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Subject[PATCH 2/3] dt-bindings: regulator: Convert gpio-regulator to json-schema
Date
Convert the gpio-regulator binding to DT schema format using
json-schema.

Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Rob Herring <robh@kernel.org>
---
.../bindings/regulator/gpio-regulator.txt | 57 ---------
.../bindings/regulator/gpio-regulator.yaml | 118 ++++++++++++++++++
2 files changed, 118 insertions(+), 57 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/regulator/gpio-regulator.txt
create mode 100644 Documentation/devicetree/bindings/regulator/gpio-regulator.yaml

diff --git a/Documentation/devicetree/bindings/regulator/gpio-regulator.txt b/Documentation/devicetree/bindings/regulator/gpio-regulator.txt
deleted file mode 100644
index dd25e73b5d79..000000000000
--- a/Documentation/devicetree/bindings/regulator/gpio-regulator.txt
+++ /dev/null
@@ -1,57 +0,0 @@
-GPIO controlled regulators
-
-Required properties:
-- compatible : Must be "regulator-gpio".
-- regulator-name : Defined in regulator.txt as optional, but required
- here.
-- gpios : Array of one or more GPIO pins used to select the
- regulator voltage/current listed in "states".
-- states : Selection of available voltages/currents provided by
- this regulator and matching GPIO configurations to
- achieve them. If there are no states in the "states"
- array, use a fixed regulator instead.
-
-Optional properties:
-- enable-gpios : GPIO used to enable/disable the regulator.
- Warning, the GPIO phandle flags are ignored and the
- GPIO polarity is controlled solely by the presence
- of "enable-active-high" DT property. This is due to
- compatibility with old DTs.
-- enable-active-high : Polarity of "enable-gpio" GPIO is active HIGH.
- Default is active LOW.
-- gpios-states : On operating systems, that don't support reading back
- gpio values in output mode (most notably linux), this
- array provides the state of GPIO pins set when
- requesting them from the gpio controller. Systems,
- that are capable of preserving state when requesting
- the lines, are free to ignore this property.
- 0: LOW, 1: HIGH. Default is LOW if nothing else
- is specified.
-- startup-delay-us : Startup time in microseconds.
-- regulator-type : Specifies what is being regulated, must be either
- "voltage" or "current", defaults to voltage.
-
-Any property defined as part of the core regulator binding defined in
-regulator.txt can also be used.
-
-Example:
-
- mmciv: gpio-regulator {
- compatible = "regulator-gpio";
-
- regulator-name = "mmci-gpio-supply";
- regulator-min-microvolt = <1800000>;
- regulator-max-microvolt = <2600000>;
- regulator-boot-on;
-
- enable-gpios = <&gpio0 23 0x4>;
- gpios = <&gpio0 24 0x4
- &gpio0 25 0x4>;
- states = <1800000 0x3
- 2200000 0x2
- 2600000 0x1
- 2900000 0x0>;
-
- startup-delay-us = <100000>;
- enable-active-high;
- };
diff --git a/Documentation/devicetree/bindings/regulator/gpio-regulator.yaml b/Documentation/devicetree/bindings/regulator/gpio-regulator.yaml
new file mode 100644
index 000000000000..9d3b28417fb6
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/gpio-regulator.yaml
@@ -0,0 +1,118 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/gpio-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: GPIO controlled regulators
+
+maintainers:
+ - Liam Girdwood <lgirdwood@gmail.com>
+ - Mark Brown <broonie@kernel.org>
+
+description:
+ Any property defined as part of the core regulator binding, defined in
+ regulator.txt, can also be used.
+
+allOf:
+ - $ref: "regulator.yaml#"
+
+properties:
+ compatible:
+ const: regulator-gpio
+
+ regulator-name: true
+
+ enable-gpios:
+ description: GPIO to use to enable/disable the regulator.
+ Warning, the GPIO phandle flags are ignored and the GPIO polarity is
+ controlled solely by the presence of "enable-active-high" DT property.
+ This is due to compatibility with old DTs.
+ maxItems: 1
+
+ gpios:
+ description: Array of one or more GPIO pins used to select the regulator
+ voltage/current listed in "states".
+ minItems: 1
+ maxItems: 8 # Should be enough...
+
+ gpios-states:
+ description: |
+ On operating systems, that don't support reading back gpio values in
+ output mode (most notably linux), this array provides the state of GPIO
+ pins set when requesting them from the gpio controller. Systems, that are
+ capable of preserving state when requesting the lines, are free to ignore
+ this property.
+ 0: LOW
+ 1: HIGH
+ Default is LOW if nothing else is specified.
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32-array
+ - maxItems: 8
+ items:
+ enum: [ 0, 1 ]
+ default: 0
+
+ states:
+ description: Selection of available voltages/currents provided by this
+ regulator and matching GPIO configurations to achieve them. If there are
+ no states in the "states" array, use a fixed regulator instead.
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/uint32-matrix
+ - maxItems: 8
+ items:
+ items:
+ - description: Voltage in microvolts
+ - description: GPIO group state value
+
+ startup-delay-us:
+ description: startup time in microseconds
+
+ enable-active-high:
+ description: Polarity of "enable-gpio" GPIO is active HIGH. Default is
+ active LOW.
+ type: boolean
+
+ gpio-open-drain:
+ description:
+ GPIO is open drain type. If this property is missing then default
+ assumption is false.
+ type: boolean
+
+ regulator-type:
+ description: Specifies what is being regulated.
+ allOf:
+ - $ref: /schemas/types.yaml#/definitions/string
+ - enum:
+ - voltage
+ - current
+ default: voltage
+
+required:
+ - compatible
+ - regulator-name
+ - gpios
+ - states
+
+examples:
+ - |
+ gpio-regulator {
+ compatible = "regulator-gpio";
+
+ regulator-name = "mmci-gpio-supply";
+ regulator-min-microvolt = <1800000>;
+ regulator-max-microvolt = <2600000>;
+ regulator-boot-on;
+
+ enable-gpios = <&gpio0 23 0x4>;
+ gpios = <&gpio0 24 0x4
+ &gpio0 25 0x4>;
+ states = <1800000 0x3>,
+ <2200000 0x2>,
+ <2600000 0x1>,
+ <2900000 0x0>;
+
+ startup-delay-us = <100000>;
+ enable-active-high;
+ };
+...
--
2.20.1
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