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Message-ID: <CALSpo=ZuO9fugMmABUK-n5tyxNVwpWrQnf_nexbNKr0gZP8f9w@mail.gmail.com>
Date: Thu, 1 Aug 2024 11:57:09 -0400
From: Jesse Taube <jesse@...osinc.com>
To: Yixun Lan <dlan@...too.org>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Yangyu Chen <cyy@...self.name>, Daniel Lezcano <daniel.lezcano@...aro.org>, 
	Thomas Gleixner <tglx@...utronix.de>, Samuel Holland <samuel.holland@...ive.com>, 
	Anup Patel <anup@...infault.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, 
	Jiri Slaby <jirislaby@...nel.org>, Lubomir Rintel <lkundrak@...sk>, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org, 
	linux-serial@...r.kernel.org, Jisheng Zhang <jszhang@...nel.org>, 
	Inochi Amaoto <inochiama@...look.com>, Icenowy Zheng <uwu@...nowy.me>, 
	Meng Zhang <zhangmeng.kevin@...cemit.com>, Meng Zhang <kevin.z.m@...mail.com>
Subject: Re: [PATCH v5 08/10] riscv: dts: add initial SpacemiT K1 SoC device tree

On Mon, Jul 29, 2024 at 8:29 PM Yixun Lan <dlan@...too.org> wrote:
>
> From: Yangyu Chen <cyy@...self.name>
>
> Banana Pi BPI-F3 motherboard is powered by SpacemiT K1[1].
>
> Key features:
> - 4 cores per cluster, 2 clusters on chip
> - UART IP is Intel XScale UART
>
> Some key considerations:
> - ISA string is inferred from vendor documentation[2]
> - Cluster topology is inferred from datasheet[1] and L2 in vendor dts[3]
> - No coherent DMA on this board
>     Inferred by taking vendor ethernet and MMC drivers to the mainline
>     kernel. Without dma-noncoherent in soc node, the driver fails.
> - Add cache nodes
>     K1 SoC has 128 sets of 32KiB L1 I/D Cache for each hart, and 512 sets
>     of 512KiB L2 Cache for each cluster.
>
> Currently only support booting into console with only uart, other
> features will be added soon later.
>
> Link: https://docs.banana-pi.org/en/BPI-F3/SpacemiT_K1_datasheet [1]
> Link: https://developer.spacemit.com/#/documentation?token=BWbGwbx7liGW21kq9lucSA6Vnpb [2]
> Link: https://gitee.com/bianbu-linux/linux-6.1/blob/bl-v1.0.y/arch/riscv/boot/dts/spacemit/k1-x.dtsi [3]
> Signed-off-by: Yangyu Chen <cyy@...self.name>
> Signed-off-by: Yixun Lan <dlan@...too.org>

Acked-by: Jesse Taube <jesse@...osinc.com>

>
> ---
> Changes in v5:
>  - fix cache-sets
>  - Link to v4: https://lore.kernel.org/all/20240709-k1-01-basic-dt-v4-8-ae5bb5e56aaf@gentoo.org/
>
> Changes in v4:
>  - add i/d-cache, l2-cache info
>  - Link to v3: https://lore.kernel.org/all/20240703-k1-01-basic-dt-v3-8-12f73b47461e@gentoo.org/
> ---
>  arch/riscv/boot/dts/spacemit/k1.dtsi | 459 +++++++++++++++++++++++++++++++++++
>  1 file changed, 459 insertions(+)
>
> diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
> new file mode 100644
> index 0000000000000..0777bf9e01183
> --- /dev/null
> +++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
> @@ -0,0 +1,459 @@
> +// SPDX-License-Identifier: GPL-2.0 OR MIT
> +/*
> + * Copyright (C) 2024 Yangyu Chen <cyy@...self.name>
> + */
> +
> +/dts-v1/;
> +/ {
> +       #address-cells = <2>;
> +       #size-cells = <2>;
> +       model = "SpacemiT K1";
> +       compatible = "spacemit,k1";
> +
> +       aliases {
> +               serial0 = &uart0;
> +               serial1 = &uart2;
> +               serial2 = &uart3;
> +               serial3 = &uart4;
> +               serial4 = &uart5;
> +               serial5 = &uart6;
> +               serial6 = &uart7;
> +               serial7 = &uart8;
> +               serial8 = &uart9;
> +       };
> +
> +       cpus {
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +               timebase-frequency = <24000000>;
> +
> +               cpu-map {
> +                       cluster0 {
> +                               core0 {
> +                                       cpu = <&cpu_0>;
> +                               };
> +                               core1 {
> +                                       cpu = <&cpu_1>;
> +                               };
> +                               core2 {
> +                                       cpu = <&cpu_2>;
> +                               };
> +                               core3 {
> +                                       cpu = <&cpu_3>;
> +                               };
> +                       };
> +
> +                       cluster1 {
> +                               core0 {
> +                                       cpu = <&cpu_4>;
> +                               };
> +                               core1 {
> +                                       cpu = <&cpu_5>;
> +                               };
> +                               core2 {
> +                                       cpu = <&cpu_6>;
> +                               };
> +                               core3 {
> +                                       cpu = <&cpu_7>;
> +                               };
> +                       };
> +               };
> +
> +               cpu_0: cpu@0 {
> +                       compatible = "spacemit,x60", "riscv";
> +                       device_type = "cpu";
> +                       reg = <0>;
> +                       riscv,isa = "rv64imafdcv_zicbom_zicbop_zicboz_zicntr_zicond_zicsr_zifencei_zihintpause_zihpm_zfh_zba_zbb_zbc_zbs_zkt_zvfh_zvkt_sscofpmf_sstc_svinval_svnapot_svpbmt";
> +                       riscv,isa-base = "rv64i";
> +                       riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicbom",
> +                                              "zicbop", "zicboz", "zicntr", "zicond", "zicsr",
> +                                              "zifencei", "zihintpause", "zihpm", "zfh", "zba",
> +                                              "zbb", "zbc", "zbs", "zkt", "zvfh", "zvkt",
> +                                              "sscofpmf", "sstc", "svinval", "svnapot", "svpbmt";
> +                       riscv,cbom-block-size = <64>;
> +                       riscv,cbop-block-size = <64>;
> +                       riscv,cboz-block-size = <64>;
> +                       i-cache-block-size = <64>;
> +                       i-cache-size = <32768>;
> +                       i-cache-sets = <128>;
> +                       d-cache-block-size = <64>;
> +                       d-cache-size = <32768>;
> +                       d-cache-sets = <128>;
> +                       next-level-cache = <&cluster0_l2_cache>;
> +                       mmu-type = "riscv,sv39";
> +
> +                       cpu0_intc: interrupt-controller {
> +                               compatible = "riscv,cpu-intc";
> +                               interrupt-controller;
> +                               #interrupt-cells = <1>;
> +                       };
> +               };
> +
> +               cpu_1: cpu@1 {
> +                       compatible = "spacemit,x60", "riscv";
> +                       device_type = "cpu";
> +                       reg = <1>;
> +                       riscv,isa = "rv64imafdcv_zicbom_zicbop_zicboz_zicntr_zicond_zicsr_zifencei_zihintpause_zihpm_zfh_zba_zbb_zbc_zbs_zkt_zvfh_zvkt_sscofpmf_sstc_svinval_svnapot_svpbmt";
> +                       riscv,isa-base = "rv64i";
> +                       riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicbom",
> +                                              "zicbop", "zicboz", "zicntr", "zicond", "zicsr",
> +                                              "zifencei", "zihintpause", "zihpm", "zfh", "zba",
> +                                              "zbb", "zbc", "zbs", "zkt", "zvfh", "zvkt",
> +                                              "sscofpmf", "sstc", "svinval", "svnapot", "svpbmt";
> +                       riscv,cbom-block-size = <64>;
> +                       riscv,cbop-block-size = <64>;
> +                       riscv,cboz-block-size = <64>;
> +                       i-cache-block-size = <64>;
> +                       i-cache-size = <32768>;
> +                       i-cache-sets = <128>;
> +                       d-cache-block-size = <64>;
> +                       d-cache-size = <32768>;
> +                       d-cache-sets = <128>;
> +                       next-level-cache = <&cluster0_l2_cache>;
> +                       mmu-type = "riscv,sv39";
> +
> +                       cpu1_intc: interrupt-controller {
> +                               compatible = "riscv,cpu-intc";
> +                               interrupt-controller;
> +                               #interrupt-cells = <1>;
> +                       };
> +               };
> +
> +               cpu_2: cpu@2 {
> +                       compatible = "spacemit,x60", "riscv";
> +                       device_type = "cpu";
> +                       reg = <2>;
> +                       riscv,isa = "rv64imafdcv_zicbom_zicbop_zicboz_zicntr_zicond_zicsr_zifencei_zihintpause_zihpm_zfh_zba_zbb_zbc_zbs_zkt_zvfh_zvkt_sscofpmf_sstc_svinval_svnapot_svpbmt";
> +                       riscv,isa-base = "rv64i";
> +                       riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicbom",
> +                                              "zicbop", "zicboz", "zicntr", "zicond", "zicsr",
> +                                              "zifencei", "zihintpause", "zihpm", "zfh", "zba",
> +                                              "zbb", "zbc", "zbs", "zkt", "zvfh", "zvkt",
> +                                              "sscofpmf", "sstc", "svinval", "svnapot", "svpbmt";
> +                       riscv,cbom-block-size = <64>;
> +                       riscv,cbop-block-size = <64>;
> +                       riscv,cboz-block-size = <64>;
> +                       i-cache-block-size = <64>;
> +                       i-cache-size = <32768>;
> +                       i-cache-sets = <128>;
> +                       d-cache-block-size = <64>;
> +                       d-cache-size = <32768>;
> +                       d-cache-sets = <128>;
> +                       next-level-cache = <&cluster0_l2_cache>;
> +                       mmu-type = "riscv,sv39";
> +
> +                       cpu2_intc: interrupt-controller {
> +                               compatible = "riscv,cpu-intc";
> +                               interrupt-controller;
> +                               #interrupt-cells = <1>;
> +                       };
> +               };
> +
> +               cpu_3: cpu@3 {
> +                       compatible = "spacemit,x60", "riscv";
> +                       device_type = "cpu";
> +                       reg = <3>;
> +                       riscv,isa = "rv64imafdcv_zicbom_zicbop_zicboz_zicntr_zicond_zicsr_zifencei_zihintpause_zihpm_zfh_zba_zbb_zbc_zbs_zkt_zvfh_zvkt_sscofpmf_sstc_svinval_svnapot_svpbmt";
> +                       riscv,isa-base = "rv64i";
> +                       riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicbom",
> +                                              "zicbop", "zicboz", "zicntr", "zicond", "zicsr",
> +                                              "zifencei", "zihintpause", "zihpm", "zfh", "zba",
> +                                              "zbb", "zbc", "zbs", "zkt", "zvfh", "zvkt",
> +                                              "sscofpmf", "sstc", "svinval", "svnapot", "svpbmt";
> +                       riscv,cbom-block-size = <64>;
> +                       riscv,cbop-block-size = <64>;
> +                       riscv,cboz-block-size = <64>;
> +                       i-cache-block-size = <64>;
> +                       i-cache-size = <32768>;
> +                       i-cache-sets = <128>;
> +                       d-cache-block-size = <64>;
> +                       d-cache-size = <32768>;
> +                       d-cache-sets = <128>;
> +                       next-level-cache = <&cluster0_l2_cache>;
> +                       mmu-type = "riscv,sv39";
> +
> +                       cpu3_intc: interrupt-controller {
> +                               compatible = "riscv,cpu-intc";
> +                               interrupt-controller;
> +                               #interrupt-cells = <1>;
> +                       };
> +               };
> +
> +               cpu_4: cpu@4 {
> +                       compatible = "spacemit,x60", "riscv";
> +                       device_type = "cpu";
> +                       reg = <4>;
> +                       riscv,isa = "rv64imafdcv_zicbom_zicbop_zicboz_zicntr_zicond_zicsr_zifencei_zihintpause_zihpm_zfh_zba_zbb_zbc_zbs_zkt_zvfh_zvkt_sscofpmf_sstc_svinval_svnapot_svpbmt";
> +                       riscv,isa-base = "rv64i";
> +                       riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicbom",
> +                                              "zicbop", "zicboz", "zicntr", "zicond", "zicsr",
> +                                              "zifencei", "zihintpause", "zihpm", "zfh", "zba",
> +                                              "zbb", "zbc", "zbs", "zkt", "zvfh", "zvkt",
> +                                              "sscofpmf", "sstc", "svinval", "svnapot", "svpbmt";
> +                       riscv,cbom-block-size = <64>;
> +                       riscv,cbop-block-size = <64>;
> +                       riscv,cboz-block-size = <64>;
> +                       i-cache-block-size = <64>;
> +                       i-cache-size = <32768>;
> +                       i-cache-sets = <128>;
> +                       d-cache-block-size = <64>;
> +                       d-cache-size = <32768>;
> +                       d-cache-sets = <128>;
> +                       next-level-cache = <&cluster1_l2_cache>;
> +                       mmu-type = "riscv,sv39";
> +
> +                       cpu4_intc: interrupt-controller {
> +                               compatible = "riscv,cpu-intc";
> +                               interrupt-controller;
> +                               #interrupt-cells = <1>;
> +                       };
> +               };
> +
> +               cpu_5: cpu@5 {
> +                       compatible = "spacemit,x60", "riscv";
> +                       device_type = "cpu";
> +                       reg = <5>;
> +                       riscv,isa = "rv64imafdcv_zicbom_zicbop_zicboz_zicntr_zicond_zicsr_zifencei_zihintpause_zihpm_zfh_zba_zbb_zbc_zbs_zkt_zvfh_zvkt_sscofpmf_sstc_svinval_svnapot_svpbmt";
> +                       riscv,isa-base = "rv64i";
> +                       riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicbom",
> +                                              "zicbop", "zicboz", "zicntr", "zicond", "zicsr",
> +                                              "zifencei", "zihintpause", "zihpm", "zfh", "zba",
> +                                              "zbb", "zbc", "zbs", "zkt", "zvfh", "zvkt",
> +                                              "sscofpmf", "sstc", "svinval", "svnapot", "svpbmt";
> +                       riscv,cbom-block-size = <64>;
> +                       riscv,cbop-block-size = <64>;
> +                       riscv,cboz-block-size = <64>;
> +                       i-cache-block-size = <64>;
> +                       i-cache-size = <32768>;
> +                       i-cache-sets = <128>;
> +                       d-cache-block-size = <64>;
> +                       d-cache-size = <32768>;
> +                       d-cache-sets = <128>;
> +                       next-level-cache = <&cluster1_l2_cache>;
> +                       mmu-type = "riscv,sv39";
> +
> +                       cpu5_intc: interrupt-controller {
> +                               compatible = "riscv,cpu-intc";
> +                               interrupt-controller;
> +                               #interrupt-cells = <1>;
> +                       };
> +               };
> +
> +               cpu_6: cpu@6 {
> +                       compatible = "spacemit,x60", "riscv";
> +                       device_type = "cpu";
> +                       reg = <6>;
> +                       riscv,isa = "rv64imafdcv_zicbom_zicbop_zicboz_zicntr_zicond_zicsr_zifencei_zihintpause_zihpm_zfh_zba_zbb_zbc_zbs_zkt_zvfh_zvkt_sscofpmf_sstc_svinval_svnapot_svpbmt";
> +                       riscv,isa-base = "rv64i";
> +                       riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicbom",
> +                                              "zicbop", "zicboz", "zicntr", "zicond", "zicsr",
> +                                              "zifencei", "zihintpause", "zihpm", "zfh", "zba",
> +                                              "zbb", "zbc", "zbs", "zkt", "zvfh", "zvkt",
> +                                              "sscofpmf", "sstc", "svinval", "svnapot", "svpbmt";
> +                       riscv,cbom-block-size = <64>;
> +                       riscv,cbop-block-size = <64>;
> +                       riscv,cboz-block-size = <64>;
> +                       i-cache-block-size = <64>;
> +                       i-cache-size = <32768>;
> +                       i-cache-sets = <128>;
> +                       d-cache-block-size = <64>;
> +                       d-cache-size = <32768>;
> +                       d-cache-sets = <128>;
> +                       next-level-cache = <&cluster1_l2_cache>;
> +                       mmu-type = "riscv,sv39";
> +
> +                       cpu6_intc: interrupt-controller {
> +                               compatible = "riscv,cpu-intc";
> +                               interrupt-controller;
> +                               #interrupt-cells = <1>;
> +                       };
> +               };
> +
> +               cpu_7: cpu@7 {
> +                       compatible = "spacemit,x60", "riscv";
> +                       device_type = "cpu";
> +                       reg = <7>;
> +                       riscv,isa = "rv64imafdcv_zicbom_zicbop_zicboz_zicntr_zicond_zicsr_zifencei_zihintpause_zihpm_zfh_zba_zbb_zbc_zbs_zkt_zvfh_zvkt_sscofpmf_sstc_svinval_svnapot_svpbmt";
> +                       riscv,isa-base = "rv64i";
> +                       riscv,isa-extensions = "i", "m", "a", "f", "d", "c", "v", "zicbom",
> +                                              "zicbop", "zicboz", "zicntr", "zicond", "zicsr",
> +                                              "zifencei", "zihintpause", "zihpm", "zfh", "zba",
> +                                              "zbb", "zbc", "zbs", "zkt", "zvfh", "zvkt",
> +                                              "sscofpmf", "sstc", "svinval", "svnapot", "svpbmt";
> +                       riscv,cbom-block-size = <64>;
> +                       riscv,cbop-block-size = <64>;
> +                       riscv,cboz-block-size = <64>;
> +                       i-cache-block-size = <64>;
> +                       i-cache-size = <32768>;
> +                       i-cache-sets = <128>;
> +                       d-cache-block-size = <64>;
> +                       d-cache-size = <32768>;
> +                       d-cache-sets = <128>;
> +                       next-level-cache = <&cluster1_l2_cache>;
> +                       mmu-type = "riscv,sv39";
> +
> +                       cpu7_intc: interrupt-controller {
> +                               compatible = "riscv,cpu-intc";
> +                               interrupt-controller;
> +                               #interrupt-cells = <1>;
> +                       };
> +               };
> +
> +               cluster0_l2_cache: l2-cache0 {
> +                       compatible = "cache";
> +                       cache-block-size = <64>;
> +                       cache-level = <2>;
> +                       cache-size = <524288>;
> +                       cache-sets = <512>;
> +                       cache-unified;
> +               };
> +
> +               cluster1_l2_cache: l2-cache1 {
> +                       compatible = "cache";
> +                       cache-block-size = <64>;
> +                       cache-level = <2>;
> +                       cache-size = <524288>;
> +                       cache-sets = <512>;
> +                       cache-unified;
> +               };
> +       };
> +
> +       soc {
> +               compatible = "simple-bus";
> +               interrupt-parent = <&plic>;
> +               #address-cells = <2>;
> +               #size-cells = <2>;
> +               dma-noncoherent;
> +               ranges;
> +
> +               uart0: serial@...17000 {
> +                       compatible = "spacemit,k1-uart", "intel,xscale-uart";
> +                       reg = <0x0 0xd4017000 0x0 0x100>;
> +                       interrupts = <42>;
> +                       clock-frequency = <14857000>;
> +                       reg-shift = <2>;
> +                       reg-io-width = <4>;
> +                       status = "disabled";
> +               };
> +
> +               uart2: serial@...17100 {
> +                       compatible = "spacemit,k1-uart", "intel,xscale-uart";
> +                       reg = <0x0 0xd4017100 0x0 0x100>;
> +                       interrupts = <44>;
> +                       clock-frequency = <14857000>;
> +                       reg-shift = <2>;
> +                       reg-io-width = <4>;
> +                       status = "disabled";
> +               };
> +
> +               uart3: serial@...17200 {
> +                       compatible = "spacemit,k1-uart", "intel,xscale-uart";
> +                       reg = <0x0 0xd4017200 0x0 0x100>;
> +                       interrupts = <45>;
> +                       clock-frequency = <14857000>;
> +                       reg-shift = <2>;
> +                       reg-io-width = <4>;
> +                       status = "disabled";
> +               };
> +
> +               uart4: serial@...17300 {
> +                       compatible = "spacemit,k1-uart", "intel,xscale-uart";
> +                       reg = <0x0 0xd4017300 0x0 0x100>;
> +                       interrupts = <46>;
> +                       clock-frequency = <14857000>;
> +                       reg-shift = <2>;
> +                       reg-io-width = <4>;
> +                       status = "disabled";
> +               };
> +
> +               uart5: serial@...17400 {
> +                       compatible = "spacemit,k1-uart", "intel,xscale-uart";
> +                       reg = <0x0 0xd4017400 0x0 0x100>;
> +                       interrupts = <47>;
> +                       clock-frequency = <14857000>;
> +                       reg-shift = <2>;
> +                       reg-io-width = <4>;
> +                       status = "disabled";
> +               };
> +
> +               uart6: serial@...17500 {
> +                       compatible = "spacemit,k1-uart", "intel,xscale-uart";
> +                       reg = <0x0 0xd4017500 0x0 0x100>;
> +                       interrupts = <48>;
> +                       clock-frequency = <14857000>;
> +                       reg-shift = <2>;
> +                       reg-io-width = <4>;
> +                       status = "disabled";
> +               };
> +
> +               uart7: serial@...17600 {
> +                       compatible = "spacemit,k1-uart", "intel,xscale-uart";
> +                       reg = <0x0 0xd4017600 0x0 0x100>;
> +                       interrupts = <49>;
> +                       clock-frequency = <14857000>;
> +                       reg-shift = <2>;
> +                       reg-io-width = <4>;
> +                       status = "disabled";
> +               };
> +
> +               uart8: serial@...17700 {
> +                       compatible = "spacemit,k1-uart", "intel,xscale-uart";
> +                       reg = <0x0 0xd4017700 0x0 0x100>;
> +                       interrupts = <50>;
> +                       clock-frequency = <14857000>;
> +                       reg-shift = <2>;
> +                       reg-io-width = <4>;
> +                       status = "disabled";
> +               };
> +
> +               uart9: serial@...17800 {
> +                       compatible = "spacemit,k1-uart", "intel,xscale-uart";
> +                       reg = <0x0 0xd4017800 0x0 0x100>;
> +                       interrupts = <51>;
> +                       clock-frequency = <14857000>;
> +                       reg-shift = <2>;
> +                       reg-io-width = <4>;
> +                       status = "disabled";
> +               };
> +
> +               plic: interrupt-controller@...00000 {
> +                       compatible = "spacemit,k1-plic", "sifive,plic-1.0.0";
> +                       reg = <0x0 0xe0000000 0x0 0x4000000>;
> +                       interrupts-extended = <&cpu0_intc 11>, <&cpu0_intc 9>,
> +                                             <&cpu1_intc 11>, <&cpu1_intc 9>,
> +                                             <&cpu2_intc 11>, <&cpu2_intc 9>,
> +                                             <&cpu3_intc 11>, <&cpu3_intc 9>,
> +                                             <&cpu4_intc 11>, <&cpu4_intc 9>,
> +                                             <&cpu5_intc 11>, <&cpu5_intc 9>,
> +                                             <&cpu6_intc 11>, <&cpu6_intc 9>,
> +                                             <&cpu7_intc 11>, <&cpu7_intc 9>;
> +                       interrupt-controller;
> +                       #address-cells = <0>;
> +                       #interrupt-cells = <1>;
> +                       riscv,ndev = <159>;
> +               };
> +
> +               clint: timer@...00000 {
> +                       compatible = "spacemit,k1-clint", "sifive,clint0";
> +                       reg = <0x0 0xe4000000 0x0 0x10000>;
> +                       interrupts-extended = <&cpu0_intc 3>, <&cpu0_intc 7>,
> +                                             <&cpu1_intc 3>, <&cpu1_intc 7>,
> +                                             <&cpu2_intc 3>, <&cpu2_intc 7>,
> +                                             <&cpu3_intc 3>, <&cpu3_intc 7>,
> +                                             <&cpu4_intc 3>, <&cpu4_intc 7>,
> +                                             <&cpu5_intc 3>, <&cpu5_intc 7>,
> +                                             <&cpu6_intc 3>, <&cpu6_intc 7>,
> +                                             <&cpu7_intc 3>, <&cpu7_intc 7>;
> +               };
> +
> +               sec_uart1: serial@...12000 {
> +                       compatible = "spacemit,k1-uart", "intel,xscale-uart";
> +                       reg = <0x0 0xf0612000 0x0 0x100>;
> +                       interrupts = <43>;
> +                       clock-frequency = <14857000>;
> +                       reg-shift = <2>;
> +                       reg-io-width = <4>;
> +                       status = "reserved"; /* for TEE usage */
> +               };
> +       };
> +};
>
> --
> 2.45.2
>

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