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Message-ID: <1530664199.28949.4.camel@mtkswgap22>
Subject: Re: [PATCH v2 2/2] arm64: dts: mediatek: add mt6765 support
From:   Mars Cheng <mars.cheng@mediatek.com>
To:     Rob Herring <robh+dt@kernel.org>
CC:     Matthias Brugger <matthias.bgg@gmail.com>,
        Marc Zyngier <marc.zyngier@arm.com>,
        CC Hwang <cc.hwang@mediatek.com>,
        Loda Choui <loda.chou@mediatek.com>,
        Miles Chen <miles.chen@mediatek.com>,
        Jades Shih <jades.shih@mediatek.com>,
        Yingjoe Chen <yingjoe.chen@mediatek.com>,
        "My Chuang" <my.chuang@mediatek.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        <linux-mediatek@lists.infradead.org>, <devicetree@vger.kernel.org>,
        <wsd_upstream@mediatek.com>,
        "open list:SERIAL DRIVERS" <linux-serial@vger.kernel.org>,
        "moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE" 
        <linux-arm-kernel@lists.infradead.org>
Date:   Wed, 4 Jul 2018 08:29:59 +0800
In-Reply-To: <CAL_JsqKxvCxn3eb0sZVFwhUudDAkoHH5uyUgt1NY06zt-yKkQQ@mail.gmail.com>
References: <1529978646-28976-1-git-send-email-mars.cheng@mediatek.com>
         <1529978646-28976-3-git-send-email-mars.cheng@mediatek.com>
         <CAL_JsqKxvCxn3eb0sZVFwhUudDAkoHH5uyUgt1NY06zt-yKkQQ@mail.gmail.com>
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Hi Rob

On Mon, 2018-07-02 at 15:50 -0600, Rob Herring wrote:
> On Mon, Jun 25, 2018 at 8:04 PM Mars Cheng <mars.cheng@mediatek.com> wrote:
> >
> > This adds basic chip support for MT6765 SoC.
> >
> > Signed-off-by: Mars Cheng <mars.cheng@mediatek.com>
> > ---
> >  arch/arm64/boot/dts/mediatek/Makefile       |    1 +
> >  arch/arm64/boot/dts/mediatek/mt6765-evb.dts |   33 ++++++
> >  arch/arm64/boot/dts/mediatek/mt6765.dtsi    |  158 +++++++++++++++++++++++++++
> >  3 files changed, 192 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
> > 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@mediatek.com>
> > + */
> > +
> > +/dts-v1/;
> > +#include "mt6765.dtsi"
> > +
> > +/ {
> > +       model = "MediaTek MT6765 EVB";
> > +       compatible = "mediatek,mt6765-evb", "mediatek,mt6765";
> > +
> > +       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/mt6765.dtsi b/arch/arm64/boot/dts/mediatek/mt6765.dtsi
> > new file mode 100644
> > index 0000000..ab34c0f
> > --- /dev/null
> > +++ b/arch/arm64/boot/dts/mediatek/mt6765.dtsi
> > @@ -0,0 +1,158 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * dts file for Mediatek MT6765
> > + *
> > + * (C) Copyright 2018. Mediatek, Inc.
> > + *
> > + * Mars Cheng <mars.cheng@mediatek.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>;
> > +
> > +               cpu0: cpu@0 {
> 
> Really need labels for cpu nodes?
> 

Yes, I can drop them.

> > +                       device_type = "cpu";
> > +                       compatible = "arm,cortex-a53";
> > +                       enable-method = "psci";
> > +                       reg = <0x000>;
> > +               };
> > +
> > +               cpu1: cpu@1 {
> > +                       device_type = "cpu";
> > +                       compatible = "arm,cortex-a53";
> > +                       enable-method = "psci";
> > +                       reg = <0x001>;
> > +               };
> > +
> > +               cpu2: cpu@2 {
> > +                       device_type = "cpu";
> > +                       compatible = "arm,cortex-a53";
> > +                       enable-method = "psci";
> > +                       reg = <0x002>;
> > +               };
> > +
> > +               cpu3: cpu@3 {
> > +                       device_type = "cpu";
> > +                       compatible = "arm,cortex-a53";
> > +                       enable-method = "psci";
> > +                       reg = <0x003>;
> > +               };
> > +
> > +               cpu4: cpu@100 {
> > +                       device_type = "cpu";
> > +                       compatible = "arm,cortex-a53";
> > +                       enable-method = "psci";
> > +                       reg = <0x100>;
> > +               };
> > +
> > +               cpu5: cpu@101 {
> > +                       device_type = "cpu";
> > +                       compatible = "arm,cortex-a53";
> > +                       enable-method = "psci";
> > +                       reg = <0x101>;
> > +               };
> > +
> > +               cpu6: cpu@102 {
> > +                       device_type = "cpu";
> > +                       compatible = "arm,cortex-a53";
> > +                       enable-method = "psci";
> > +                       reg = <0x102>;
> > +               };
> > +
> > +               cpu7: 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
> > +                            (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>,
> > +                            <GIC_PPI 14
> > +                            (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>,
> > +                            <GIC_PPI 11
> > +                            (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>,
> > +                            <GIC_PPI 10
> > +                            (GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_LOW)>;
> > +       };
> > +
> > +       soc {
> > +               #address-cells = <2>;
> > +               #size-cells = <2>;
> > +               compatible = "simple-bus";
> > +               ranges;
> > +
> > +               sysirq: intpol-controller@10200a80 {
> 
> interrupt-controller@...


My mistake, did not fix this in v2, will correct it. 

> 
> > +                       compatible = "mediatek,mt6765-sysirq",
> > +                                    "mediatek,mt6577-sysirq";
> > +                       interrupt-controller;
> > +                       #interrupt-cells = <3>;
> > +                       interrupt-parent = <&gic>;
> > +                       reg = <0 0x10200a80 0 0x50>;
> > +               };
> > +
> > +               gic: interrupt-controller@0c000000 {
> 
> Drop the leading 0. Build your dts with W=12 and fix the warnings like this.

Thanks for suggestion. Will avoid this kind of errors.

> 
> > +                       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>, // distributor
> > +                             <0 0x0c100000 0 0x200000>; // redistributor
> > +                       interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_HIGH>;
> > +               };
> > +
> > +               uart0: serial@11002000 {
> > +                       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@11003000 {
> > +                       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 */
> > +};
> > --
> > 1.7.9.5
> >