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Message-Id: <20211008114755.148279-1-krzysztof.kozlowski@canonical.com>
Date: Fri, 8 Oct 2021 13:47:55 +0200
From: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
To: Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>,
linux-kernel@...r.kernel.org, devicetree@...r.kernel.org
Cc: Rob Herring <robh@...nel.org>
Subject: [PATCH v2] regulator: dt-bindings: maxim,max8973: convert to dtschema
Convert the Maxim MAX8973 regulator to DT schema format. Extend the
examples with more advanced one for MAX77621 copied from kernel's
nvidia/tegra210-smaug.dts, licensed under GPL-2.0.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
Reviewed-by: Rob Herring <robh@...nel.org>
---
Changes since v1:
1. Drop unneeded ref from milicelsius field.
2. Add Rob's tag.
---
.../bindings/regulator/max8973-regulator.txt | 52 -------
.../bindings/regulator/maxim,max8973.yaml | 139 ++++++++++++++++++
2 files changed, 139 insertions(+), 52 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/regulator/max8973-regulator.txt
create mode 100644 Documentation/devicetree/bindings/regulator/maxim,max8973.yaml
diff --git a/Documentation/devicetree/bindings/regulator/max8973-regulator.txt b/Documentation/devicetree/bindings/regulator/max8973-regulator.txt
deleted file mode 100644
index c2c68fcc1b41..000000000000
--- a/Documentation/devicetree/bindings/regulator/max8973-regulator.txt
+++ /dev/null
@@ -1,52 +0,0 @@
-* Maxim MAX8973 Voltage Regulator
-
-Required properties:
-
-- compatible: must be one of following:
- "maxim,max8973"
- "maxim,max77621".
-- reg: the i2c slave address of the regulator. It should be 0x1b.
-
-Any standard regulator properties can be used to configure the single max8973
-DCDC.
-
-Optional properties:
-
--maxim,externally-enable: boolean, externally control the regulator output
- enable/disable.
--maxim,enable-gpio: GPIO for enable control. If the valid GPIO is provided
- then externally enable control will be considered.
--maxim,dvs-gpio: GPIO which is connected to DVS pin of device.
--maxim,dvs-default-state: Default state of GPIO during initialisation.
- 1 for HIGH and 0 for LOW.
--maxim,enable-remote-sense: boolean, enable reote sense.
--maxim,enable-falling-slew-rate: boolean, enable falling slew rate.
--maxim,enable-active-discharge: boolean: enable active discharge.
--maxim,enable-frequency-shift: boolean, enable 9% frequency shift.
--maxim,enable-bias-control: boolean, enable bias control. By enabling this
- startup delay can be reduce to 20us from 220us.
--maxim,enable-etr: boolean, enable Enhanced Transient Response.
--maxim,enable-high-etr-sensitivity: boolean, Enhanced transient response
- circuit is enabled and set for high sensitivity. If this
- property is available then etr will be enable default.
-
-Enhanced transient response (ETR) will affect the configuration of CKADV.
-
--junction-warn-millicelsius: u32, junction warning temperature threshold
- in millicelsius. If die temperature crosses this level then
- device generates the warning interrupts.
-
-Please note that thermal functionality is only supported on MAX77621. The
-supported threshold warning temperature for MAX77621 are 120 degC and 140 degC.
-
-Example:
-
- max8973@1b {
- compatible = "maxim,max8973";
- reg = <0x1b>;
-
- regulator-min-microvolt = <935000>;
- regulator-max-microvolt = <1200000>;
- regulator-boot-on;
- regulator-always-on;
- };
diff --git a/Documentation/devicetree/bindings/regulator/maxim,max8973.yaml b/Documentation/devicetree/bindings/regulator/maxim,max8973.yaml
new file mode 100644
index 000000000000..54522827265b
--- /dev/null
+++ b/Documentation/devicetree/bindings/regulator/maxim,max8973.yaml
@@ -0,0 +1,139 @@
+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/regulator/maxim,max8973.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Maxim MAX8973/MAX77621 voltage regulator
+
+maintainers:
+ - Krzysztof Kozlowski <krzysztof.kozlowski@...onical.com>
+
+allOf:
+ - $ref: regulator.yaml#
+
+properties:
+ compatible:
+ enum:
+ - maxim,max8973
+ - maxim,max77621
+
+ junction-warn-millicelsius:
+ description: |
+ Junction warning temperature threshold in millicelsius. If die
+ temperature crosses this level then device generates the warning
+ interrupts.
+ Please note that thermal functionality is only supported on MAX77621. The
+ supported threshold warning temperature for MAX77621 are 120 degC and 140
+ degC.
+
+ maxim,dvs-gpio:
+ maxItems: 1
+ description: |
+ GPIO which is connected to DVS pin of device.
+
+ maxim,dvs-default-state:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ enum: [0, 1]
+ description: |
+ Default state of GPIO during initialisation.
+ 1 for HIGH and 0 for LOW.
+
+ maxim,externally-enable:
+ type: boolean
+ description: |
+ Externally control the regulator output enable/disable.
+
+ maxim,enable-gpio:
+ maxItems: 1
+ description: |
+ GPIO for enable control. If the valid GPIO is provided then externally
+ enable control will be considered.
+
+ maxim,enable-remote-sense:
+ type: boolean
+ description: Enable remote sense.
+
+ maxim,enable-falling-slew-rate:
+ type: boolean
+ description: Enable falling slew rate.
+
+ maxim,enable-active-discharge:
+ type: boolean
+ description: Eable active discharge.
+
+ maxim,enable-frequency-shift:
+ type: boolean
+ description: Enable 9% frequency shift.
+
+ maxim,enable-bias-control:
+ type: boolean
+ description: |
+ Enable bias control which can reduce the startup delay to 20us from 220us.
+
+ maxim,enable-etr:
+ type: boolean
+ description: Enable Enhanced Transient Response.
+
+ maxim,enable-high-etr-sensitivity:
+ type: boolean
+ description: |
+ Enhanced transient response circuit is enabled and set for high
+ sensitivity. If this property is available then etr will be enable
+ default.
+ Enhanced transient response (ETR) will affect the configuration of CKADV.
+
+ reg:
+ maxItems: 1
+
+required:
+ - compatible
+ - reg
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ regulator@1b {
+ compatible = "maxim,max8973";
+ reg = <0x1b>;
+
+ regulator-min-microvolt = <935000>;
+ regulator-max-microvolt = <1200000>;
+ regulator-boot-on;
+ regulator-always-on;
+ };
+ };
+
+ - |
+ #include <dt-bindings/gpio/tegra-gpio.h>
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ regulator@1b {
+ compatible = "maxim,max77621";
+ reg = <0x1b>;
+ interrupt-parent = <&gpio>;
+ interrupts = <TEGRA_GPIO(Y, 1) IRQ_TYPE_LEVEL_LOW>;
+
+ regulator-always-on;
+ regulator-boot-on;
+ regulator-min-microvolt = <800000>;
+ regulator-max-microvolt = <1231250>;
+ regulator-name = "PPVAR_CPU";
+ regulator-ramp-delay = <12500>;
+ maxim,dvs-default-state = <1>;
+ maxim,enable-active-discharge;
+ maxim,enable-bias-control;
+ maxim,enable-etr;
+ maxim,enable-gpio = <&pmic 5 GPIO_ACTIVE_HIGH>;
+ maxim,externally-enable;
+ };
+ };
--
2.30.2
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