[PATCH v5 0/3] Enable DW9714V camera focus coils on SHIFT 6MQ

[PATCH v5 0/3] Enable DW9714V camera focus coils on SHIFT 6MQ

[David Heidelberg via B4 Relay]

Implements wiring for:
 - SGM2036 linear regulator used to turn on the focus coils [1]
 - Dongwoon 9714V focus coil used by IMX519 camera sensor [2]
 - Dongwoon 9714V focus coil used by S5K2X7SP camera sensor

[1] https://www.sg-micro.com/rect/assets/efa85993-263c-41aa-9274-b488f59f85d5/SGM2036.pdf
[2] https://datasheet4u.com/pdf/1247146/DW9714V.pdf

Open question for future work: modeling the I2C bus supply.

Like many similar chips, the DW9714 has a single VDD supply, but its I2C
lines go through a level shifter to a 1.8V rail, and there is currently no
place in DT to describe that rail so it gets enabled during I2C access to
the device. As a stopgap, this series models it as an always-on, see the
comment in the vreg_lvs1a_1p8 node).

Direction agreed with Rob Herring and Mark Brown on IRC:

 - Modeling the level shifter itself is overkill as long as it is just a
   supply; modeling the connector would come first if needed.
 - Since each side of the shifter has its own supply, the proper solution
   is a generic 'bus-supply' property valid in both the I2C controller and
   device nodes.
 - Defining it per-device-schema would ideally use an I2C equivalent of
   spi-peripheral-props.yaml, which does not exist yet. The pragmatic
   interim is to define bus-supply in i2c-controller.yaml for both places
   and add 'bus-supply: true' to schemas that need it now (dw9714),
   deferring the peripheral-props question until more shared device
   properties accumulate.

Once bus-supply exists, the regulator-always-on workaround in this DTS can
be dropped.

Signed-off-by: David Heidelberg <david@ixit.cz>
---
Changes in v5:
- There is secondary rear camera with the same AF. Tested with the
  camera (not upstreamed yet).
- Verified the both rear cameras i2c addresses, added comment about it.
- Link to v4: https://patch.msgid.link/20260810-dw9714v-v4-0-a227cb1d29bd@ixit.cz

Changes in v4:
- Updated DT bindings commit description. (Sakari)
- Link to v3: https://patch.msgid.link/20260803-dw9714v-v3-0-8e10278dcd0d@ixit.cz

Changes in v3:
- Multiline compatible. (Konrad)
- Dropped output-low from avdd_cam pinctrl. (Konrad)
- Then dropped whole sleep pinctrl state, as it's same as default.
- Reworded the TODO. (Konrad)
- Dropped camss node. (claude)
- Moved before cdsp_pas (sort)
- Dropped unused regulator label.
- Switched the i2c bus shifter with the regulator VDD, as previously it
  was incorrectly wired and keep always-on on the i2c bus shifter.
- Link to v2: https://patch.msgid.link/20260730-dw9714v-v2-0-d5da19e6c60b@ixit.cz

Changes in v2:
- Address Sashiko findings.
- Link to v1: https://patch.msgid.link/20260729-dw9714v-v1-0-3c479b3cf8c0@ixit.cz

---
David Heidelberg (3):
      dt-bindings: media: i2c: dongwoon,dw9714: Document DW9714A and V variant
      arm64: dts: qcom: sdm845-shift-axolotl: Add actuator for main rear camera
      arm64: dts: qcom: sdm845-shift-axolotl: Add actuator for second rear camera

 .../bindings/media/i2c/dongwoon,dw9714.yaml        | 14 +++-
 arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts  | 89 ++++++++++++++++++++++
 2 files changed, 100 insertions(+), 3 deletions(-)
---
base-commit: 7079a12d7506b07fb53b54a664bfad5fa9b16d70
change-id: 20260416-dw9714v-4566465ebe7d

Best regards,
--  
David Heidelberg <david@ixit.cz>

[PATCH v5 1/3] dt-bindings: media: i2c: dongwoon,dw9714: Document DW9714A and V variant

[David Heidelberg via B4 Relay]

From: David Heidelberg <david@ixit.cz>

DW9714A is a successor of DW9714 and DW9714V is a successor of DW9714A.

All three are compatible in their normal mode: a 10-bit DAC with the same
Direct/LSC/DLC slew rate control. DW9714V additionally has an "advanced
mode", which exposes Smart Actuator Control (SAC2/SAC3/SAC3.5/SLSC) and
soft start/landing. Out of reset the DW9714V comes up in normal mode
with ringing control disabled, i.e. behaving as a plain DW9714,
so nothing has to be configured for it to work today.

Should SAC support be added later, it is board data rather than a userspace
knob: 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. Those properties are left out until there is driver support and
measured values.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 .../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 <krzk@kernel.org>
 
 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)
 

-- 
2.55.0

[PATCH v5 2/3] arm64: dts: qcom: sdm845-shift-axolotl: Add actuator for main rear camera

[David Heidelberg via B4 Relay]

From: David Heidelberg <david@ixit.cz>

Main rear camera uses Dongwoon DW9714V actuator. Add regulator and
actuator node.

Since the actuator sits on the CCI I2C bus, whose 1.8V side is fed by
vreg_lvs1a_1p8 and there is no place to describe that, keep it always-on
for now, until bus-supply exists.

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: David Heidelberg <david@ixit.cz>
---
 arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 50 +++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
index 1b0eaeafbd517..f14fe8e175e96 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
@@ -81,16 +81,34 @@ ramoops: ramoops@b0000000 {
 	battery: battery {
 		compatible = "simple-battery";
 
 		charge-full-design-microamp-hours = <3850000>;
 		voltage-min-design-microvolt = <3600000>;
 		voltage-max-design-microvolt = <4400000>;
 	};
 
+	/* SGM2036-2.8YUDH4G/TR */
+	cam_main_af_2p8: regulator-cam-main-af-2p8 {
+		compatible = "regulator-fixed";
+
+		regulator-name = "cam_main_af_2p8";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		regulator-enable-ramp-delay = <100>;
+
+		gpio = <&tlmm 8 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&cam_main_af_default_state>;
+		pinctrl-names = "default";
+
+		vin-supply = <&vreg_bob>;
+	};
+
 	vph_pwr: vph-pwr-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "vph_pwr";
 		regulator-min-microvolt = <3700000>;
 		regulator-max-microvolt = <3700000>;
 	};
 
 	vreg_s4a_1p8: pm8998-smps4 {
@@ -403,16 +421,23 @@ vreg_l28a_3p0: ldo28 {
 			regulator-min-microvolt = <2856000>;
 			regulator-max-microvolt = <3008000>;
 			regulator-initial-mode = <RPMH_REGULATOR_MODE_HPM>;
 		};
 
 		vreg_lvs1a_1p8: lvs1 {
 			regulator-min-microvolt = <1800000>;
 			regulator-max-microvolt = <1800000>;
+
+			/*
+			 * Supplies the 1.8V side of the CCI I2C level
+			 * shifter; keep enabled until a generic
+			 * bus-supply property exists.
+			 */
+			regulator-always-on;
 		};
 
 		vreg_lvs2a_1p8: lvs2 {
 			regulator-min-microvolt = <1800000>;
 			regulator-max-microvolt = <1800000>;
 		};
 	};
 
@@ -441,16 +466,34 @@ regulators-2 {
 
 		vreg_s3c_0p6: smps3 {
 			regulator-min-microvolt = <600000>;
 			regulator-max-microvolt = <600000>;
 		};
 	};
 };
 
+&cci {
+	status = "okay";
+};
+
+&cci_i2c0 {
+	/* sony,imx519 @ 1a */
+
+	/* rear camera actuator */
+	camera-lens@c {
+		compatible = "dongwoon,dw9714v",
+			     "dongwoon,dw9714a",
+			     "dongwoon,dw9714";
+		reg = <0x0c>;
+
+		vcc-supply = <&cam_main_af_2p8>;
+	};
+};
+
 &cdsp_pas {
 	firmware-name = "qcom/sdm845/SHIFT/axolotl/cdsp.mbn";
 
 	status = "okay";
 };
 
 &gcc {
 	protected-clocks = <GCC_QSPI_CORE_CLK>,
@@ -699,16 +742,23 @@ &slpi_pas {
 	firmware-name = "qcom/sdm845/SHIFT/axolotl/slpi.mbn";
 
 	status = "okay";
 };
 
 &tlmm {
 	gpio-reserved-ranges = <0 4>, <81 4>;
 
+	cam_main_af_default_state: cam-main-af-default-state {
+		pins = "gpio8";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	sdc2_default_state: sdc2-default-state {
 		clk-pins {
 			pins = "sdc2_clk";
 			drive-strength = <16>;
 			bias-disable;
 		};
 
 		cmd-pins {

-- 
2.55.0

[PATCH v5 3/3] arm64: dts: qcom: sdm845-shift-axolotl: Add actuator for second rear camera

[David Heidelberg via B4 Relay]

From: David Heidelberg <david@ixit.cz>

The SHIFT 6MQ has a second rear (auxiliary) camera. Its autofocus
actuator is a Dongwoon DW9714V.

Signed-off-by: David Heidelberg <david@ixit.cz>
---
 arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts | 39 +++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
index f14fe8e175e96..3cfc11127f5e1 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
+++ b/arch/arm64/boot/dts/qcom/sdm845-shift-axolotl.dts
@@ -99,16 +99,34 @@ cam_main_af_2p8: regulator-cam-main-af-2p8 {
 		enable-active-high;
 
 		pinctrl-0 = <&cam_main_af_default_state>;
 		pinctrl-names = "default";
 
 		vin-supply = <&vreg_bob>;
 	};
 
+	/* SGM2036-2.8YUDH4G/TR */
+	cam_rear2_af_2p8: regulator-cam-rear2-af-2p8 {
+		compatible = "regulator-fixed";
+
+		regulator-name = "cam_rear2_af_2p8";
+		regulator-min-microvolt = <2800000>;
+		regulator-max-microvolt = <2800000>;
+		regulator-enable-ramp-delay = <100>;
+
+		gpio = <&tlmm 76 GPIO_ACTIVE_HIGH>;
+		enable-active-high;
+
+		pinctrl-0 = <&cam_rear2_af_default_state>;
+		pinctrl-names = "default";
+
+		vin-supply = <&vreg_bob>;
+	};
+
 	vph_pwr: vph-pwr-regulator {
 		compatible = "regulator-fixed";
 		regulator-name = "vph_pwr";
 		regulator-min-microvolt = <3700000>;
 		regulator-max-microvolt = <3700000>;
 	};
 
 	vreg_s4a_1p8: pm8998-smps4 {
@@ -484,16 +502,30 @@ camera-lens@c {
 			     "dongwoon,dw9714a",
 			     "dongwoon,dw9714";
 		reg = <0x0c>;
 
 		vcc-supply = <&cam_main_af_2p8>;
 	};
 };
 
+&cci_i2c1 {
+	/* samsung,s5k2x7sp @ 10 */
+
+	/* 2nd rear camera actuator */
+	camera-lens@c {
+		compatible = "dongwoon,dw9714v",
+			     "dongwoon,dw9714a",
+			     "dongwoon,dw9714";
+		reg = <0x0c>;
+
+		vcc-supply = <&cam_rear2_af_2p8>;
+	};
+};
+
 &cdsp_pas {
 	firmware-name = "qcom/sdm845/SHIFT/axolotl/cdsp.mbn";
 
 	status = "okay";
 };
 
 &gcc {
 	protected-clocks = <GCC_QSPI_CORE_CLK>,
@@ -749,16 +781,23 @@ &tlmm {
 
 	cam_main_af_default_state: cam-main-af-default-state {
 		pins = "gpio8";
 		function = "gpio";
 		drive-strength = <2>;
 		bias-disable;
 	};
 
+	cam_rear2_af_default_state: cam-rear2-af-default-state {
+		pins = "gpio76";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	sdc2_default_state: sdc2-default-state {
 		clk-pins {
 			pins = "sdc2_clk";
 			drive-strength = <16>;
 			bias-disable;
 		};
 
 		cmd-pins {

-- 
2.55.0

Re: [PATCH v5 3/3] arm64: dts: qcom: sdm845-shift-axolotl: Add actuator for second rear camera

[Konrad Dybcio]

On 8/22/26 7:15 AM, David Heidelberg via B4 Relay wrote:
> From: David Heidelberg <david@ixit.cz>
> 
> The SHIFT 6MQ has a second rear (auxiliary) camera. Its autofocus
> actuator is a Dongwoon DW9714V.
> 
> Signed-off-by: David Heidelberg <david@ixit.cz>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad