linux-stable.git/drivers/tty/serial/8250, branch v4.4

serial: 8250_uniphier: fix dl_read and dl_write functions

2015-12-13T05:42:31+00:00

The register offset must be shifted by regshift, otherwise the
baudrate is not set.  I missed the issue probably because the
divisor register was already set by the boot loader.

Fixes: 1a8d2903cb6a ("serial: 8250_uniphier: add UniPhier serial driver")
Signed-off-by: Masahiro Yamada 
Signed-off-by: Greg Kroah-Hartman

serial: export fsl8250_handle_irq

2015-11-21T00:19:54+00:00

fsl8250_handle_irq is now used by the of_serial driver, and that fails
if it is a loadable module:

ERROR: "fsl8250_handle_irq" [drivers/tty/serial/of_serial.ko] undefined!

This exports the symbol to avoid randconfig errors.

Signed-off-by: Arnd Bergmann 
Fixes: d43b54d269d2 ("serial: Enable Freescale 16550 workaround on arm")
Cc: Scott Wood 
Signed-off-by: Jeff Mahoney 
Signed-off-by: Greg Kroah-Hartman

serial: 8250_mid: Add missing dependency

2015-11-21T00:19:54+00:00

8250_mid uses rational_best_approximation() function, so the
driver needs to select CONFIG_RATIONAL option.

This fixes build error when CONFIG_RATIONAL is not enabled:

drivers/built-in.o: In function `mid8250_set_termios':
8250_mid.c:(.text+0x10169a): undefined reference to `rational_best_approximation'

Reported-by: Randy Dunlap 
Signed-off-by: Heikki Krogerus 
Acked-by: Andy Shevchenko 
Signed-off-by: Arnd Bergmann 
Signed-off-by: Greg Kroah-Hartman

Merge tag 'clk-for-linus-20151104' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

2015-11-05T20:59:36+00:00

Pull clk updates from Stephen Boyd:
 "The majority of the changes are driver updates and new device support.
  The core framework is mostly unchanged this time around, with only a
  couple patches to expose a clk provider API and make getting clk
  parent names from DT more robust.

  Driver updates:

   - Support for clock controllers found on Broadcom Northstar SoCs and
     bcm2835 SoC

   - Support for Allwinner audio clocks

   - A few cleanup patches for Tegra drivers and support for the highest
     DFLL frequencies on Tegra124

   - Samsung exynos7 fixes and improvements

   - i.Mx SoC updates to add a few missing clocks and keep debug uart
     clocks on during kernel intialization

   - Some mediatek cleanups and support for more subsystem clocks

   - Support for msm8916 gpu/audio clocks and qcom's GDSC power domain
     controllers

   - A new driver for the Silabs si514 clock chip"

* tag 'clk-for-linus-20151104' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (143 commits)
  clk: qcom: msm8960: Fix dsi1/2 halt bits
  clk: lpc18xx-cgu: fix potential system hang when disabling unused clocks
  clk: lpc18xx-ccu: fix potential system hang when disabling unused clocks
  clk: Add clk_hw_is_enabled() for use by clk providers
  clk: Add stubs for of_clk_*() APIs when CONFIG_OF=n
  clk: versatile-icst: fix memory leak
  clk: Remove clk_{register,unregister}_multiplier()
  clk: iproc: define Broadcom NS2 iProc clock binding
  clk: iproc: define Broadcom NSP iProc clock binding
  clk: ns2: add clock support for Broadcom Northstar 2 SoC
  clk: iproc: Separate status and control variables
  clk: iproc: Split off dig_filter
  clk: iproc: Add PLL base write function
  clk: nsp: add clock support for Broadcom Northstar Plus SoC
  clk: iproc: Add PWRCTRL support
  clk: cygnus: Convert all macros to all caps
  ARM: cygnus: fix link failures when CONFIG_COMMON_CLK_IPROC is disabled
  clk: imx31: add missing of_node_put
  clk: imx27: add missing of_node_put
  clk: si5351: add missing of_node_put
  ...

Merge tag 'tty-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2015-11-05T05:35:12+00:00

Pull tty/serial driver updates from Greg KH:
 "Here is the big tty and serial driver update for 4.4-rc1.

  Lots of serial driver updates and a few small tty core changes.  Full
  details in the shortlog.

  All of these have been in linux-next for a while"

* tag 'tty-4.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (148 commits)
  tty: Use unbound workqueue for all input workers
  tty: Abstract tty buffer work
  tty: Prevent tty teardown during tty_write_message()
  tty: core: Use correct spinlock flavor in tiocspgrp()
  tty: Combine SIGTTOU/SIGTTIN handling
  serial: amba-pl011: fix incorrect integer size in pl011_fifo_to_tty()
  ttyFDC: Fix build problems due to use of module_{init,exit}
  tty: remove unneeded return statement
  serial: 8250_mid: add support for DMA engine handling from UART MMIO
  dmaengine: hsu: remove platform data
  dmaengine: hsu: introduce stubs for the exported functions
  dmaengine: hsu: make the UART driver in control of selecting this driver
  serial: fix mctrl helper functions
  serial: 8250_pci: Intel MID UART support to its own driver
  serial: fsl_lpuart: add earlycon support
  tty: disable unbind for old 74xx based serial/mpsc console port
  serial: pl011: Spelling s/clocks-names/clock-names/
  n_tty: Remove reader wakeups for TTY_BREAK/TTY_PARITY chars
  tty: synclink, fix indentation
  serial: at91, fix rs485 properties
  ...

Revert "serial: 8250_dma: don't bother DMA with small transfers"

2015-10-18T04:24:46+00:00

This reverts commit 9119fba0cfeda6d415c9f068df66838a104b87cb.

This commit prevents from sending "big" file using Bluetooth.
When sending a lot of data quickly through the Bluetooth interface, and
after a variable amount of data sent, transfer fails with error:
    kernel: [  415.247453] Bluetooth: hci0 hardware error 0x00

Found on T100TA.

After reverting this commit, send works fine for any file size.

Signed-off-by: Frederic Danis 
Fixes: 9119fba0cfed (serial: 8250_dma: don't bother DMA with small transfers)
Cc: stable@vger.kernel.org
Reviewed-by: Heikki Krogerus 
Acked-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

serial: 8250_mid: add support for DMA engine handling from UART MMIO

2015-10-18T04:22:08+00:00

The platforms that have this UART, but that don't have
separate PCI device for the DMA Engine, need to create the
HSU DMA Engine device separately.

Signed-off-by: Heikki Krogerus 
Acked-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

dmaengine: hsu: make the UART driver in control of selecting this driver

2015-10-18T04:22:08+00:00

HSU (High Speed UART) DMA engine, like the name suggests, is
an integrated DMA engine for UART and UART alone. Therefore,
making the UART drivers responsible of selecting it and
removing the user selectable option for it. The UARTs with
this DMA engine can always select HSU_DMA when
SERIAL_8250_DMA option is enabled.

Suggested-by: Andy Shevchenko 
Signed-off-by: Heikki Krogerus 
Acked-by: Vinod Koul 
Acked-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

serial: 8250_pci: Intel MID UART support to its own driver

2015-10-18T04:18:38+00:00

Intel MID UART quirks require already quite a bit of code
in 8250_pci.c. On new Intel platforms where it is used, the
integrated DMA engine no longer has its own PCI device, but
is instead configured from the UART's MMIO. That means we
will have to add even more code for handling just MID UARTs.

Instead of adding that to 8250_pci.c, splitting the support
of Intel MID UART into its own driver. Handling of the
integrated DMA engine becomes much simpler this way. Own
driver will also remove the need for things like specific
set_termios hooks for every board using this UART, and
simplify the handling of it in general.

Signed-off-by: Heikki Krogerus 
Acked-by: Andy Shevchenko 
Signed-off-by: Greg Kroah-Hartman

serial: 8250_omap: Remove RTS clear

2015-10-18T04:05:46+00:00

Clearing UART_MCR_RTS or UART_MCR_XONANY is unnecessary; these bits
are never set in the shadow mcr. The RTS clear is especially confusing.

Signed-off-by: Peter Hurley 
Signed-off-by: Greg Kroah-Hartman