diff options
| author | Tim Chu <Tim.Chu@quantatw.com> | 2022-10-18 07:04:24 +0000 |
|---|---|---|
| committer | Felix Held <felix-coreboot@felixheld.de> | 2022-10-25 15:11:59 +0000 |
| commit | 5e5335da685482bc790fffe22f1b9aab6e416248 (patch) | |
| tree | e37504744c7627523dccd349209180bcd1fe6111 /src/drivers/uart | |
| parent | a52d26f2e590f5f9bf225fae677e29f9df056cd4 (diff) | |
src/drivers/uart: Add definition of FIFO enabled in IIR
Interrupt Identification Register (IIR) is a I/O read-access register.
Add definition of FIFO enabled for this register so that we can check
whether FIFO is enabled or not.
Signed-off-by: Tim Chu <Tim.Chu@quantatw.com>
Change-Id: I12e8566822693004418cf83cae466dc3e2d612c4
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68566
Reviewed-by: Jonathan Zhang <jonzhang@fb.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/drivers/uart')
| -rw-r--r-- | src/drivers/uart/uart8250reg.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/drivers/uart/uart8250reg.h b/src/drivers/uart/uart8250reg.h index 35a6845554..c6f23ac1ca 100644 --- a/src/drivers/uart/uart8250reg.h +++ b/src/drivers/uart/uart8250reg.h @@ -24,6 +24,7 @@ #define UART8250_IIR_THRI 0x02 /* Transmitter holding register empty */ #define UART8250_IIR_RDI 0x04 /* Receiver data interrupt */ #define UART8250_IIR_RLSI 0x06 /* Receiver line status interrupt */ +#define UART8250_IIR_FIFO_EN 0xC0 /* FIFO enabled */ #define UART8250_FCR 0x02 #define UART8250_FCR_FIFO_EN BIT(0) /* Fifo enable */ |