Hi Jisheng,
On 5/18/23 10:22, Jisheng Zhang wrote:
> Sipeed manufactures a M1s system-on-module and dock board, add basic
> support for them.
>
> Signed-off-by: Jisheng Zhang <jszhang@xxxxxxxxxx>
> Acked-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
> ---
> arch/riscv/boot/dts/Makefile | 1 +
> arch/riscv/boot/dts/bouffalolab/Makefile | 2 ++
> .../dts/bouffalolab/bl808-sipeed-m1s-dock.dts | 25 +++++++++++++++++++
> .../dts/bouffalolab/bl808-sipeed-m1s.dtsi | 21 ++++++++++++++++
> 4 files changed, 49 insertions(+)
> create mode 100644 arch/riscv/boot/dts/bouffalolab/Makefile
> create mode 100644 arch/riscv/boot/dts/bouffalolab/bl808-sipeed-m1s-dock.dts
> create mode 100644 arch/riscv/boot/dts/bouffalolab/bl808-sipeed-m1s.dtsi
>
> diff --git a/arch/riscv/boot/dts/Makefile b/arch/riscv/boot/dts/Makefile
> index f0d9f89054f8..133e6c38c9b0 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 += allwinner
> +subdir-y += bouffalolab
> subdir-y += sifive
> subdir-y += starfive
> subdir-y += canaan
> diff --git a/arch/riscv/boot/dts/bouffalolab/Makefile b/arch/riscv/boot/dts/bouffalolab/Makefile
> new file mode 100644
> index 000000000000..5419964e892d
> --- /dev/null
> +++ b/arch/riscv/boot/dts/bouffalolab/Makefile
> @@ -0,0 +1,2 @@
> +# SPDX-License-Identifier: GPL-2.0
> +dtb-$(CONFIG_SOC_BOUFFALOLAB) += bl808-sipeed-m1s-dock.dtb
> diff --git a/arch/riscv/boot/dts/bouffalolab/bl808-sipeed-m1s-dock.dts b/arch/riscv/boot/dts/bouffalolab/bl808-sipeed-m1s-dock.dts
> new file mode 100644
> index 000000000000..aa6cf909cd4d
> --- /dev/null
> +++ b/arch/riscv/boot/dts/bouffalolab/bl808-sipeed-m1s-dock.dts
> @@ -0,0 +1,25 @@
> +// SPDX-License-Identifier: (GPL-2.0+ or MIT)
> +/*
> + * Copyright (C) 2022 Jisheng Zhang <jszhang@xxxxxxxxxx>
> + */
> +
> +/dts-v1/;
> +
> +#include "bl808-sipeed-m1s.dtsi"
> +
> +/ {
> + model = "Sipeed M1s Dock";
> + compatible = "sipeed,m1s-dock", "sipeed,m1s", "bouffalolab,bl808";
> +
> + aliases {
> + serial3 = &uart3;
> + };
> +
> + chosen {
> + stdout-path = "serial3:2000000n8";
> + };
> +};
> +
> +&uart3 {
> + status = "okay";
> +};
> diff --git a/arch/riscv/boot/dts/bouffalolab/bl808-sipeed-m1s.dtsi b/arch/riscv/boot/dts/bouffalolab/bl808-sipeed-m1s.dtsi
> new file mode 100644
> index 000000000000..5026de768534
> --- /dev/null
> +++ b/arch/riscv/boot/dts/bouffalolab/bl808-sipeed-m1s.dtsi
> @@ -0,0 +1,21 @@
> +// SPDX-License-Identifier: (GPL-2.0+ or MIT)
> +/*
> + * Copyright (C) 2022 Jisheng Zhang <jszhang@xxxxxxxxxx>
> + */
> +
> +/dts-v1/;
> +
> +#include "bl808.dtsi"
> +
> +/ {
> + compatible = "sipeed,m1s", "bouffalolab,bl808";
> +
> + memory@50000000 {
> + device_type = "memory";
> + reg = <0x50000000 0x04000000>;
> + };
Especially since the SoC contains three heterogeneous CPUs, the firmware
may want to divide the PSRAM among them, so I do not think it is a good
idea to define this statically. (Or would all of the DTs contain this
same node, and then use reserved-memory nodes to cover the other CPUs'
allocations?)
Regards,
Samuel
> +};
> +
> +&xtal {
> + clock-frequency = <40000000>;
> +};
