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dt-bindings: iio: adc: adi,ad7606: add SPI offload properties

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Add #trigger-source-cells property to allow the BUSY output to be
used as a SPI offload trigger source to indicate when a sample is ready
to be read.

Macros are added to adi,ad7606.h for the cell values to help with
readability since they are arbitrary values.

Signed-off-by: Angelo Dureghello <adureghello@baylibre.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250403-wip-bl-spi-offload-ad7606-v1-1-1b00cb638b12@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Angelo Dureghello 2025-04-03 18:19:04 +02:00 committed by Jonathan Cameron
parent 81a481f625
commit 81fe5529e8
2 changed files with 17 additions and 0 deletions
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8
Documentation/devicetree/bindings/iio/adc/adi,ad7606.yaml
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@ -45,6 +45,14 @@ properties:
"#size-cells":
const: 0
'#trigger-source-cells':
description: |
Cell indicates the output signal: 0 = BUSY, 1 = FIRSTDATA.
For convenience, macros for these values are available in
dt-bindings/iio/adc/adi,ad7606.h.
const: 1
# According to the datasheet, "Data is clocked in from SDI on the falling
# edge of SCLK, while data is clocked out on DOUTA on the rising edge of
# SCLK". Also, even if not stated textually in the datasheet, it is made

9
include/dt-bindings/iio/adc/adi,ad7606.h Normal file
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@ -0,0 +1,9 @@
/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) */
#ifndef _DT_BINDINGS_ADI_AD7606_H
#define _DT_BINDINGS_ADI_AD7606_H
#define AD7606_TRIGGER_EVENT_BUSY 0
#define AD7606_TRIGGER_EVENT_FRSTDATA 1
#endif /* _DT_BINDINGS_ADI_AD7606_H */