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Date: Mon, 9 Jul 2018 12:20:53 +0200
From: Matthias Brugger <matthias.bgg@...il.com>
To: Mars Cheng <mars.cheng@...iatek.com>,
Rob Herring <robh+dt@...nel.org>,
Marc Zyngier <marc.zyngier@....com>
Cc: CC Hwang <cc.hwang@...iatek.com>,
Loda Chou <loda.chou@...iatek.com>,
linux-kernel@...r.kernel.org, linux-mediatek@...ts.infradead.org,
devicetree@...r.kernel.org, wsd_upstream@...iatek.com,
linux-serial@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v4 1/1] arm64: dts: mediatek: add mt6765 support
On 09/07/18 08:05, Mars Cheng wrote:
> This adds basic chip support for MT6765 SoC.
>
> Signed-off-by: Mars Cheng <mars.cheng@...iatek.com>
> ---
> arch/arm64/boot/dts/mediatek/Makefile | 1 +
> arch/arm64/boot/dts/mediatek/mt6765-evb.dts | 33 ++++++
> arch/arm64/boot/dts/mediatek/mt6765.dtsi | 156 +++++++++++++++++++++++++++
> 3 files changed, 190 insertions(+)
> create mode 100644 arch/arm64/boot/dts/mediatek/mt6765-evb.dts
> create mode 100644 arch/arm64/boot/dts/mediatek/mt6765.dtsi
>
> diff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile
> index ac17f60..7506b0d 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-$(CONFIG_ARCH_MEDIATEK) += mt6765-evb.dtb
> dtb-$(CONFIG_ARCH_MEDIATEK) += mt6795-evb.dtb
> dtb-$(CONFIG_ARCH_MEDIATEK) += mt6797-evb.dtb
> dtb-$(CONFIG_ARCH_MEDIATEK) += mt7622-rfb1.dtb
As you can see, we have a long list of SoCs which are poorly supported.
I'm not very keen to just add another SoC which supports booting into a ramdisk
using the serial console. Do you have a roadmap adding mainline support for this
SoC?
Regards,
Matthias
> diff --git a/arch/arm64/boot/dts/mediatek/mt6765-evb.dts b/arch/arm64/boot/dts/mediatek/mt6765-evb.dts
> new file mode 100644
> index 0000000..36dddff2
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt6765-evb.dts
> @@ -0,0 +1,33 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * dts file for Mediatek MT6765
> + *
> + * (C) Copyright 2018. Mediatek, Inc.
> + *
> + * Mars Cheng <mars.cheng@...iatek.com>
> + */
> +
> +/dts-v1/;
> +#include "mt6765.dtsi"
> +
> +/ {
> + model = "MediaTek MT6765 EVB";
> + compatible = "mediatek,mt6765-evb", "mediatek,mt6765";
> +
> + aliases {
> + serial0 = &uart0;
> + };
> +
> + memory@...00000 {
> + device_type = "memory";
> + reg = <0 0x40000000 0 0x1e800000>;
> + };
> +
> + chosen {
> + stdout-path = "serial0:921600n8";
> + };
> +};
> +
> +&uart0 {
> + status = "okay";
> +};
> diff --git a/arch/arm64/boot/dts/mediatek/mt6765.dtsi b/arch/arm64/boot/dts/mediatek/mt6765.dtsi
> new file mode 100644
> index 0000000..cc365b1
> --- /dev/null
> +++ b/arch/arm64/boot/dts/mediatek/mt6765.dtsi
> @@ -0,0 +1,156 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * dts file for Mediatek MT6765
> + *
> + * (C) Copyright 2018. Mediatek, Inc.
> + *
> + * Mars Cheng <mars.cheng@...iatek.com>
> + */
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {
> + compatible = "mediatek,mt6765";
> + interrupt-parent = <&sysirq>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + psci {
> + compatible = "arm,psci-0.2";
> + method = "smc";
> + };
> +
> + cpus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + cpu@0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + enable-method = "psci";
> + reg = <0x000>;
> + };
> +
> + cpu@1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + enable-method = "psci";
> + reg = <0x001>;
> + };
> +
> + cpu@2 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + enable-method = "psci";
> + reg = <0x002>;
> + };
> +
> + cpu@3 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + enable-method = "psci";
> + reg = <0x003>;
> + };
> +
> + cpu@100 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + enable-method = "psci";
> + reg = <0x100>;
> + };
> +
> + cpu@101 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + enable-method = "psci";
> + reg = <0x101>;
> + };
> +
> + cpu@102 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + enable-method = "psci";
> + reg = <0x102>;
> + };
> +
> + cpu@103 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + enable-method = "psci";
> + reg = <0x103>;
> + };
> + };
> +
> + baud_clk: dummy26m {
> + compatible = "fixed-clock";
> + clock-frequency = <26000000>;
> + #clock-cells = <0>;
> + };
> +
> + sys_clk: dummyclk {
> + 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@...0000 {
> + compatible = "arm,gic-v3";
> + #interrupt-cells = <3>;
> + #address-cells = <2>;
> + #size-cells = <2>;
> + interrupt-parent = <&gic>;
> + interrupt-controller;
> + reg = <0 0x0c000000 0 0x40000>, /* GICD */
> + <0 0x0c100000 0 0x200000>, /* GICR */
> + <0 0x0c400000 0 0x2000>, /* GICC */
> + <0 0x0c410000 0 0x2000>, /* GICH */
> + <0 0x0c420000 0 0x20000>; /* GICV */
> + interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
> + };
> +
> + sysirq: interrupt-controller@...00a80 {
> + compatible = "mediatek,mt6765-sysirq",
> + "mediatek,mt6577-sysirq";
> + interrupt-controller;
> + #interrupt-cells = <3>;
> + interrupt-parent = <&gic>;
> + reg = <0 0x10200a80 0 0x50>;
> + };
> +
> + uart0: serial@...02000 {
> + compatible = "mediatek,mt6765-uart",
> + "mediatek,mt6577-uart";
> + reg = <0 0x11002000 0 0x400>;
> + interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_LOW>;
> + clocks = <&baud_clk>, <&sys_clk>;
> + clock-names = "baud", "bus";
> + status = "disabled";
> + };
> +
> + uart1: serial@...03000 {
> + compatible = "mediatek,mt6765-uart",
> + "mediatek,mt6577-uart";
> + reg = <0 0x11003000 0 0x400>;
> + interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_LOW>;
> + clocks = <&baud_clk>, <&sys_clk>;
> + clock-names = "baud", "bus";
> + status = "disabled";
> + };
> + }; /* end of soc */
> +};
>
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