drivers: haptics: drv2605: Hard codes open loop mode for LRA mode

Enables open loop operation when initializing into LRA mode. Open loop
operation is enabled by default for ERM mode. This is hard coded for LRA
mode because calibration is currently unsupported.

Signed-off-by: Ricardo Rivera-Matos <[email protected]>

Author: rriveramcrus

drivers/haptics/drv2605.c

@@ -90,6 +90,9 @@ LOG_MODULE_REGISTER(DRV2605, CONFIG_HAPTICS_LOG_LEVEL);
 #define DRV2605_LOOP_GAIN            GENMASK(3, 2)
 #define DRV2605_BEMF_GAIN            GENMASK(1, 0)
 
+#define DRV2605_ACTUATOR_MODE_ERM 0
+#define DRV2605_ACTUATOR_MODE_LRA 1
+
 #define DRV2605_REG_CONTROL1  0x1b
 #define DRV2605_STARTUP_BOOST BIT(7)
 #define DRV2605_AC_COUPLE     BIT(5)
@@ -467,6 +470,14 @@ static int drv2605_hw_config(const struct device *dev)
 		return ret;
 	}
 
+	if (config->actuator_mode == DRV2605_ACTUATOR_MODE_LRA) {
+		ret = i2c_reg_update_byte_dt(&config->i2c, DRV2605_REG_CONTROL3,
+					     DRV2605_LRA_OPEN_LOOP, DRV2605_LRA_OPEN_LOOP);
+		if (ret < 0) {
+			return ret;
+		}
+	}
+
 	return 0;
 }