add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/arm/boot/dts/da850-lego-ev3.dts
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@@ -1,11 +1,8 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * Device tree for LEGO MINDSTORMS EV3
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  *
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  * Copyright (C) 2017 David Lechner <david@lechnology.com>
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- *
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- * This program is free software; you can redistribute  it and/or modify it
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- * under  the terms of  the GNU General  Public License as published by the
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- * Free Software Foundation, version 2.
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  */
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 /dts-v1/;
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@@ -125,6 +122,15 @@
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 		amp-supply = <&amp>;
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 	};
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+	cvdd: regulator0 {
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+		compatible = "regulator-fixed";
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+		regulator-name = "cvdd";
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+		regulator-min-microvolt = <1200000>;
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+		regulator-max-microvolt = <1200000>;
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+		regulator-always-on;
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+		regulator-boot-on;
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+	};
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+
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 	/*
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 	 * This is a 5V current limiting regulator that is shared by USB,
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 	 * the sensor (input) ports, the motor (output) ports and the A/DC.
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@@ -202,6 +208,27 @@
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 &ref_clk {
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 	clock-frequency = <24000000>;
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+};
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+
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+&cpu {
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+	cpu-supply = <&cvdd>;
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+};
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+
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+/* since we have a fixed regulator, we can't run at these points */
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+&opp_100 {
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+	status = "disabled";
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+};
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+
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+&opp_200 {
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+	status = "disabled";
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+};
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+
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+/*
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+ * The SoC is actually the 456MHz version, but because of the fixed regulator
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+ * This is the fastest we can go.
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+ */
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+&opp_375 {
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+	status = "okay";
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 };
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 &pmx_core {
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@@ -352,7 +379,8 @@
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 		compatible = "ti,ads7957";
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 		reg = <3>;
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 		#io-channel-cells = <1>;
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-		spi-max-frequency = <10000000>;
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+		spi-max-frequency = <1000000>;
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+		ti,spi-wdelay = <63>;
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 		vref-supply = <&adc_ref>;
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 	};
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 };