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dt-bindings: regulator: add pca9450: Add regulator-allowed-modes

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Make the PWM mode on the buck controllers configurable from devicetree.
Some boards require forced PWM mode to keep the supply ripple within
acceptable limits under light load conditions.

Signed-off-by: Martijn de Gouw <martijn.de.gouw@prodrive-technologies.com>
Acked-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20250525071823.819342-1-martijn.de.gouw@prodrive-technologies.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Martijn de Gouw
2025-05-25 09:18:20 +02:00
committed by Mark Brown
parent 9bb3c7df54
commit d7181a2d43
2 changed files with 32 additions and 0 deletions
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14
Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml
View File

@@ -100,6 +100,15 @@ properties:
PMIC default "STANDBY" state voltage in uV. Only Buck1~3 have such
dvs(dynamic voltage scaling) property.
regulator-allowed-modes:
description: |
Buck regulator operating modes allowed. Valid values below.
Users should use the macros from dt-bindings/regulator/nxp,pca9450-regulator.h
0 (PCA9450_BUCK_MODE_AUTO): Auto PFM/PWM mode
1 (PCA9450_BUCK_MODE_FORCE_PWM): Forced PWM mode
items:
enum: [ 0, 1 ]
unevaluatedProperties: false
additionalProperties: false
@@ -143,6 +152,7 @@ allOf:
examples:
- |
#include <dt-bindings/interrupt-controller/irq.h>
#include <dt-bindings/regulator/nxp,pca9450-regulator.h>
i2c {
#address-cells = <1>;
@@ -179,6 +189,8 @@ examples:
regulator-max-microvolt = <3400000>;
regulator-boot-on;
regulator-always-on;
regulator-initial-mode = <PCA9450_BUCK_MODE_FORCE_PWM>;
regulator-allowed-modes = <PCA9450_BUCK_MODE_FORCE_PWM>;
};
buck5: BUCK5 {
regulator-name = "BUCK5";
@@ -186,6 +198,8 @@ examples:
regulator-max-microvolt = <3400000>;
regulator-boot-on;
regulator-always-on;
regulator-allowed-modes = <PCA9450_BUCK_MODE_AUTO
PCA9450_BUCK_MODE_FORCE_PWM>;
};
buck6: BUCK6 {
regulator-name = "BUCK6";

18
include/dt-bindings/regulator/nxp,pca9450-regulator.h Normal file
View File

@@ -0,0 +1,18 @@
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
/*
* Device Tree binding constants for the NXP PCA9450A/B/C PMIC regulators
*/
#ifndef _DT_BINDINGS_REGULATORS_NXP_PCA9450_H
#define _DT_BINDINGS_REGULATORS_NXP_PCA9450_H
/*
* Buck mode constants which may be used in devicetree properties (eg.
* regulator-initial-mode, regulator-allowed-modes).
* See the manufacturer's datasheet for more information on these modes.
*/
#define PCA9450_BUCK_MODE_AUTO 0
#define PCA9450_BUCK_MODE_FORCE_PWM 1
#endif