Enable UART0 as it's the boot UART used by firmware.
Signed-off-by: Yao Zi <ziyao@disroot.org>
---
arch/loongarch/boot/dts/Makefile | 1 +
.../boot/dts/ls2k0300-ctcisz-forever-pi.dts | 45 +++++++++++++++++++
2 files changed, 46 insertions(+)
create mode 100644 arch/loongarch/boot/dts/ls2k0300-ctcisz-forever-pi.dts
diff --git a/arch/loongarch/boot/dts/Makefile b/arch/loongarch/boot/dts/Makefile
index 15d5e14fe418..9fff9e8be3de 100644
--- a/arch/loongarch/boot/dts/Makefile
+++ b/arch/loongarch/boot/dts/Makefile
@@ -1,3 +1,4 @@
# SPDX-License-Identifier: GPL-2.0-only
dtb-y = loongson-2k0500-ref.dtb loongson-2k1000-ref.dtb loongson-2k2000-ref.dtb
+dtb-y += ls2k0300-ctcisz-forever-pi.dtb
diff --git a/arch/loongarch/boot/dts/ls2k0300-ctcisz-forever-pi.dts b/arch/loongarch/boot/dts/ls2k0300-ctcisz-forever-pi.dts
new file mode 100644
index 000000000000..a033c086461f
--- /dev/null
+++ b/arch/loongarch/boot/dts/ls2k0300-ctcisz-forever-pi.dts
@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2025 Yao Zi <ziyao@disroot.org>
+ */
+
+/dts-v1/;
+
+#include "loongson-2k0300.dtsi"
+
+/ {
+ compatible = "ctcisz,forever-pi", "loongson,ls2k0300";
+ model = "CTCISZ Forever Pi";
+
+ aliases {
+ serial0 = &uart0;
+ };
+
+ chosen {
+ stdout-path = "serial0:115200n8";
+ };
+
+ memory@200000 {
+ device_type = "memory";
+ reg = <0 0x00200000 0 0x0ee00000>,
+ <0 0x90000000 0 0x10000000>;
+ };
+
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ linux,cma {
+ compatible = "shared-dma-pool";
+ reusable;
+ size = <0 0x02000000>;
+ linux,cma-default;
+ };
+ };
+};
+
+&uart0 {
+ clock-frequency = <100000000>;
+ status = "okay";
+};
--
2.49.0Hi Yao:
On Sun, May 18, 2025 at 4:05 PM Yao Zi <ziyao@disroot.org> wrote:
>
> Enable UART0 as it's the boot UART used by firmware.
>
> Signed-off-by: Yao Zi <ziyao@disroot.org>
> ---
> arch/loongarch/boot/dts/Makefile | 1 +
> .../boot/dts/ls2k0300-ctcisz-forever-pi.dts | 45 +++++++++++++++++++
A minor suggestion:
As we can see, the existing dtsi/dts files are prefixed with
“loongosn-2k”, would it be possible to keep the filenames consistent?
> 2 files changed, 46 insertions(+)
> create mode 100644 arch/loongarch/boot/dts/ls2k0300-ctcisz-forever-pi.dts
>
> diff --git a/arch/loongarch/boot/dts/Makefile b/arch/loongarch/boot/dts/Makefile
> index 15d5e14fe418..9fff9e8be3de 100644
> --- a/arch/loongarch/boot/dts/Makefile
> +++ b/arch/loongarch/boot/dts/Makefile
> @@ -1,3 +1,4 @@
> # SPDX-License-Identifier: GPL-2.0-only
>
> dtb-y = loongson-2k0500-ref.dtb loongson-2k1000-ref.dtb loongson-2k2000-ref.dtb
> +dtb-y += ls2k0300-ctcisz-forever-pi.dtb
> diff --git a/arch/loongarch/boot/dts/ls2k0300-ctcisz-forever-pi.dts b/arch/loongarch/boot/dts/ls2k0300-ctcisz-forever-pi.dts
> new file mode 100644
> index 000000000000..a033c086461f
> --- /dev/null
> +++ b/arch/loongarch/boot/dts/ls2k0300-ctcisz-forever-pi.dts
> @@ -0,0 +1,45 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2025 Yao Zi <ziyao@disroot.org>
> + */
> +
> +/dts-v1/;
> +
> +#include "loongson-2k0300.dtsi"
> +
> +/ {
> + compatible = "ctcisz,forever-pi", "loongson,ls2k0300";
> + model = "CTCISZ Forever Pi";
> +
> + aliases {
> + serial0 = &uart0;
> + };
> +
> + chosen {
> + stdout-path = "serial0:115200n8";
> + };
> +
> + memory@200000 {
> + device_type = "memory";
> + reg = <0 0x00200000 0 0x0ee00000>,
> + <0 0x90000000 0 0x10000000>;
> + };
> +
> + reserved-memory {
> + #address-cells = <2>;
> + #size-cells = <2>;
> + ranges;
> +
> + linux,cma {
> + compatible = "shared-dma-pool";
> + reusable;
> + size = <0 0x02000000>;
> + linux,cma-default;
> + };
> + };
> +};
> +
> +&uart0 {
> + clock-frequency = <100000000>;
> + status = "okay";
> +};
> --
> 2.49.0
>
>
--
Thanks.
Binbin
On Mon, May 19, 2025 at 03:58:29PM +0800, Binbin Zhou wrote: > Hi Yao: > > On Sun, May 18, 2025 at 4:05 PM Yao Zi <ziyao@disroot.org> wrote: > > > > Enable UART0 as it's the boot UART used by firmware. > > > > Signed-off-by: Yao Zi <ziyao@disroot.org> > > --- > > arch/loongarch/boot/dts/Makefile | 1 + > > .../boot/dts/ls2k0300-ctcisz-forever-pi.dts | 45 +++++++++++++++++++ > > A minor suggestion: > As we can see, the existing dtsi/dts files are prefixed with > “loongosn-2k”, would it be possible to keep the filenames consistent? It's abbreviated since loongson-2k0300-ctcisz-forever-pi.dts seems a little too long for me, and naming devicetree files in form of <abbreviated-SoC-name>-<vendor>-<model> is common on other architectures. I won't insist and will change it if you consider consistency really matters. > > 2 files changed, 46 insertions(+) > > create mode 100644 arch/loongarch/boot/dts/ls2k0300-ctcisz-forever-pi.dts ... > -- > Thanks. > Binbin Best regards, Yao Zi
On Mon, May 19, 2025 at 5:43 PM Yao Zi <ziyao@disroot.org> wrote: > > On Mon, May 19, 2025 at 03:58:29PM +0800, Binbin Zhou wrote: > > Hi Yao: > > > > On Sun, May 18, 2025 at 4:05 PM Yao Zi <ziyao@disroot.org> wrote: > > > > > > Enable UART0 as it's the boot UART used by firmware. > > > > > > Signed-off-by: Yao Zi <ziyao@disroot.org> > > > --- > > > arch/loongarch/boot/dts/Makefile | 1 + > > > .../boot/dts/ls2k0300-ctcisz-forever-pi.dts | 45 +++++++++++++++++++ > > > > A minor suggestion: > > As we can see, the existing dtsi/dts files are prefixed with > > “loongosn-2k”, would it be possible to keep the filenames consistent? > > It's abbreviated since loongson-2k0300-ctcisz-forever-pi.dts seems a > little too long for me, and naming devicetree files in form of > <abbreviated-SoC-name>-<vendor>-<model> is common on other > architectures. Sorry, the length of the filename is not really a major concern for me. > > I won't insist and will change it if you consider consistency really > matters. Yes, I actually do mind, let's keep the naming consistent. > > > > 2 files changed, 46 insertions(+) > > > create mode 100644 arch/loongarch/boot/dts/ls2k0300-ctcisz-forever-pi.dts > > ... > > > -- > > Thanks. > > Binbin > > Best regards, > Yao Zi -- Thanks. Binbin
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