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-rw-r--r--src/drivers/uart/Kconfig5
-rw-r--r--src/drivers/uart/uart8250mem.c12
2 files changed, 17 insertions, 0 deletions
diff --git a/src/drivers/uart/Kconfig b/src/drivers/uart/Kconfig
index fef745e418..cbfd47954a 100644
--- a/src/drivers/uart/Kconfig
+++ b/src/drivers/uart/Kconfig
@@ -17,6 +17,11 @@ config DRIVERS_UART_8250MEM
bool
default n
+config DRIVERS_UART_8250MEM_32
+ bool
+ default n
+ depends on DRIVERS_UART_8250MEM
+
config HAVE_UART_SPECIAL
bool
default n
diff --git a/src/drivers/uart/uart8250mem.c b/src/drivers/uart/uart8250mem.c
index 2f341f2d6e..d276fd0410 100644
--- a/src/drivers/uart/uart8250mem.c
+++ b/src/drivers/uart/uart8250mem.c
@@ -34,6 +34,17 @@
#define SINGLE_CHAR_TIMEOUT (50 * 1000)
#define FIFO_TIMEOUT (16 * SINGLE_CHAR_TIMEOUT)
+#if IS_ENABLED(CONFIG_DRIVERS_UART_8250MEM_32)
+static uint8_t uart8250_read(void *base, uint8_t reg)
+{
+ return read32(base + 4 * reg) & 0xff;
+}
+
+static void uart8250_write(void *base, uint8_t reg, uint8_t data)
+{
+ write32(base + 4 * reg, data);
+}
+#else
static uint8_t uart8250_read(void *base, uint8_t reg)
{
return read8(base + reg);
@@ -43,6 +54,7 @@ static void uart8250_write(void *base, uint8_t reg, uint8_t data)
{
write8(base + reg, data);
}
+#endif
static int uart8250_mem_can_tx_byte(void *base)
{