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Message-ID: <CAKQ-crhDHXZptWr5rO5Rb9JttQREoPqE4YO-6nzC2OWc-z06_g@mail.gmail.com>
Date: Mon, 31 Jan 2022 11:51:23 +0100
From: Luka Perkov <luka.perkov@...tura.hr>
To: Felix Fietkau <nbd@....name>
Cc: Russell King <linux@...linux.org.uk>,
Arnd Bergmann <arnd@...db.de>, Olof Johansson <olof@...om.net>,
soc@...nel.org, Rob Herring <robh+dt@...nel.org>,
linux-mediatek@...ts.infradead.org,
Linux ARM <linux-arm-kernel@...ts.infradead.org>,
John Crispin <john@...ozen.org>, linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org, Robert Marko <robert.marko@...tura.hr>
Subject: Re: [PATCH v9 03/13] ARM: Add basic support for Airoha EN7523 SoC
Hello Felix,
On Sun, Jan 30, 2022 at 3:56 PM Felix Fietkau <nbd@....name> wrote:
>
> From: John Crispin <john@...ozen.org>
>
> EN7523 is an armv8 based silicon used inside broadband access type devices
> such as xPON and xDSL. It shares various silicon blocks with MediaTek
> silicon such as the MT7622.
>
> Add basic support for Airoha EN7523, enough for booting to console.
>
> The UART is basically 8250-compatible, except for the clock selection.
> A clock-frequency value is synthesized to get this to run at 115200 bps.
>
> Signed-off-by: John Crispin <john@...ozen.org>
> Signed-off-by: Bert Vermeulen <bert@...t.com>
> Signed-off-by: Felix Fietkau <nbd@....name>
> ---
> arch/arm/Kconfig | 12 ++++
> arch/arm/Makefile | 1 +
> arch/arm/boot/dts/Makefile | 2 +
> arch/arm/boot/dts/en7523-evb.dts | 27 +++++++
> arch/arm/boot/dts/en7523.dtsi | 117 +++++++++++++++++++++++++++++++
> arch/arm/mach-airoha/Makefile | 2 +
> arch/arm/mach-airoha/airoha.c | 16 +++++
> 7 files changed, 177 insertions(+)
> create mode 100644 arch/arm/boot/dts/en7523-evb.dts
> create mode 100644 arch/arm/boot/dts/en7523.dtsi
> create mode 100644 arch/arm/mach-airoha/Makefile
> create mode 100644 arch/arm/mach-airoha/airoha.c
>
> diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
> index 796fc8017f5d..57ef390d3146 100644
> --- a/arch/arm/Kconfig
> +++ b/arch/arm/Kconfig
> @@ -572,6 +572,18 @@ config ARCH_VIRT
> select HAVE_ARM_ARCH_TIMER
> select ARCH_SUPPORTS_BIG_ENDIAN
>
> +config ARCH_AIROHA
> + bool "Airoha SoC Support"
> + depends on ARCH_MULTI_V7
> + select ARM_AMBA
> + select ARM_GIC
> + select ARM_GIC_V3
> + select ARM_PSCI
> + select HAVE_ARM_ARCH_TIMER
> + select COMMON_CLK
> + help
> + Support for Airoha EN7523 SoCs
> +
> #
> # This is sorted alphabetically by mach-* pathname. However, plat-*
> # Kconfigs may be included either alphabetically (according to the
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index 77172d555c7e..34baf885573a 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -160,6 +160,7 @@ textofs-$(CONFIG_ARCH_AXXIA) := 0x00308000
> # Machine directory name. This list is sorted alphanumerically
> # by CONFIG_* macro name.
> machine-$(CONFIG_ARCH_ACTIONS) += actions
> +machine-$(CONFIG_ARCH_AIROHA) += airoha
> machine-$(CONFIG_ARCH_ALPINE) += alpine
> machine-$(CONFIG_ARCH_ARTPEC) += artpec
> machine-$(CONFIG_ARCH_ASPEED) += aspeed
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index e41eca79c950..5c2dd47b58b0 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -187,6 +187,8 @@ dtb-$(CONFIG_ARCH_DAVINCI) += \
> da850-lego-ev3.dtb
> dtb-$(CONFIG_ARCH_DIGICOLOR) += \
> cx92755_equinox.dtb
> +dtb-$(CONFIG_ARCH_AIROHA) += \
> + en7523-evb.dtb
> dtb-$(CONFIG_ARCH_EXYNOS3) += \
> exynos3250-artik5-eval.dtb \
> exynos3250-monk.dtb \
> diff --git a/arch/arm/boot/dts/en7523-evb.dts b/arch/arm/boot/dts/en7523-evb.dts
> new file mode 100644
> index 000000000000..69754ef9a628
> --- /dev/null
> +++ b/arch/arm/boot/dts/en7523-evb.dts
> @@ -0,0 +1,27 @@
> +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +/dts-v1/;
> +
> +/* Bootloader installs ATF here */
> +/memreserve/ 0x80000000 0x200000;
> +
> +#include "en7523.dtsi"
> +
> +/ {
> + model = "Airoha EN7523 Evaluation Board";
> + compatible = "airoha,en7523-evb", "airoha,en7523";
> +
> + aliases {
> + serial0 = &uart1;
> + };
> +
> + chosen {
> + bootargs = "console=ttyS0,115200 earlycon";
> + stdout-path = "serial0:115200n8";
> + linux,usable-memory-range = <0x80200000 0x1fe00000>;
> + };
> +
> + memory@...00000 {
> + device_type = "memory";
> + reg = <0x80000000 0x20000000>;
> + };
> +};
> diff --git a/arch/arm/boot/dts/en7523.dtsi b/arch/arm/boot/dts/en7523.dtsi
> new file mode 100644
> index 000000000000..f1d4c03aad89
> --- /dev/null
> +++ b/arch/arm/boot/dts/en7523.dtsi
> @@ -0,0 +1,117 @@
> +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {
> + interrupt-parent = <&gic>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> +
> + reserved-memory {
> + #address-cells = <1>;
> + #size-cells = <1>;
> + ranges;
> +
> + npu_binary@...00000 {
> + no-map;
> + reg = <0x84000000 0xA00000>;
> + };
> +
> + npu_flag@...0000 {
> + no-map;
> + reg = <0x84B00000 0x100000>;
> + };
> +
> + npu_pkt@...00000 {
> + no-map;
> + reg = <0x85000000 0x1A00000>;
> + };
> +
> + npu_phyaddr@...00000 {
> + no-map;
> + reg = <0x86B00000 0x100000>;
> + };
> +
> + npu_rxdesc@...00000 {
> + no-map;
> + reg = <0x86D00000 0x100000>;
> + };
> + };
> +
> + psci {
> + compatible = "arm,psci-0.2";
> + method = "smc";
> + };
> +
> + cpus {
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + cpu-map {
> + cluster0 {
> + core0 {
> + cpu = <&cpu0>;
> + };
> + core1 {
> + cpu = <&cpu1>;
> + };
> + };
> + };
> +
> + cpu0: cpu@0 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x0>;
> + enable-method = "psci";
> + clock-frequency = <80000000>;
> + next-level-cache = <&L2_0>;
> + };
> +
> + cpu1: cpu@1 {
> + device_type = "cpu";
> + compatible = "arm,cortex-a53";
> + reg = <0x1>;
> + enable-method = "psci";
> + clock-frequency = <80000000>;
> + next-level-cache = <&L2_0>;
> + };
> +
> + L2_0: l2-cache0 {
> + compatible = "cache";
> + };
> + };
> +
> + gic: interrupt-controller@...0000 {
> + compatible = "arm,gic-v3";
> + interrupt-controller;
> + #interrupt-cells = <3>;
> + #address-cells = <1>;
> + #size-cells = <1>;
> + reg = <0x09000000 0x20000>,
> + <0x09080000 0x80000>,
> + <0x09400000 0x2000>,
> + <0x09500000 0x2000>,
> + <0x09600000 0x20000>;
> + interrupts = <GIC_PPI 9 IRQ_TYPE_LEVEL_LOW>;
> + };
> +
> + 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>;
> + };
> +
> + uart1: serial@...f0000 {
> + compatible = "ns16550";
> + reg = <0x1fbf0000 0x30>;
> + reg-io-width = <4>;
> + reg-shift = <2>;
> + interrupts = <GIC_SPI 18 IRQ_TYPE_LEVEL_HIGH>;
> + clock-frequency = <1843200>;
> + status = "okay";
> + };
> +};
> diff --git a/arch/arm/mach-airoha/Makefile b/arch/arm/mach-airoha/Makefile
> new file mode 100644
> index 000000000000..a5857d0d02eb
> --- /dev/null
> +++ b/arch/arm/mach-airoha/Makefile
> @@ -0,0 +1,2 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +obj-y += airoha.o
> diff --git a/arch/arm/mach-airoha/airoha.c b/arch/arm/mach-airoha/airoha.c
> new file mode 100644
> index 000000000000..ea23b5abb478
> --- /dev/null
> +++ b/arch/arm/mach-airoha/airoha.c
> @@ -0,0 +1,16 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Device Tree support for Airoha SoCs
> + *
> + * Copyright (c) 2022 Felix Fietkau <nbd@....name>
> + */
> +#include <asm/mach/arch.h>
> +
> +static const char * const airoha_board_dt_compat[] = {
> + "airoha,en7523",
> + NULL,
> +};
> +
> +DT_MACHINE_START(MEDIATEK_DT, "Airoha Cortex-A53 (Device Tree)")
Since this is Cortex-A53 core is there a reason why this is not placed
within arm64 directory?
Thanks,
Luka
> + .dt_compat = airoha_board_dt_compat,
> +MACHINE_END
> --
> 2.32.0 (Apple Git-132)
>
>
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