Merge tag 'riscv-dt-for-v6.5-pt2' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux into soc/dt

RISC-V Devicetrees for v6.5 Part 2

T-Head:
Add a basic dtsi, Kconfig bits & trivial binding additions for the T-Head
1520 SoC (codename "light"). This SoC can be found on the Lichee Pi 4a,
for which a minimal dts is added.

Misc:
Re-sort the dts Makefile to be in alphanumerical order by directory.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>

* tag 'riscv-dt-for-v6.5-pt2' of https://git.kernel.org/pub/scm/linux/kernel/git/conor/linux:
  riscv: dts: sort makefile entries by directory
  riscv: defconfig: enable T-HEAD SoC
  MAINTAINERS: add entry for T-HEAD RISC-V SoC
  riscv: dts: thead: add sipeed Lichee Pi 4A board device tree
  riscv: dts: add initial T-HEAD TH1520 SoC device tree
  riscv: Add the T-HEAD SoC family Kconfig option
  dt-bindings: riscv: Add T-HEAD TH1520 board compatibles
  dt-bindings: timer: Add T-HEAD TH1520 clint
  dt-bindings: interrupt-controller: Add T-HEAD's TH1520 PLIC

Link: https://lore.kernel.org/r/20230620-fidelity-variety-60b47c889e31@spud
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Author: arndb

Documentation/devicetree/bindings/interrupt-controller/sifive,plic-1.0.0.yaml

@@ -65,6 +65,7 @@ properties:
       - items:
           - enum:
               - allwinner,sun20i-d1-plic
+              - thead,th1520-plic
           - const: thead,c900-plic
       - items:
           - const: sifive,plic-1.0.0

Documentation/devicetree/bindings/riscv/thead.yaml

@@ -0,0 +1,29 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/riscv/thead.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: T-HEAD SoC-based boards
+
+maintainers:
+  - Jisheng Zhang <jszhang@kernel.org>
+
+description:
+  T-HEAD SoC-based boards
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - description: Sipeed Lichee Pi 4A board for the Sipeed Lichee Module 4A
+        items:
+          - enum:
+              - sipeed,lichee-pi-4a
+          - const: sipeed,lichee-module-4a
+          - const: thead,th1520
+
+additionalProperties: true
+
+...

Documentation/devicetree/bindings/timer/sifive,clint.yaml

@@ -37,6 +37,7 @@ properties:
       - items:
           - enum:
               - allwinner,sun20i-d1-clint
+              - thead,th1520-clint
           - const: thead,c900-clint
       - items:
           - const: sifive,clint0

MAINTAINERS

@@ -18163,6 +18163,14 @@ F:	drivers/perf/riscv_pmu.c
 F:	drivers/perf/riscv_pmu_legacy.c
 F:	drivers/perf/riscv_pmu_sbi.c
 
+RISC-V THEAD SoC SUPPORT
+M:	Jisheng Zhang <jszhang@kernel.org>
+M:	Guo Ren <guoren@kernel.org>
+M:	Fu Wei <wefu@redhat.com>
+L:	linux-riscv@lists.infradead.org
+S:	Maintained
+F:	arch/riscv/boot/dts/thead/
+
 RNBD BLOCK DRIVERS
 M:	Md. Haris Iqbal <haris.iqbal@ionos.com>
 M:	Jack Wang <jinpu.wang@ionos.com>

arch/riscv/Kconfig.socs

@@ -41,6 +41,12 @@ config ARCH_SUNXI
 	  This enables support for Allwinner sun20i platform hardware,
 	  including boards based on the D1 and D1s SoCs.
 
+config ARCH_THEAD
+	bool "T-HEAD RISC-V SoCs"
+	select ERRATA_THEAD
+	help
+	  This enables support for the RISC-V based T-HEAD SoCs.
+
 config ARCH_VIRT
 	def_bool SOC_VIRT
 

arch/riscv/boot/dts/Makefile

@@ -1,9 +1,10 @@
 # SPDX-License-Identifier: GPL-2.0
 subdir-y += allwinner
-subdir-y += sifive
-subdir-y += starfive
 subdir-y += canaan
 subdir-y += microchip
 subdir-y += renesas
+subdir-y += sifive
+subdir-y += starfive
+subdir-y += thead
 
 obj-$(CONFIG_BUILTIN_DTB) := $(addsuffix /, $(subdir-y))

arch/riscv/boot/dts/thead/Makefile

@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+dtb-$(CONFIG_ARCH_THEAD) += th1520-lichee-pi-4a.dtb

arch/riscv/boot/dts/thead/th1520-lichee-module-4a.dtsi

@@ -0,0 +1,38 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 Jisheng Zhang <jszhang@kernel.org>
+ */
+
+/dts-v1/;
+
+#include "th1520.dtsi"
+
+/ {
+	model = "Sipeed Lichee Module 4A";
+	compatible = "sipeed,lichee-module-4a", "thead,th1520";
+
+	memory@0 {
+		device_type = "memory";
+		reg = <0x0 0x00000000 0x2 0x00000000>;
+	};
+};
+
+&osc {
+	clock-frequency = <24000000>;
+};
+
+&osc_32k {
+	clock-frequency = <32768>;
+};
+
+&apb_clk {
+	clock-frequency = <62500000>;
+};
+
+&uart_sclk {
+	clock-frequency = <100000000>;
+};
+
+&dmac0 {
+	status = "okay";
+};

arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2023 Jisheng Zhang <jszhang@kernel.org>
+ */
+
+#include "th1520-lichee-module-4a.dtsi"
+
+/ {
+	model = "Sipeed Lichee Pi 4A";
+	compatible = "sipeed,lichee-pi-4a", "sipeed,lichee-module-4a", "thead,th1520";
+
+	aliases {
+		gpio0 = &gpio0;
+		gpio1 = &gpio1;
+		gpio2 = &gpio2;
+		gpio3 = &gpio3;
+		serial0 = &uart0;
+		serial1 = &uart1;
+		serial2 = &uart2;
+		serial3 = &uart3;
+		serial4 = &uart4;
+		serial5 = &uart5;
+	};
+
+	chosen {
+		stdout-path = "serial0:115200n8";
+	};
+};
+
+&uart0 {
+	status = "okay";
+};