIVE_HIGH>; + enable-active-high; + }; + + connector-0 { + compatible = "pcie-m2-e-connector"; + vpcie3v3-supply = <&vreg_pcie_m_3p3>; + w-disable1-gpios = <&tlmm 35 GPIO_ACTIVE_LOW>; + w-disable2-gpios = <&pm8550vs_g_gpios 4 GPIO_ACTIVE_HIGH>; + + pinctrl-0 = <&m2_w_disable1>, <&m2_w_disable2>; + pinctrl-names = "default"; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + #address-cells = <1>; + #size-cells = <0>; + + m2_e_pcie_ep: endpoint@0 { + reg = <0>; + remote-endpoint = <&pcieport0_ep>; + }; + }; + + port@3 { + reg = <3>; + #address-cells = <1>; + #size-cells = <0>; + + m2_e_uart_ep: endpoint@0 { + reg = <0>; + remote-endpoint = <&uart5_ep>; + }; + }; + }; + }; +}; + +&i2c4 { + pinctrl-0 = <&qup_i2c4_data_clk>; + pinctrl-names = "default"; + + clock-frequency = <400000>; + + status = "okay"; + + gpio_expander1: gpio@3c { + compatible = "ti,tca9538"; + #gpio-cells = <2>; + gpio-controller; + reg = <0x3c>; + }; +}; + +&pcie0 { + status = "okay"; +}; + +&pcie0_phy { + vdda-phy-supply = <&vreg_l1k>; + vdda-pll-supply = <&vreg_l3k>; + + status = "okay"; +}; + +&pcie0_port0 { + wake-gpios = <&tlmm 114 GPIO_ACTIVE_LOW>; + reset-gpios = <&tlmm 78 GPIO_ACTIVE_LOW>; + + port { + pcieport0_ep: endpoint { + remote-endpoint = <&m2_e_pcie_ep>; + }; + }; }; &uart13 { @@ -18,3 +104,33 @@ &uart13 { status = "okay"; }; + +&uart5 { + status = "okay"; + + port { + uart5_ep: endpoint { + remote-endpoint = <&m2_e_uart_ep>; + }; + }; +}; + +&pm8550vs_g_gpios { + m2_w_disable2: m2-w-disable2-state { + pins = "gpio4"; + function = "normal"; + input-disable; + output-enable; + bias-disable; + power-source = <2>; + }; +}; + +&tlmm { + m2_w_disable1: m2-w-disable1-state { + pins = "gpio35"; + function = "gpio"; + drive-strength = <2>; + bias-pull-up; + }; +}; diff --git a/arch/arm64/boot/dts/qcom/eliza.dtsi b/arch/arm64/boot/dts/qcom/eliza.dtsi index a54a956531e5..c99bcccae00c 100644 --- a/arch/arm64/boot/dts/qcom/eliza.dtsi +++ b/arch/arm64/boot/dts/qcom/eliza.dtsi @@ -1909,6 +1909,7 @@ opp-8000000-3 { }; pcie0_port0: pcie@0 { + compatible = "pciclass,0604"; device_type = "pci"; reg = <0x0 0x0 0x0 0x0 0x0>; bus-range = <0x01 0xff>; -- 2.34.1