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dt-bindings: wkup-m3-ipc: Add firmware-name property

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Document that the firmware-name property can be used to indicate a file
contains I2C sequences for PMIC voltage scaling during deep sleep.

Based on previous work by Russ Dill.

Signed-off-by: Dave Gerlach <d-gerlach@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
[dfustini: split from driver patch and convert to json-schema]
Signed-off-by: Drew Fustini <dfustini@baylibre.com>
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220426200741.712842-2-dfustini@baylibre.com
This commit is contained in:
Dave Gerlach 2022-04-26 13:07:42 -07:00 committed by Rob Herring
parent 8274c8eae1
commit 1d7aff7788
1 changed files with 12 additions and 0 deletions
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12
Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml
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@ -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.
properties:
compatible:
enum:
@ -67,6 +73,10 @@ properties:
mbox_wkupm3 child node.
maxItems: 1
firmware-name:
description:
Name of binary file with I2C sequences for PMIC voltage scaling
ti,vtt-gpio-pin:
$ref: /schemas/types.yaml#/definitions/uint32
description: GPIO pin connected to enable pin on VTT regulator
@ -117,6 +127,7 @@ examples:
ti,rproc = <&wkup_m3>;
mboxes = <&am335x_mailbox &mbox_wkupm3>;
ti,vtt-gpio-pin = <7>;
firmware-name = "am335x-evm-scale-data.bin";
};
};
@ -157,6 +168,7 @@ examples:
ti,rproc = <&wkup_m3>;
mboxes = <&am437x_mailbox &mbox_wkupm3>;
ti,set-io-isolation;
firmware-name = "am43x-evm-scale-data.bin";
};
};