arm64: dts: rockchip: add header for RK8XX PMIC constants

To make it easier to read the device tree, let's add constants for the
rockchip,reset-mode property values that are currently only applicable
to RK806 PMIC.

Signed-off-by: Quentin Schulz <quentin.schulz@cherry.de>
[dt-maintainers did not consider this part of the binding, so we're
 keeping the header in the devicetree directory]
Link: https://lore.kernel.org/r/20250627-rk8xx-rst-fun-v4-3-ce05d041b45f@cherry.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
[ upstream commit: 304be20e65ca08fc2e9cb58eb939a0054d8a8b81 ]

(cherry picked from commit 0e417bfcbc385c127c7f5ea01df6289aed8325c2)
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

diff --git a/dts/upstream/src/arm64/rockchip/rk8xx.h b/dts/upstream/src/arm64/rockchip/rk8xx.h
new file mode 100644 (file)
index 0000000..a6fbef7
--- /dev/null
+++ b/dts/upstream/src/arm64/rockchip/rk8xx.h
@@ -0,0 +1,18 @@
+/* SPDX-License-Identifier: (GPL-2.0-or-later OR MIT) */
+/*
+ * Device Tree defines for Rockchip RK8xx PMICs
+ *
+ * Copyright 2025 Cherry Embedded Solutions GmbH
+ *
+ * Author: Quentin Schulz <quentin.schulz@cherry.de>
+ */
+
+#ifndef _DT_MFD_ROCKCHIP_RK8XX_H
+#define _DT_MFD_ROCKCHIP_RK8XX_H
+
+/* For use with rockchip,reset-mode property */
+#define RK806_RESTART          0
+#define RK806_RESET            1
+#define RK806_RESET_NOTIFY     2
+
+#endif