[PATCH 3/4] dt-bindings: power: reset: Add regmap support to the SYSCON reboot-mode bindings

[<Sergey.Semin@baikalelectronics.ru>]

From: Serge Semin <Sergey.Semin@baikalelectronics.ru>

Optional regmap property will be used to refer to a syscon-controller
having a reboot tolerant register mapped.

Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Signed-off-by: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Paul Burton <paulburton@kernel.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
---
 .../bindings/power/reset/syscon-reboot-mode.yaml         | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml
index e09bb07b1abb..f47bf52ad983 100644
--- a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml
+++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml
@@ -13,9 +13,8 @@ description: |
   This driver gets reboot mode magic value from reboot-mode driver
   and stores it in a SYSCON mapped register. Then the bootloader
   can read it and take different action according to the magic
-  value stored. The SYSCON mapped register is retrieved from the
-  parental dt-node plus the offset. So the SYSCON reboot-mode node
-  should be represented as a sub-node of a "syscon", "simple-mfd" node.
+  value stored. The SYSCON mapped register is retrieved either from
+  the parental dt-node or from a regmap phandle plus the offset.
 
 properties:
   compatible:
@@ -29,6 +28,10 @@ properties:
     $ref: /schemas/types.yaml#/definitions/uint32
     description: Offset in the register map for the mode register (in bytes).
 
+  regmap:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: Phandle to the register map node.
+
 patternProperties:
   "^mode-.+":
     $ref: /schemas/types.yaml#/definitions/uint32
-- 
2.25.1