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

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Date:   Fri, 6 Mar 2020 16:03:40 +0300
From:   <Sergey.Semin@...kalelectronics.ru>
To:     Sebastian Reichel <sre@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>
CC:     Serge Semin <Sergey.Semin@...kalelectronics.ru>,
        Serge Semin <fancer.lancer@...il.com>,
        Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Paul Burton <paulburton@...nel.org>,
        Ralf Baechle <ralf@...ux-mips.org>, <linux-pm@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/4] dt-bindings: power: reset: Add regmap support to the SYSCON reboot-mode bindings

From: Serge Semin <Sergey.Semin@...kalelectronics.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@...kalelectronics.ru>
Signed-off-by: Alexey Malahov <Alexey.Malahov@...kalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Cc: Paul Burton <paulburton@...nel.org>
Cc: Ralf Baechle <ralf@...ux-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