From: Segwon <segwon.han@samsung.com>
Date: Tue, 14 Nov 2017 11:22:09 +0000 (+0900)
Subject: [5/6] fd passing: remove unnecessary gdbus functions.
X-Git-Tag: submit/tizen_4.0/20171220.125806^2~29
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bbbec795a3b6a1def61758f532a3f3133d32a116;p=platform%2Fcore%2Fapi%2Fperipheral-io.git

[5/6] fd passing: remove unnecessary gdbus functions.

Change-Id: Ic2c0ae84608851344191606101dcef82df3786de
Signed-off-by: Segwon <segwon.han@samsung.com>
---

diff --git a/include/gdbus/peripheral_gdbus_gpio.h b/include/gdbus/peripheral_gdbus_gpio.h
index 39c67c5..f9e35e6 100644
--- a/include/gdbus/peripheral_gdbus_gpio.h
+++ b/include/gdbus/peripheral_gdbus_gpio.h
@@ -22,11 +22,5 @@ void gpio_proxy_deinit(void);
 
 int peripheral_gdbus_gpio_open(peripheral_gpio_h gpio);
 int peripheral_gdbus_gpio_close(peripheral_gpio_h gpio);
-int peripheral_gdbus_gpio_set_direction(peripheral_gpio_h gpio, peripheral_gpio_direction_e direction);
-int peripheral_gdbus_gpio_set_edge_mode(peripheral_gpio_h gpio, peripheral_gpio_edge_e edge);
-int peripheral_gdbus_gpio_set_interrupted_cb(peripheral_gpio_h gpio, peripheral_gpio_interrupted_cb callback, void *user_data);
-int peripheral_gdbus_gpio_unset_interrupted_cb(peripheral_gpio_h gpio);
-int peripheral_gdbus_gpio_read(peripheral_gpio_h gpio, int *value);
-int peripheral_gdbus_gpio_write(peripheral_gpio_h gpio, int value);
 
 #endif /* __PERIPHERAL_GDBUS_GPIO_H__ */
diff --git a/include/gdbus/peripheral_gdbus_i2c.h b/include/gdbus/peripheral_gdbus_i2c.h
index 7b2b899..30604c7 100644
--- a/include/gdbus/peripheral_gdbus_i2c.h
+++ b/include/gdbus/peripheral_gdbus_i2c.h
@@ -22,8 +22,5 @@ void i2c_proxy_deinit(void);
 
 int peripheral_gdbus_i2c_open(peripheral_i2c_h i2c, int bus, int address);
 int peripheral_gdbus_i2c_close(peripheral_i2c_h i2c);
-int peripheral_gdbus_i2c_read(peripheral_i2c_h i2c, uint8_t *data, int length);
-int peripheral_gdbus_i2c_write(peripheral_i2c_h i2c, uint8_t *data, int length);
-int peripheral_gdbus_i2c_smbus_ioctl(peripheral_i2c_h i2c, uint8_t read_write, uint8_t command, uint32_t size, uint16_t data_in, uint16_t *data_out);
 
 #endif /* __PERIPHERAL_GDBUS_I2C_H__ */
diff --git a/include/gdbus/peripheral_gdbus_pwm.h b/include/gdbus/peripheral_gdbus_pwm.h
index f6d4c1c..0ce6159 100644
--- a/include/gdbus/peripheral_gdbus_pwm.h
+++ b/include/gdbus/peripheral_gdbus_pwm.h
@@ -22,9 +22,5 @@ void pwm_proxy_deinit(void);
 
 int peripheral_gdbus_pwm_open(peripheral_pwm_h pwm, int chip, int pin);
 int peripheral_gdbus_pwm_close(peripheral_pwm_h pwm);
-int peripheral_gdbus_pwm_set_period(peripheral_pwm_h pwm, int period);
-int peripheral_gdbus_pwm_set_duty_cycle(peripheral_pwm_h pwm, int duty_cycle_ns);
-int peripheral_gdbus_pwm_set_polarity(peripheral_pwm_h pwm, peripheral_pwm_polarity_e polarity);
-int peripheral_gdbus_pwm_set_enable(peripheral_pwm_h pwm, bool enable);
 
 #endif /* __PERIPHERAL_GDBUS_PWM_H__ */
diff --git a/include/gdbus/peripheral_gdbus_spi.h b/include/gdbus/peripheral_gdbus_spi.h
index 7ab743a..d6be9b5 100644
--- a/include/gdbus/peripheral_gdbus_spi.h
+++ b/include/gdbus/peripheral_gdbus_spi.h
@@ -21,12 +21,5 @@ void spi_proxy_deinit();
 
 int peripheral_gdbus_spi_open(peripheral_spi_h spi, int bus, int cs);
 int peripheral_gdbus_spi_close(peripheral_spi_h spi);
-int peripheral_gdbus_spi_set_mode(peripheral_spi_h spi, peripheral_spi_mode_e mode);
-int peripheral_gdbus_spi_set_bit_order(peripheral_spi_h spi, bool lsb);
-int peripheral_gdbus_spi_set_bits_per_word(peripheral_spi_h spi, unsigned char bits);
-int peripheral_gdbus_spi_set_frequency(peripheral_spi_h spi, unsigned int freq_hz);
-int peripheral_gdbus_spi_read(peripheral_spi_h spi, unsigned char *data, int length);
-int peripheral_gdbus_spi_write(peripheral_spi_h spi, unsigned char *data, int length);
-int peripheral_gdbus_spi_transfer(peripheral_spi_h spi, unsigned char *tx_data, unsigned char *rx_data, int length);
 
 #endif /* __PERIPHERAL_GDBUS_SPI_H_ */
diff --git a/include/gdbus/peripheral_gdbus_uart.h b/include/gdbus/peripheral_gdbus_uart.h
index 15b5d06..d19440c 100644
--- a/include/gdbus/peripheral_gdbus_uart.h
+++ b/include/gdbus/peripheral_gdbus_uart.h
@@ -21,12 +21,5 @@ void uart_proxy_deinit();
 
 int peripheral_gdbus_uart_open(peripheral_uart_h uart, int port);
 int peripheral_gdbus_uart_close(peripheral_uart_h uart);
-int peripheral_gdbus_uart_set_baud_rate(peripheral_uart_h uart, peripheral_uart_baud_rate_e baud);
-int peripheral_gdbus_uart_set_byte_size(peripheral_uart_h uart, peripheral_uart_byte_size_e byte_size);
-int peripheral_gdbus_uart_set_parity(peripheral_uart_h uart, peripheral_uart_parity_e parity);
-int peripheral_gdbus_uart_set_stop_bits(peripheral_uart_h uart, peripheral_uart_stop_bits_e stop_bits);
-int peripheral_gdbus_uart_set_flow_control(peripheral_uart_h uart, bool xonxoff, bool rtscts);
-int peripheral_gdbus_uart_read(peripheral_uart_h uart, uint8_t *data, int length);
-int peripheral_gdbus_uart_write(peripheral_uart_h uart, uint8_t *data, int length);
 
 #endif /* __PERIPHERAL_GDBUS_UART_H_ */
diff --git a/src/gdbus/peripheral_gdbus_gpio.c b/src/gdbus/peripheral_gdbus_gpio.c
index 52fce3e..17a7f2f 100644
--- a/src/gdbus/peripheral_gdbus_gpio.c
+++ b/src/gdbus/peripheral_gdbus_gpio.c
@@ -28,19 +28,8 @@
 #define GPIO_FD_INDEX_EDGE      1
 #define GPIO_FD_INDEX_VALUE     2
 
-extern int peripheral_gpio_interrupted_cb_handler(int pin, int value, unsigned long long timestamp, int err);
-
 static PeripheralIoGdbusGpio *gpio_proxy = NULL;
 
-static void __peripheral_gpio_interrupted_cb(PeripheralIoGdbusGpio *gpio, gint pin, gint value, guint64 timestamp, gpointer user_data)
-{
-	int err = PERIPHERAL_ERROR_NONE;
-	if (!gpio)
-		err = PERIPHERAL_ERROR_IO_ERROR;
-
-	peripheral_gpio_interrupted_cb_handler(pin, value, timestamp, err);
-}
-
 void gpio_proxy_init(void)
 {
 	GError *error = NULL;
@@ -62,11 +51,6 @@ void gpio_proxy_init(void)
 		g_error_free(error);
 		return;
 	}
-
-	g_signal_connect(gpio_proxy,
-			"interrupted-cb",
-			G_CALLBACK(__peripheral_gpio_interrupted_cb),
-			NULL);
 }
 
 void gpio_proxy_deinit()
@@ -145,134 +129,4 @@ int peripheral_gdbus_gpio_close(peripheral_gpio_h gpio)
 	}
 
 	return ret;
-}
-
-int peripheral_gdbus_gpio_set_direction(peripheral_gpio_h gpio, peripheral_gpio_direction_e direction)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (gpio_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_gpio_call_set_direction_sync(
-			gpio_proxy,
-			gpio->handle,
-			direction,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_gpio_set_edge_mode(peripheral_gpio_h gpio, peripheral_gpio_edge_e edge)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (gpio_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_gpio_call_set_edge_mode_sync(
-			gpio_proxy,
-			gpio->handle,
-			edge,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_gpio_set_interrupted_cb(peripheral_gpio_h gpio, peripheral_gpio_interrupted_cb callback, void *user_data)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (gpio_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_gpio_call_set_interrupted_cb_sync(
-			gpio_proxy,
-			gpio->handle,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_gpio_unset_interrupted_cb(peripheral_gpio_h gpio)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (gpio_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_gpio_call_unset_interrupted_cb_sync(
-			gpio_proxy,
-			gpio->handle,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_gpio_read(peripheral_gpio_h gpio, int *value)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (gpio_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_gpio_call_read_sync(
-			gpio_proxy,
-			gpio->handle,
-			value,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_gpio_write(peripheral_gpio_h gpio, int value)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (gpio_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_gpio_call_write_sync(
-			gpio_proxy,
-			gpio->handle,
-			value,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
+}
\ No newline at end of file
diff --git a/src/gdbus/peripheral_gdbus_i2c.c b/src/gdbus/peripheral_gdbus_i2c.c
index a3290ab..63fda68 100644
--- a/src/gdbus/peripheral_gdbus_i2c.c
+++ b/src/gdbus/peripheral_gdbus_i2c.c
@@ -109,100 +109,4 @@ int peripheral_gdbus_i2c_close(peripheral_i2c_h i2c)
 	}
 
 	return ret;
-}
-
-int peripheral_gdbus_i2c_read(peripheral_i2c_h i2c, uint8_t *data, int length)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-	GVariant *data_array;
-	GVariantIter *iter;
-	guint8 str;
-	int i = 0;
-
-	if (i2c_proxy == NULL || data == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_i2c_call_read_sync(
-			i2c_proxy,
-			i2c->handle,
-			length,
-			&data_array,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	g_variant_get(data_array, "a(y)", &iter);
-	while (g_variant_iter_loop(iter, "(y)", &str)) {
-		data[i] = str;
-		if (i++ == length) break;
-	}
-	g_variant_iter_free(iter);
-	g_variant_unref(data_array);
-
-	return ret;
-}
-
-int peripheral_gdbus_i2c_write(peripheral_i2c_h i2c, uint8_t *data, int length)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-	GVariantBuilder *builder;
-	GVariant *g_data;
-	int i = 0;
-
-	if (i2c_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	builder = g_variant_builder_new(G_VARIANT_TYPE("a(y)"));
-
-	for (i = 0; i < length; i++)
-		g_variant_builder_add(builder, "(y)", data[i]);
-	g_variant_builder_add(builder, "(y)", 0x00);
-
-	g_data = g_variant_new("a(y)", builder);
-	g_variant_builder_unref(builder);
-
-	if (peripheral_io_gdbus_i2c_call_write_sync(
-			i2c_proxy,
-			i2c->handle,
-			length,
-			g_data,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_i2c_smbus_ioctl(peripheral_i2c_h i2c, uint8_t read_write, uint8_t command, uint32_t size, uint16_t data_in, uint16_t *data_out)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (i2c_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_i2c_call_smbus_ioctl_sync(
-			i2c_proxy,
-			i2c->handle,
-			read_write,
-			command,
-			size,
-			data_in,
-			data_out,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
+}
\ No newline at end of file
diff --git a/src/gdbus/peripheral_gdbus_pwm.c b/src/gdbus/peripheral_gdbus_pwm.c
index 1eb3435..f512e2c 100644
--- a/src/gdbus/peripheral_gdbus_pwm.c
+++ b/src/gdbus/peripheral_gdbus_pwm.c
@@ -133,92 +133,4 @@ int peripheral_gdbus_pwm_close(peripheral_pwm_h pwm)
 	}
 
 	return ret;
-}
-
-int peripheral_gdbus_pwm_set_period(peripheral_pwm_h pwm, int period)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (pwm_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_pwm_call_set_period_sync(
-			pwm_proxy,
-			pwm->handle,
-			period,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("%s", error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_pwm_set_duty_cycle(peripheral_pwm_h pwm, int duty_cycle_ns)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (pwm_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_pwm_call_set_duty_cycle_sync(
-			pwm_proxy,
-			pwm->handle,
-			duty_cycle_ns,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("%s", error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_pwm_set_polarity(peripheral_pwm_h pwm, peripheral_pwm_polarity_e polarity)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (pwm_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_pwm_call_set_polarity_sync(
-			pwm_proxy,
-			pwm->handle,
-			polarity,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("%s", error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_pwm_set_enable(peripheral_pwm_h pwm, bool enable)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (pwm_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_pwm_call_set_enable_sync(
-			pwm_proxy,
-			pwm->handle,
-			enable,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("%s", error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
+}
\ No newline at end of file
diff --git a/src/gdbus/peripheral_gdbus_spi.c b/src/gdbus/peripheral_gdbus_spi.c
index 2959835..e286f40 100644
--- a/src/gdbus/peripheral_gdbus_spi.c
+++ b/src/gdbus/peripheral_gdbus_spi.c
@@ -109,210 +109,4 @@ int peripheral_gdbus_spi_close(peripheral_spi_h spi)
 	}
 
 	return ret;
-}
-
-int peripheral_gdbus_spi_set_mode(peripheral_spi_h spi, peripheral_spi_mode_e mode)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (spi_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_spi_call_set_mode_sync(
-			spi_proxy,
-			spi->handle,
-			(guchar)mode,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("%s", error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_spi_set_bit_order(peripheral_spi_h spi, bool lsb)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (spi_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_spi_call_set_bit_order_sync(
-			spi_proxy,
-			spi->handle,
-			lsb,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("%s", error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_spi_set_bits_per_word(peripheral_spi_h spi, unsigned char bits)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (spi_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_spi_call_set_bits_per_word_sync(
-			spi_proxy,
-			spi->handle,
-			bits,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("%s", error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_spi_set_frequency(peripheral_spi_h spi, unsigned int freq_hz)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-
-	if (spi_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_spi_call_set_frequency_sync(
-			spi_proxy,
-			spi->handle,
-			freq_hz,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("%s", error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_spi_read(peripheral_spi_h spi, unsigned char *data, int length)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-	GVariant *data_array;
-	GVariantIter *iter;
-	guint8 str;
-	int i = 0;
-
-	if (spi_proxy == NULL || data == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_spi_call_read_sync(
-			spi_proxy,
-			spi->handle,
-			length,
-			&data_array,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("%s", error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	g_variant_get(data_array, "a(y)", &iter);
-	while (g_variant_iter_loop(iter, "(y)", &str)) {
-		data[i] = str;
-		if (i++ == length) break;
-	}
-	g_variant_iter_free(iter);
-	g_variant_unref(data_array);
-
-	return ret;
-}
-
-int peripheral_gdbus_spi_write(peripheral_spi_h spi, unsigned char *data, int length)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-	GVariantBuilder *builder;
-	GVariant *data_array;
-	int i = 0;
-
-	if (spi_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	builder = g_variant_builder_new(G_VARIANT_TYPE("a(y)"));
-
-	for (i = 0; i < length; i++)
-		g_variant_builder_add(builder, "(y)", data[i]);
-	g_variant_builder_add(builder, "(y)", 0x00);
-
-	data_array = g_variant_new("a(y)", builder);
-	g_variant_builder_unref(builder);
-
-	if (peripheral_io_gdbus_spi_call_write_sync(
-			spi_proxy,
-			spi->handle,
-			length,
-			data_array,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("%s", error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_spi_transfer(peripheral_spi_h spi, unsigned char *tx_data, unsigned char *rx_data, int length)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-	GVariantBuilder *builder;
-	GVariant *rx_data_array;
-	GVariant *tx_data_array;
-	GVariantIter *iter;
-	guint8 str;
-	int i = 0;
-
-	if (spi_proxy == NULL || !rx_data || !tx_data) return PERIPHERAL_ERROR_UNKNOWN;
-
-	builder = g_variant_builder_new(G_VARIANT_TYPE("a(y)"));
-
-	for (i = 0; i < length; i++)
-		g_variant_builder_add(builder, "(y)", tx_data[i]);
-	g_variant_builder_add(builder, "(y)", 0x00);
-
-	tx_data_array = g_variant_new("a(y)", builder);
-	g_variant_builder_unref(builder);
-
-	if (peripheral_io_gdbus_spi_call_transfer_sync(
-			spi_proxy,
-			spi->handle,
-			length,
-			tx_data_array,
-			&rx_data_array,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("%s", error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	i = 0;
-	g_variant_get(rx_data_array, "a(y)", &iter);
-	while (g_variant_iter_loop(iter, "(y)", &str)) {
-		rx_data[i] = str;
-		if (i++ == length) break;
-	}
-	g_variant_iter_free(iter);
-	g_variant_unref(rx_data_array);
-
-	return ret;
-}
+}
\ No newline at end of file
diff --git a/src/gdbus/peripheral_gdbus_uart.c b/src/gdbus/peripheral_gdbus_uart.c
index e7e57b6..16111dd 100644
--- a/src/gdbus/peripheral_gdbus_uart.c
+++ b/src/gdbus/peripheral_gdbus_uart.c
@@ -108,185 +108,4 @@ int peripheral_gdbus_uart_close(peripheral_uart_h uart)
 	}
 
 	return ret;
-}
-
-int peripheral_gdbus_uart_set_baud_rate(peripheral_uart_h uart, peripheral_uart_baud_rate_e baud)
-{
-	GError *error = NULL;
-	gint32 ret = PERIPHERAL_ERROR_NONE;
-
-	if (uart_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_uart_call_set_baud_rate_sync(
-			uart_proxy,
-			uart->handle,
-			baud,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_uart_set_byte_size(peripheral_uart_h uart, peripheral_uart_byte_size_e byte_size)
-{
-	GError *error = NULL;
-	gint32 ret = PERIPHERAL_ERROR_NONE;
-
-	if (uart_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_uart_call_set_byte_size_sync(
-			uart_proxy,
-			uart->handle,
-			byte_size,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_uart_set_parity(peripheral_uart_h uart, peripheral_uart_parity_e parity)
-{
-	GError *error = NULL;
-	gint32 ret = PERIPHERAL_ERROR_NONE;
-
-	if (uart_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_uart_call_set_parity_sync(
-			uart_proxy,
-			uart->handle,
-			parity,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_uart_set_stop_bits(peripheral_uart_h uart, peripheral_uart_stop_bits_e stop_bits)
-{
-	GError *error = NULL;
-	gint32 ret = PERIPHERAL_ERROR_NONE;
-
-	if (uart_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_uart_call_set_stop_bits_sync(
-			uart_proxy,
-			uart->handle,
-			stop_bits,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_uart_set_flow_control(peripheral_uart_h uart, bool xonxoff, bool rtscts)
-{
-	GError *error = NULL;
-	gint32 ret = PERIPHERAL_ERROR_NONE;
-
-	if (uart_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_uart_call_set_flow_control_sync(
-			uart_proxy,
-			uart->handle,
-			xonxoff,
-			rtscts,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
-
-int peripheral_gdbus_uart_read(peripheral_uart_h uart, uint8_t *data, int length)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-	GVariant *data_array;
-	GVariantIter *iter;
-	guint8 str;
-	int i = 0;
-
-	if (uart_proxy == NULL || data == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	if (peripheral_io_gdbus_uart_call_read_sync(
-			uart_proxy,
-			uart->handle,
-			length,
-			&data_array,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	g_variant_get(data_array, "a(y)", &iter);
-	while (g_variant_iter_loop(iter, "(y)", &str)) {
-		data[i] = str;
-		if (i++ == length) break;
-	}
-	g_variant_iter_free(iter);
-	g_variant_unref(data_array);
-
-	return ret;
-}
-
-int peripheral_gdbus_uart_write(peripheral_uart_h uart, uint8_t *data, int length)
-{
-	GError *error = NULL;
-	peripheral_error_e ret = PERIPHERAL_ERROR_NONE;
-	GVariantBuilder *builder;
-	GVariant *g_data;
-	int i = 0;
-
-	if (uart_proxy == NULL) return PERIPHERAL_ERROR_UNKNOWN;
-
-	builder = g_variant_builder_new(G_VARIANT_TYPE("a(y)"));
-
-	for (i = 0; i < length; i++)
-		g_variant_builder_add(builder, "(y)", data[i]);
-	g_variant_builder_add(builder, "(y)", 0x00);
-
-	g_data = g_variant_new("a(y)", builder);
-	g_variant_builder_unref(builder);
-
-	if (peripheral_io_gdbus_uart_call_write_sync(
-			uart_proxy,
-			uart->handle,
-			length,
-			g_data,
-			&ret,
-			NULL,
-			&error) == FALSE) {
-		_E("Error in %s() : %s", __func__, error->message);
-		g_error_free(error);
-		return PERIPHERAL_ERROR_UNKNOWN;
-	}
-
-	return ret;
-}
+}
\ No newline at end of file
diff --git a/src/gdbus/peripheral_io.xml b/src/gdbus/peripheral_io.xml
index 30ceaa6..00c49e7 100644
--- a/src/gdbus/peripheral_io.xml
+++ b/src/gdbus/peripheral_io.xml
@@ -11,39 +11,6 @@
 			<arg type="u" name="handle" direction="in"/>
 			<arg type="i" name="result" direction="out"/>
 		</method>
-		<method name="SetDirection">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="direction" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetEdgeMode">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="edge" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetInterruptedCb">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="UnsetInterruptedCb">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<signal name="InterruptedCb">
-			<arg type="i" name="pin"/>
-			<arg type="i" name="value"/>
-			<arg type="t" name="timestamp"/>
-		</signal>
-		<method name="Read">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="value" direction="out"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="Write">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="value" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
 	</interface>
 	<interface name="org.tizen.peripheral_io.i2c">
 		<method name="Open">
@@ -57,31 +24,6 @@
 			<arg type="u" name="handle" direction="in"/>
 			<arg type="i" name="result" direction="out"/>
 		</method>
-		<method name="Read">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="length" direction="in"/>
-			<arg type="a(y)" name="data" direction="out">
-				<annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
-			</arg>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="Write">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="length" direction="in"/>
-			<arg type="a(y)" name="data" direction="in">
-				<annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
-			</arg>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SmbusIoctl">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="y" name="read_write" direction="in"/>
-			<arg type="y" name="command" direction="in"/>
-			<arg type="u" name="size" direction="in"/>
-			<arg type="q" name="data_in" direction="in"/>
-			<arg type="q" name="data_out" direction="out"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
 	</interface>
 	<interface name="org.tizen.peripheral_io.pwm">
 		<method name="Open">
@@ -95,26 +37,6 @@
 			<arg type="u" name="handle" direction="in"/>
 			<arg type="i" name="result" direction="out"/>
 		</method>
-		<method name="SetPeriod">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="period" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetDutyCycle">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="duty_cycle" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetPolarity">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="polarity" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetEnable">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="b" name="enable" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
 	</interface>
 	<interface name="org.tizen.peripheral_io.uart">
 		<method name="Open">
@@ -127,48 +49,6 @@
 			<arg type="u" name="handle" direction="in"/>
 			<arg type="i" name="result" direction="out"/>
 		</method>
-		<method name="SetBaudRate">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="u" name="baudrate" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetByteSize">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="u" name="byte_size" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetParity">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="u" name="parity" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetStopBits">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="u" name="stop_bits" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetFlowControl">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="b" name="xonxoff" direction="in"/>
-			<arg type="b" name="rtscts" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="Read">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="length" direction="in"/>
-			<arg type="a(y)" name="data" direction="out">
-				<annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
-			</arg>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="Write">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="length" direction="in"/>
-			<arg type="a(y)" name="data" direction="in">
-				<annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
-			</arg>
-			<arg type="i" name="result" direction="out"/>
-		</method>
 	</interface>
 	<interface name="org.tizen.peripheral_io.spi">
 		<method name="Open">
@@ -182,52 +62,5 @@
 			<arg type="u" name="handle" direction="in"/>
 			<arg type="i" name="result" direction="out"/>
 		</method>
-		<method name="SetMode">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="y" name="mode" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetBitOrder">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="b" name="lsb" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetBitsPerWord">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="y" name="bits" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="SetFrequency">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="u" name="freq" direction="in"/>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="Read">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="length" direction="in"/>
-			<arg type="a(y)" name="data" direction="out">
-				<annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
-			</arg>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="Write">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="length" direction="in"/>
-			<arg type="a(y)" name="data" direction="in">
-				<annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
-			</arg>
-			<arg type="i" name="result" direction="out"/>
-		</method>
-		<method name="Transfer">
-			<arg type="u" name="handle" direction="in"/>
-			<arg type="i" name="length" direction="in"/>
-			<arg type="a(y)" name="tx_data" direction="in">
-				<annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
-			</arg>
-			<arg type="a(y)" name="rx_data" direction="out">
-				<annotation name="org.gtk.GDBus.C.ForceGVariant" value="true"/>
-			</arg>
-			<arg type="i" name="result" direction="out"/>
-		</method>
 	</interface>
 </node>
diff --git a/src/peripheral_gpio.c b/src/peripheral_gpio.c
index c80e9c9..a66cbaa 100644
--- a/src/peripheral_gpio.c
+++ b/src/peripheral_gpio.c
@@ -48,87 +48,6 @@ static bool __is_feature_supported()
 	return (gpio_feature == GPIO_FEATURE_TRUE ? true : false);
 }
 
-typedef struct {
-	peripheral_gpio_h handle;
-	peripheral_gpio_interrupted_cb callback;
-	void *user_data;
-} interrupted_cb_info_s;
-
-static GList *interrupted_cb_info_list = NULL;
-
-int peripheral_gpio_interrupted_cb_handler(int pin, int value, unsigned long long timestamp, int error)
-{
-	GList *link;
-	interrupted_cb_info_s *cb_info;
-
-	link = interrupted_cb_info_list;
-	while (link) {
-		cb_info = (interrupted_cb_info_s*)link->data;
-		if (cb_info->handle->pin == pin) {
-			if (cb_info->callback)
-				cb_info->callback(cb_info->handle, error, cb_info->user_data);
-			return PERIPHERAL_ERROR_NONE;
-		}
-		link = g_list_next(link);
-	}
-
-	return PERIPHERAL_ERROR_NONE;
-}
-
-static int __interrupted_cb_info_list_append(peripheral_gpio_h gpio, peripheral_gpio_interrupted_cb callback, void *user_data)
-{
-	GList *link;
-	interrupted_cb_info_s *cb_info = NULL;
-
-	link = interrupted_cb_info_list;
-	while (link) {
-		interrupted_cb_info_s *tmp;
-		tmp = (interrupted_cb_info_s*)link->data;
-		if (tmp->handle == gpio) {
-			cb_info = tmp;
-			break;
-		}
-		link = g_list_next(link);
-	}
-
-	if (cb_info == NULL) {
-		cb_info = (interrupted_cb_info_s*)calloc(1, sizeof(interrupted_cb_info_s));
-		if (cb_info == NULL) {
-			_E("failed to allocate interrupted_cb_info_s");
-			return PERIPHERAL_ERROR_OUT_OF_MEMORY;
-		}
-
-		interrupted_cb_info_list = g_list_append(interrupted_cb_info_list, cb_info);
-	}
-
-	cb_info->handle = gpio;
-	cb_info->callback = callback;
-	cb_info->user_data = user_data;
-
-	return PERIPHERAL_ERROR_NONE;
-}
-
-static int __interrupted_cb_info_list_remove(peripheral_gpio_h gpio)
-{
-	GList *link;
-	interrupted_cb_info_s *cb_info;
-
-	link = interrupted_cb_info_list;
-	while (link) {
-		cb_info = (interrupted_cb_info_s*)link->data;
-
-		if (cb_info->handle == gpio) {
-			interrupted_cb_info_list = g_list_remove_link(interrupted_cb_info_list, link);
-			free(link->data);
-			g_list_free(link);
-			break;
-		}
-		link = g_list_next(link);
-	}
-
-	return PERIPHERAL_ERROR_NONE;
-}
-
 /**
  * @brief Initializes(export) gpio pin and creates gpio handle.
  */
@@ -200,9 +119,7 @@ int peripheral_gpio_set_direction(peripheral_gpio_h gpio, peripheral_gpio_direct
 	RETVM_IF((direction < PERIPHERAL_GPIO_DIRECTION_IN) || (direction > PERIPHERAL_GPIO_DIRECTION_OUT_INITIALLY_LOW), PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid direction input");
 
 	/* call gpio_set_direction */
-	ret = peripheral_gdbus_gpio_set_direction(gpio, direction);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set gpio direction, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
@@ -220,9 +137,7 @@ int peripheral_gpio_set_edge_mode(peripheral_gpio_h gpio, peripheral_gpio_edge_e
 	RETVM_IF((edge < PERIPHERAL_GPIO_EDGE_NONE) || (edge > PERIPHERAL_GPIO_EDGE_BOTH), PERIPHERAL_ERROR_INVALID_PARAMETER, "edge input is invalid");
 
 	/* call gpio_set_edge_mode */
-	ret = peripheral_gdbus_gpio_set_edge_mode(gpio, edge);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set edge mode of the gpio pin, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
@@ -238,16 +153,7 @@ int peripheral_gpio_set_interrupted_cb(peripheral_gpio_h gpio, peripheral_gpio_i
 	RETVM_IF(gpio == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "gpio handle is NULL");
 	RETVM_IF(callback == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "gpio interrupted callback is NULL");
 
-	ret = peripheral_gdbus_gpio_set_interrupted_cb(gpio, callback, user_data);
-	if (ret != PERIPHERAL_ERROR_NONE) {
-		_E("Failed to set gpio interrupted cb, ret : %d", ret);
-		return ret;
-	}
-
-	/* set isr */
-	ret = __interrupted_cb_info_list_append(gpio, callback, user_data);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to append gpio interrupt callback info, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
@@ -262,15 +168,7 @@ int peripheral_gpio_unset_interrupted_cb(peripheral_gpio_h gpio)
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "GPIO feature is not supported");
 	RETVM_IF(gpio == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "gpio handle is NULL");
 
-	ret = peripheral_gdbus_gpio_unset_interrupted_cb(gpio);
-	if (ret != PERIPHERAL_ERROR_NONE) {
-		_E("Failed to unset gpio interrupt callback, ret : %d", ret);
-		return ret;
-	}
-
-	ret = __interrupted_cb_info_list_remove(gpio);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to remove gpio interrupt callback info, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
@@ -287,9 +185,7 @@ int peripheral_gpio_read(peripheral_gpio_h gpio, uint32_t *value)
 	RETVM_IF(value == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "gpio read value is invalid");
 
 	/* call gpio_read */
-	ret = peripheral_gdbus_gpio_read(gpio, (int *)value);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to read value of the gpio pin, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
@@ -306,9 +202,7 @@ int peripheral_gpio_write(peripheral_gpio_h gpio, uint32_t value)
 	RETVM_IF((value != 0) && (value != 1), PERIPHERAL_ERROR_INVALID_PARAMETER, "gpio value is invalid");
 
 	/* call gpio_write */
-	ret = peripheral_gdbus_gpio_write(gpio, (int)value);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to write to the gpio pin, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
diff --git a/src/peripheral_i2c.c b/src/peripheral_i2c.c
index 5d32bf3..60e0c59 100644
--- a/src/peripheral_i2c.c
+++ b/src/peripheral_i2c.c
@@ -90,7 +90,7 @@ int peripheral_i2c_open(int bus, int address, peripheral_i2c_h *i2c)
 
 int peripheral_i2c_close(peripheral_i2c_h i2c)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "I2C feature is not supported");
 	RETVM_IF(i2c == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "i2c handle is NULL");
@@ -108,96 +108,76 @@ int peripheral_i2c_close(peripheral_i2c_h i2c)
 
 int peripheral_i2c_read(peripheral_i2c_h i2c, uint8_t *data, uint32_t length)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "I2C feature is not supported");
 	RETVM_IF(i2c == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "i2c handle is NULL");
 	RETVM_IF(data == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_i2c_read(i2c, data, (int)length);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to read data from device, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_i2c_write(peripheral_i2c_h i2c, uint8_t *data, uint32_t length)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "I2C feature is not supported");
 	RETVM_IF(i2c == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "i2c handle is NULL");
 	RETVM_IF(data == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_i2c_write(i2c, data, (int)length);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to write data to device, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_i2c_read_register_byte(peripheral_i2c_h i2c, uint8_t reg, uint8_t *data)
 {
-	int ret;
-	uint16_t w_data, dummy = 0;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "I2C feature is not supported");
 	RETVM_IF(i2c == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "i2c handle is NULL");
 	RETVM_IF(data == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_i2c_smbus_ioctl(i2c, I2C_SMBUS_READ, reg, I2C_SMBUS_BYTE_DATA, dummy, &w_data);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Smbus transaction failed, ret : %d", ret);
-
-	*data = (uint8_t)w_data;
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_i2c_write_register_byte(peripheral_i2c_h i2c, uint8_t reg, uint8_t data)
 {
-	int ret;
-	uint16_t dummy = 0;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "I2C feature is not supported");
 	RETVM_IF(i2c == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "i2c handle is NULL");
 
-	ret = peripheral_gdbus_i2c_smbus_ioctl(i2c, I2C_SMBUS_WRITE, reg, I2C_SMBUS_BYTE_DATA, (uint16_t)data, &dummy);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Smbus transaction failed, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_i2c_read_register_word(peripheral_i2c_h i2c, uint8_t reg, uint16_t *data)
 {
-	int ret;
-	uint16_t dummy = 0, data_out;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "I2C feature is not supported");
 	RETVM_IF(i2c == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "i2c handle is NULL");
 	RETVM_IF(data == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_i2c_smbus_ioctl(i2c, I2C_SMBUS_READ, reg, I2C_SMBUS_WORD_DATA, dummy, &data_out);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Smbus transaction failed, ret : %d", ret);
-
-	*data = data_out;
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_i2c_write_register_word(peripheral_i2c_h i2c, uint8_t reg, uint16_t data)
 {
-	int ret;
-	uint16_t dummy = 0;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "I2C feature is not supported");
 	RETVM_IF(i2c == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "i2c handle is NULL");
 
-	ret = peripheral_gdbus_i2c_smbus_ioctl(i2c, I2C_SMBUS_WRITE, reg, I2C_SMBUS_WORD_DATA, data, &dummy);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Smbus transaction failed, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
diff --git a/src/peripheral_pwm.c b/src/peripheral_pwm.c
index fdd0de7..1329bf1 100644
--- a/src/peripheral_pwm.c
+++ b/src/peripheral_pwm.c
@@ -98,57 +98,49 @@ int peripheral_pwm_close(peripheral_pwm_h pwm)
 
 int peripheral_pwm_set_period(peripheral_pwm_h pwm, uint32_t period_ns)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "PWM feature is not supported");
 	RETVM_IF(pwm == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "pwm handle is NULL");
 
-	ret = peripheral_gdbus_pwm_set_period(pwm, (int)period_ns);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set period, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_pwm_set_duty_cycle(peripheral_pwm_h pwm, uint32_t duty_cycle_ns)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "PWM feature is not supported");
 	RETVM_IF(pwm == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "pwm handle is NULL");
 
-	ret = peripheral_gdbus_pwm_set_duty_cycle(pwm, (int)duty_cycle_ns);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set duty cycle, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_pwm_set_polarity(peripheral_pwm_h pwm, peripheral_pwm_polarity_e polarity)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "PWM feature is not supported");
 	RETVM_IF(pwm == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "pwm handle is NULL");
 	RETVM_IF((polarity < PERIPHERAL_PWM_POLARITY_ACTIVE_HIGH) || (polarity > PERIPHERAL_PWM_POLARITY_ACTIVE_LOW), PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid polarity parameter");
 
-	ret = peripheral_gdbus_pwm_set_polarity(pwm, polarity);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set polarity, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_pwm_set_enabled(peripheral_pwm_h pwm, bool enable)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "PWM feature is not supported");
 	RETVM_IF(pwm == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "pwm handle is NULL");
 
-	ret = peripheral_gdbus_pwm_set_enable(pwm, enable);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set enable, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
diff --git a/src/peripheral_spi.c b/src/peripheral_spi.c
index 34e777c..b25dee4 100644
--- a/src/peripheral_spi.c
+++ b/src/peripheral_spi.c
@@ -99,104 +99,89 @@ int peripheral_spi_close(peripheral_spi_h spi)
 
 int peripheral_spi_set_mode(peripheral_spi_h spi, peripheral_spi_mode_e mode)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "SPI feature is not supported");
 	RETVM_IF(spi == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "spi handle is NULL");
 	RETVM_IF((mode < PERIPHERAL_SPI_MODE_0) || (mode > PERIPHERAL_SPI_MODE_3), PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid spi mode parameter");
 
-	ret = peripheral_gdbus_spi_set_mode(spi, mode);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set mode, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_spi_set_bit_order(peripheral_spi_h spi, peripheral_spi_bit_order_e bit_order)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "SPI feature is not supported");
 	RETVM_IF(spi == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "spi handle is NULL");
 	RETVM_IF((bit_order < PERIPHERAL_SPI_BIT_ORDER_MSB) || (bit_order > PERIPHERAL_SPI_BIT_ORDER_LSB), PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid bit order parameter");
 
-	bool lsb = (bit_order == PERIPHERAL_SPI_BIT_ORDER_LSB) ? true : false;
-	ret = peripheral_gdbus_spi_set_bit_order(spi, lsb);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set lsb first, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_spi_set_bits_per_word(peripheral_spi_h spi, uint8_t bits)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "SPI feature is not supported");
 	RETVM_IF(spi == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "spi handle is NULL");
 
-	ret = peripheral_gdbus_spi_set_bits_per_word(spi, (unsigned char)bits);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set bits per word, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_spi_set_frequency(peripheral_spi_h spi, uint32_t freq_hz)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "SPI feature is not supported");
 	RETVM_IF(spi == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "spi handle is NULL");
 
-	ret = peripheral_gdbus_spi_set_frequency(spi, (unsigned int)freq_hz);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set frequency, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_spi_read(peripheral_spi_h spi, uint8_t *data, uint32_t length)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "SPI feature is not supported");
 	RETVM_IF(spi == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "spi handle is NULL");
 	RETVM_IF(data == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_spi_read(spi, data, (int)length);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to read from spi device, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_spi_write(peripheral_spi_h spi, uint8_t *data, uint32_t length)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "SPI feature is not supported");
 	RETVM_IF(spi == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "spi handle is NULL");
 	RETVM_IF(data == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_spi_write(spi, data, (int)length);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to write to spi device, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_spi_transfer(peripheral_spi_h spi, uint8_t *txdata, uint8_t *rxdata, uint32_t length)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "SPI feature is not supported");
 	RETVM_IF(spi == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "spi handle is NULL");
 	RETVM_IF(txdata == NULL || rxdata == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_spi_transfer(spi, txdata, rxdata, (int)length);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to read and write, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
diff --git a/src/peripheral_uart.c b/src/peripheral_uart.c
index 10ef561..70d711a 100644
--- a/src/peripheral_uart.c
+++ b/src/peripheral_uart.c
@@ -54,7 +54,7 @@ static bool __is_feature_supported()
 int peripheral_uart_open(int port, peripheral_uart_h *uart)
 {
 	peripheral_uart_h handle;
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "UART feature is not supported");
 	RETVM_IF(uart == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid uart handle");
@@ -86,7 +86,7 @@ int peripheral_uart_open(int port, peripheral_uart_h *uart)
  */
 int peripheral_uart_close(peripheral_uart_h uart)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "UART feature is not supported");
 	RETVM_IF(uart == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "uart handle is NULL");
@@ -107,60 +107,52 @@ int peripheral_uart_close(peripheral_uart_h uart)
  */
 int peripheral_uart_set_baud_rate(peripheral_uart_h uart, peripheral_uart_baud_rate_e baud)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "UART feature is not supported");
 	RETVM_IF(uart == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "uart handle is NULL");
 	RETVM_IF((baud < PERIPHERAL_UART_BAUD_RATE_0) || (baud > PERIPHERAL_UART_BAUD_RATE_230400), PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid baud input");
 
-	ret = peripheral_gdbus_uart_set_baud_rate(uart, baud);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set baudrate, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_uart_set_byte_size(peripheral_uart_h uart, peripheral_uart_byte_size_e byte_size)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "UART feature is not supported");
 	RETVM_IF(uart == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "uart handle is NULL");
 	RETVM_IF((byte_size < PERIPHERAL_UART_BYTE_SIZE_5BIT) || (byte_size > PERIPHERAL_UART_BYTE_SIZE_8BIT), PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_uart_set_byte_size(uart, byte_size);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set uart mode, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_uart_set_parity(peripheral_uart_h uart, peripheral_uart_parity_e parity)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "UART feature is not supported");
 	RETVM_IF(uart == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "uart handle is NULL");
 	RETVM_IF((parity < PERIPHERAL_UART_PARITY_NONE) || (parity > PERIPHERAL_UART_PARITY_ODD), PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_uart_set_parity(uart, parity);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set uart mode, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
 
 int peripheral_uart_set_stop_bits(peripheral_uart_h uart, peripheral_uart_stop_bits_e stop_bits)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "UART feature is not supported");
 	RETVM_IF(uart == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "uart handle is NULL");
 	RETVM_IF((stop_bits < PERIPHERAL_UART_STOP_BITS_1BIT) || (stop_bits > PERIPHERAL_UART_STOP_BITS_2BIT), PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_uart_set_stop_bits(uart, stop_bits);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set uart mode, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
@@ -171,19 +163,14 @@ int peripheral_uart_set_stop_bits(peripheral_uart_h uart, peripheral_uart_stop_b
  */
 int peripheral_uart_set_flow_control(peripheral_uart_h uart, peripheral_uart_software_flow_control_e sw_flow_control, peripheral_uart_hardware_flow_control_e hw_flow_control)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "UART feature is not supported");
 	RETVM_IF(uart == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "uart handle is NULL");
 	RETVM_IF((sw_flow_control < PERIPHERAL_UART_SOFTWARE_FLOW_CONTROL_NONE) || (sw_flow_control > PERIPHERAL_UART_SOFTWARE_FLOW_CONTROL_XONXOFF), PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid sw_flow_control parameter");
 	RETVM_IF((hw_flow_control < PERIPHERAL_UART_HARDWARE_FLOW_CONTROL_NONE) || (hw_flow_control > PERIPHERAL_UART_HARDWARE_FLOW_CONTROL_AUTO_RTSCTS), PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid hw_flow_control parameter");
 
-	bool xonxoff = (sw_flow_control == PERIPHERAL_UART_SOFTWARE_FLOW_CONTROL_XONXOFF) ? true : false;
-	bool rtscts = (hw_flow_control == PERIPHERAL_UART_HARDWARE_FLOW_CONTROL_AUTO_RTSCTS) ? true : false;
-
-	ret = peripheral_gdbus_uart_set_flow_control(uart, xonxoff, rtscts);
-	if (ret != PERIPHERAL_ERROR_NONE)
-		_E("Failed to set flocontrol, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
@@ -193,15 +180,13 @@ int peripheral_uart_set_flow_control(peripheral_uart_h uart, peripheral_uart_sof
  */
 int peripheral_uart_read(peripheral_uart_h uart, uint8_t *data, uint32_t length)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "UART feature is not supported");
 	RETVM_IF(uart == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "uart handle is NULL");
 	RETVM_IF(data == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_uart_read(uart, data, (int)length);
-	if (ret < PERIPHERAL_ERROR_NONE)
-		_E("Failed to read from uart device, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }
@@ -211,15 +196,13 @@ int peripheral_uart_read(peripheral_uart_h uart, uint8_t *data, uint32_t length)
  */
 int peripheral_uart_write(peripheral_uart_h uart, uint8_t *data, uint32_t length)
 {
-	int ret;
+	int ret = PERIPHERAL_ERROR_NONE;
 
 	RETVM_IF(__is_feature_supported() == false, PERIPHERAL_ERROR_NOT_SUPPORTED, "UART feature is not supported");
 	RETVM_IF(uart == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "uart handle is NULL");
 	RETVM_IF(data == NULL, PERIPHERAL_ERROR_INVALID_PARAMETER, "Invalid parameter");
 
-	ret = peripheral_gdbus_uart_write(uart, data, (int)length);
-	if (ret < PERIPHERAL_ERROR_NONE)
-		_E("Failed to write to uart device, ret : %d", ret);
+	// TODO : replace interface function
 
 	return ret;
 }