From: Dave Gerlach <d-gerlach@xxxxxx>
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@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>
---
Changes from v2:
- fix the property name in this commit message
Changes from v1:
- change 'ti,scale-data-fw' to 'firmware-name'
- add 'firmware-name' property to the examples
.../devicetree/bindings/soc/ti/wkup-m3-ipc.yaml | 12 ++++++++++++
1 file changed, 12 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..0df41c4f60c1 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.
+
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";
};
};
--
2.32.0
