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Message-ID: <20240930210424.1994047-1-heiko@sntech.de>
Date: Mon, 30 Sep 2024 23:04:24 +0200
From: Heiko Stuebner <heiko@...ech.de>
To: lgirdwood@...il.com,
broonie@...nel.org
Cc: robh@...nel.org,
krzk+dt@...nel.org,
conor+dt@...nel.org,
linux-kernel@...r.kernel.org,
devicetree@...r.kernel.org,
Heiko Stuebner <heiko@...ech.de>
Subject: [PATCH] dt-bindings: regulator: vctrl-regulator: convert to YAML
Convert the vctrl-regulator bindings to DT schema.
This resolves a dtbs check warning for the rk3399-gru devices.
Signed-off-by: Heiko Stuebner <heiko@...ech.de>
---
.../bindings/regulator/vctrl-regulator.yaml | 80 +++++++++++++++++++
.../devicetree/bindings/regulator/vctrl.txt | 49 ------------
2 files changed, 80 insertions(+), 49 deletions(-)
create mode 100644 Documentation/devicetree/bindings/regulator/vctrl-regulator.yaml
delete mode 100644 Documentation/devicetree/bindings/regulator/vctrl.txt
diff --git a/Documentation/devicetree/bindings/regulator/vctrl-regulator.yaml b/Documentation/devicetree/bindings/regulator/vctrl-regulator.yaml
new file mode 100644
index 000000000000..2311f79990a1
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/vctrl-regulator.yaml
@@ -0,0 +1,80 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/vctrl-regulator.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Voltage controlled regulators
+
+maintainers:
+ - Heiko Stuebner <heiko@...ech.de>
+
+allOf:
+ - $ref: regulator.yaml#
+
+properties:
+ compatible:
+ const: vctrl-regulator
+
+ ctrl-supply:
+ description: Regulator supplying the control voltage
+
+ ctrl-voltage-range:
+ description:
+ Array of two integer values describing the range (min/max) of the
+ control voltage. The values specify the control voltage needed to
+ generate the corresponding regulator-min/max-microvolt output
+ voltage.
+ minItems: 2
+ maxItems: 2
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+
+ min-slew-down-rate:
+ description:
+ Describes how slowly the regulator voltage will decay down in the
+ worst case (lightest expected load). Specified in uV / us (like
+ main regulator ramp rate). This value is required when
+ ovp-threshold-percent is specified.
+ $ref: /schemas/types.yaml#/definitions/uint32
+
+ ovp-threshold-percent:
+ description:
+ Overvoltage protection (OVP) threshold of the regulator in percent.
+ Some regulators have an OVP circuitry which shuts down the regulator
+ when the actual output voltage deviates beyond a certain margin from
+ the expected value for a given control voltage. On larger voltage
+ decreases this can occur undesiredly since the output voltage does
+ not adjust immediately to changes in the control voltage. To avoid
+ this situation the vctrl driver breaks down larger voltage decreases
+ into multiple steps, where each step is within the OVP threshold.
+ minimum: 0
+ maximum: 100
+
+unevaluatedProperties: false
+
+dependencies:
+ ovp-threshold-percent: [ min-slew-down-rate ]
+
+required:
+ - compatible
+ - ctrl-supply
+ - ctrl-voltage-range
+ - regulator-min-microvolt
+ - regulator-max-microvolt
+
+examples:
+ - |
+ vctrl-reg {
+ compatible = "vctrl-regulator";
+ regulator-name = "vctrl_reg";
+
+ ctrl-supply = <&ctrl_reg>;
+ ctrl-voltage-range = <200000 500000>;
+
+ min-slew-down-rate = <225>;
+ ovp-threshold-percent = <16>;
+
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1500000>;
+ };
+...
diff --git a/Documentation/devicetree/bindings/regulator/vctrl.txt b/Documentation/devicetree/bindings/regulator/vctrl.txt
deleted file mode 100644
index e940377cfd69..000000000000
--- a/Documentation/devicetree/bindings/regulator/vctrl.txt
+++ /dev/null
@@ -1,49 +0,0 @@
-Bindings for Voltage controlled regulators
-==========================================
-
-Required properties:
---------------------
-- compatible : must be "vctrl-regulator".
-- regulator-min-microvolt : smallest voltage consumers may set
-- regulator-max-microvolt : largest voltage consumers may set
-- ctrl-supply : The regulator supplying the control voltage.
-- ctrl-voltage-range : an array of two integer values describing the range
- (min/max) of the control voltage. The values specify
- the control voltage needed to generate the corresponding
- regulator-min/max-microvolt output voltage.
-
-Optional properties:
---------------------
-- ovp-threshold-percent : overvoltage protection (OVP) threshold of the
- regulator in percent. Some regulators have an OVP
- circuitry which shuts down the regulator when the
- actual output voltage deviates beyond a certain
- margin from the expected value for a given control
- voltage. On larger voltage decreases this can occur
- undesiredly since the output voltage does not adjust
- immediately to changes in the control voltage. To
- avoid this situation the vctrl driver breaks down
- larger voltage decreases into multiple steps, where
- each step is within the OVP threshold.
-- min-slew-down-rate : Describes how slowly the regulator voltage will decay
- down in the worst case (lightest expected load).
- Specified in uV / us (like main regulator ramp rate).
- This value is required when ovp-threshold-percent is
- specified.
-
-Example:
-
- vctrl-reg {
- compatible = "vctrl-regulator";
- regulator-name = "vctrl_reg";
-
- ctrl-supply = <&ctrl_reg>;
-
- regulator-min-microvolt = <800000>;
- regulator-max-microvolt = <1500000>;
-
- ctrl-voltage-range = <200000 500000>;
-
- min-slew-down-rate = <225>;
- ovp-threshold-percent = <16>;
- };
--
2.43.0
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