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On STM32MP25 SoC, the syscfg peripheral provides a clock to the display subsystem through a multiplexer. Since it only provides a single clock, the cell value is 0. Doing so allows the clock consumers to reach the peripheral and gate the clock accordingly. Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Reviewed-by: Yannick Fertre <yannick.fertre@foss.st.com> Acked-by: Christophe Roullier <christophe.roullier@foss.st.com> Link: https://lore.kernel.org/r/20250822-drm-misc-next-v5-6-9c825e28f733@foss.st.com Signed-off-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
77 lines
1.6 KiB
YAML
77 lines
1.6 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/arm/stm32/st,stm32-syscon.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: STMicroelectronics STM32 Platforms System Controller
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maintainers:
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- Alexandre Torgue <alexandre.torgue@foss.st.com>
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- Christophe Roullier <christophe.roullier@foss.st.com>
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properties:
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compatible:
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oneOf:
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- items:
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- enum:
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- st,stm32-power-config
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- st,stm32-syscfg
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- st,stm32-tamp
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- st,stm32f4-gcan
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- st,stm32mp151-pwr-mcu
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- st,stm32mp157-syscfg
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- st,stm32mp21-syscfg
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- st,stm32mp23-syscfg
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- st,stm32mp25-syscfg
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- const: syscon
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- items:
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- const: st,stm32-tamp
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- const: syscon
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- const: simple-mfd
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reg:
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maxItems: 1
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clocks:
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maxItems: 1
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"#clock-cells":
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const: 0
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required:
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- compatible
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- reg
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allOf:
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- if:
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properties:
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compatible:
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contains:
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enum:
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- st,stm32mp157-syscfg
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- st,stm32f4-gcan
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then:
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required:
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- clocks
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- if:
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properties:
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compatible:
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const: st,stm32mp25-syscfg
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then:
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required:
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- "#clock-cells"
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additionalProperties: false
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examples:
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- |
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#include <dt-bindings/clock/stm32mp1-clks.h>
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syscfg: syscon@50020000 {
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compatible = "st,stm32mp157-syscfg", "syscon";
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reg = <0x50020000 0x400>;
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clocks = <&rcc SYSCFG>;
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};
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...
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