From d7181a2d43cffb19f1e5c19f6d2328f190c87d70 Mon Sep 17 00:00:00 2001 From: Martijn de Gouw Date: Sun, 25 May 2025 09:18:20 +0200 Subject: [PATCH] dt-bindings: regulator: add pca9450: Add regulator-allowed-modes 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 Acked-by: Conor Dooley Link: https://patch.msgid.link/20250525071823.819342-1-martijn.de.gouw@prodrive-technologies.com Signed-off-by: Mark Brown --- .../regulator/nxp,pca9450-regulator.yaml | 14 ++++++++++++++ .../regulator/nxp,pca9450-regulator.h | 18 ++++++++++++++++++ 2 files changed, 32 insertions(+) create mode 100644 include/dt-bindings/regulator/nxp,pca9450-regulator.h diff --git a/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml b/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml index 4ffe5c3faea07..a5486c36830f0 100644 --- a/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml +++ b/Documentation/devicetree/bindings/regulator/nxp,pca9450-regulator.yaml @@ -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 + #include i2c { #address-cells = <1>; @@ -179,6 +189,8 @@ examples: regulator-max-microvolt = <3400000>; regulator-boot-on; regulator-always-on; + regulator-initial-mode = ; + regulator-allowed-modes = ; }; buck5: BUCK5 { regulator-name = "BUCK5"; @@ -186,6 +198,8 @@ examples: regulator-max-microvolt = <3400000>; regulator-boot-on; regulator-always-on; + regulator-allowed-modes = ; }; buck6: BUCK6 { regulator-name = "BUCK6"; diff --git a/include/dt-bindings/regulator/nxp,pca9450-regulator.h b/include/dt-bindings/regulator/nxp,pca9450-regulator.h new file mode 100644 index 0000000000000..08434caef429f --- /dev/null +++ b/include/dt-bindings/regulator/nxp,pca9450-regulator.h @@ -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 -- 2.51.0