diff options
| author | David Lechner <dlechner@baylibre.com> | 2025-02-07 14:09:10 -0600 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2025-02-11 19:32:31 +0000 |
| commit | b7c1e069f54668461856f03696812ab7176c400d (patch) | |
| tree | 226b6da23dea26c88b62f1af8a08dc63843d091e | |
| parent | f06a9c36729b8de1a3891d7c04c34ab5a2c26174 (diff) | |
dt-bindings: iio: adc: adi,ad4695: add SPI offload properties
Add a pwms property to the adi,ad4695 binding to specify an optional PWM
output connected to the CNV pin on the ADC.
Also 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,ad4695.h for the cell values to help with
readability since they are arbitrary values.
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250207-dlech-mainline-spi-engine-offload-2-v8-13-e48a489be48c@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
| -rw-r--r-- | Documentation/devicetree/bindings/iio/adc/adi,ad4695.yaml | 13 | ||||
| -rw-r--r-- | include/dt-bindings/iio/adc/adi,ad4695.h | 7 |
2 files changed, 20 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/iio/adc/adi,ad4695.yaml b/Documentation/devicetree/bindings/iio/adc/adi,ad4695.yaml index 7d2229dee444..cbde7a0505d2 100644 --- a/Documentation/devicetree/bindings/iio/adc/adi,ad4695.yaml +++ b/Documentation/devicetree/bindings/iio/adc/adi,ad4695.yaml @@ -84,6 +84,10 @@ properties: description: The Reset Input (RESET). Should be configured GPIO_ACTIVE_LOW. maxItems: 1 + pwms: + description: PWM signal connected to the CNV pin. + maxItems: 1 + interrupts: minItems: 1 items: @@ -106,6 +110,15 @@ properties: The first cell is the GPn number: 0 to 3. The second cell takes standard GPIO flags. + '#trigger-source-cells': + description: | + First cell indicates the output signal: 0 = BUSY, 1 = ALERT. + Second cell indicates which GPn pin is used: 0, 2 or 3. + + For convenience, macros for these values are available in + dt-bindings/iio/adc/adi,ad4695.h. + const: 2 + "#address-cells": const: 1 diff --git a/include/dt-bindings/iio/adc/adi,ad4695.h b/include/dt-bindings/iio/adc/adi,ad4695.h index 9fbef542bf67..fea4525d2710 100644 --- a/include/dt-bindings/iio/adc/adi,ad4695.h +++ b/include/dt-bindings/iio/adc/adi,ad4695.h @@ -6,4 +6,11 @@ #define AD4695_COMMON_MODE_REFGND 0xFF #define AD4695_COMMON_MODE_COM 0xFE +#define AD4695_TRIGGER_EVENT_BUSY 0 +#define AD4695_TRIGGER_EVENT_ALERT 1 + +#define AD4695_TRIGGER_PIN_GP0 0 +#define AD4695_TRIGGER_PIN_GP2 2 +#define AD4695_TRIGGER_PIN_GP3 3 + #endif /* _DT_BINDINGS_ADI_AD4695_H */ |