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dts: bindings: clock: nrf53-hfxo: add startup-time-us prop

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Add the clock startup time property to the nrf53 series HFXO binding.

Note that the values added to the soc .dtsi files are worst case
defaults, which will be replaced with optimal values at board level
in the future, as they depend on the specific crystal in use.

Signed-off-by: Bjarki Arge Andreasen <bjarki.andreasen@nordicsemi.no>
This commit is contained in:
Bjarki Arge Andreasen 2025-05-26 16:02:31 +02:00 committed by Benjamin Cabé
parent a81dad9c5b
commit b9fdef65ca
2 changed files with 15 additions and 0 deletions
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1
dts/arm/nordic/nrf5340_cpuapp_peripherals.dtsi
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@ -26,6 +26,7 @@ oscillators: clock-controller@4000 {
compatible = "nordic,nrf53-hfxo";
#clock-cells = <0>;
clock-frequency = <DT_FREQ_M(32)>;
startup-time-us = <1400>;
};
};

14
dts/bindings/clock/nordic,nrf53-hfxo.yaml
View File

@ -11,6 +11,20 @@ properties:
clock-frequency:
const: 32000000
startup-time-us:
type: int
required: true
description: |
Startup time in microseconds.
The value can be obtained by first measuring the time between
TASKS_HFCLKSTART and EVENTS_HFCLKSTARTED. Then multiply
the value by 2 to account for temperature and supply variations.
Note that the startup time will be longer usual on the first
power-up and as such should not be used to determine
startup-time-us.
load-capacitors:
type: string
enum: