8 files changed, 11 insertions, 11 deletions
diff --git a/platform/common/include/plat/serial/sifive-uart.h b/platform/common/include/plat/serial/sifive-uart.h
index 2c4e7f3d..6a645951 100644
--- a/platform/common/include/plat/serial/sifive-uart.h
+++ b/platform/common/include/plat/serial/sifive-uart.h
@@ -14,7 +14,7 @@
 
 void sifive_uart_putc(char ch);
 
-char sifive_uart_getc(void);
+int sifive_uart_getc(void);
 
 int sifive_uart_init(unsigned long base,
 		     u32 in_freq, u32 baudrate);
diff --git a/platform/common/include/plat/serial/uart8250.h b/platform/common/include/plat/serial/uart8250.h
index c1ffc0d7..3d58050a 100644
--- a/platform/common/include/plat/serial/uart8250.h
+++ b/platform/common/include/plat/serial/uart8250.h
@@ -14,7 +14,7 @@
 
 void uart8250_putc(char ch);
 
-char uart8250_getc(void);
+int uart8250_getc(void);
 
 int uart8250_init(unsigned long base,
 		  u32 in_freq, u32 baudrate,
diff --git a/platform/common/serial/sifive-uart.c b/platform/common/serial/sifive-uart.c
index 2c0e1f1e..08cc485c 100644
--- a/platform/common/serial/sifive-uart.c
+++ b/platform/common/serial/sifive-uart.c
@@ -69,12 +69,12 @@ void sifive_uart_putc(char ch)
 	set_reg(UART_REG_TXFIFO, ch);
 }
 
-char sifive_uart_getc(void)
+int sifive_uart_getc(void)
 {
 	u32 ret = get_reg(UART_REG_RXFIFO);
 	if (!(ret & UART_RXFIFO_EMPTY))
 		return ret & UART_RXFIFO_DATA;
-	return 0;
+	return -1;
 }
 
 int sifive_uart_init(unsigned long base,
diff --git a/platform/common/serial/uart8250.c b/platform/common/serial/uart8250.c
index 02eabbe0..ce0f4ca4 100644
--- a/platform/common/serial/uart8250.c
+++ b/platform/common/serial/uart8250.c
@@ -71,11 +71,11 @@ void uart8250_putc(char ch)
 	set_reg(UART_THR_OFFSET, ch);
 }
 
-char uart8250_getc(void)
+int uart8250_getc(void)
 {
 	if (get_reg(UART_LSR_OFFSET) & UART_LSR_DR)
 		return get_reg(UART_RBR_OFFSET);
-	return 0;
+	return -1;
 }
 
 int uart8250_init(unsigned long base,
diff --git a/platform/kendryte/k210/platform.c b/platform/kendryte/k210/platform.c
index f1e19b79..104edccb 100644
--- a/platform/kendryte/k210/platform.c
+++ b/platform/kendryte/k210/platform.c
@@ -31,7 +31,7 @@ static void k210_console_putc(char c)
 	uarths_putc(c);
 }
 
-static char k210_console_getc(void)
+static int k210_console_getc(void)
 {
 	return uarths_getc();
 }
diff --git a/platform/kendryte/k210/uarths.c b/platform/kendryte/k210/uarths.c
index f8f4974c..34fcf394 100644
--- a/platform/kendryte/k210/uarths.c
+++ b/platform/kendryte/k210/uarths.c
@@ -48,12 +48,12 @@ void uarths_putc(char c)
 	uarths->txdata.data = (u8)c;
 }
 
-char uarths_getc(void)
+int uarths_getc(void)
 {
 	struct uarths_rxdata rx = uarths->rxdata;
 
 	if (rx.empty)
-		return '\0';
+		return -1;
 
 	return rx.data;
 }
diff --git a/platform/kendryte/k210/uarths.h b/platform/kendryte/k210/uarths.h
index dd0433cf..f247a63a 100644
--- a/platform/kendryte/k210/uarths.h
+++ b/platform/kendryte/k210/uarths.h
@@ -161,6 +161,6 @@ enum uarths_stopbit {
 
 void uarths_init(u32 baud_rate, enum uarths_stopbit stopbit);
 void uarths_putc(char c);
-char uarths_getc(void);
+int uarths_getc(void);
 
 #endif /* _K210_UARTHS_H_ */
diff --git a/platform/template/platform.c b/platform/template/platform.c
index e7a70aa9..c14398f8 100644
--- a/platform/template/platform.c
+++ b/platform/template/platform.c
@@ -73,7 +73,7 @@ static void platform_console_putc(char ch)
 /*
  * Read a character from the platform console input.
  */
-static char platform_console_getc(void)
+static int platform_console_getc(void)
 {
 	return uart8250_getc();
 }