[PATCH] dt-bindings: soc: canaan: Add K230 power domain bindings

[q691800735 at 163.com]

From: jybruceupup <q691800735 at 163.com>

Add device tree bindings for the Kendryte K230 power management domains
(PM domains), which control power gating of core peripherals (I2C, SPI,
MMC, AI2D).

Key properties:
- compatible: "canaan,k230-pm-domains"

This binding follows the Devicetree Specification v0.4 and upstream
PM domain framework requirements. It is a prerequisite for peripheral
drivers requiring power gating control.

Signed-off-by: jybruceupup <q691800735 at 163.com>
---
 MAINTAINERS                                      |  1 +
 include/dt-bindings/soc/canaan,k230_pm_domains.h | 13 +++++++++++++
 2 files changed, 14 insertions(+)
 create mode 100644 include/dt-bindings/soc/canaan,k230_pm_domains.h

diff --git a/MAINTAINERS b/MAINTAINERS
index 4d456982a..13cdbf647 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -22106,6 +22106,7 @@ P:	Documentation/arch/riscv/patch-acceptance.rst
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git
 F:	arch/riscv/
 F:	arch/riscv/configs/k230_defconfig
+F:	include/dt-bindings/soc/canaan,k230_pm_domains.h
 N:	riscv
 K:	riscv
 
diff --git a/include/dt-bindings/soc/canaan,k230_pm_domains.h b/include/dt-bindings/soc/canaan,k230_pm_domains.h
new file mode 100644
index 000000000..e212126e4
--- /dev/null
+++ b/include/dt-bindings/soc/canaan,k230_pm_domains.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _DT_BINDINGS_SOC_K230_PM_DOMAINS_H
+#define _DT_BINDINGS_SOC_K230_PM_DOMAINS_H
+
+#define K230_PM_DOMAIN_CPU1       0       /* CPU1 subsystem */
+#define K230_PM_DOMAIN_AI         1       /* AI Subsystem */
+#define K230_PM_DOMAIN_DISP       2       /* Display, 2.5D Engine */
+#define K230_PM_DOMAIN_VPU        3       /* Video subsystem */
+#define K230_PM_DOMAIN_DPU        4       /* 3D-struct Engine */
+#define K230_PM_DOMAIN_MAX        5
+
+#endif /* _DT_BINDINGS_SOC_K230_PM_DOMAINS_H */
-- 
2.52.0