diff options
Diffstat (limited to 'payloads/libpayload/drivers/serial/8250.c')
| -rw-r--r-- | payloads/libpayload/drivers/serial/8250.c | 10 |
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) |