61 lines
1.6 KiB
YAML
61 lines
1.6 KiB
YAML
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# Copyright (c) 2019-2023 Henrik Brix Andersen <henrik@brixandersen.dk>
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# SPDX-License-Identifier: Apache-2.0
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description: NXP PCF8523 RTC
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compatible: "nxp,pcf8523"
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include:
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- name: rtc-device.yaml
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- name: i2c-device.yaml
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- name: pm.yaml
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property-allowlist:
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- wakeup-source
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properties:
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quartz-load-femtofarads:
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type: int
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enum:
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- 7000
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- 12500
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default: 7000
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description: |
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Capacitive load of the quartz crystal in femtofarads (fF). Default is 7000 femtofarads (equal
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to 7pF) which corresponds to the reset value of the CAP_SEL field in the "Control 1" register
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of the PCF8523.
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clkout-frequency:
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type: int
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default: 32768
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enum:
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- 32768
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- 16384
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- 8192
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- 4096
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- 1024
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- 32
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- 1
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- 0
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description: |
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Frequency of the CLKOUT signal in Hertz (Hz). Default is 32768 Hz which corresponds to the
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reset value of the COF field in the Tmr_CLKOUT_ctrl register of the PCF8523. Set to 0 to
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disable the CLKOUT signal (High-Z).
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battery-switch-over:
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type: string
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required: true
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enum:
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- standard
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- direct
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- disabled
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description: |
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Battery switch-over function selection:
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- standard: The power failure condition happens when VDD < VBAT and VDD < Vth(sw)bat
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- direct: The power failure condition happens when VDD < VBAT
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- disabled: Battery switch-over disabled - only one power supply (VDD)
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int1-gpios:
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type: phandle-array
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description: |
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GPIO connected to the PC8523 INT1 interrupt output. This signal is open-drain, active low.
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