Re: [PATCH 1/2] dt-bindings: wkup-m3-ipc: Add ti,scale-data-fw property
From: Rob Herring
Date: Mon Apr 25 2022 - 12:22:28 EST
On Sun, Apr 24, 2022 at 10:28:05PM -0700, Drew Fustini wrote:
> From: Dave Gerlach <d-gerlach@xxxxxx>
> Add documentation for ti,scale-data-fw property to enable I2C PMIC
> voltage scaling during deep sleep. The property contains the name of a
> binary file for the CM3 firmware to load.
> Based on previous work by Russ Dill.
> Signed-off-by: Dave Gerlach <d-gerlach@xxxxxx>
> Signed-off-by: Keerthy <j-keerthy@xxxxxx>
> [dfustini: split from driver patch and convert to json-schema]
> Signed-off-by: Drew Fustini <dfustini@xxxxxxxxxxxx>
> .../devicetree/bindings/soc/ti/wkup-m3-ipc.yaml | 11 +++++++++++
> 1 file changed, 11 insertions(+)
> diff --git a/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml b/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml
> index 88d690de050c..d2c248d82384 100644
> --- a/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml
> +++ b/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml
> @@ -40,6 +40,12 @@ description: |+
> override the pin's existing bias (pull-up/pull-down) and value (high/low) when
> IO isolation is active.
> + Support for I2C PMIC Voltage Scaling
> + ====================================
> + It is possible to pass the name of a binary file to load into the CM3 memory.
> + The binary data is the I2C sequences for the CM3 to send out to the PMIC
> + during low power mode entry.
> @@ -67,6 +73,11 @@ properties:
> mbox_wkupm3 child node.
> maxItems: 1
> + ti,scale-data-fw:
> + $ref: /schemas/types.yaml#/definitions/string
> + description:
> + Name of the firmware binary in /lib/firmware to copy to CM3 aux data
The location of firmware files is up to the OS.
Is there other firmware? If not, 'firmware-name' is the somewhat
standard property for this.
What's the default name?
> $ref: /schemas/types.yaml#/definitions/uint32
> description: GPIO pin connected to enable pin on VTT regulator