include/console/uart: make index parameter unsigned

The UART index is never negative, so make it unsigned and drop the
checks for the index to be non-negative.

Change-Id: I64bd60bd2a3b82552cb3ac6524792b9ac6c09a94
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45294
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

1 files changed, 5 insertions, 5 deletions

diff --git a/src/drivers/uart/uart8250io.c b/src/drivers/uart/uart8250io.c
index 22b79e8b6b4b..d0841de39c90 100644
--- a/src/drivers/uart/uart8250io.c
+++ b/src/drivers/uart/uart8250io.c
@@ -77,14 +77,14 @@ static void uart8250_init(unsigned int base_port, unsigned int divisor)
 
 static const unsigned int bases[] = { 0x3f8, 0x2f8, 0x3e8, 0x2e8 };
 
-uintptr_t uart_platform_base(int idx)
+uintptr_t uart_platform_base(unsigned int idx)
 {
 	if (idx < ARRAY_SIZE(bases))
 		return bases[idx];
 	return 0;
 }
 
-void uart_init(int idx)
+void uart_init(unsigned int idx)
 {
 	if (!CONFIG(DRIVERS_UART_8250IO_SKIP_INIT)) {
 		unsigned int div;
@@ -94,17 +94,17 @@ void uart_init(int idx)
 	}
 }
 
-void uart_tx_byte(int idx, unsigned char data)
+void uart_tx_byte(unsigned int idx, unsigned char data)
 {
 	uart8250_tx_byte(uart_platform_base(idx), data);
 }
 
-unsigned char uart_rx_byte(int idx)
+unsigned char uart_rx_byte(unsigned int idx)
 {
 	return uart8250_rx_byte(uart_platform_base(idx));
 }
 
-void uart_tx_flush(int idx)
+void uart_tx_flush(unsigned int idx)
 {
 	uart8250_tx_flush(uart_platform_base(idx));
 }