linux-stable.git/drivers/tty/serial, branch v4.6.2

QE-UART: add "fsl,t1040-ucc-uart" to of_device_id

2016-06-08T01:23:39+00:00

commit 11ca2b7ab432eb90906168c327733575e68d388f upstream.

New bindings use "fsl,t1040-ucc-uart" as the compatible for qe-uart.
So add it.

Signed-off-by: Zhao Qiang 
Signed-off-by: Greg Kroah-Hartman

serial: samsung: Reorder the sequence of clock control when call s3c24xx_serial_set_termios()

2016-06-01T19:18:03+00:00

commit b8995f527aac143e83d3900ff39357651ea4e0f6 upstream.

This patch fixes the broken serial log when changing the clock source
of uart device. Before disabling the original clock source, this patch
enables the new clock source to protect the clock off state for a split second.

Signed-off-by: Chanwoo Choi 
Reviewed-by: Marek Szyprowski 
Signed-off-by: Greg Kroah-Hartman 
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Krzysztof Kozlowski

serial: 8250_mid: recognize interrupt source in handler

2016-06-01T19:18:03+00:00

commit c42850f1ae7e70056f852e67bb9dddf927853b47 upstream.

There is a special register that shows interrupt status by source. In
particular case the source can be a combination of DMA Tx, DMA Rx, and UART.

Read the register and call the handlers only for sources that request an
interrupt.

Fixes: 6ede6dcd87aa ("serial: 8250_mid: add support for DMA engine handling from UART MMIO")
Reviewed-by: Heikki Krogerus 
Signed-off-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

serial: 8250_mid: use proper bar for DNV platform

2016-06-01T19:18:03+00:00

commit 107e15fc1f8d6ef69eac5f175971252f76e82f0d upstream.

Unlike Intel Medfield and Tangier platforms DNV uses PCI BAR0 for IO compatible
resources and BAR1 for MMIO. We need latter in a way to support DMA. Introduce
an additional field in the internal structure and pass PCI BAR based on device
ID.

Reported-by: "Lai, Poey Seng" 
Fixes: 6ede6dcd87aa ("serial: 8250_mid: add support for DMA engine handling from UART MMIO")
Reviewed-by: Heikki Krogerus 
Signed-off-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

serial: 8250_pci: fix divide error bug if baud rate is 0

2016-06-01T19:18:03+00:00

commit 6f210c18c1c0f016772c8cd51ae12a02bfb9e7ef upstream.

Since commit 21947ba654a6 ("serial: 8250_pci: replace switch-case by
formula"), the 8250 driver crashes in the byt_set_termios() function
with a divide error. This is caused by the fact that a baud rate of 0 (B0)
is not handled properly. Fix it by falling back to B9600 in this case.

Signed-off-by: David Müller 
Fixes: 21947ba654a6 ("serial: 8250_pci: replace switch-case by formula")
Suggested-by: Andy Shevchenko 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

tty/serial: atmel: fix hardware handshake selection

2016-06-01T19:18:03+00:00

commit 5be605ac9af979265d7b64c160ad9928088a78be upstream.

Commit 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when
hardware handshake is enabled") actually allowed to enable hardware
handshaking.
Before, the CRTSCTS flags was silently ignored.

As the DMA controller can't drive RTS (as explain in the commit message).
Ensure that hardware flow control stays disabled when DMA is used and FIFOs
are not available.

Signed-off-by: Alexandre Belloni 
Acked-by: Nicolas Ferre 
Fixes: 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when hardware handshake is enabled")
Signed-off-by: Greg Kroah-Hartman

Revert "serial: 8250: Add hardware dependency to RT288X option"

2016-04-19T06:17:37+00:00

This reverts commit 8d2acdb9fc3a544ab0442634531834d6007b5467.

It's causing problems, and somehow I missed that Peter didn't like it at
all :(
So revert it for now until it gets sorted out.

Reported-by: Mason 
Cc: Peter Hurley 
Cc: Jean Delvare 
Cc: Mans Rullgard 
Cc: Jiri Slaby 
Cc: John Crispin 
Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

tty/serial/8250: fix RS485 half-duplex RX

2016-04-19T06:15:38+00:00

When in half-duplex mode RX will be disabled before TX, but not
enabled after deactivating transmitter. This patch enables
UART_IER_RLSI and UART_IER_RDI interrupts after TX is over.

Cc: Matwey V. Kornilov 
Signed-off-by: Yegor Yefremov 
Fixes: e490c9144cfa ("tty: Add software emulated RS485 support for 8250")
Acked-by: Matwey V. Kornilov 
Signed-off-by: Greg Kroah-Hartman

Revert "serial-uartlite: Constify uartlite_be/uartlite_le"

2016-04-19T06:15:38+00:00

This reverts commit 2905697a82eaf20606ced164d853b52d1b94aaa8.

The commit introduced two build warnings:
drivers/tty/serial/uartlite.c: In function ‘ulite_request_port’:
drivers/tty/serial/uartlite.c:348:21: warning: assignment discards
			‘const’ qualifier from pointer target type
  port->private_data = &uartlite_be;
                     ^
drivers/tty/serial/uartlite.c:354:22: warning: assignment discards
			‘const’ qualifier from pointer target type
   port->private_data = &uartlite_le;
                      ^

Signed-off-by: Sudip Mukherjee 
Cc: Maarten Brock 
Cc: Arnd Bergmann 
Signed-off-by: Greg Kroah-Hartman

serial: 8250: describe CONFIG_SERIAL_8250_RSA

2016-03-08T00:11:14+00:00

CONFIG_SERIAL_8250_RSA has waited for a long
time to have meaningful help text so let's
finally describe what this option actually does.

Signed-off-by: Maciej S. Szmigiero 
Signed-off-by: Greg Kroah-Hartman