[PATCH V4 1/2] dt-bindings: opp: Convert ti-omap5-opp-supply to json schema

From: Nishanth Menon
Date: Thu Aug 10 2023 - 23:15:27 EST

Rename ti-omap5-opp-supply to be bit more generic omap-opp-supply and
convert the free text binding to json-schema.

Signed-off-by: Nishanth Menon <nm@xxxxxx>
---
Changes since V3:
* Rewrote the description of the binding to something more relevant to
current style of documentation.

V3: https://lore.kernel.org/all/20230809023045.1870410-2-nm@xxxxxx/
V2: https://lore.kernel.org/all/20230801233341.1416552-2-nm@xxxxxx/
V1: https://lore.kernel.org/all/20230724153911.1376830-5-nm@xxxxxx/

.../bindings/opp/ti,omap-opp-supply.yaml | 106 ++++++++++++++++++
.../bindings/opp/ti-omap5-opp-supply.txt | 63 -----------
2 files changed, 106 insertions(+), 63 deletions(-)
create mode 100644 Documentation/devicetree/bindings/opp/ti,omap-opp-supply.yaml
delete mode 100644 Documentation/devicetree/bindings/opp/ti-omap5-opp-supply.txt

diff --git a/Documentation/devicetree/bindings/opp/ti,omap-opp-supply.yaml b/Documentation/devicetree/bindings/opp/ti,omap-opp-supply.yaml
new file mode 100644
index 000000000000..25a0cb5ec6ff
--- /dev/null
+++ b/Documentation/devicetree/bindings/opp/ti,omap-opp-supply.yaml
@@ -0,0 +1,106 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/opp/ti,omap-opp-supply.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Texas Instruments OMAP compatible OPP supply
+
+description:
+ OMAP5, DRA7, and AM57 families of SoCs have Class 0 AVS eFuse
+ registers, which contain OPP-specific voltage information tailored
+ for the specific device. This binding provides the information
+ needed to describe such a hardware values and relate them to program
+ the primary regulator during an OPP transition.
+
+ Also, some supplies may have an associated vbb-supply, an Adaptive
+ Body Bias regulator, which must transition in a specific sequence
+ w.r.t the vdd-supply and clk when making an OPP transition. By
+ supplying two regulators to the device that will undergo OPP
+ transitions, we can use the multi-regulator support implemented by
+ the OPP core to describe both regulators the platform needs. The
+ OPP core binding Documentation/devicetree/bindings/opp/opp-v2.yaml
+ provides further information (refer to Example 4 Handling multiple
+ regulators).
+
+maintainers:
+ - Nishanth Menon <nm@xxxxxx>
+
+properties:
+ $nodename:
+ pattern: '^opp-supply(@[0-9a-f]+)?$'
+
+ compatible:
+ oneOf:
+ - description: Basic OPP supply controlling VDD and VBB
+ items:
+ - const: ti,omap-opp-supply
+ - description: OMAP5+ optimized voltages in efuse(Class 0) VDD along with
+ VBB.
+ items:
+ - const: ti,omap5-opp-supply
+ - description: OMAP5+ optimized voltages in efuse(class0) VDD but no VBB
+ items:
+ - const: ti,omap5-core-opp-supply
+
+ reg:
+ maxItems: 1
+
+ ti,absolute-max-voltage-uv:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: Absolute maximum voltage for the OPP supply in micro-volts.
+ minimum: 750000
+ maximum: 1500000
+
+ ti,efuse-settings:
+ description: An array of u32 tuple items providing information about
+ optimized efuse configuration.
+ minItems: 1
+ $ref: /schemas/types.yaml#/definitions/uint32-matrix
+ items:
+ items:
+ -
+ description: Reference voltage in micro-volts (OPP Voltage)
+ minimum: 750000
+ maximum: 1500000
+ multipleOf: 10000
+ -
+ description: efuse offset where the optimized voltage is located
+ multipleOf: 4
+ maximum: 256
+
+required:
+ - compatible
+ - ti,absolute-max-voltage-uv
+
+allOf:
+ - if:
+ not:
+ properties:
+ compatible:
+ contains:
+ const: ti,omap-opp-supply
+ then:
+ required:
+ - reg
+ - ti,efuse-settings
+
+additionalProperties: false
+
+examples:
+ - |
+ opp-supply {
+ compatible = "ti,omap-opp-supply";
+ ti,absolute-max-voltage-uv = <1375000>;
+ };
+ - |
+ opp-supply@4a003b20 {
+ compatible = "ti,omap5-opp-supply";
+ reg = <0x4a003b20 0x8>;
+ ti,efuse-settings =
+ /* uV offset */
+ <1060000 0x0>,
+ <1160000 0x4>,
+ <1210000 0x8>;
+ ti,absolute-max-voltage-uv = <1500000>;
+ };
diff --git a/Documentation/devicetree/bindings/opp/ti-omap5-opp-supply.txt b/Documentation/devicetree/bindings/opp/ti-omap5-opp-supply.txt
deleted file mode 100644
index b70d326117cd..000000000000
--- a/Documentation/devicetree/bindings/opp/ti-omap5-opp-supply.txt
+++ /dev/null
@@ -1,63 +0,0 @@
-Texas Instruments OMAP compatible OPP supply description
-
-OMAP5, DRA7, and AM57 family of SoCs have Class0 AVS eFuse registers which
-contain data that can be used to adjust voltages programmed for some of their
-supplies for more efficient operation. This binding provides the information
-needed to read these values and use them to program the main regulator during
-an OPP transitions.
-
-Also, some supplies may have an associated vbb-supply which is an Adaptive Body
-Bias regulator which much be transitioned in a specific sequence with regards
-to the vdd-supply and clk when making an OPP transition. By supplying two
-regulators to the device that will undergo OPP transitions we can make use
-of the multi regulator binding that is part of the OPP core described here [1]
-to describe both regulators needed by the platform.
-
-[1] Documentation/devicetree/bindings/opp/opp-v2.yaml
-
-Required Properties for Device Node:
-- vdd-supply: phandle to regulator controlling VDD supply
-- vbb-supply: phandle to regulator controlling Body Bias supply
- (Usually Adaptive Body Bias regulator)
-
-Required Properties for opp-supply node:
-- compatible: Should be one of:
- "ti,omap-opp-supply" - basic OPP supply controlling VDD and VBB
- "ti,omap5-opp-supply" - OMAP5+ optimized voltages in efuse(class0)VDD
- along with VBB
- "ti,omap5-core-opp-supply" - OMAP5+ optimized voltages in efuse(class0) VDD
- but no VBB.
-- reg: Address and length of the efuse register set for the device (mandatory
- only for "ti,omap5-opp-supply")
-- ti,efuse-settings: An array of u32 tuple items providing information about
- optimized efuse configuration. Each item consists of the following:
- volt: voltage in uV - reference voltage (OPP voltage)
- efuse_offseet: efuse offset from reg where the optimized voltage is stored.
-- ti,absolute-max-voltage-uv: absolute maximum voltage for the OPP supply.
-
-Example:
-
-/* Device Node (CPU) */
-cpus {
- cpu0: cpu@0 {
- device_type = "cpu";
-
- ...
-
- vdd-supply = <&vcc>;
- vbb-supply = <&abb_mpu>;
- };
-};
-
-/* OMAP OPP Supply with Class0 registers */
-opp_supply_mpu: opp_supply@4a003b20 {
- compatible = "ti,omap5-opp-supply";
- reg = <0x4a003b20 0x8>;
- ti,efuse-settings = <
- /* uV offset */
- 1060000 0x0
- 1160000 0x4
- 1210000 0x8
- >;
- ti,absolute-max-voltage-uv = <1500000>;
-};
--
2.40.0