addded override_reg to fg dts

Author: ejgoldik

hardware/realsense/tegra194-camera-d4xx-fg12-16ch-dual.dtsi

@@ -238,6 +238,7 @@
 					status = "ok";
 					def-addr = <0x10>;
 					reg = <0x1b>;
+					override_reg = <0x1a>;
 					compatible = "intel,d4xx";
 					vcc-supply = <&p2822_vdd_1v8_cvb>;
 					cam-type = "RGB";
@@ -284,6 +285,7 @@
 					status = "ok";
 					def-addr = <0x10>;
 					reg = <0x1c>;
+					override_reg = <0x1a>;
 					compatible = "intel,d4xx";
 					vcc-supply = <&p2822_vdd_1v8_cvb>;
 							cam-type = "Y8";
@@ -331,6 +333,7 @@
 					status = "ok";
 					def-addr = <0x10>;
 					reg = <0x1d>;
+					override_reg = <0x1a>;
 					compatible = "intel,d4xx";
 					vcc-supply = <&p2822_vdd_1v8_cvb>;
 							cam-type = "IMU";
@@ -444,6 +447,7 @@
 					status = "ok";
 					def-addr = <0x10>;
 					reg = <0x1b>;
+					override_reg = <0x1a>;
 					compatible = "intel,d4xx";
 					vcc-supply = <&p2822_vdd_1v8_cvb>;
 					cam-type = "RGB";
@@ -490,6 +494,7 @@
 					status = "ok";
 					def-addr = <0x10>;
 					reg = <0x1c>;
+					override_reg = <0x1a>;
 					compatible = "intel,d4xx";
 					vcc-supply = <&p2822_vdd_1v8_cvb>;
 							cam-type = "Y8";
@@ -537,6 +542,7 @@
 					status = "ok";
 					def-addr = <0x10>;
 					reg = <0x1d>;
+					override_reg = <0x1a>;
 					compatible = "intel,d4xx";
 					vcc-supply = <&p2822_vdd_1v8_cvb>;
 							cam-type = "IMU";

hardware/realsense/tegra194-camera-d4xx-fg12-16ch.dtsi

@@ -169,6 +169,7 @@
 					status = "ok";
 					def-addr = <0x10>;
 					reg = <0x1b>;
+					override_reg = <0x1a>;
 					compatible = "intel,d4xx";
 					vcc-supply = <&p2822_vdd_1v8_cvb>;
 					cam-type = "RGB";
@@ -215,6 +216,7 @@
 					status = "ok";
 					def-addr = <0x10>;
 					reg = <0x1c>;
+					override_reg = <0x1a>;
 					compatible = "intel,d4xx";
 					vcc-supply = <&p2822_vdd_1v8_cvb>;
 							cam-type = "Y8";
@@ -262,6 +264,7 @@
 					status = "ok";
 					def-addr = <0x10>;
 					reg = <0x1d>;
+					override_reg = <0x1a>;
 					compatible = "intel,d4xx";
 					vcc-supply = <&p2822_vdd_1v8_cvb>;
 							cam-type = "IMU";

kernel/realsense/d4xx_max96712.c

@@ -5085,6 +5085,7 @@ static int ds5_probe(struct i2c_client *c, const struct i2c_device_id *id)
 	int ret, retry, err = 0;
 #ifdef CONFIG_OF
 	const char *str;
+	uint32_t override_addr = 0;
 #endif
 	if (!state)
 		return -ENOMEM;
@@ -5093,9 +5094,14 @@ static int ds5_probe(struct i2c_client *c, const struct i2c_device_id *id)
 
 	state->client = c;
 	dev_warn(&c->dev, "Probing driver for D4xx\n");
-	// Alias all addresses to 0x1a
-	c->addr = DS5_FIXED_REG_ADDR;
-
+#ifdef CONFIG_OF
+	ret = of_property_read_u32(c->dev.of_node, "override_reg", &override_addr);
+	if (!ret) {
+		// Override probed address
+		dev_dbg(&c->dev, "Using override addr %u\n", override_addr);
+		c->addr = override_addr;
+	}
+#endif
 	state->variant = ds5_variants + id->driver_data;
 #ifdef CONFIG_OF
 	state->vcc = devm_regulator_get(&c->dev, "vcc");