On 10/08/2026 11:38, Sakari Ailus wrote:
Hi David,
On Mon, Aug 03, 2026 at 11:50:25AM +0200, David Heidelberg via B4 Relay wrote:
From: David Heidelberg <[email protected]>
DW9714A is successor of DW9714 and DW9714V is successor of the DW9714A.
All actuators are backward compatible, but they do introduce new features,
such as Smart Actuator Control (SAC) mode which can minimize the
mechanical vibration and achieve very fast mechanical settling time.
Support for SAC can be implemented in the future.
What kind of configuration does SAC require? Such things generally aren't
configured from the userspace, compare e.g. with the dw9719 bindings
discussion.
I don't have extra deep insight (except basic how the sensor works).
By default all dw9714* sensors starts in the default "legacy" mode.
The clanker after looking at datasheets and kernel struct produced, if it make
sense:
the mode and the vibration period (SAC_CFG/PRESC/SACT) have to match
the mechanical tVIB of the actuator and lens assembly of the given camera
module, the same way dongwoon,aac-mode/aac-timing/clock-presc do for
dongwoon,dw9768 and dongwoon,sac-mode/vcm-prescale for dongwoon,dw9719.
Those properties are left out until there is driver support and measured
values; note the DW9714V mode set differs from DW9719's, so its enum cannot
be reused as is.
David
Nit: fix typo in description by removing duplicate information.
Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: David Heidelberg <[email protected]>
---
.../devicetree/bindings/media/i2c/dongwoon,dw9714.yaml | 14 +++++++++++---
1 file changed, 11 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/media/i2c/dongwoon,dw9714.yaml
b/Documentation/devicetree/bindings/media/i2c/dongwoon,dw9714.yaml
index 66229a3dc05d6..7c2769e6c4880 100644
--- a/Documentation/devicetree/bindings/media/i2c/dongwoon,dw9714.yaml
+++ b/Documentation/devicetree/bindings/media/i2c/dongwoon,dw9714.yaml
@@ -5,22 +5,30 @@ $id:
http://devicetree.org/schemas/media/i2c/dongwoon,dw9714.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: Dongwoon Anatech DW9714 camera voice coil lens driver
maintainers:
- Krzysztof Kozlowski <[email protected]>
description:
- DW9174 is a 10-bit DAC with current sink capability. It is intended for
- driving voice coil lenses in camera modules.
+ 10-bit DAC with current sink capability. It is intended for driving
+ voice coil lenses in camera modules.
properties:
compatible:
- const: dongwoon,dw9714
+ oneOf:
+ - items:
+ - const: dongwoon,dw9714v
+ - const: dongwoon,dw9714a
+ - const: dongwoon,dw9714
+ - items:
+ - const: dongwoon,dw9714a
+ - const: dongwoon,dw9714
+ - const: dongwoon,dw9714
reg:
maxItems: 1
powerdown-gpios:
description:
XSD pin for shutdown (active low)
--
David Heidelberg
