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# Copyright 2021 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
description: Fan parent node
compatible: "cros-ec,fans"
child-binding:
description: Fan's child node
properties:
rpm_min:
required: true
type: int
description:
Minimum fan speed (in RPM) to keep turning
rpm_start:
required: true
type: int
description:
Fan speed (in RPM) to begin turning
rpm_max:
required: true
type: int
description:
Maximum fan speed (in RPM)
pwms:
type: phandle-array
required: true
description:
PWM channel to control the fan
tach:
type: phandle
required: false
description:
Tachometer to measure the fan speed
not_use_rpm_mode:
required: false
type: boolean
description:
Disable automatic RPM control using tachometer input
use_fast_start:
required: false
type: boolean
description:
Fan requires a higher duty cycle to start up than to keep
running
pgood_gpio:
required: false
type: phandle
description:
Active high input GPIO which signals the power is good
enable_gpio:
required: false
type: phandle
description:
Active high output GPIO to enable the power
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