[PATCH 1/4] dt-bindings: mfd: introduce the TC9564 config syscon

[Alex Elder <elder@riscstar.com>]

Define the binding for a system controller used in the Toshiba
TC9564 SoC.

Co-developed-by: Daniel Thompson <daniel@riscstar.com>
Signed-off-by: Daniel Thompson <daniel@riscstar.com>
Signed-off-by: Alex Elder <elder@riscstar.com>
---
 .../bindings/mfd/toshiba,tc9564.yaml          | 56 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 57 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/toshiba,tc9564.yaml

diff --git a/Documentation/devicetree/bindings/mfd/toshiba,tc9564.yaml b/Documentation/devicetree/bindings/mfd/toshiba,tc9564.yaml
new file mode 100644
index 0000000000000..32e73a727c82a
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/toshiba,tc9564.yaml
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/toshiba,tc9564.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Toshiba TC9564 System Controller
+
+maintainers:
+  - Alex Elder <elder@riscstar.com>
+  - Daniel Thompson <daniel@riscstar.com>
+
+description: |
+  The Toshiba TC9564 is an SoC accessed by a host system through the
+  upstream PCIe port on the PCIe switch it implements.  The switch includes
+  an embedded PCIe endpoint on one of its downstream ports that provides
+  access to various SoC peripherals (including a clock and reset controller)
+  via one of its BARs.  A system controller provides managed access to the
+  first two pages of this memory region to ensure accesses made by these
+  peripherals produce well-defined results.
+
+properties:
+  compatible:
+    items:
+      - const: toshiba,tc9564-config
+      - const: syscon
+      - const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  ranges: true
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    syscon@0 {
+        compatible = "toshiba,tc9564-config",
+                     "syscon",
+                     "simple-mfd";
+        reg = <0x0 0x2000>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index cf846853fdc79..b2d3257b8f892 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -27674,6 +27674,7 @@ TOSHIBA TC9564 PCI DRIVER
 M:	Alex Elder <elder@kernel.org>
 M:	Daniel Thompson <danielt@kernel.org>
 S:	Maintained
+F:	Documentation/devicetree/bindings/mfd/toshiba,tc9564.yaml
 F:	Documentation/devicetree/bindings/misc/pci1179,0220.yaml
 F:	drivers/misc/tc9564-pci.c
 
-- 
2.53.0