Date:	Wed, 17 Feb 2016 11:46:46 +0000
From:	Mark Rutland <mark.rutland@....com>
To:	"jianqun.xu" <jay.xu@...k-chips.com>
Cc:	heiko@...ech.de, robh+dt@...nel.org, pawel.moll@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	jwerner@...omium.org, broonie@...nel.org, catalin.marinas@....com,
	will.deacon@....com, sboyd@...eaurora.org,
	linus.walleij@...aro.org, sjoerd.simons@...labora.co.uk,
	huangtao@...k-chips.com, linux-rockchip@...ts.infradead.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH 6/6] ARM64: dts: rockchip: add core dtsi file for rk3399

On Wed, Feb 17, 2016 at 10:01:16AM +0800, jianqun.xu wrote:
> From: Xu Jianqun <jay.xu@...k-chips.com>
> 
> Add dtsi file for Rockchip rk3399 SoCs, which includes some
> general nodes such as cpu, pmu, cru, gic, amba and so on.
> 
> Change-Id: Ie3b824e8ead967d4cb119d73222b7a198478c29c

This is meaningless upstream. Please remove any "Change-Id" lines from
upstream commit messages.

> Signed-off-by: Xu Jianqun <jay.xu@...k-chips.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3399.dtsi | 989 +++++++++++++++++++++++++++++++
>  1 file changed, 989 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/rockchip/rk3399.dtsi
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399.dtsi b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> new file mode 100644
> index 0000000..eb671f6
> --- /dev/null
> +++ b/arch/arm64/boot/dts/rockchip/rk3399.dtsi
> @@ -0,0 +1,989 @@
> +/*
> + * Copyright (c) 2016 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 <dt-bindings/clock/rk3399-cru.h>
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/pinctrl/rockchip.h>
> +
> +/ {
> +	compatible = "rockchip,rk3399";
> +	interrupt-parent = <&gic>;
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +
> +	aliases {
> +		serial0 = &uart0;
> +		serial1 = &uart1;
> +		serial2 = &uart2;
> +		serial3 = &uart3;
> +	};
> +
> +	psci {
> +		compatible = "arm,psci";
> +		method = "smc";
> +	};

That compatible string alone is insufficient, as it implies no
particular function IDs. Hotplug and idle cannot possibly work.

Have you tested this DT?

Which PSCI version have you implemented? Are you using a standard
firmware (e.g. ARM Trusted Firmware), or some custom implementation?

> +		cpu_l0: cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53", "arm,armv8";
> +			reg = <0x0 0x0>;
> +			cpu-idle-states = <&cpu_sleep>;
> +			enable-method = "psci";
> +		};

> +		cpu_b0: cpu@100 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a72", "arm,armv8";
> +			reg = <0x0 0x100>;
> +			cpu-idle-states = <&cpu_sleep>;
> +			enable-method = "psci";
> +		};
> +

> +	pmu {
> +		compatible = "arm,armv8-pmuv3";
> +		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_LOW>;
> +		interrupt-affinity = <&cpu_l0>, <&cpu_l1>, <&cpu_l2>,
> +				     <&cpu_l3>, <&cpu_b0>, <&cpu_b1>;
> +	};
> +

This isn't quite right. We should have separate nodes for the A72 and
A53 PMUs.

We can't describe that just yet due to needing cluster-local PPIs. I
believe Will was looking into that.

In the mean time, please drop the PMU node.

> +	timer {
> +		compatible = "arm,armv8-timer";
> +		interrupts =
> +			<GIC_PPI 13
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> +			<GIC_PPI 14
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> +			<GIC_PPI 11
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>,
> +			<GIC_PPI 10
> +			(GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
> +		clock-frequency = <24000000>;
> +	};

Please fix your firmware to program CNTFRQ. Using clock-frequency is
really not sufficient, and new platforms have no excuse for not having
it programmed correctly.

Thanks,
Mark.

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