0001 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
0002 %YAML 1.2
0003 ---
0004 $id: http://devicetree.org/schemas/mfd/rohm,bd71837-pmic.yaml#
0005 $schema: http://devicetree.org/meta-schemas/core.yaml#
0006
0007 title: ROHM BD71837 Power Management Integrated Circuit bindings
0008
0009 maintainers:
0010 - Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
0011
0012 description: |
0013 BD71837MWV is programmable Power Management ICs for powering single-core,
0014 dual-core, and quad-core SoCs such as NXP-i.MX 8M. It is optimized for low
0015 BOM cost and compact solution footprint. BD71837MWV integrates 8 Buck
0016 regulators and 7 LDOs.
0017 Datasheet for BD71837 is available at
0018 https://www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applications/nxp-imx/bd71837amwv-product
0019
0020 properties:
0021 compatible:
0022 const: rohm,bd71837
0023
0024 reg:
0025 description:
0026 I2C slave address.
0027 maxItems: 1
0028
0029 interrupts:
0030 maxItems: 1
0031
0032 clocks:
0033 maxItems: 1
0034
0035 clock-names:
0036 const: osc
0037
0038 "#clock-cells":
0039 const: 0
0040
0041 clock-output-names:
0042 const: pmic_clk
0043
0044 # The BD718x7 supports two different HW states as reset target states. States
0045 # are called as SNVS and READY. At READY state all the PMIC power outputs go
0046 # down and OTP is reload. At the SNVS state all other logic and external
0047 # devices apart from the SNVS power domain are shut off. Please refer to NXP
0048 # i.MX8 documentation for further information regarding SNVS state. When a
0049 # reset is done via SNVS state the PMIC OTP data is not reload. This causes
0050 # power outputs that have been under SW control to stay down when reset has
0051 # switched power state to SNVS. If reset is done via READY state the power
0052 # outputs will be returned to HW control by OTP loading. Thus the reset
0053 # target state is set to READY by default. If SNVS state is used the boot
0054 # crucial regulators must have the regulator-always-on and regulator-boot-on
0055 # properties set in regulator node.
0056
0057 rohm,reset-snvs-powered:
0058 description: |
0059 Transfer PMIC to SNVS state at reset
0060 type: boolean
0061
0062 # Configure the "short press" and "long press" timers for the power button.
0063 # Values are rounded to what hardware supports
0064 # Short-press:
0065 # Shortest being 10ms, next 500ms and then multiple of 500ms up to 7,5s
0066 # Long-press:
0067 # Shortest being 10ms, next 1000ms and then multiple of 1000ms up to 15s
0068 # If these properties are not present the existing configuration (from
0069 # bootloader or OTP) is not touched.
0070
0071 rohm,short-press-ms:
0072 description:
0073 Short press duration in milliseconds
0074 enum:
0075 - 10
0076 - 500
0077 - 1000
0078 - 1500
0079 - 2000
0080 - 2500
0081 - 3000
0082 - 3500
0083 - 4000
0084 - 4500
0085 - 5000
0086 - 5500
0087 - 6000
0088 - 6500
0089 - 7000
0090
0091 rohm,long-press-ms:
0092 description:
0093 Long press duration in milliseconds
0094 enum:
0095 - 10
0096 - 1000
0097 - 2000
0098 - 3000
0099 - 4000
0100 - 5000
0101 - 6000
0102 - 7000
0103 - 8000
0104 - 9000
0105 - 10000
0106 - 11000
0107 - 12000
0108 - 13000
0109 - 14000
0110
0111 regulators:
0112 $ref: ../regulator/rohm,bd71837-regulator.yaml
0113 description:
0114 List of child nodes that specify the regulators.
0115
0116 required:
0117 - compatible
0118 - reg
0119 - interrupts
0120 - clocks
0121 - "#clock-cells"
0122 - regulators
0123
0124 additionalProperties: false
0125
0126 examples:
0127 - |
0128 #include <dt-bindings/interrupt-controller/irq.h>
0129 #include <dt-bindings/leds/common.h>
0130
0131 i2c {
0132 #address-cells = <1>;
0133 #size-cells = <0>;
0134 pmic: pmic@4b {
0135 compatible = "rohm,bd71837";
0136 reg = <0x4b>;
0137 interrupt-parent = <&gpio1>;
0138 interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
0139 #clock-cells = <0>;
0140 clocks = <&osc 0>;
0141 rohm,reset-snvs-powered;
0142 rohm,short-press-ms = <10>;
0143 rohm,long-press-ms = <2000>;
0144
0145 regulators {
0146 buck1: BUCK1 {
0147 regulator-name = "buck1";
0148 regulator-min-microvolt = <700000>;
0149 regulator-max-microvolt = <1300000>;
0150 regulator-boot-on;
0151 regulator-always-on;
0152 regulator-ramp-delay = <1250>;
0153 rohm,dvs-run-voltage = <900000>;
0154 rohm,dvs-idle-voltage = <850000>;
0155 rohm,dvs-suspend-voltage = <800000>;
0156 };
0157 buck2: BUCK2 {
0158 regulator-name = "buck2";
0159 regulator-min-microvolt = <700000>;
0160 regulator-max-microvolt = <1300000>;
0161 regulator-boot-on;
0162 regulator-always-on;
0163 regulator-ramp-delay = <1250>;
0164 rohm,dvs-run-voltage = <1000000>;
0165 rohm,dvs-idle-voltage = <900000>;
0166 };
0167 buck3: BUCK3 {
0168 regulator-name = "buck3";
0169 regulator-min-microvolt = <700000>;
0170 regulator-max-microvolt = <1300000>;
0171 regulator-boot-on;
0172 rohm,dvs-run-voltage = <1000000>;
0173 };
0174 buck4: BUCK4 {
0175 regulator-name = "buck4";
0176 regulator-min-microvolt = <700000>;
0177 regulator-max-microvolt = <1300000>;
0178 regulator-boot-on;
0179 rohm,dvs-run-voltage = <1000000>;
0180 };
0181 buck5: BUCK5 {
0182 regulator-name = "buck5";
0183 regulator-min-microvolt = <700000>;
0184 regulator-max-microvolt = <1350000>;
0185 regulator-boot-on;
0186 };
0187 buck6: BUCK6 {
0188 regulator-name = "buck6";
0189 regulator-min-microvolt = <3000000>;
0190 regulator-max-microvolt = <3300000>;
0191 regulator-boot-on;
0192 };
0193 buck7: BUCK7 {
0194 regulator-name = "buck7";
0195 regulator-min-microvolt = <1605000>;
0196 regulator-max-microvolt = <1995000>;
0197 regulator-boot-on;
0198 };
0199 buck8: BUCK8 {
0200 regulator-name = "buck8";
0201 regulator-min-microvolt = <800000>;
0202 regulator-max-microvolt = <1400000>;
0203 };
0204
0205 ldo1: LDO1 {
0206 regulator-name = "ldo1";
0207 regulator-min-microvolt = <3000000>;
0208 regulator-max-microvolt = <3300000>;
0209 regulator-boot-on;
0210 };
0211 ldo2: LDO2 {
0212 regulator-name = "ldo2";
0213 regulator-min-microvolt = <900000>;
0214 regulator-max-microvolt = <900000>;
0215 regulator-boot-on;
0216 };
0217 ldo3: LDO3 {
0218 regulator-name = "ldo3";
0219 regulator-min-microvolt = <1800000>;
0220 regulator-max-microvolt = <3300000>;
0221 };
0222 ldo4: LDO4 {
0223 regulator-name = "ldo4";
0224 regulator-min-microvolt = <900000>;
0225 regulator-max-microvolt = <1800000>;
0226 };
0227 ldo5: LDO5 {
0228 regulator-name = "ldo5";
0229 regulator-min-microvolt = <1800000>;
0230 regulator-max-microvolt = <3300000>;
0231 };
0232 ldo6: LDO6 {
0233 regulator-name = "ldo6";
0234 regulator-min-microvolt = <900000>;
0235 regulator-max-microvolt = <1800000>;
0236 };
0237 ldo7_reg: LDO7 {
0238 regulator-name = "ldo7";
0239 regulator-min-microvolt = <1800000>;
0240 regulator-max-microvolt = <3300000>;
0241 };
0242 };
0243 };
0244 };
