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| author | Max Krummenacher <max.krummenacher@toradex.com> | 2021-10-16 13:04:24 +0200 |
|---|---|---|
| committer | Max Krummenacher <max.krummenacher@toradex.com> | 2021-10-16 13:04:24 +0200 |
| commit | f8e718054f4421d11638e370b933ccc6c77466ed (patch) | |
| tree | 973ff8cb8aed7d8e4da6a194456ddc01c206b7de /drivers/tty/serial/8250/8250_port.c | |
| parent | d900385139e5aa8d584dee92c87bb85d0226253e (diff) | |
| parent | 1392fe82d7fba00ba4a8e01968935f2b2085d5a4 (diff) | |
Merge tag 'v4.4.288' into toradex_vf_4.4
This is the 4.4.288 stable release
Signed-off-by: Max Krummenacher <max.krummenacher@toradex.com>
Diffstat (limited to 'drivers/tty/serial/8250/8250_port.c')
| -rw-r--r-- | drivers/tty/serial/8250/8250_port.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/drivers/tty/serial/8250/8250_port.c b/drivers/tty/serial/8250/8250_port.c index fef1b9335f60..d0d90752f9f3 100644 --- a/drivers/tty/serial/8250/8250_port.c +++ b/drivers/tty/serial/8250/8250_port.c @@ -124,7 +124,8 @@ static const struct serial8250_config uart_config[] = { .name = "16C950/954", .fifo_size = 128, .tx_loadsz = 128, - .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_10, + .fcr = UART_FCR_ENABLE_FIFO | UART_FCR_R_TRIG_01, + .rxtrig_bytes = {16, 32, 112, 120}, /* UART_CAP_EFR breaks billionon CF bluetooth card. */ .flags = UART_CAP_FIFO | UART_CAP_SLEEP, }, @@ -274,7 +275,11 @@ configured less than Maximum supported fifo bytes */ /* Uart divisor latch read */ static int default_serial_dl_read(struct uart_8250_port *up) { - return serial_in(up, UART_DLL) | serial_in(up, UART_DLM) << 8; + /* Assign these in pieces to truncate any bits above 7. */ + unsigned char dll = serial_in(up, UART_DLL); + unsigned char dlm = serial_in(up, UART_DLM); + + return dll | dlm << 8; } /* Uart divisor latch write */ @@ -1160,9 +1165,11 @@ static void autoconfig(struct uart_8250_port *up) serial_out(up, UART_LCR, 0); serial_out(up, UART_FCR, UART_FCR_ENABLE_FIFO); - scratch = serial_in(up, UART_IIR) >> 6; - switch (scratch) { + /* Assign this as it is to truncate any bits above 7. */ + scratch = serial_in(up, UART_IIR); + + switch (scratch >> 6) { case 0: autoconfig_8250(up); break; |