dt-bindings: reset: add support for canaan,k230-rst

Introduces a reset controller driver for the Kendryte K230 SoC,
resposible for managing the reset functionality of the CPUs and
various sub-modules.

Reviewed-by: Conor Dooley <[e-mail]>
Reviewed-by: Chen Wang <[e-mail]>
Signed-off-by: Junhui Liu <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Philipp Zabel <[e-mail]>

Documentation/devicetree/bindings/reset/canaan,k230-rst.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/canaan,k230-rst.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Canaan Kendryte K230 Reset Controller
+
+maintainers:
+  - Junhui Liu <[e-mail]>
+
+description:
+  The Canaan Kendryte K230 reset controller is part of the SoC's system
+  controller and controls the reset registers for CPUs and various peripherals.
+
+properties:
+  compatible:
+    const: canaan,k230-rst
+
+  reg:
+    maxItems: 1
+
+  '#reset-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - '#reset-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    reset-controller@91101000 {
+      compatible = "canaan,k230-rst";
+      reg = <0x91101000 0x1000>;
+      #reset-cells = <1>;
+    };

include/dt-bindings/reset/canaan,k230-rst.h

···
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
+/*
+ * Copyright (C) 2023-2024 Canaan Bright Sight Co., Ltd
+ * Copyright (C) 2024-2025 Junhui Liu <[e-mail]>
+ */
+#ifndef _DT_BINDINGS_CANAAN_K230_RST_H_
+#define _DT_BINDINGS_CANAAN_K230_RST_H_
+
+#define RST_CPU0		0
+#define RST_CPU1		1
+#define RST_CPU0_FLUSH		2
+#define RST_CPU1_FLUSH		3
+#define RST_AI			4
+#define RST_VPU			5
+#define RST_HISYS		6
+#define RST_HISYS_AHB		7
+#define RST_SDIO0		8
+#define RST_SDIO1		9
+#define RST_SDIO_AXI		10
+#define RST_USB0		11
+#define RST_USB1		12
+#define RST_USB0_AHB		13
+#define RST_USB1_AHB		14
+#define RST_SPI0		15
+#define RST_SPI1		16
+#define RST_SPI2		17
+#define RST_SEC			18
+#define RST_PDMA		19
+#define RST_SDMA		20
+#define RST_DECOMPRESS		21
+#define RST_SRAM		22
+#define RST_SHRM_AXIM		23
+#define RST_SHRM_AXIS		24
+#define RST_NONAI2D		25
+#define RST_MCTL		26
+#define RST_ISP			27
+#define RST_ISP_DW		28
+#define RST_DPU			29
+#define RST_DISP		30
+#define RST_GPU			31
+#define RST_AUDIO		32
+#define RST_TIMER0		33
+#define RST_TIMER1		34
+#define RST_TIMER2		35
+#define RST_TIMER3		36
+#define RST_TIMER4		37
+#define RST_TIMER5		38
+#define RST_TIMER_APB		39
+#define RST_HDI			40
+#define RST_WDT0		41
+#define RST_WDT1		42
+#define RST_WDT0_APB		43
+#define RST_WDT1_APB		44
+#define RST_TS_APB		45
+#define RST_MAILBOX		46
+#define RST_STC			47
+#define RST_PMU			48
+#define RST_LOSYS_APB		49
+#define RST_UART0		50
+#define RST_UART1		51
+#define RST_UART2		52
+#define RST_UART3		53
+#define RST_UART4		54
+#define RST_I2C0		55
+#define RST_I2C1		56
+#define RST_I2C2		57
+#define RST_I2C3		58
+#define RST_I2C4		59
+#define RST_JAMLINK0_APB	60
+#define RST_JAMLINK1_APB	61
+#define RST_JAMLINK2_APB	62
+#define RST_JAMLINK3_APB	63
+#define RST_CODEC_APB		64
+#define RST_GPIO_DB		65
+#define RST_GPIO_APB		66
+#define RST_ADC			67
+#define RST_ADC_APB		68
+#define RST_PWM_APB		69
+#define RST_SHRM_APB		70
+#define RST_CSI0		71
+#define RST_CSI1		72
+#define RST_CSI2		73
+#define RST_CSI_DPHY		74
+#define RST_ISP_AHB		75
+#define RST_M0			76
+#define RST_M1			77
+#define RST_M2			78
+#define RST_SPI2AXI		79
+
+#endif