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Message-ID: <7e8e2097-d5ca-a594-cb87-1b7b221fd58a@rock-chips.com>
Date: Mon, 19 Jun 2017 18:34:27 +0800
From: Frank Wang <frank.wang@...k-chips.com>
To: Heiko Stuebner <heiko@...ech.de>
Cc: robh+dt@...nel.org, ulf.hansson@...aro.org, mark.rutland@....com,
linux-arm-kernel@...ts.infradead.org,
linux-rockchip@...ts.infradead.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
charles.chen@...k-chips.com, kevan.lan@...k-chips.com,
huangtao@...k-chips.com, wmc@...k-chips.com
Subject: Re: [PATCH 1/6] ARM: dts: rockchip: add basic dtsi file for RK3229
SoC
Hi Heiko,
On 2017/6/18 2:12, Heiko Stuebner wrote:
> Am Donnerstag, 15. Juni 2017, 15:16:15 CEST schrieb Frank Wang:
>> Due to some tiny differences between RK3228 and RK3229, this patch
>> adds a basic dtsi file which includes a new CPU opp table and PSCI
>> brought up support for RK3229.
>>
>> Signed-off-by: Frank Wang <frank.wang@...k-chips.com>
>> ---
>> arch/arm/boot/dts/rk3229-evb.dts | 2 +-
>> arch/arm/boot/dts/rk3229.dtsi | 110 +++++++++++++++++++++++++++++++++++++++
>> 2 files changed, 111 insertions(+), 1 deletion(-)
>> create mode 100644 arch/arm/boot/dts/rk3229.dtsi
>>
>> diff --git a/arch/arm/boot/dts/rk3229-evb.dts b/arch/arm/boot/dts/rk3229-evb.dts
>> index 1b55192..82e8a53 100644
>> --- a/arch/arm/boot/dts/rk3229-evb.dts
>> +++ b/arch/arm/boot/dts/rk3229-evb.dts
>> @@ -40,7 +40,7 @@
>>
>> /dts-v1/;
>>
>> -#include "rk322x.dtsi"
>> +#include "rk3229.dtsi"
>>
>> / {
>> model = "Rockchip RK3229 Evaluation board";
>> diff --git a/arch/arm/boot/dts/rk3229.dtsi b/arch/arm/boot/dts/rk3229.dtsi
>> new file mode 100644
>> index 0000000..d43d133
>> --- /dev/null
>> +++ b/arch/arm/boot/dts/rk3229.dtsi
>> @@ -0,0 +1,110 @@
>> +/*
>> + * Copyright (c) 2017 Fuzhou Rockchip Electronics Co., Ltd
>> + *
>> + * 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 library 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 library 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 "rk322x.dtsi"
>> +
>> +/ {
>> + compatible = "rockchip,rk3229";
>> +
>> + /delete-node/ opp-table0;
>> +
>> + cpu0_opp_table: opp_table0 {
>> + compatible = "operating-points-v2";
>> + opp-shared;
>> +
>> + opp-408000000 {
>> + opp-hz = /bits/ 64 <408000000>;
>> + opp-microvolt = <950000>;
>> + clock-latency-ns = <40000>;
>> + opp-suspend;
>> + };
>> + opp-600000000 {
>> + opp-hz = /bits/ 64 <600000000>;
>> + opp-microvolt = <975000>;
>> + };
>> + opp-816000000 {
>> + opp-hz = /bits/ 64 <816000000>;
>> + opp-microvolt = <1000000>;
>> + };
>> + opp-1008000000 {
>> + opp-hz = /bits/ 64 <1008000000>;
>> + opp-microvolt = <1175000>;
>> + };
>> + opp-1200000000 {
>> + opp-hz = /bits/ 64 <1200000000>;
>> + opp-microvolt = <1275000>;
>> + };
>> + opp-1296000000 {
>> + opp-hz = /bits/ 64 <1296000000>;
>> + opp-microvolt = <1325000>;
>> + };
>> + opp-1392000000 {
>> + opp-hz = /bits/ 64 <1392000000>;
>> + opp-microvolt = <1375000>;
>> + };
>> + opp-1464000000 {
>> + opp-hz = /bits/ 64 <1464000000>;
>> + opp-microvolt = <1400000>;
>> + };
>> + };
>> +
>> + psci {
>> + compatible = "arm,psci-1.0", "arm,psci-0.2";
>> + method = "smc";
>> + };
>> +};
>> +
>> +&cpu0 {
>> + enable-method = "psci";
>> +};
> Hmm, I don't really understand this.
> What method of core-bringup does the rk3228 use? In the current
> rk322x.dtsi there is no enable-method at all defined.
For non-security, the same with rk3036 SoC, we use rk3036-smp method to
bring-up cores, and for security, we use arm-psci method.
As security become more and more important and required, we would prefer
using arm-psci method, and it is also an easy way to use.
> So is the rk3228 firmware using a different method than the rk3229?
No, they are the same. How about I move these changes to rk322x.dtsi?
> And out of curiosity as this is a arm32 without atf, is the psci
> implementation (for uboot?) you're using available somewhere?
Ah, it is included in op-tee :-)
BR.
Frank
>
> Thanks
> Heiko
>
>> +
>> +&cpu1 {
>> + enable-method = "psci";
>> +};
>> +
>> +&cpu2 {
>> + enable-method = "psci";
>> +};
>> +
>> +&cpu3 {
>> + enable-method = "psci";
>> +};
>>
>
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