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-rw-r--r--payloads/libpayload/drivers/serial/8250.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/payloads/libpayload/drivers/serial/8250.c b/payloads/libpayload/drivers/serial/8250.c
index 7fe9920a6c..0386f23a57 100644
--- a/payloads/libpayload/drivers/serial/8250.c
+++ b/payloads/libpayload/drivers/serial/8250.c
@@ -46,7 +46,10 @@ static uint8_t serial_read_reg(int offset)
return inb(IOBASE + offset);
else
#endif
- return readb(MEMBASE + offset);
+ if (lib_sysinfo.serial->regwidth == 4)
+ return readl(MEMBASE + offset) & 0xff;
+ else
+ return readb(MEMBASE + offset);
}
static void serial_write_reg(uint8_t val, int offset)
@@ -58,7 +61,10 @@ static void serial_write_reg(uint8_t val, int offset)
outb(val, IOBASE + offset);
else
#endif
- writeb(val, MEMBASE + offset);
+ if (lib_sysinfo.serial->regwidth == 4)
+ writel(val & 0xff, MEMBASE + offset);
+ else
+ writeb(val, MEMBASE + offset);
}
#if IS_ENABLED(CONFIG_LP_SERIAL_SET_SPEED)