5d4353dc9a
Add clock source selection for stimer and make it configurable Signed-off-by: Hao Luo <hluo@ambiq.com>
42 lines
1.6 KiB
YAML
42 lines
1.6 KiB
YAML
# Copyright (c) 2023 Antmicro <www.antmicro.com>
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# SPDX-License-Identifier: Apache-2.0
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description: Ambiq STIMER
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compatible: "ambiq,stimer"
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include: base.yaml
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properties:
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reg:
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required: true
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interrupts:
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required: true
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clk-source:
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type: int
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required: true
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description: |
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clk-source specifies the clock source that used by the system timer.
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For Apollo3:
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0 - NOCLK : No clock enabled.
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1 - HFRC_DIV16 : 3MHz from the HFRC clock divider.
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2 - HFRC_DIV256 : 187.5KHz from the HFRC clock divider.
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3 - XTAL_DIV1 : 32768Hz from the crystal oscillator.
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4 - XTAL_DIV2 : 16384Hz from the crystal oscillator.
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5 - XTAL_DIV32 : 1024Hz from the crystal oscillator.
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6 - LFRC_DIV1 : Approximately 1KHz from the LFRC oscillator (uncalibrated).
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7 - CTIMER0A : Use CTIMER 0 section A as a prescaler.
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8 - CTIMER0B : Use CTIMER 0 section B (or A and B linked together) as a prescaler.
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For Apollo4:
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0 - NOCLK : No clock enabled.
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1 - HFRC_6MHZ : 6MHz from the HFRC clock divider.
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2 - HFRC_375KHZ : 375KHz from the HFRC clock divider.
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3 - XTAL_32KHZ : 32768Hz from the crystal oscillator.
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4 - XTAL_16KHZ : 16384Hz from the crystal oscillator.
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5 - XTAL_1KHZ : 1024Hz from the crystal oscillator.
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6 - LFRC_1KHZ : Approximately 1KHz from the LFRC oscillator (uncalibrated).
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7 - CTIMER0 : Use CTIMER 0 for the clock source (allows prescaling from other system clocks).
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8 - CTIMER1 : Use CTIMER 1 for the clock source (allows prescaling from other system clocks).
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