dt-bindings: soc: ti: Convert ti,sci-pm-domain to json schema

Convert the ti,sci-pm-domain to json schema for better checks and
documentation.

Differences being:
 - Drop consumer example as they are documented in the corresponding
   bindings themselves.
 - Drop phandle description for reset consumer or cell definition as it
   is redundant.

Signed-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Tero Kristo <kristo@kernel.org>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://lore.kernel.org/r/20210426155457.21221-4-nm@ti.com
Signed-off-by: Rob Herring <robh@kernel.org>

diff --git a/Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt b/Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
deleted file mode 100644 (file)
index 6217e64..0000000
--- a/Documentation/devicetree/bindings/soc/ti/sci-pm-domain.txt
+++ /dev/null
@@ -1,65 +0,0 @@
-Texas Instruments TI-SCI Generic Power Domain
----------------------------------------------
-
-Some TI SoCs contain a system controller (like the PMMC, etc...) that is
-responsible for controlling the state of the IPs that are present.
-Communication between the host processor running an OS and the system
-controller happens through a protocol known as TI-SCI [1].
-
-[1] Documentation/devicetree/bindings/arm/keystone/ti,sci.txt
-
-PM Domain Node
-==============
-The PM domain node represents the global PM domain managed by the PMMC, which
-in this case is the implementation as documented by the generic PM domain
-bindings in Documentation/devicetree/bindings/power/power-domain.yaml.  Because
-this relies on the TI SCI protocol to communicate with the PMMC it must be a
-child of the pmmc node.
-
-Required Properties:
---------------------
-- compatible: should be "ti,sci-pm-domain"
-- #power-domain-cells: Can be one of the following:
-                       1: Containing the device id of each node
-                       2: First entry should be device id
-                          Second entry should be one of the floowing:
-                          TI_SCI_PD_EXCLUSIVE: To allow device to be
-                                               exclusively controlled by
-                                               the requesting hosts.
-                          TI_SCI_PD_SHARED: To allow device to be shared
-                                            by multiple hosts.
-
-Example (K2G):
--------------
-       pmmc: pmmc {
-               compatible = "ti,k2g-sci";
-               ...
-
-               k2g_pds: power-controller {
-                       compatible = "ti,sci-pm-domain";
-                       #power-domain-cells = <1>;
-               };
-       };
-
-PM Domain Consumers
-===================
-Hardware blocks belonging to a PM domain should contain a "power-domains"
-property that is a phandle pointing to the corresponding PM domain node
-along with an index representing the device id to be passed to the PMMC
-for device control.
-
-Required Properties:
---------------------
-- power-domains: phandle pointing to the corresponding PM domain node
-                and an ID representing the device.
-
-See http://processors.wiki.ti.com/index.php/TISCI#66AK2G02_Data for the list
-of valid identifiers for k2g.
-
-Example (K2G):
---------------------
-       uart0: serial@2530c00 {
-               compatible = "ns16550a";
-               ...
-               power-domains = <&k2g_pds 0x002c>;
-       };

diff --git a/Documentation/devicetree/bindings/soc/ti/sci-pm-domain.yaml b/Documentation/devicetree/bindings/soc/ti/sci-pm-domain.yaml
new file mode 100644 (file)
index 0000000..9e6cb4e
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/ti/sci-pm-domain.yaml
@@ -0,0 +1,59 @@
+# SPDX-License-Identifier: (GPL-2.0-only or BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/ti/sci-pm-domain.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI-SCI generic power domain node bindings
+
+maintainers:
+  - Nishanth Menon <nm@ti.com>
+
+allOf:
+  - $ref: /schemas/power/power-domain.yaml#
+
+description: |
+  Some TI SoCs contain a system controller (like the Power Management Micro
+  Controller (PMMC) on Keystone 66AK2G SoC) that are responsible for controlling
+  the state of the various hardware modules present on the SoC. Communication
+  between the host processor running an OS and the system controller happens
+  through a protocol called TI System Control Interface (TI-SCI protocol).
+
+  This PM domain node represents the global PM domain managed by the TI-SCI
+  controller. Since this relies on the TI SCI protocol to communicate with
+  the TI-SCI controller, it must be a child of the TI-SCI controller node.
+
+properties:
+  compatible:
+    const: ti,sci-pm-domain
+
+  "#power-domain-cells":
+    enum: [1, 2]
+    description:
+      The two cells represent values that the TI-SCI controller defines.
+
+      The first cell should contain the device ID.
+
+      The second cell, if cell-value is 2, should be one of the following
+      TI_SCI_PD_EXCLUSIVE - Allows the device to be exclusively controlled
+      or
+      TI_SCI_PD_SHARED - Allows the device to be shared by multiple hosts.
+      Please refer to dt-bindings/soc/ti,sci_pm_domain.h for the definitions.
+
+      Please see  http://processors.wiki.ti.com/index.php/TISCI for
+      protocol documentation for the values to be used for different devices.
+
+additionalProperties: false
+
+examples:
+  - |
+    k2g_pds: power-controller {
+        compatible = "ti,sci-pm-domain";
+        #power-domain-cells = <1>;
+    };
+
+  - |
+    k3_pds: power-controller {
+        compatible = "ti,sci-pm-domain";
+        #power-domain-cells = <2>;
+    };