Documentation/devicetree/bindings/mfd/rohm,bd71847-pmic.yaml

   1 # SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/mfd/rohm,bd71847-pmic.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: ROHM BD71847 and BD71850 Power Management Integrated Circuit bindings
   8
   9 maintainers:
  10   - Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>
  11
  12 description: |
  13   BD71847AMWV and BD71850MWV are programmable Power Management ICs for powering
  14   single-core,  dual-core, and quad-core SoCs such as NXP-i.MX 8M. It is
  15   optimized for low BOM cost and compact solution footprint. BD71847MWV and
  16   BD71850MWV integrate 6 Buck regulators and 6 LDOs.
  17   Datasheets are available at
  18   https://www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applications/nxp-imx/bd71847amwv-product
  19   https://www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applications/nxp-imx/bd71850mwv-product
  20
  21 properties:
  22   compatible:
  23     enum:
  24       - rohm,bd71847
  25       - rohm,bd71850
  26
  27   reg:
  28     description:
  29       I2C slave address.
  30     maxItems: 1
  31
  32   interrupts:
  33     maxItems: 1
  34
  35   clocks:
  36     maxItems: 1
  37
  38   "#clock-cells":
  39     const: 0
  40
  41   clock-output-names:
  42     maxItems: 1
  43
  44 # The BD71847 abd BD71850 support two different HW states as reset target
  45 # states. States are called as SNVS and READY. At READY state all the PMIC
  46 # power outputs go down and OTP is reload. At the SNVS state all other logic
  47 # and external devices apart from the SNVS power domain are shut off. Please
  48 # refer to NXP i.MX8 documentation for further information regarding SNVS
  49 # state. When a reset is done via SNVS state the PMIC OTP data is not reload.
  50 # This causes power outputs that have been under SW control to stay down when
  51 # reset has switched power state to SNVS. If reset is done via READY state the
  52 # power outputs will be returned to HW control by OTP loading. Thus the reset
  53 # target state is set to READY by default. If SNVS state is used the boot
  54 # crucial regulators must have the regulator-always-on and regulator-boot-on
  55 # properties set in regulator node.
  56
  57   rohm,reset-snvs-powered:
  58     description:
  59       Transfer PMIC to SNVS state at reset.
  60     type: boolean
  61
  62 # Configure the "short press" and "long press" timers for the power button.
  63 # Values are rounded to what hardware supports
  64 # Short-press:
  65 #   Shortest being 10ms, next 500ms and then multiple of 500ms up to 7,5s
  66 # Long-press:
  67 #   Shortest being 10ms, next 1000ms and then multiple of 1000ms up to 15s
  68 # If these properties are not present the existing # configuration (from
  69 # bootloader or OTP) is not touched.
  70
  71   rohm,short-press-ms:
  72     description:
  73       Short press duration in milliseconds
  74     enum:
  75       - 10
  76       - 500
  77       - 1000
  78       - 1500
  79       - 2000
  80       - 2500
  81       - 3000
  82       - 3500
  83       - 4000
  84       - 4500
  85       - 5000
  86       - 5500
  87       - 6000
  88       - 6500
  89       - 7000
  90       - 7500
  91
  92   rohm,long-press-ms:
  93     description:
  94       Long press duration in milliseconds
  95     enum:
  96       - 10
  97       - 1000
  98       - 2000
  99       - 3000
 100       - 4000
 101       - 5000
 102       - 6000
 103       - 7000
 104       - 8000
 105       - 9000
 106       - 10000
 107       - 11000
 108       - 12000
 109       - 13000
 110       - 14000
 111       - 15000
 112
 113   regulators:
 114     $ref: ../regulator/rohm,bd71847-regulator.yaml
 115     description:
 116       List of child nodes that specify the regulators.
 117
 118 required:
 119   - compatible
 120   - reg
 121   - interrupts
 122   - regulators
 123
 124 additionalProperties: false
 125
 126 dependencies:
 127   '#clock-cells': [clocks]
 128   clocks: ['#clock-cells']
 129
 130 examples:
 131   - |
 132     #include <dt-bindings/interrupt-controller/irq.h>
 133     #include <dt-bindings/leds/common.h>
 134
 135     i2c {
 136         #address-cells = <1>;
 137         #size-cells = <0>;
 138         pmic: pmic@4b {
 139             compatible = "rohm,bd71847";
 140             reg = <0x4b>;
 141             interrupt-parent = <&gpio1>;
 142             interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
 143             #clock-cells = <0>;
 144             clocks = <&osc 0>;
 145             rohm,reset-snvs-powered;
 146             rohm,short-press-ms = <10>;
 147             rohm,long-press-ms = <2000>;
 148
 149             regulators {
 150                 buck1: BUCK1 {
 151                     regulator-name = "buck1";
 152                     regulator-min-microvolt = <700000>;
 153                     regulator-max-microvolt = <1300000>;
 154                     regulator-boot-on;
 155                     regulator-always-on;
 156                     regulator-ramp-delay = <1250>;
 157                     rohm,dvs-run-voltage = <900000>;
 158                     rohm,dvs-idle-voltage = <850000>;
 159                     rohm,dvs-suspend-voltage = <800000>;
 160                 };
 161                 buck2: BUCK2 {
 162                     regulator-name = "buck2";
 163                     regulator-min-microvolt = <700000>;
 164                     regulator-max-microvolt = <1300000>;
 165                     regulator-boot-on;
 166                     regulator-always-on;
 167                     regulator-ramp-delay = <1250>;
 168                     rohm,dvs-run-voltage = <1000000>;
 169                     rohm,dvs-idle-voltage = <900000>;
 170                 };
 171                 buck3: BUCK3 {
 172                     regulator-name = "buck3";
 173                     regulator-min-microvolt = <550000>;
 174                     regulator-max-microvolt = <1350000>;
 175                     regulator-boot-on;
 176                 };
 177                 buck4: BUCK4 {
 178                     regulator-name = "buck4";
 179                     regulator-min-microvolt = <2600000>;
 180                     regulator-max-microvolt = <3300000>;
 181                     regulator-boot-on;
 182                 };
 183                 buck5: BUCK5 {
 184                     regulator-name = "buck5";
 185                     regulator-min-microvolt = <1605000>;
 186                     regulator-max-microvolt = <1995000>;
 187                     regulator-boot-on;
 188                 };
 189                 buck8: BUCK6 {
 190                     regulator-name = "buck6";
 191                     regulator-min-microvolt = <800000>;
 192                     regulator-max-microvolt = <1400000>;
 193                 };
 194
 195                 ldo1: LDO1 {
 196                     regulator-name = "ldo1";
 197                     regulator-min-microvolt = <1600000>;
 198                     regulator-max-microvolt = <3300000>;
 199                     regulator-boot-on;
 200                 };
 201                 ldo2: LDO2 {
 202                     regulator-name = "ldo2";
 203                     regulator-min-microvolt = <800000>;
 204                     regulator-max-microvolt = <900000>;
 205                     regulator-boot-on;
 206                 };
 207                 ldo3: LDO3 {
 208                     regulator-name = "ldo3";
 209                     regulator-min-microvolt = <1800000>;
 210                     regulator-max-microvolt = <3300000>;
 211                 };
 212                 ldo4: LDO4 {
 213                     regulator-name = "ldo4";
 214                     regulator-min-microvolt = <900000>;
 215                     regulator-max-microvolt = <1800000>;
 216                 };
 217                 ldo5: LDO5 {
 218                     regulator-name = "ldo5";
 219                     regulator-min-microvolt = <800000>;
 220                     regulator-max-microvolt = <3300000>;
 221                 };
 222                 ldo6: LDO6 {
 223                     regulator-name = "ldo6";
 224                     regulator-min-microvolt = <900000>;
 225                     regulator-max-microvolt = <1800000>;
 226                 };
 227             };
 228         };
 229     };