dt-bindings: soc: spacemit: Add K3 reset support and IDs

Update the spacemit,k1-syscon.yaml binding to document K3 SoC reset
support.

K3 reset devices are registered at runtime as auxiliary devices by the
K3 CCU driver. Since K3 reuses the K1 syscon binding, there is no separate
YAML binding file for K3 resets.

Update #reset-cells description to document where reset IDs are defined.

Acked-by: Alex Elder <elder@riscstar.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Guodong Xu <guodong@riscstar.com>
Reviewed-by: Yixun Lan <dlan@kernel.org>
Link: https://lore.kernel.org/spacemit/20260114092742-GYC7933267@gentoo.org/ [1]
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>

1 files changed, 7 insertions, 1 deletions

diff --git a/Documentation/devicetree/bindings/soc/spacemit/spacemit,k1-syscon.yaml b/Documentation/devicetree/bindings/soc/spacemit/spacemit,k1-syscon.yaml
index 133a391ee68c..f0c6feb99be3 100644
--- a/Documentation/devicetree/bindings/soc/spacemit/spacemit,k1-syscon.yaml
+++ b/Documentation/devicetree/bindings/soc/spacemit/spacemit,k1-syscon.yaml
@@ -10,7 +10,7 @@ maintainers:
   - Haylen Chu <heylenay@4d2.org>
 
 description:
-  System controllers found on SpacemiT K1 SoC, which are capable of
+  System controllers found on SpacemiT K1/K3 SoC, which are capable of
   clock, reset and power-management functions.
 
 properties:
@@ -46,6 +46,12 @@ properties:
 
   "#reset-cells":
     const: 1
+    description: |
+      ID of the reset controller line. Valid IDs are defined in corresponding
+      files:
+
+      For SpacemiT K1, see include/dt-bindings/clock/spacemit,k1-syscon.h
+      For SpacemiT K3, see include/dt-bindings/reset/spacemit,k3-resets.h
 
 required:
   - compatible