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Date:   Tue, 31 Jul 2018 07:21:22 +0100
Message-ID: <86bmaox6vx.wl-marc.zyngier@arm.com>
From:   Marc Zyngier <marc.zyngier@arm.com>
To:     Erin Lo <erin.lo@mediatek.com>
Cc:     Matthias Brugger <matthias.bgg@gmail.com>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Jason Cooper <jason@lakedaemon.net>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Stephen Boyd <sboyd@codeaurora.org>,
        <devicetree@vger.kernel.org>,
        srv_heupstream <srv_heupstream@mediatek.com>,
        <linux-kernel@vger.kernel.org>, <linux-serial@vger.kernel.org>,
        <linux-mediatek@lists.infradead.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <yingjoe.chen@mediatek.com>, <mars.cheng@mediatek.com>,
        <eddie.huang@mediatek.com>, <linux-clk@vger.kernel.org>,
        Ben Ho <Ben.Ho@mediatek.com>
Subject: Re: [PATCH v4 03/10] arm64: dts: Add Mediatek SoC MT8183 and evaluation board dts and Makefile
In-Reply-To: <1533015487-60189-4-git-send-email-erin.lo@mediatek.com>
References: <1533015487-60189-1-git-send-email-erin.lo@mediatek.com>
        <1533015487-60189-4-git-send-email-erin.lo@mediatek.com>
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On Tue, 31 Jul 2018 06:38:00 +0100,
Erin Lo <erin.lo@mediatek.com> wrote:
> 
> From: Ben Ho <Ben.Ho@mediatek.com>
> 
> Add basic chip support for Mediatek 8183
> 
> Signed-off-by: Ben Ho <Ben.Ho@mediatek.com>
> Signed-off-by: Erin Lo <erin.lo@mediatek.com>
> ---
>  arch/arm64/boot/dts/mediatek/Makefile       |   1 +
>  arch/arm64/boot/dts/mediatek/mt8183-evb.dts |  23 +++++
>  arch/arm64/boot/dts/mediatek/mt8183.dtsi    | 146 ++++++++++++++++++++++++++++
>  3 files changed, 170 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/mediatek/mt8183-evb.dts
>  create mode 100644 arch/arm64/boot/dts/mediatek/mt8183.dtsi
> 
> diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile
> index 7506b0d..a91d462 100644
> --- a/arch/arm64/boot/dts/mediatek/Makefile
> +++ b/arch/arm64/boot/dts/mediatek/Makefile
> @@ -6,3 +6,4 @@ dtb-$(CONFIG_ARCH_MEDIATEK) += mt6795-evb.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt6797-evb.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt7622-rfb1.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt8173-evb.dtb
> +dtb-$(CONFIG_ARCH_MEDIATEK) += mt8183-evb.dtb
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183-evb.dts b/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
> new file mode 100644
> index 0000000..2a3dd5a
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt8183-evb.dts
> @@ -0,0 +1,23 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +/*
> + * Copyright (c) 2018 MediaTek Inc.
> + * Author: Ben Ho <ben.ho@mediatek.com>
> + *	   Erin Lo <erin.lo@mediatek.com>
> + */
> +
> +/dts-v1/;
> +#include "mt8183.dtsi"
> +
> +/ {
> +	model = "MediaTek MT8183 evaluation board";
> +	compatible = "mediatek,mt8183-evb", "mediatek,mt8183";
> +
> +	memory@40000000 {
> +		device_type = "memory";
> +		reg = <0 0x40000000 0 0x80000000>;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:921600n8";
> +	};
> +};
> diff --git a/arch/arm64/boot/dts/mediatek/mt8183.dtsi b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> new file mode 100644
> index 0000000..1553265
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt8183.dtsi
> @@ -0,0 +1,146 @@
> +// SPDX-License-Identifier: (GPL-2.0 OR MIT)
> +/*
> + * Copyright (c) 2018 MediaTek Inc.
> + * Author: Ben Ho <ben.ho@mediatek.com>
> + *	   Erin Lo <erin.lo@mediatek.com>
> + */
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {
> +	compatible = "mediatek,mt8183";
> +	interrupt-parent = <&sysirq>;
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu-map {
> +			cluster0 {
> +				core0 {
> +					cpu = <&cpu0>;
> +				};
> +				core1 {
> +					cpu = <&cpu1>;
> +				};
> +				core2 {
> +					cpu = <&cpu2>;
> +				};
> +				core3 {
> +					cpu = <&cpu3>;
> +				};
> +			};
> +
> +			cluster1 {
> +				core0 {
> +					cpu = <&cpu4>;
> +				};
> +				core1 {
> +					cpu = <&cpu5>;
> +				};
> +				core2 {
> +					cpu = <&cpu6>;
> +				};
> +				core3 {
> +					cpu = <&cpu7>;
> +				};
> +			};
> +		};
> +
> +		cpu0: cpu@000 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			reg = <0x000>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu1: cpu@001 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			reg = <0x001>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu2: cpu@002 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			reg = <0x002>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu3: cpu@003 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a53";
> +			reg = <0x003>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu4: cpu@100 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a73";
> +			reg = <0x100>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu5: cpu@101 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a73";
> +			reg = <0x101>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu6: cpu@102 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a73";
> +			reg = <0x102>;
> +			enable-method = "psci";
> +		};
> +
> +		cpu7: cpu@103 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a73";
> +			reg = <0x103>;
> +			enable-method = "psci";
> +		};
> +	};
> +
> +	psci {
> +		compatible      = "arm,psci-1.0";
> +		method          = "smc";
> +	};
> +
> +	timer {
> +		compatible = "arm,armv8-timer";
> +		interrupt-parent = <&gic>;
> +		interrupts = <GIC_PPI 13 IRQ_TYPE_LEVEL_LOW>,
> +			     <GIC_PPI 14 IRQ_TYPE_LEVEL_LOW>,
> +			     <GIC_PPI 11 IRQ_TYPE_LEVEL_LOW>,
> +			     <GIC_PPI 10 IRQ_TYPE_LEVEL_LOW>;
> +	};
> +
> +	gic: interrupt-controller@0c000000 {
> +		compatible = "arm,gic-v3";
> +		#interrupt-cells = <3>;
> +		interrupt-parent = <&gic>;
> +		interrupt-controller;
> +		reg = <0 0x0c000000 0 0x40000>,  /* GICD */
> +		      <0 0x0c100000 0 0x200000>, /* GICR */
> +		      <0 0x0c400000 0 0x2000>,   /* GICC */
> +		      <0 0x0c410000 0 0x1000>,   /* GICH */
> +		      <0 0x0c420000 0 0x2000>;   /* GICV */
> +
> +		interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
> +	};
> +
> +	sysirq: intpol-controller@0c530a80 {
> +		compatible = "mediatek,mt8183-sysirq",
> +			     "mediatek,mt6577-sysirq";
> +		interrupt-controller;
> +		#interrupt-cells = <3>;
> +		interrupt-parent = <&gic>;
> +		reg = <0 0x0c530a80 0 0x50>;
> +	};
> +};

Not directly related to that patch, but still worth asking, if this HW
is going to get some mainline support:

I do not see any mention on the PMU yet. It'd be good to see it added
early, specially if we need to express CPU affinity (as this change
the size of the GICv3 interrupt specifier, see the rk3399 support for
an example).

Thanks,

	M.

-- 
Jazz is not dead, it just smell funny.