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8e8fbab4f1
The rtc on PolarFire SoC does not use the AHB clock as its reference
frequency, but rather a 1 MHz refclk that it shares with MTIMER. Add
this second clock to the binding as a required property.
Fixes: 4cbcc0d7b3 ("dt-bindings: rtc: add bindings for microchip mpfs rtc")
Reviewed-by: Daire McNamara <daire.mcnamara@microchip.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20220413075835.3354193-7-conor.dooley@microchip.com
Acked-by: Palmer Dabbelt <palmer@rivosinc.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
67 lines
1.5 KiB
YAML
67 lines
1.5 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/rtc/microchip,mfps-rtc.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Microchip PolarFire Soc (MPFS) RTC Device Tree Bindings
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allOf:
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- $ref: rtc.yaml#
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maintainers:
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- Daire McNamara <daire.mcnamara@microchip.com>
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- Lewis Hanly <lewis.hanly@microchip.com>
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properties:
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compatible:
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enum:
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- microchip,mpfs-rtc
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reg:
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maxItems: 1
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interrupts:
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items:
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- description: |
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RTC_WAKEUP interrupt
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- description: |
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RTC_MATCH, asserted when the content of the Alarm register is equal
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to that of the RTC's count register.
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clocks:
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items:
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- description: |
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AHB clock
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- description: |
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Reference clock: divided by the prescaler to create a time-based
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strobe (typically 1 Hz) for the calendar counter. By default, the rtc
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on the PolarFire SoC shares it's reference with MTIMER so this will
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be a 1 MHz clock.
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clock-names:
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items:
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- const: rtc
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- const: rtcref
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required:
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- compatible
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- reg
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- interrupts
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- clocks
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- clock-names
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additionalProperties: false
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examples:
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- |
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#include "dt-bindings/clock/microchip,mpfs-clock.h"
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rtc@20124000 {
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compatible = "microchip,mpfs-rtc";
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reg = <0x20124000 0x1000>;
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clocks = <&clkcfg CLK_RTC>, <&clkcfg CLK_RTCREF>;
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clock-names = "rtc", "rtcref";
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interrupts = <80>, <81>;
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};
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...
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