5 files changed, 9 insertions, 9 deletions
diff --git a/src/mainboard/emulation/qemu-aarch64/mmio.c b/src/mainboard/emulation/qemu-aarch64/mmio.c
index 0cffc282ec..0fac64d234 100644
--- a/src/mainboard/emulation/qemu-aarch64/mmio.c
+++ b/src/mainboard/emulation/qemu-aarch64/mmio.c
@@ -3,7 +3,7 @@
 #include <console/uart.h>
 #include <mainboard/addressmap.h>
 
-uintptr_t uart_platform_base(int idx)
+uintptr_t uart_platform_base(unsigned int idx)
 {
 	return VIRT_UART_BASE;
 }
diff --git a/src/mainboard/emulation/qemu-armv7/mmio.c b/src/mainboard/emulation/qemu-armv7/mmio.c
index 3f239153db..0f07e7f1ef 100644
--- a/src/mainboard/emulation/qemu-armv7/mmio.c
+++ b/src/mainboard/emulation/qemu-armv7/mmio.c
@@ -4,7 +4,7 @@
 
 #define VEXPRESS_UART0_IO_ADDRESS      (0x10009000)
 
-uintptr_t uart_platform_base(int idx)
+uintptr_t uart_platform_base(unsigned int idx)
 {
 	return VEXPRESS_UART0_IO_ADDRESS;
 }
diff --git a/src/mainboard/emulation/qemu-power8/uart.c b/src/mainboard/emulation/qemu-power8/uart.c
index c6d7e40fef..4b1bf3287e 100644
--- a/src/mainboard/emulation/qemu-power8/uart.c
+++ b/src/mainboard/emulation/qemu-power8/uart.c
@@ -5,26 +5,26 @@
 #include <boot/coreboot_tables.h>
 
 static uint8_t *buf = (void *)0;
-uintptr_t uart_platform_base(int idx)
+uintptr_t uart_platform_base(unsigned int idx)
 {
 	return (uintptr_t) buf;
 }
 
-void uart_init(int idx)
+void uart_init(unsigned int idx)
 {
 }
 
-unsigned char uart_rx_byte(int idx)
+unsigned char uart_rx_byte(unsigned int idx)
 {
 	return 0;
 }
 
-void uart_tx_byte(int idx, unsigned char data)
+void uart_tx_byte(unsigned int idx, unsigned char data)
 {
 
 }
 
-void uart_tx_flush(int idx)
+void uart_tx_flush(unsigned int idx)
 {
 }
 
diff --git a/src/mainboard/emulation/qemu-riscv/uart.c b/src/mainboard/emulation/qemu-riscv/uart.c
index 4eee12b933..19a2b0016c 100644
--- a/src/mainboard/emulation/qemu-riscv/uart.c
+++ b/src/mainboard/emulation/qemu-riscv/uart.c
@@ -4,7 +4,7 @@
 #include <console/uart.h>
 #include <mainboard/addressmap.h>
 
-uintptr_t uart_platform_base(int idx)
+uintptr_t uart_platform_base(unsigned int idx)
 {
 	return (uintptr_t) QEMU_VIRT_UART0;
 }
diff --git a/src/mainboard/emulation/spike-riscv/uart.c b/src/mainboard/emulation/spike-riscv/uart.c
index d6e0510274..efefc52d62 100644
--- a/src/mainboard/emulation/spike-riscv/uart.c
+++ b/src/mainboard/emulation/spike-riscv/uart.c
@@ -3,7 +3,7 @@
 #include <types.h>
 #include <console/uart.h>
 
-uintptr_t uart_platform_base(int idx)
+uintptr_t uart_platform_base(unsigned int idx)
 {
 	return (uintptr_t) 0x02100000;
 }