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| author | Stephen Warren <swarren@nvidia.com> | 2011-05-17 16:12:37 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-05-19 16:51:02 -0700 |
| commit | 5f873bae704cf8b7cbd64b5720912266286c9146 (patch) | |
| tree | 0e861218bdb25d0ad3f41aa569f89d0f56d59d18 /include/linux/serial_reg.h | |
| parent | 4539c24fe4f92c09ee668ef959d3e8180df619b9 (diff) | |
| download | lwn-5f873bae704cf8b7cbd64b5720912266286c9146.tar.gz lwn-5f873bae704cf8b7cbd64b5720912266286c9146.zip | |
tty/serial: Fix break handling for PORT_TEGRA
When a break is received, Tegra's UART apparently fills the FIFO with
0 bytes. These must be drained so that they aren't interpreted as actual
data received. This allows e.g. MAGIC_SYSRQ to work on Tegra's UARTs.
v2: Added FIXME comment to clear_rx_fifo
Originally-by: Laxman Dewangan <ldewangan@nvidia.com>
Cc: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'include/linux/serial_reg.h')
| -rw-r--r-- | include/linux/serial_reg.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/serial_reg.h b/include/linux/serial_reg.h index 5f66e8499fb9..c75bda37c18e 100644 --- a/include/linux/serial_reg.h +++ b/include/linux/serial_reg.h @@ -119,6 +119,7 @@ #define UART_MCR_DTR 0x01 /* DTR complement */ #define UART_LSR 5 /* In: Line Status Register */ +#define UART_LSR_FIFOE 0x80 /* Fifo error */ #define UART_LSR_TEMT 0x40 /* Transmitter empty */ #define UART_LSR_THRE 0x20 /* Transmit-hold-register empty */ #define UART_LSR_BI 0x10 /* Break interrupt indicator */ |