sensor: testing: Update sensor emul backend

Update the backend for sensor emulators to include a function for
setting the offset as well as a function to query an attribute's
metadata such as bounds and increment size. Additionally, add
backend support for setting the _xyz channel values.

Make the appropriate test changes to accomodate.

Signed-off-by: Yuval Peress <peress@google.com>

drivers/i2c/i2c_emul.c

@@ -90,12 +90,15 @@ static int i2c_emul_transfer(const struct device *dev, struct i2c_msg *msgs, uin
 	__ASSERT_NO_MSG(emul->api);
 	__ASSERT_NO_MSG(emul->api->transfer);
 
-	ret = api->transfer(emul->target, msgs, num_msgs, addr);
-	if (ret) {
-		return ret;
+	if (emul->mock_api != NULL && emul->mock_api->transfer != NULL) {
+		ret = emul->mock_api->transfer(emul->target, msgs, num_msgs, addr);
+		printk("mock_api returned %d\n", ret);
+		if (ret != -ENOSYS) {
+			return ret;
+		}
 	}
 
-	return 0;
+	return api->transfer(emul->target, msgs, num_msgs, addr);
 }
 
 /**
@@ -125,7 +128,7 @@ int i2c_emul_register(const struct device *dev, struct i2c_emul *emul)
 
 	sys_slist_append(&data->emuls, &emul->node);
 
-	LOG_INF("Register emulator '%s' at I2C addr %02x\n", name, emul->addr);
+	LOG_INF("Register emulator '%s' at I2C addr %02x", name, emul->addr);
 
 	return 0;
 }

drivers/sensor/akm09918c/akm09918c_emul.c

@@ -134,7 +134,7 @@ static int akm09918c_emul_init(const struct emul *target, const struct device *p
 }
 
 static int akm09918c_emul_backend_set_channel(const struct emul *target, enum sensor_channel ch,
-					      q31_t value, int8_t shift)
+					      const q31_t *value, int8_t shift)
 {
 	if (!target || !target->data) {
 		return -EINVAL;
@@ -162,8 +162,9 @@ static int akm09918c_emul_backend_set_channel(const struct emul *target, enum se
 	data->reg[AKM09918C_REG_ST1] |= AKM09918C_ST1_DRDY;
 
 	/* Convert fixed-point Gauss values into microgauss and then into its bit representation */
-	int32_t microgauss = (shift < 0 ? ((int64_t)value >> -shift) : ((int64_t)value << shift)) *
-			     1000000 / ((int64_t)INT32_MAX + 1);
+	int32_t microgauss =
+		(shift < 0 ? ((int64_t)*value >> -shift) : ((int64_t)*value << shift)) * 1000000 /
+		((int64_t)INT32_MAX + 1);
 
 	int16_t reg_val =
 		CLAMP(microgauss, AKM09918C_MAGN_MIN_MICRO_GAUSS, AKM09918C_MAGN_MAX_MICRO_GAUSS) /

drivers/sensor/amd_sb_tsi/sb_tsi_emul.c

@@ -100,7 +100,7 @@ static int sb_tsi_emul_init(const struct emul *target, const struct device *pare
 }
 
 static int sb_tsi_emul_set_channel(const struct emul *target, enum sensor_channel chan,
-				   q31_t value, int8_t shift)
+				   const q31_t *value, int8_t shift)
 {
 	struct sb_tsi_emul_data *data = target->data;
 	int64_t scaled_value;
@@ -111,7 +111,7 @@ static int sb_tsi_emul_set_channel(const struct emul *target, enum sensor_channe
 		return -ENOTSUP;
 	}
 
-	scaled_value = (int64_t)value << shift;
+	scaled_value = (int64_t)*value << shift;
 	millicelsius = scaled_value * 1000 / ((int64_t)INT32_MAX + 1);
 	reg_value = CLAMP(millicelsius / 125, 0, 0x7ff);