linux-kernel - [PATCH 12/18] arm64: dts: qcom: msm8994-octagon: Configure Lattice iCE40 FPGA

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Date:   Sun, 31 Jan 2021 02:38:43 +0100
From:   Konrad Dybcio <konrad.dybcio@...ainline.org>
To:     phone-devel@...r.kernel.org
Cc:     ~postmarketos/upstreaming@...ts.sr.ht,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Gustave Monce <gustave.monce@...look.com>
Subject: [PATCH 12/18] arm64: dts: qcom: msm8994-octagon: Configure Lattice iCE40 FPGA

From: Gustave Monce <gustave.monce@...look.com>

Octagon devices have a Lattice iCE40 FPGA connected over SPI.
Configure it.

Signed-off-by: Gustave Monce <gustave.monce@...look.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@...ainline.org>
---
 .../dts/qcom/msm8994-msft-lumia-octagon.dtsi  | 21 +++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/msm8994-msft-lumia-octagon.dtsi b/arch/arm64/boot/dts/qcom/msm8994-msft-lumia-octagon.dtsi
index 004a42261cef..73af5265df9b 100644
--- a/arch/arm64/boot/dts/qcom/msm8994-msft-lumia-octagon.dtsi
+++ b/arch/arm64/boot/dts/qcom/msm8994-msft-lumia-octagon.dtsi
@@ -304,6 +304,27 @@ &blsp1_uart2 {
 	status = "okay";
 };
 
+&blsp2_spi4 {
+	status = "okay";
+
+	/*
+	 * This device is a Lattice UC120 USB-C PD PHY.
+	 * It is actually a Lattice iCE40 FPGA pre-programmed by
+	 * the device firmware with a specific bitstream
+	 * enabling USB Type C PHY functionality.
+	 * Communication is done via a proprietary protocol over SPI.
+	 *
+	 * TODO: Once a proper driver is available, replace this.
+	 */
+	uc120: ice5lp2k@0 {
+		compatible = "lattice,ice40-fpga-mgr";
+		reg = <0>;
+		spi-max-frequency = <5000000>;
+		cdone-gpios = <&tlmm 95 GPIO_ACTIVE_HIGH>;
+		reset-gpios = <&pmi8994_gpios 4 GPIO_ACTIVE_LOW>;
+	};
+};
+
 &blsp2_uart2 {
 	status = "okay";
 
-- 
2.30.0