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

Source file repositories/reference/linux-study-clean/Documentation/devicetree/bindings/mfd/rohm,bd71847-pmic.yaml

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Linux kernel
Corpus path
Documentation/devicetree/bindings/mfd/rohm,bd71847-pmic.yaml
Extension
.yaml
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7285 bytes
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229
Domain
Support Tooling And Documentation
Bucket
Documentation
Inferred role
Support Tooling And Documentation: configuration, schema, or hardware description
Status
atlas-only

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Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
%YAML 1.2
---
$id: http://devicetree.org/schemas/mfd/rohm,bd71847-pmic.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: ROHM BD71847 and BD71850 Power Management Integrated Circuit

maintainers:
  - Matti Vaittinen <mazziesaccount@gmail.com>

description: |
  BD71847AMWV and BD71850MWV are programmable Power Management ICs for powering
  single-core,  dual-core, and quad-core SoCs such as NXP-i.MX 8M. It is
  optimized for low BOM cost and compact solution footprint. BD71847MWV and
  BD71850MWV integrate 6 Buck regulators and 6 LDOs.
  Datasheets are available at
  https://www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applications/nxp-imx/bd71847amwv-product
  https://www.rohm.com/products/power-management/power-management-ic-for-system/industrial-consumer-applications/nxp-imx/bd71850mwv-product

properties:
  compatible:
    enum:
      - rohm,bd71847
      - rohm,bd71850

  reg:
    description:
      I2C slave address.
    maxItems: 1

  interrupts:
    maxItems: 1

  clocks:
    maxItems: 1

  "#clock-cells":
    const: 0

  clock-output-names:
    maxItems: 1

# The BD71847 abd BD71850 support two different HW states as reset target
# states. States are called as SNVS and READY. At READY state all the PMIC
# power outputs go down and OTP is reload. At the SNVS state all other logic
# and external devices apart from the SNVS power domain are shut off. Please
# refer to NXP i.MX8 documentation for further information regarding SNVS
# state. When a reset is done via SNVS state the PMIC OTP data is not reload.
# This causes power outputs that have been under SW control to stay down when
# reset has switched power state to SNVS. If reset is done via READY state the
# power outputs will be returned to HW control by OTP loading. Thus the reset
# target state is set to READY by default. If SNVS state is used the boot
# crucial regulators must have the regulator-always-on and regulator-boot-on
# properties set in regulator node.

  rohm,reset-snvs-powered:
    description:
      Transfer PMIC to SNVS state at reset.
    type: boolean

# Configure the "short press" and "long press" timers for the power button.
# Values are rounded to what hardware supports
# Short-press:
#   Shortest being 10ms, next 500ms and then multiple of 500ms up to 7,5s
# Long-press:
#   Shortest being 10ms, next 1000ms and then multiple of 1000ms up to 15s
# If these properties are not present the existing # configuration (from
# bootloader or OTP) is not touched.

Annotation

Implementation Notes