diff options
| author | Emanuele Ghidoli <emanuele.ghidoli@toradex.com> | 2025-04-14 19:14:54 +0200 |
|---|---|---|
| committer | Sebastian Reichel <sebastian.reichel@collabora.com> | 2025-04-29 01:13:09 +0200 |
| commit | 1cf87b00a74d3ee3006d825855e0075ddd2eab2f (patch) | |
| tree | 88b27e59e658498986560226f9ceb496211ecce2 | |
| parent | c1f7375a246e5f810191a6c3031d2fa2b80e9f5e (diff) | |
dt-bindings: power: reset: add toradex,smarc-ec
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>
| -rw-r--r-- | Documentation/devicetree/bindings/power/reset/toradex,smarc-ec.yaml | 52 | ||||
| -rw-r--r-- | MAINTAINERS | 6 |
2 files changed, 58 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/power/reset/toradex,smarc-ec.yaml b/Documentation/devicetree/bindings/power/reset/toradex,smarc-ec.yaml new file mode 100644 index 000000000000..ffcd5f2c2bf6 --- /dev/null +++ b/Documentation/devicetree/bindings/power/reset/toradex,smarc-ec.yaml @@ -0,0 +1,52 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/power/reset/toradex,smarc-ec.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Toradex Embedded Controller + +maintainers: + - Emanuele Ghidoli <emanuele.ghidoli@toradex.com> + - Francesco Dolcini <francesco.dolcini@toradex.com> + +description: | + The Toradex Embedded Controller (EC) is used on Toradex SMARC modules, + primarily to manage power and reset functionalities. + + The EC provides the following functions: + - Reads the SMARC POWER_BTN# and RESET_IN# signals and controls the PMIC accordingly. + - Controls the SoC boot mode signals based on the SMARC BOOT_SEL# and FORCE_RECOV# inputs. + - Manages the CARRIER_STDBY# signal in response to relevant SoC signals. + + The EC runs a small firmware, factory programmed into its internal flash, and communicates over I2C. + It allows software to control power-off and reset functionalities of the module. + +properties: + compatible: + items: + - enum: + - toradex,smarc-imx95-ec + - toradex,smarc-imx8mp-ec + - const: toradex,smarc-ec + + reg: + maxItems: 1 + +required: + - compatible + - reg + +additionalProperties: false + +examples: + - | + i2c { + #address-cells = <1>; + #size-cells = <0>; + + reset-controller@28 { + compatible = "toradex,smarc-imx95-ec", "toradex,smarc-ec"; + reg = <0x28>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 96b827049501..e6903d2bb741 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -24406,6 +24406,12 @@ L: platform-driver-x86@vger.kernel.org S: Maintained F: drivers/platform/x86/topstar-laptop.c +TORADEX EMBEDDED CONTROLLER DRIVER +M: Emanuele Ghidoli <ghidoliemanuele@gmail.com> +M: Francesco Dolcini <francesco@dolcini.it> +S: Maintained +F: Documentation/devicetree/bindings/power/reset/toradex,smarc-ec.yaml + TORTURE-TEST MODULES M: Davidlohr Bueso <dave@stgolabs.net> M: "Paul E. McKenney" <paulmck@kernel.org> |