The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/contrib/device-tree/Bindings/mfd/rohm,bd71847-pmic.yaml

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    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     };

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