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Date: Mon, 31 Jul 2023 11:06:00 +0800
From: Keguang Zhang <keguang.zhang@...il.com>
To: Du Huanpeng <u74147@...il.com>
Cc: linux-mips@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>
Subject: Re: [PATCH 03/17] MIPS: dts: Add basic DT support for Loongson-1 boards
On Mon, Jul 31, 2023 at 1:11 AM Du Huanpeng <u74147@...il.com> wrote:
>
> Keguang Zhang <keguang.zhang@...il.com> 于2023年7月29日周六 21:45写道：
> >
> > Add initial devicetree for Loongson-1 boards, including
> > LSGZ_1B_DEV and SMARTLOONG_1C board.
> > These basic DTs contain CPU, clock and core INTC.
> >
> > Signed-off-by: Keguang Zhang <keguang.zhang@...il.com>
> > ---
> > arch/mips/boot/dts/Makefile | 1 +
> > arch/mips/boot/dts/loongson/Makefile | 3 +
> > arch/mips/boot/dts/loongson/loongson1.dtsi | 22 ++++++
> > arch/mips/boot/dts/loongson/loongson1b.dtsi | 75 +++++++++++++++++++
> > arch/mips/boot/dts/loongson/loongson1c.dtsi | 29 +++++++
> > arch/mips/boot/dts/loongson/lsgz_1b_dev.dts | 25 +++++++
> > arch/mips/boot/dts/loongson/smartloong_1c.dts | 25 +++++++
> > 7 files changed, 180 insertions(+)
> > create mode 100644 arch/mips/boot/dts/loongson/loongson1.dtsi
> > create mode 100644 arch/mips/boot/dts/loongson/loongson1b.dtsi
> > create mode 100644 arch/mips/boot/dts/loongson/loongson1c.dtsi
> > create mode 100644 arch/mips/boot/dts/loongson/lsgz_1b_dev.dts
> > create mode 100644 arch/mips/boot/dts/loongson/smartloong_1c.dts
> >
> > diff --git a/arch/mips/boot/dts/Makefile b/arch/mips/boot/dts/Makefile
> > index 928f38a79dff..2e040b1ba97b 100644
> > --- a/arch/mips/boot/dts/Makefile
> > +++ b/arch/mips/boot/dts/Makefile
> > @@ -6,6 +6,7 @@ subdir-$(CONFIG_FIT_IMAGE_FDT_BOSTON) += img
> > subdir-$(CONFIG_MACH_INGENIC) += ingenic
> > subdir-$(CONFIG_LANTIQ) += lantiq
> > subdir-$(CONFIG_MACH_LOONGSON64) += loongson
> > +subdir-$(CONFIG_MACH_LOONGSON32) += loongson
> > subdir-$(CONFIG_SOC_VCOREIII) += mscc
> > subdir-$(CONFIG_MIPS_MALTA) += mti
> > subdir-$(CONFIG_LEGACY_BOARD_SEAD3) += mti
> > diff --git a/arch/mips/boot/dts/loongson/Makefile b/arch/mips/boot/dts/loongson/Makefile
> > index 5c6433e441ee..9d95f1351d5f 100644
> > --- a/arch/mips/boot/dts/loongson/Makefile
> > +++ b/arch/mips/boot/dts/loongson/Makefile
> > @@ -6,4 +6,7 @@ dtb-$(CONFIG_MACH_LOONGSON64) += loongson64c_8core_rs780e.dtb
> > dtb-$(CONFIG_MACH_LOONGSON64) += loongson64g_4core_ls7a.dtb
> > dtb-$(CONFIG_MACH_LOONGSON64) += loongson64v_4core_virtio.dtb
> >
> > +dtb-$(CONFIG_LOONGSON1B_LSGZ_DEV) += lsgz_1b_dev.dtb
> > +dtb-$(CONFIG_LOONGSON1C_SMARTLOONG) += smartloong_1c.dtb
> > +
> > obj-$(CONFIG_BUILTIN_DTB) += $(addsuffix .o, $(dtb-y))
> > diff --git a/arch/mips/boot/dts/loongson/loongson1.dtsi b/arch/mips/boot/dts/loongson/loongson1.dtsi
> > new file mode 100644
> > index 000000000000..a2b5c828bbbd
> > --- /dev/null
> > +++ b/arch/mips/boot/dts/loongson/loongson1.dtsi
> > @@ -0,0 +1,22 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2023 Keguang Zhang <keguang.zhang@...il.com>
> > + */
> > +
> > +/dts-v1/;
> > +
> > +#include <dt-bindings/clock/loongson,ls1x-clk.h>
> > +#include <dt-bindings/interrupt-controller/irq.h>
> > +
> > +/ {
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > +
> > + cpu_intc: interrupt-controller {
> > + compatible = "mti,cpu-interrupt-controller";
> > + #address-cells = <0>;
> > +
> > + interrupt-controller;
> > + #interrupt-cells = <1>;
> > + };
> > +};
> > diff --git a/arch/mips/boot/dts/loongson/loongson1b.dtsi b/arch/mips/boot/dts/loongson/loongson1b.dtsi
> > new file mode 100644
> > index 000000000000..784ae9b6572d
> > --- /dev/null
> > +++ b/arch/mips/boot/dts/loongson/loongson1b.dtsi
> > @@ -0,0 +1,75 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2023 Keguang Zhang <keguang.zhang@...il.com>
> > + */
> > +
> > +/dts-v1/;
> > +#include "loongson1.dtsi"
> > +
> > +/ {
> > + cpus {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + cpu@0 {
> > + device_type = "cpu";
> > + reg = <0>;
> > + #clock-cells = <1>;
> > + clocks = <&clkc LS1X_CLKID_CPU>;
> > + operating-points-v2 = <&cpu_opp_table>;
> > + };
> > + };
> > +
> > + cpu_opp_table: opp-table {
> > + compatible = "operating-points-v2";
> > + opp-shared;
> > +
> > + opp-44000000 {
> > + opp-hz = /bits/ 64 <44000000>;
> > + };
> > + opp-47142000 {
> > + opp-hz = /bits/ 64 <47142000>;
> > + };
> > + opp-50769000 {
> > + opp-hz = /bits/ 64 <50769000>;
> > + };
> > + opp-55000000 {
> > + opp-hz = /bits/ 64 <55000000>;
> > + };
> > + opp-60000000 {
> > + opp-hz = /bits/ 64 <60000000>;
> > + };
> > + opp-66000000 {
> > + opp-hz = /bits/ 64 <66000000>;
> > + };
> > + opp-73333000 {
> > + opp-hz = /bits/ 64 <73333000>;
> > + };
> > + opp-82500000 {
> > + opp-hz = /bits/ 64 <82500000>;
> > + };
> > + opp-94285000 {
> > + opp-hz = /bits/ 64 <94285000>;
> > + };
> > + opp-110000000 {
> > + opp-hz = /bits/ 64 <110000000>;
> > + };
> > + opp-132000000 {
> > + opp-hz = /bits/ 64 <132000000>;
> > + };
> > + opp-165000000 {
> > + opp-hz = /bits/ 64 <165000000>;
> > + };
> > + opp-220000000 {
> > + opp-hz = /bits/ 64 <220000000>;
> > + };
> > + };
> > +
> > + clkc: clock-controller@...78030 {
> > + compatible = "loongson,ls1b-clk";
> > + reg = <0x1fe78030 0x8>;
> > +
> > + clocks = <&xtal>;
> > + #clock-cells = <1>;
> > + };
> > +};
> > diff --git a/arch/mips/boot/dts/loongson/loongson1c.dtsi b/arch/mips/boot/dts/loongson/loongson1c.dtsi
> > new file mode 100644
> > index 000000000000..d552e1668984
> > --- /dev/null
> > +++ b/arch/mips/boot/dts/loongson/loongson1c.dtsi
> > @@ -0,0 +1,29 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2023 Keguang Zhang <keguang.zhang@...il.com>
> > + */
> > +
> > +/dts-v1/;
> > +#include "loongson1.dtsi"
> > +
> > +/ {
> > + cpus {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + cpu@0 {
> > + device_type = "cpu";
> > + reg = <0>;
> > + #clock-cells = <1>;
> > + clocks = <&clkc LS1X_CLKID_CPU>;
> > + };
> > + };
> > +
> > + clkc: clock-controller@...78030 {
> > + compatible = "loongson,ls1c-clk";
> > + reg = <0x1fe78030 0x8>;
> > +
> > + clocks = <&xtal>;
> > + #clock-cells = <1>;
> > + };
> > +};
> > diff --git a/arch/mips/boot/dts/loongson/lsgz_1b_dev.dts b/arch/mips/boot/dts/loongson/lsgz_1b_dev.dts
> > new file mode 100644
> > index 000000000000..d12c723b0a2b
> > --- /dev/null
> > +++ b/arch/mips/boot/dts/loongson/lsgz_1b_dev.dts
> > @@ -0,0 +1,25 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2023 Keguang Zhang <keguang.zhang@...il.com>
> > + */
> > +
> > +/dts-v1/;
> > +
> > +#include "loongson1b.dtsi"
> > +
> > +/ {
> > + compatible = "loongson,lsgz-1b-dev", "loongson,ls1b";
> > + model = "LSGZ_1B_DEV Board";
> > +
> > + memory@0 {
> > + device_type = "memory";
> > + reg = <0x0 0x4000000>;
> > + };
> > +
> > + xtal: xtal {
> for your information, hope it helps:
> in <devicetree-specification-v0.4.pdf> Page: 8
> The name of a node should be somewhat generic, reflecting the function
> of the device and not its precise programming model. If appropriate,
> the name should be one of the following choices:
> ... clock ...
>
Will fix this.
Thanks!
> > + compatible = "fixed-clock";
> > + clock-frequency = <33000000>;
> > + clock-output-names = "xtal";
> > + #clock-cells = <0>;
> > + };
> > +};
> > diff --git a/arch/mips/boot/dts/loongson/smartloong_1c.dts b/arch/mips/boot/dts/loongson/smartloong_1c.dts
> > new file mode 100644
> > index 000000000000..64e869acfd86
> > --- /dev/null
> > +++ b/arch/mips/boot/dts/loongson/smartloong_1c.dts
> > @@ -0,0 +1,25 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2023 Keguang Zhang <keguang.zhang@...il.com>
> > + */
> > +
> > +/dts-v1/;
> > +
> > +#include "loongson1c.dtsi"
> > +
> > +/ {
> > + compatible = "loongmasses,smartloong-1c", "loongson,ls1c";
> > + model = "Smartloong_1C Board";
> > +
> > + memory@0 {
> > + device_type = "memory";
> > + reg = <0x0 0x2000000>;
> > + };
> > +
> > + xtal: xtal {
> > + compatible = "fixed-clock";
> > + clock-frequency = <24000000>;
> > + clock-output-names = "xtal";
> > + #clock-cells = <0>;
> > + };
> > +};
> > --
> > 2.39.2
> >
>
> ---
> Du Huanpeng
--
Best regards,
Keguang Zhang
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