[RFC PATCH 2/3] RISC-V: Initial DTS for Microchip ICICLE board
Ben Dooks
ben.dooks at codethink.co.uk
Tue Nov 3 05:59:34 EST 2020
On 30/10/2020 20:27, Atish Patra wrote:
> On Fri, Oct 30, 2020 at 2:05 AM Anup Patel <anup at brainfault.org> wrote:
>>
>> On Thu, Oct 29, 2020 at 4:58 AM Atish Patra <atish.patra at wdc.com> wrote:
>>>
>>> Add initial DTS for Microchip ICICLE board having only
>>> essential devcies (clocks, sdhci, ethernet, serial, etc).
>>>
>>> Signed-off-by: Atish Patra <atish.patra at wdc.com>
>>> ---
>>> arch/riscv/boot/dts/Makefile | 1 +
>>> arch/riscv/boot/dts/microchip/Makefile | 2 +
>>> .../microchip/microchip-icicle-kit-a000.dts | 313 ++++++++++++++++++
>>
>> I suggest we split this DTS into two parts:
>> 1. SOC (microchip-polarfire.dtsi)
>> 2. Board (microchip-icicle-kit-a000.dts)
>>
>> This will be much cleaner and aligned with what is done
>> on other architectures.
>>
>
> Sure. I will do that in v2.
>
>>> 3 files changed, 316 insertions(+)
>>> create mode 100644 arch/riscv/boot/dts/microchip/Makefile
>>> create mode 100644 arch/riscv/boot/dts/microchip/microchip-icicle-kit-a000.dts
>>>
>>> diff --git a/arch/riscv/boot/dts/Makefile b/arch/riscv/boot/dts/Makefile
>>> index ca1f8cbd78c0..3ea94ea0a18a 100644
>>> --- a/arch/riscv/boot/dts/Makefile
>>> +++ b/arch/riscv/boot/dts/Makefile
>>> @@ -1,5 +1,6 @@
>>> # SPDX-License-Identifier: GPL-2.0
>>> subdir-y += sifive
>>> subdir-y += kendryte
>>> +subdir-y += microchip
>>>
>>> obj-$(CONFIG_BUILTIN_DTB) := $(addsuffix /, $(subdir-y))
>>> diff --git a/arch/riscv/boot/dts/microchip/Makefile b/arch/riscv/boot/dts/microchip/Makefile
>>> new file mode 100644
>>> index 000000000000..55ad77521304
>>> --- /dev/null
>>> +++ b/arch/riscv/boot/dts/microchip/Makefile
>>> @@ -0,0 +1,2 @@
>>> +# SPDX-License-Identifier: GPL-2.0
>>> +dtb-$(CONFIG_SOC_MICROCHIP_POLARFIRE) += microchip-icicle-kit-a000.dtb
>>> diff --git a/arch/riscv/boot/dts/microchip/microchip-icicle-kit-a000.dts b/arch/riscv/boot/dts/microchip/microchip-icicle-kit-a000.dts
>>> new file mode 100644
>>> index 000000000000..5848920af55c
>>> --- /dev/null
>>> +++ b/arch/riscv/boot/dts/microchip/microchip-icicle-kit-a000.dts
>>> @@ -0,0 +1,313 @@
>>> +// SPDX-License-Identifier: GPL-2.0+
>>> +/* Copyright (c) 2020 Microchip Technology Inc */
>>> +
>>> +/dts-v1/;
>>> +
>>> +/* Clock frequency (in Hz) of the rtcclk */
>>> +#define RTCCLK_FREQ 1000000
>>> +
>>> +/ {
>>> + #address-cells = <2>;
>>> + #size-cells = <2>;
>>> + model = "Microchip PolarFire-SoC";
>>> + compatible = "microchip,polarfire-soc";
>>> +
>>> + chosen {
>>> + stdout-path = &serial0;
>>> + };
>>> +
>>> + cpus {
>>> + #address-cells = <1>;
>>> + #size-cells = <0>;
>>> + timebase-frequency = <RTCCLK_FREQ>;
>>> +
>>> + cpu at 0 {
>>> + clock-frequency = <0>;
>>> + compatible = "sifive,rocket0", "riscv";
>>> + device_type = "cpu";
>>> + i-cache-block-size = <64>;
>>> + i-cache-sets = <128>;
>>> + i-cache-size = <16384>;
>>> + reg = <0>;
>>> + riscv,isa = "rv64imac";
>>> + status = "disabled";
>>> +
>>> + cpu0_intc: interrupt-controller {
>>> + #interrupt-cells = <1>;
>>> + compatible = "riscv,cpu-intc";
>>> + interrupt-controller;
>>> + };
>>> + };
>>> +
>>> + cpu at 1 {
>>> + clock-frequency = <0>;
>>> + compatible = "sifive,rocket0", "riscv";
>>> + d-cache-block-size = <64>;
>>> + d-cache-sets = <64>;
>>> + d-cache-size = <32768>;
>>> + d-tlb-sets = <1>;
>>> + d-tlb-size = <32>;
>>> + device_type = "cpu";
>>> + i-cache-block-size = <64>;
>>> + i-cache-sets = <64>;
>>> + i-cache-size = <32768>;
>>> + i-tlb-sets = <1>;
>>> + i-tlb-size = <32>;
>>> + mmu-type = "riscv,sv39";
>>> + reg = <1>;
>>> + riscv,isa = "rv64imafdc";
>>> + tlb-split;
>>> + status = "okay";
>>> +
>>> + cpu1_intc: interrupt-controller {
>>> + #interrupt-cells = <1>;
>>> + compatible = "riscv,cpu-intc";
>>> + interrupt-controller;
>>> + };
>>> + };
>>> +
>>> + cpu at 2 {
>>> + clock-frequency = <0>;
>>> + compatible = "sifive,rocket0", "riscv";
>>> + d-cache-block-size = <64>;
>>> + d-cache-sets = <64>;
>>> + d-cache-size = <32768>;
>>> + d-tlb-sets = <1>;
>>> + d-tlb-size = <32>;
>>> + device_type = "cpu";
>>> + i-cache-block-size = <64>;
>>> + i-cache-sets = <64>;
>>> + i-cache-size = <32768>;
>>> + i-tlb-sets = <1>;
>>> + i-tlb-size = <32>;
>>> + mmu-type = "riscv,sv39";
>>> + reg = <2>;
>>> + riscv,isa = "rv64imafdc";
>>> + tlb-split;
>>> + status = "okay";
>>> +
>>> + cpu2_intc: interrupt-controller {
>>> + #interrupt-cells = <1>;
>>> + compatible = "riscv,cpu-intc";
>>> + interrupt-controller;
>>> + };
>>> + };
>>> +
>>> + cpu at 3 {
>>> + clock-frequency = <0>;
>>> + compatible = "sifive,rocket0", "riscv";
>>> + d-cache-block-size = <64>;
>>> + d-cache-sets = <64>;
>>> + d-cache-size = <32768>;
>>> + d-tlb-sets = <1>;
>>> + d-tlb-size = <32>;
>>> + device_type = "cpu";
>>> + i-cache-block-size = <64>;
>>> + i-cache-sets = <64>;
>>> + i-cache-size = <32768>;
>>> + i-tlb-sets = <1>;
>>> + i-tlb-size = <32>;
>>> + mmu-type = "riscv,sv39";
>>> + reg = <3>;
>>> + riscv,isa = "rv64imafdc";
>>> + tlb-split;
>>> + status = "okay";
>>> +
>>> + cpu3_intc: interrupt-controller {
>>> + #interrupt-cells = <1>;
>>> + compatible = "riscv,cpu-intc";
>>> + interrupt-controller;
>>> + };
>>> + };
>>> +
>>> + cpu at 4 {
>>> + clock-frequency = <0>;
>>> + compatible = "sifive,rocket0", "riscv";
>>> + d-cache-block-size = <64>;
>>> + d-cache-sets = <64>;
>>> + d-cache-size = <32768>;
>>> + d-tlb-sets = <1>;
>>> + d-tlb-size = <32>;
>>> + device_type = "cpu";
>>> + i-cache-block-size = <64>;
>>> + i-cache-sets = <64>;
>>> + i-cache-size = <32768>;
>>> + i-tlb-sets = <1>;
>>> + i-tlb-size = <32>;
>>> + mmu-type = "riscv,sv39";
>>> + reg = <4>;
>>> + riscv,isa = "rv64imafdc";
>>> + tlb-split;
>>> + status = "okay";
>>> + cpu4_intc: interrupt-controller {
>>> + #interrupt-cells = <1>;
>>> + compatible = "riscv,cpu-intc";
>>> + interrupt-controller;
>>> + };
>>> + };
>>> + };
>>> +
>>> + memory at 80000000 {
>>> + device_type = "memory";
>>> + reg = <0x0 0x80000000 0x0 0x40000000>;
>>> + clocks = <&clkcfg 26>;
>>> + };
>>> +
>>> + soc {
>>> + #address-cells = <2>;
>>> + #size-cells = <2>;
>>> + compatible = "simple-bus";
>>> + ranges;
>>> +
>>> + cache-controller at 2010000 {
>>> + compatible = "sifive,fu540-c000-ccache", "cache";
>>> + cache-block-size = <64>;
>>> + cache-level = <2>;
>>> + cache-sets = <1024>;
>>> + cache-size = <2097152>;
>>> + cache-unified;
>>> + interrupt-parent = <&plic>;
>>> + interrupts = <1 2 3>;
>>> + reg = <0x0 0x2010000 0x0 0x1000>;
>>> + };
>>> +
>>> + clint at 2000000 {
>>> + compatible = "riscv,clint0";
>>> + reg = <0x0 0x2000000 0x0 0xC000>;
>>> + 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>;
>>> + };
>>> +
>>> + plic: interrupt-controller at c000000 {
>>> + #interrupt-cells = <1>;
>>> + compatible = "sifive,plic-1.0.0";
>>> + reg = <0x0 0xc000000 0x0 0x4000000>;
>>> + riscv,ndev = <53>;
>>> + interrupt-controller;
>>> + interrupts-extended = <&cpu0_intc 11
>>> + &cpu1_intc 11 &cpu1_intc 9
>>> + &cpu2_intc 11 &cpu2_intc 9
>>> + &cpu3_intc 11 &cpu3_intc 9
>>> + &cpu4_intc 11 &cpu4_intc 9>;
>>> + };
>>> +
>>> + dma at 3000000 {
>>> + compatible = "sifive,fu540-c000-pdma";
>>> + reg = <0x0 0x3000000 0x0 0x8000>;
>>> + interrupt-parent = <&plic>;
>>> + interrupts = <23 24 25 26 27 28 29 30>;
>>> + #dma-cells = <1>;
>>> + };
>>> +
>>> + refclk: refclk {
>>> + compatible = "fixed-clock";
>>> + #clock-cells = <0>;
>>> + clock-frequency = <600000000>;
>>> + clock-output-names = "msspllclk";
>>> + };
>>> +
>>> + clkcfg: clkcfg at 20002000 {
>>> + compatible = "microchip,pfsoc-clkcfg";
>>> + reg = <0x0 0x20002000 0x0 0x1000>;
>>> + reg-names = "mss_sysreg";
>>> + clocks = <&refclk>;
>>> + #clock-cells = <1>;
>>> + clock-output-names = "cpuclk", "axiclk", "ahbclk", "ENVMclk", "MAC0clk", "MAC1clk", "MMCclk", "TIMERclk", "MMUART0clk", "MMUART1clk", "MMUART2clk", "MMUART3clk", "MMUART4clk", "SPI0clk", "SPI1clk", "I2C0clk", "I2C1clk", "CAN0clk", "CAN1clk", "USBclk", "RESERVED", "RTCclk", "QSPIclk", "GPIO0clk", "GPIO1clk", "GPIO2clk", "DDRCclk", "FIC0clk", "FIC1clk", "FIC2clk", "FIC3clk", "ATHENAclk", "CFMclk";
>>> + };
>>> +
H ow about doing something like
> clock-output-names = "cpuclk", "axiclk", "ahbclk", "ENVMclk", "MAC0clk", /* 0 -4 */
> "MAC1clk", "MMCclk", "TIMERclk", "MMUART0clk", "MMUART1clk", /* 5-9 */
this means we can easily work out what clocks are in which index
As per the previos email, I'd leave these all populated as coming back
and adding ones later is just going to be a pain with merge conflicts.
--
Ben Dooks http://www.codethink.co.uk/
Senior Engineer Codethink - Providing Genius
https://www.codethink.co.uk/privacy.html
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