arch/arm64/boot/dts/rockchip/rk3399-gru-kevin-r4.dts

/*
 * Google Gru-Kevin Rev 4 board device tree source
 *
 * Copyright 2016 Google, Inc
 *
 * This file is dual-licensed: you can use it either under the terms
 * of the GPL or the X11 license, at your option. Note that this dual
 * licensing only applies to this file, and not this project as a
 * whole.
 *
 *  a) This file is free software; you can redistribute it and/or
 *     modify it under the terms of the GNU General Public License as
 *     published by the Free Software Foundation; either version 2 of the
 *     License, or (at your option) any later version.
 *
 *     This file is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *  Or, alternatively,
 *
 *  b) Permission is hereby granted, free of charge, to any person
 *     obtaining a copy of this software and associated documentation
 *     files (the "Software"), to deal in the Software without
 *     restriction, including without limitation the rights to use,
 *     copy, modify, merge, publish, distribute, sublicense, and/or
 *     sell copies of the Software, and to permit persons to whom the
 *     Software is furnished to do so, subject to the following
 *     conditions:
 *
 *     The above copyright notice and this permission notice shall be
 *     included in all copies or substantial portions of the Software.
 *
 *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
 *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
 *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *     OTHER DEALINGS IN THE SOFTWARE.
 */

/dts-v1/;
#include "rk3399-gru-kevin.dtsi"

/ {
	model = "Google Kevin";
	compatible = "google,kevin-rev4", "google,kevin",
		     "google,gru", "rockchip,rk3399";
};

/* Adjust DVFS rails back to wider range */

&ppvar_bigcpu {
	regulator-min-microvolt = <800000>;
	regulator-max-microvolt = <1500000>;
};

&ppvar_litcpu {
	regulator-min-microvolt = <800000>;
	regulator-max-microvolt = <1500000>;
};

&ppvar_gpu {
	regulator-min-microvolt = <800000>;
	regulator-max-microvolt = <1500000>;
};

&ppvar_centerlogic {
	regulator-min-microvolt = <800000>;
	regulator-max-microvolt = <1500000>;
};

/* HACK for -rev4 to bump up voltage to make factory test more stable.
 * issue:55602(issue:54814?)
 *
 * With the new OPPs of bit/lit cpu, it's now more stable when changing
 * frequencies from 2088M/1608M to 600M/408M. But after testing stressapptest
 * on 5pcs, there is 1/5 failed.
 *
 */

&ppvar_bigcpu {
	regulator-microvolt-offset = <50000>;
};
&ppvar_centerlogic {
	regulator-microvolt-offset = <50000>;
};
&ppvar_litcpu {
	regulator-microvolt-offset = <50000>;
};

/* No i2c-based TPM */
&ap_i2c_tpm {
	status = "disabled";
	/delete-node/ tpm@20;
};

&spi0 {
	status = "okay";

	cr50@0 {
		compatible = "google,cr50";
		reg = <0>;
		spi-max-frequency = <800000>; // TODO: review later
	};
};