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 # The BD71847 abd BD71850 support two different HW states as reset target
  42 # states. States are called as SNVS and READY. At READY state all the PMIC
  43 # power outputs go down and OTP is reload. At the SNVS state all other logic
  44 # and external devices apart from the SNVS power domain are shut off. Please
  45 # refer to NXP i.MX8 documentation for further information regarding SNVS
  46 # state. When a reset is done via SNVS state the PMIC OTP data is not reload.
  47 # This causes power outputs that have been under SW control to stay down when
  48 # reset has switched power state to SNVS. If reset is done via READY state the
  49 # power outputs will be returned to HW control by OTP loading. Thus the reset
  50 # target state is set to READY by default. If SNVS state is used the boot
  51 # crucial regulators must have the regulator-always-on and regulator-boot-on
  52 # properties set in regulator node.
  53
  54   rohm,reset-snvs-powered:
  55     description:
  56       Transfer PMIC to SNVS state at reset.
  57     type: boolean
  58
  59 # Configure the "short press" and "long press" timers for the power button.
  60 # Values are rounded to what hardware supports
  61 # Short-press:
  62 #   Shortest being 10ms, next 500ms and then multiple of 500ms up to 7,5s
  63 # Long-press:
  64 #   Shortest being 10ms, next 1000ms and then multiple of 1000ms up to 15s
  65 # If these properties are not present the existing # configuration (from
  66 # bootloader or OTP) is not touched.
  67
  68   rohm,short-press-ms:
  69     description:
  70       Short press duration in milliseconds
  71     enum:
  72       - 10
  73       - 500
  74       - 1000
  75       - 1500
  76       - 2000
  77       - 2500
  78       - 3000
  79       - 3500
  80       - 4000
  81       - 4500
  82       - 5000
  83       - 5500
  84       - 6000
  85       - 6500
  86       - 7000
  87       - 7500
  88
  89   rohm,long-press-ms:
  90     description:
  91       Long press duration in milliseconds
  92     enum:
  93       - 10
  94       - 1000
  95       - 2000
  96       - 3000
  97       - 4000
  98       - 5000
  99       - 6000
 100       - 7000
 101       - 8000
 102       - 9000
 103       - 10000
 104       - 11000
 105       - 12000
 106       - 13000
 107       - 14000
 108       - 15000
 109
 110   regulators:
 111     $ref: ../regulator/rohm,bd71847-regulator.yaml
 112     description:
 113       List of child nodes that specify the regulators.
 114
 115 required:
 116   - compatible
 117   - reg
 118   - interrupts
 119   - clocks
 120   - "#clock-cells"
 121   - regulators
 122
 123 additionalProperties: false
 124
 125 examples:
 126   - |
 127     #include <dt-bindings/interrupt-controller/irq.h>
 128     #include <dt-bindings/leds/common.h>
 129
 130     i2c {
 131       pmic: pmic@4b {
 132             compatible = "rohm,bd71847";
 133             reg = <0x4b>;
 134             interrupt-parent = <&gpio1>;
 135             interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
 136             #clock-cells = <0>;
 137             clocks = <&osc 0>;
 138             rohm,reset-snvs-powered;
 139             rohm,short-press-ms = <10>;
 140             rohm,long-press-ms = <2000>;
 141
 142             regulators {
 143                 buck1: BUCK1 {
 144                     regulator-name = "buck1";
 145                     regulator-min-microvolt = <700000>;
 146                     regulator-max-microvolt = <1300000>;
 147                     regulator-boot-on;
 148                     regulator-always-on;
 149                     regulator-ramp-delay = <1250>;
 150                     rohm,dvs-run-voltage = <900000>;
 151                     rohm,dvs-idle-voltage = <850000>;
 152                     rohm,dvs-suspend-voltage = <800000>;
 153                 };
 154                 buck2: BUCK2 {
 155                     regulator-name = "buck2";
 156                     regulator-min-microvolt = <700000>;
 157                     regulator-max-microvolt = <1300000>;
 158                     regulator-boot-on;
 159                     regulator-always-on;
 160                     regulator-ramp-delay = <1250>;
 161                     rohm,dvs-run-voltage = <1000000>;
 162                     rohm,dvs-idle-voltage = <900000>;
 163                 };
 164                 buck3: BUCK3 {
 165                     regulator-name = "buck3";
 166                     regulator-min-microvolt = <550000>;
 167                     regulator-max-microvolt = <1350000>;
 168                     regulator-boot-on;
 169                 };
 170                 buck4: BUCK4 {
 171                     regulator-name = "buck4";
 172                     regulator-min-microvolt = <2600000>;
 173                     regulator-max-microvolt = <3300000>;
 174                     regulator-boot-on;
 175                 };
 176                 buck5: BUCK5 {
 177                     regulator-name = "buck5";
 178                     regulator-min-microvolt = <1605000>;
 179                     regulator-max-microvolt = <1995000>;
 180                     regulator-boot-on;
 181                 };
 182                 buck8: BUCK6 {
 183                     regulator-name = "buck6";
 184                     regulator-min-microvolt = <800000>;
 185                     regulator-max-microvolt = <1400000>;
 186                 };
 187
 188                 ldo1: LDO1 {
 189                     regulator-name = "ldo1";
 190                     regulator-min-microvolt = <1600000>;
 191                     regulator-max-microvolt = <3300000>;
 192                     regulator-boot-on;
 193                 };
 194                 ldo2: LDO2 {
 195                     regulator-name = "ldo2";
 196                     regulator-min-microvolt = <800000>;
 197                     regulator-max-microvolt = <900000>;
 198                     regulator-boot-on;
 199                 };
 200                 ldo3: LDO3 {
 201                     regulator-name = "ldo3";
 202                     regulator-min-microvolt = <1800000>;
 203                     regulator-max-microvolt = <3300000>;
 204                 };
 205                 ldo4: LDO4 {
 206                     regulator-name = "ldo4";
 207                     regulator-min-microvolt = <900000>;
 208                     regulator-max-microvolt = <1800000>;
 209                 };
 210                 ldo5: LDO5 {
 211                     regulator-name = "ldo5";
 212                     regulator-min-microvolt = <800000>;
 213                     regulator-max-microvolt = <3300000>;
 214                 };
 215                 ldo6: LDO6 {
 216                     regulator-name = "ldo6";
 217                     regulator-min-microvolt = <900000>;
 218                     regulator-max-microvolt = <1800000>;
 219                 };
 220             };
 221         };
 222     };