drivers: haptics: drv2605: Pick up property defaults from DT

Adds the default value for the existing properties to the device tree
and fall back on those values at initialization if necessary.

(cherry picked from commit 857b9df)

Original-Signed-off-by: Ricardo Rivera-Matos <rriveram@opensource.cirrus.com>
GitOrigin-RevId: 857b9df
Cr-Build-Id: 8739001010820476625
Cr-Build-Url: https://cr-buildbucket.appspot.com/build/8739001010820476625
Copybot-Job-Name: zephyr-main-copybot-downstream
Change-Id: I130e00f1fc267390ccf35b98f2509fbb2d93dff8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/5803442
Tested-by: ChromeOS Prod (Robot) <chromeos-ci-prod@chromeos-bot.iam.gserviceaccount.com>
Reviewed-by: Eric Yilun Lin <yllin@google.com>
Tested-by: Eric Yilun Lin <yllin@google.com>
Commit-Queue: Eric Yilun Lin <yllin@google.com>

drivers/haptics/drv2605.c

@@ -597,9 +597,9 @@ static const struct haptics_driver_api drv2605_driver_api = {
 		.i2c = I2C_DT_SPEC_INST_GET(inst),                                                 \
 		.en_gpio = GPIO_DT_SPEC_INST_GET_OR(inst, en_gpios, {}),                           \
 		.in_trig_gpio = GPIO_DT_SPEC_INST_GET_OR(inst, in_trig_gpios, {}),                 \
-		.feedback_brake_factor = DT_INST_ENUM_IDX_OR(inst, feedback_brake_factor, 3),      \
-		.loop_gain = DT_INST_ENUM_IDX_OR(inst, loop_gain, 2),                              \
-		.actuator_mode = DT_INST_ENUM_IDX_OR(inst, actuator_mode, 0),                      \
+		.feedback_brake_factor = DT_INST_ENUM_IDX(inst, feedback_brake_factor),            \
+		.loop_gain = DT_INST_ENUM_IDX(inst, loop_gain),                                    \
+		.actuator_mode = DT_INST_ENUM_IDX(inst, actuator_mode),                            \
 	};                                                                                         \
                                                                                                    \
 	static struct drv2605_data drv2605_data_##inst = {                                         \

dts/bindings/haptics/ti,drv2605.yaml

@@ -27,13 +27,22 @@ properties:
       - "8X"
       - "16X"
       - "DISABLED"
+    default: "3X"
+    description: |
+      Selects the feedback gain ratio between braking gain and driving gain.
+      According to the datasheet, a value of 2 ("3X") is valid for most
+      actuators.
   loop-gain:
     type: string
     enum:
       - "LOW"
       - "MEDIUM"
       - "HIGH"
       - "VERY_HIGH"
+    default: "HIGH"
+    description: |
+      Selects a loop gain for the feedback control. According to the datasheet,
+      a value of 2 ("HIGH") is valid for most actuators.
   en-gpios:
     type: phandle-array
     description: GPIO to enable and disable the device.