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1cf87b00a7
The Toradex Embedded Controller provides system power-off and restart functionalities. The two variants, SMARC iMX95 and SMARC iMX8P, have a compatible I2C interface. Besides this, different compatible values are defined to allow for future implementation differences. Signed-off-by: Emanuele Ghidoli <emanuele.ghidoli@toradex.com> Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com> Reviewed-by: Conor Dooley <conor.dooley@microchip.com> Link: https://lore.kernel.org/r/20250414171455.155155-2-francesco@dolcini.it Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
53 lines
1.4 KiB
YAML
53 lines
1.4 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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$id: http://devicetree.org/schemas/power/reset/toradex,smarc-ec.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Toradex Embedded Controller
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maintainers:
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- Emanuele Ghidoli <emanuele.ghidoli@toradex.com>
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- Francesco Dolcini <francesco.dolcini@toradex.com>
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description: |
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The Toradex Embedded Controller (EC) is used on Toradex SMARC modules,
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primarily to manage power and reset functionalities.
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The EC provides the following functions:
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- Reads the SMARC POWER_BTN# and RESET_IN# signals and controls the PMIC accordingly.
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- Controls the SoC boot mode signals based on the SMARC BOOT_SEL# and FORCE_RECOV# inputs.
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- Manages the CARRIER_STDBY# signal in response to relevant SoC signals.
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The EC runs a small firmware, factory programmed into its internal flash, and communicates over I2C.
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It allows software to control power-off and reset functionalities of the module.
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properties:
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compatible:
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items:
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- enum:
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- toradex,smarc-imx95-ec
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- toradex,smarc-imx8mp-ec
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- const: toradex,smarc-ec
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reg:
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maxItems: 1
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required:
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- compatible
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- reg
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additionalProperties: false
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examples:
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- |
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i2c {
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#address-cells = <1>;
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#size-cells = <0>;
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reset-controller@28 {
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compatible = "toradex,smarc-imx95-ec", "toradex,smarc-ec";
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reg = <0x28>;
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};
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};
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