linux-stable.git/drivers/tty/serial, branch linux-4.5.y Linux kernel stable tree QE-UART: add "fsl,t1040-ucc-uart" to of_device_id 2016-06-08T01:18:50+00:00 Zhao Qiang qiang.zhao@nxp.com 2016-03-09T01:48:11+00:00 82d5cbbb85368aa9679e82fc701be23d68cd187c commit 11ca2b7ab432eb90906168c327733575e68d388f upstream. New bindings use "fsl,t1040-ucc-uart" as the compatible for qe-uart. So add it. Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 11ca2b7ab432eb90906168c327733575e68d388f upstream.

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

Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
serial: samsung: Reorder the sequence of clock control when call s3c24xx_serial_set_termios() 2016-06-01T19:17:02+00:00 Chanwoo Choi cw00.choi@samsung.com 2016-04-21T09:58:31+00:00 5637fc0d84fc4dd499b4f59ea2390175ca154906 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 <cw00.choi@samsung.com> Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> 
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 <cw00.choi@samsung.com>
Reviewed-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
serial: 8250_mid: recognize interrupt source in handler 2016-06-01T19:17:02+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2016-04-04T14:35:10+00:00 33414f17f85d037ec4b1033391aa6b48dfcaa560 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 <heikki.krogerus@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
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 <heikki.krogerus@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
serial: 8250_mid: use proper bar for DNV platform 2016-06-01T19:17:02+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2016-04-04T14:35:09+00:00 7c8fcc9083c0e917e968072a0ed041f8fe1b4c70 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" <poey.seng.lai@intel.com> Fixes: 6ede6dcd87aa ("serial: 8250_mid: add support for DMA engine handling from UART MMIO") Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
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" <poey.seng.lai@intel.com>
Fixes: 6ede6dcd87aa ("serial: 8250_mid: add support for DMA engine handling from UART MMIO")
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
serial: 8250_pci: fix divide error bug if baud rate is 0 2016-06-01T19:17:02+00:00 David Müller d.mueller@elsoft.ch 2016-04-27T09:58:32+00:00 b12e9085e3f51258481604c4c12af523dd1e5247 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 <d.mueller@elsoft.ch> Fixes: 21947ba654a6 ("serial: 8250_pci: replace switch-case by formula") Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
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 <d.mueller@elsoft.ch>
Fixes: 21947ba654a6 ("serial: 8250_pci: replace switch-case by formula")
Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tty/serial: atmel: fix hardware handshake selection 2016-06-01T19:17:01+00:00 Alexandre Belloni alexandre.belloni@free-electrons.com 2016-04-12T12:51:40+00:00 48ce2de680d524fa5487cdc1f4683c278c6bd170 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 <alexandre.belloni@free-electrons.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Fixes: 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when hardware handshake is enabled") Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
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 <alexandre.belloni@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Fixes: 1cf6e8fc8341 ("tty/serial: at91: fix RTS line management when hardware handshake is enabled")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
8250: use callbacks to access UART_DLL/UART_DLM 2016-04-12T14:33:28+00:00 Sebastian Frias sf84@laposte.net 2015-12-18T16:40:05+00:00 4b49f76bc5b4dfe1c23bd7cfee2f83ccdda61c16 commit 0b41ce991052022c030fd868e03877700220b090 upstream. Some UART HW has a single register combining UART_DLL/UART_DLM (this was probably forgotten in the change that introduced the callbacks, commit b32b19b8ffc05cbd3bf91c65e205f6a912ca15d9) Fixes: b32b19b8ffc0 ("[SERIAL] 8250: set divisor register correctly ...") Signed-off-by: Sebastian Frias <sf84@laposte.net> Reviewed-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 0b41ce991052022c030fd868e03877700220b090 upstream.

Some UART HW has a single register combining UART_DLL/UART_DLM
(this was probably forgotten in the change that introduced the
callbacks, commit b32b19b8ffc05cbd3bf91c65e205f6a912ca15d9)

Fixes: b32b19b8ffc0 ("[SERIAL] 8250: set divisor register correctly ...")

Signed-off-by: Sebastian Frias <sf84@laposte.net>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Revert "8250: uniphier: allow modular build with 8250 console" 2016-02-08T02:22:54+00:00 Greg Kroah-Hartman gregkh@linuxfoundation.org 2016-02-08T02:22:54+00:00 c8053b58762745d93930826b60a4073854a15ce5 This reverts commit d56edd7ed0ed46a8043ee3040ededbd190818ccf, it shouldn't have been applied, it was fixed properly with commit 71f50c6d9a2276f3ec85384bffe2aee1962f4669 ("of: drop symbols declared by _OF_DECLARE() from modules") Reported-by: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
This reverts commit d56edd7ed0ed46a8043ee3040ededbd190818ccf, it
shouldn't have been applied, it was fixed properly with commit
71f50c6d9a2276f3ec85384bffe2aee1962f4669 ("of: drop symbols declared by
_OF_DECLARE() from modules")

Reported-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
tty: Add support for PCIe WCH382 2S multi-IO card 2016-02-07T07:08:00+00:00 Jeremy McNicoll jmcnicol@redhat.com 2016-02-02T21:00:45+00:00 7dde55787b43a8f2b4021916db38d90c03a2ec64 WCH382 2S board is a PCIe card with 2 DB9 COM ports detected as Serial controller: Device 1c00:3253 (rev 10) (prog-if 05 [16850]) Signed-off-by: Jeremy McNicoll <jmcnicol@redhat.com> Cc: stable <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
WCH382 2S board is a PCIe card with 2 DB9 COM ports detected as
Serial controller: Device 1c00:3253 (rev 10) (prog-if 05 [16850])

Signed-off-by: Jeremy McNicoll <jmcnicol@redhat.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
serial/omap: mark wait_for_xmitr as __maybe_unused 2016-02-07T07:04:51+00:00 Arnd Bergmann arnd@arndb.de 2016-01-13T20:59:23+00:00 b4a512b8bf7185787e291cddad3b6457b2367120 The wait_for_xmitr() function is only used if CONFIG_CONSOLE_POLL or CONFIG_SERIAL_OMAP_CONSOLE are set, but when both are disabled, the compiler warns about it being unused: drivers/tty/serial/omap-serial.c:1168:13: warning: 'wait_for_xmitr' defined but not used [-Wunused-func We could add more #ifdefs to work around it, but adding __maybe_unused seems nicer. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: 2172076d2399 ("serial/omap-serial: Deinline wait_for_xmitr, save 165 bytes") Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
The wait_for_xmitr() function is only used if CONFIG_CONSOLE_POLL
or CONFIG_SERIAL_OMAP_CONSOLE are set, but when both are disabled,
the compiler warns about it being unused:

drivers/tty/serial/omap-serial.c:1168:13: warning: 'wait_for_xmitr' defined but not used [-Wunused-func

We could add more #ifdefs to work around it, but adding __maybe_unused
seems nicer.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 2172076d2399 ("serial/omap-serial: Deinline wait_for_xmitr, save 165 bytes")
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>