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Subject: Re: [PATCH v2 11/11] arm64: dts: add dts nodes for MT6779
To:     Mars Cheng <mars.cheng@mediatek.com>,
        Rob Herring <robh@kernel.org>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Stephen Boyd <sboyd@kernel.org>,
        Sean Wang <sean.wang@kernel.org>,
        Linus Walleij <linus.walleij@linaro.org>
Cc:     CC Hwang <cc.hwang@mediatek.com>,
        Loda Chou <loda.chou@mediatek.com>,
        linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org,
        devicetree@vger.kernel.org, wsd_upstream@mediatek.com,
        mtk01761 <wendell.lin@mediatek.com>, linux-clk@vger.kernel.org
References: <1566206502-4347-1-git-send-email-mars.cheng@mediatek.com>
 <1566206502-4347-12-git-send-email-mars.cheng@mediatek.com>
From:   Matthias Brugger <matthias.bgg@gmail.com>
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Date:   Fri, 23 Aug 2019 18:13:58 +0200
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On 19/08/2019 11:21, Mars Cheng wrote:
> this adds initial MT6779 dts settings fo board support,

...for basic board support, including clocks pinctrl and uart.

By the way, while talking about basic support. Do you have any detailed plans to
upstream this SoC? We already have mt6755 and mt6795 which didn't get much
further then the most basic support. More or less the same holds for mt6797.

While I'm thrilled to see efforts done by MediaTek to get the chips upstream,
I'm not really happy to add a new SoC every now and then without seeing much
progress on the overall enablement of new peripherals. I know on mt6797 we would
need pmic-regulator to be able to upstream the MMC driver. Without that the
available board [1] is of little use. I wonder if all this other SoCs have a
really different PMIC and MMC. I'm not saying that I want you to upstream these
for mt6797. What I wanted to express is my hope that by upstreaming more and
more peripherals of the mt67xx line, we will little by little get to a nice
support in mainline kernel.
That's what motivated my question about your plans for upstreaming the SoC.

Regards,
Matthias

> including cpu, gic, timer, ccf, pinctrl, uart...etc.
> 
> Signed-off-by: Mars Cheng <mars.cheng@mediatek.com>
> ---
>  arch/arm64/boot/dts/mediatek/Makefile        |    1 +
>  arch/arm64/boot/dts/mediatek/mt6779-evb.dtsi |   31 ++++
>  arch/arm64/boot/dts/mediatek/mt6779.dts      |  229 ++++++++++++++++++++++++++
>  3 files changed, 261 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/mediatek/mt6779-evb.dtsi
>  create mode 100644 arch/arm64/boot/dts/mediatek/mt6779.dts
> 
> diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile
> index 458bbc4..53f1c61 100644
> --- a/arch/arm64/boot/dts/mediatek/Makefile
> +++ b/arch/arm64/boot/dts/mediatek/Makefile
> @@ -1,6 +1,7 @@
>  # SPDX-License-Identifier: GPL-2.0
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt2712-evb.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt6755-evb.dtb
> +dtb-$(CONFIG_ARCH_MEDIATEK) += mt6779-evb.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt6795-evb.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt6797-evb.dtb
>  dtb-$(CONFIG_ARCH_MEDIATEK) += mt6797-x20-dev.dtb
> diff --git a/arch/arm64/boot/dts/mediatek/mt6779-evb.dtsi b/arch/arm64/boot/dts/mediatek/mt6779-evb.dtsi
> new file mode 100644
> index 0000000..164f5cb
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt6779-evb.dtsi
> @@ -0,0 +1,31 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (c) 2019 MediaTek Inc.
> + * Author: Mars.C <mars.cheng@mediatek.com>
> + *
> + */
> +
> +/dts-v1/;
> +#include "mt6779.dtsi"
> +
> +/ {
> +	model = "MediaTek MT6779 EVB";
> +	compatible = "mediatek,mt6779-evb", "mediatek,mt6779";
> +
> +	aliases {
> +		serial0 = &uart0;
> +	};
> +
> +	memory@40000000 {
> +		device_type = "memory";
> +		reg = <0 0x40000000 0 0x1e800000>;
> +	};
> +
> +	chosen {
> +		stdout-path = "serial0:921600n8";
> +	};
> +};
> +
> +&uart0 {
> +	status = "okay";
> +};
> diff --git a/arch/arm64/boot/dts/mediatek/mt6779.dts b/arch/arm64/boot/dts/mediatek/mt6779.dts
> new file mode 100644
> index 0000000..daa25b7
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt6779.dts
> @@ -0,0 +1,229 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +/*
> + * Copyright (c) 2019 MediaTek Inc.
> + * Author: Mars.C <mars.cheng@mediatek.com>
> + *
> + */
> +
> +#include <dt-bindings/clock/mt6779-clk.h>
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {
> +	compatible = "mediatek,mt6779";
> +	interrupt-parent = <&sysirq>;
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +
> +	psci {
> +		compatible = "arm,psci-0.2";
> +		method = "smc";
> +	};
> +
> +	cpus {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu0: cpu@0 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a55";
> +			enable-method = "psci";
> +			reg = <0x000>;
> +		};
> +
> +		cpu1: cpu@1 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a55";
> +			enable-method = "psci";
> +			reg = <0x100>;
> +		};
> +
> +		cpu2: cpu@2 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a55";
> +			enable-method = "psci";
> +			reg = <0x200>;
> +		};
> +
> +		cpu3: cpu@3 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a55";
> +			enable-method = "psci";
> +			reg = <0x300>;
> +		};
> +
> +		cpu4: cpu@4 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a55";
> +			enable-method = "psci";
> +			reg = <0x400>;
> +		};
> +
> +		cpu5: cpu@5 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a55";
> +			enable-method = "psci";
> +			reg = <0x500>;
> +		};
> +
> +		cpu6: cpu@6 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a75";
> +			enable-method = "psci";
> +			reg = <0x600>;
> +		};
> +
> +		cpu7: cpu@7 {
> +			device_type = "cpu";
> +			compatible = "arm,cortex-a75";
> +			enable-method = "psci";
> +			reg = <0x700>;
> +		};
> +	};
> +
> +	clk26m: oscillator@0 {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <26000000>;
> +		clock-output-names = "clk26m";
> +	};
> +
> +	clk32k: oscillator@1 {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		clock-frequency = <32768>;
> +		clock-output-names = "clk32k";
> +	};
> +
> +	uart_clk: dummy26m {
> +		compatible = "fixed-clock";
> +		clock-frequency = <26000000>;
> +		#clock-cells = <0>;
> +	};
> +
> +	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>;
> +	};
> +
> +	soc {
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		compatible = "simple-bus";
> +		ranges;
> +
> +		gic: interrupt-controller@0c000000 {
> +			compatible = "arm,gic-v3";
> +			#interrupt-cells = <3>;
> +			#address-cells = <2>;
> +			#size-cells = <2>;
> +			#redistributor-regions = <1>;
> +			interrupt-parent = <&gic>;
> +			interrupt-controller;
> +			reg = <0 0x0c000000 0 0x40000>,  /* GICD */
> +			      <0 0x0c040000 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@0c53a650 {
> +			compatible = "mediatek,mt6779-sysirq",
> +				     "mediatek,mt6577-sysirq";
> +			interrupt-controller;
> +			#interrupt-cells = <3>;
> +			interrupt-parent = <&gic>;
> +			reg = <0 0x0c53a650 0 0x50>;
> +		};
> +
> +		topckgen: clock-controller@10000000 {
> +			compatible = "mediatek,mt6779-topckgen", "syscon";
> +			reg = <0 0x10000000 0 0x1000>;
> +			#clock-cells = <1>;
> +		};
> +
> +		infracfg_ao: clock-controller@10001000 {
> +			compatible = "mediatek,mt6779-infracfg_ao", "syscon";
> +			reg = <0 0x10001000 0 0x1000>;
> +			#clock-cells = <1>;
> +		};
> +
> +		apmixed: clock-controller@1000c000 {
> +			compatible = "mediatek,mt6779-apmixed", "syscon";
> +			reg = <0 0x1000c000 0 0xe00>;
> +			#clock-cells = <1>;
> +		};
> +
> +		uart0: serial@11002000 {
> +			compatible = "mediatek,mt6779-uart",
> +				     "mediatek,mt6577-uart";
> +			reg = <0 0x11002000 0 0x400>;
> +			interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
> +			clocks = <&uart_clk>;
> +			status = "disabled";
> +		};
> +
> +		uart1: serial@11003000 {
> +			compatible = "mediatek,mt6779-uart",
> +				     "mediatek,mt6577-uart";
> +			reg = <0 0x11003000 0 0x400>;
> +			interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_LOW>;
> +			clocks = <&uart_clk>;
> +			status = "disabled";
> +		};
> +
> +		audio: clock-controller@11210000 {
> +			compatible = "mediatek,mt6779-audio", "syscon";
> +			reg = <0 0x11210000 0 0x1000>;
> +			#clock-cells = <1>;
> +		};
> +
> +		mfgcfg: clock-controller@13fbf000 {
> +			compatible = "mediatek,mt6779-mfgcfg", "syscon";
> +			reg = <0 0x13fbf000 0 0x1000>;
> +			#clock-cells = <1>;
> +		};
> +
> +		mmsys: clock-controller@14000000 {
> +			compatible = "mediatek,mt6779-mmsys", "syscon";
> +			reg = <0 0x14000000 0 0x1000>;
> +			#clock-cells = <1>;
> +		};
> +
> +		imgsys: clock-controller@15020000 {
> +			compatible = "mediatek,mt6779-imgsys", "syscon";
> +			reg = <0 0x15020000 0 0x1000>;
> +			#clock-cells = <1>;
> +		};
> +
> +		vdecsys: clock-controller@16000000 {
> +			compatible = "mediatek,mt6779-vdecsys", "syscon";
> +			reg = <0 0x16000000 0 0x1000>;
> +			#clock-cells = <1>;
> +		};
> +
> +		vencsys: clock-controller@17000000 {
> +			compatible = "mediatek,mt6779-vencsys", "syscon";
> +			reg = <0 0x17000000 0 0x1000>;
> +			#clock-cells = <1>;
> +		};
> +
> +		camsys: clock-controller@1a000000 {
> +			compatible = "mediatek,mt6779-camsys", "syscon";
> +			reg = <0 0x1a000000 0 0x10000>;
> +			#clock-cells = <1>;
> +		};
> +
> +		ipesys: clock-controller@1b000000 {
> +			compatible = "mediatek,mt6779-ipesys", "syscon";
> +			reg = <0 0x1b000000 0 0x1000>;
> +			#clock-cells = <1>;
> +		};
> +
> +	};
> +};
>