linux/arch/arm/boot/dts/sun8i-h3.dtsi
Icenowy Zheng dceecd9134 ARM: dts: sun8i: h3: add operating-points-v2 table for CPU
The CPU on Allwinner H3 can do dynamic frequency scaling.

Add a DVFS table based on the one shipped with Allwinner's H3 SDK. The
voltage-frequency relationship seems to be conservative, and Armbian has
another DVFS table which uses lower voltage at a certain frequency.
However, the official one is chosen for safety.

Frequencies higher than 1008MHz are temporarily dropped in the table, as
they may lead to over voltage on boards without proper regulator
settings or over temperature on boards with proper regulator settings.
They will be added back once regulator settings are ready and thermal
sensor driver is merged.

In order to satisfy all different regulators (SY8106A which is 50mV per
level, SY8113B which have two states: 1.1V and 1.3V, and some board with
non-tweakable regulators), all the OPPs are defined with a range which has
the target value as the minimum allowed value, and 1.3V (the highest
VDD-CPUX voltage suggested by the datasheet) as the maximum allowed value.
It's proven to work well with a board with SY8113B.

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
2018-04-20 14:39:16 +08:00

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/*
* Copyright (C) 2015 Jens Kuske <jenskuske@gmail.com>
*
* 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.
*/
#include "sunxi-h3-h5.dtsi"
/ {
cpu0_opp_table: opp_table0 {
compatible = "operating-points-v2";
opp-shared;
opp@648000000 {
opp-hz = /bits/ 64 <648000000>;
opp-microvolt = <1040000 1040000 1300000>;
clock-latency-ns = <244144>; /* 8 32k periods */
};
opp@816000000 {
opp-hz = /bits/ 64 <816000000>;
opp-microvolt = <1100000 1100000 1300000>;
clock-latency-ns = <244144>; /* 8 32k periods */
};
opp@1008000000 {
opp-hz = /bits/ 64 <1008000000>;
opp-microvolt = <1200000 1200000 1300000>;
clock-latency-ns = <244144>; /* 8 32k periods */
};
};
cpus {
#address-cells = <1>;
#size-cells = <0>;
cpu0: cpu@0 {
compatible = "arm,cortex-a7";
device_type = "cpu";
reg = <0>;
clocks = <&ccu CLK_CPUX>;
clock-names = "cpu";
operating-points-v2 = <&cpu0_opp_table>;
#cooling-cells = <2>;
};
cpu@1 {
compatible = "arm,cortex-a7";
device_type = "cpu";
reg = <1>;
operating-points-v2 = <&cpu0_opp_table>;
};
cpu@2 {
compatible = "arm,cortex-a7";
device_type = "cpu";
reg = <2>;
operating-points-v2 = <&cpu0_opp_table>;
};
cpu@3 {
compatible = "arm,cortex-a7";
device_type = "cpu";
reg = <3>;
operating-points-v2 = <&cpu0_opp_table>;
};
};
timer {
compatible = "arm,armv7-timer";
interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
<GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
};
soc {
mali: gpu@1c40000 {
compatible = "allwinner,sun8i-h3-mali", "arm,mali-400";
reg = <0x01c40000 0x10000>;
interrupts = <GIC_SPI 97 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 99 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 102 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 103 IRQ_TYPE_LEVEL_HIGH>,
<GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = "gp",
"gpmmu",
"pp0",
"ppmmu0",
"pp1",
"ppmmu1",
"pmu";
clocks = <&ccu CLK_BUS_GPU>, <&ccu CLK_GPU>;
clock-names = "bus", "core";
resets = <&ccu RST_BUS_GPU>;
assigned-clocks = <&ccu CLK_GPU>;
assigned-clock-rates = <384000000>;
};
};
};
&ccu {
compatible = "allwinner,sun8i-h3-ccu";
};
&display_clocks {
compatible = "allwinner,sun8i-h3-de2-clk";
};
&mmc0 {
compatible = "allwinner,sun7i-a20-mmc";
clocks = <&ccu CLK_BUS_MMC0>,
<&ccu CLK_MMC0>,
<&ccu CLK_MMC0_OUTPUT>,
<&ccu CLK_MMC0_SAMPLE>;
clock-names = "ahb",
"mmc",
"output",
"sample";
};
&mmc1 {
compatible = "allwinner,sun7i-a20-mmc";
clocks = <&ccu CLK_BUS_MMC1>,
<&ccu CLK_MMC1>,
<&ccu CLK_MMC1_OUTPUT>,
<&ccu CLK_MMC1_SAMPLE>;
clock-names = "ahb",
"mmc",
"output",
"sample";
};
&mmc2 {
compatible = "allwinner,sun7i-a20-mmc";
clocks = <&ccu CLK_BUS_MMC2>,
<&ccu CLK_MMC2>,
<&ccu CLK_MMC2_OUTPUT>,
<&ccu CLK_MMC2_SAMPLE>;
clock-names = "ahb",
"mmc",
"output",
"sample";
};
&pio {
compatible = "allwinner,sun8i-h3-pinctrl";
};