linux/drivers/tty/serial, branch v5.2

tty: max310x: Fix external crystal register setup

2019-05-21T10:18:17Z

The datasheet states: Bit 4: ClockEnSet the ClockEn bit high to enable an external clocking (crystal or clock generator at XIN). Set the ClockEn bit to 0 to disable clocking Bit 1: CrystalEnSet the CrystalEn bit high to enable the crystal oscillator. When using an external clock source at XIN, CrystalEn must be set low. The bit 4, MAX310X_CLKSRC_EXTCLK_BIT, should be set and was not. This was required to make the MAX3107 with an external crystal on our board able to send or receive data. Signed-off-by: Joe Burmeister Cc: stable Signed-off-by: Greg Kroah-Hartman

serial: sh-sci: disable DMA for uart_console

2019-05-21T10:18:17Z

As noted in commit 84b40e3b57ee ("serial: 8250: omap: Disable DMA for console UART"), UART console lines use low-level PIO only access functions which will conflict with use of the line when DMA is enabled, e.g. when the console line is also used for systemd messages. So disable DMA support for UART console lines. Reported-by: Michael Rodin Link: https://patchwork.kernel.org/patch/10929511/ Tested-by: Eugeniu Rosca Reviewed-by: Simon Horman Reviewed-by: Wolfram Sang Reviewed-by: Geert Uytterhoeven Cc: stable@vger.kernel.org Signed-off-by: George G. Davis Signed-off-by: Greg Kroah-Hartman

serial: imx: remove log spamming error message

2019-05-21T10:18:17Z

Each time the DMA engine signals a transaction error the driver prints a message at error level. Getting transaction errors is pretty much expected on baudrate mismatches and the correspoding error counters are increased in this case properly. Remove the error message which is possibly repeated at a very high rate which can lock up the whole system. Signed-off-by: Sascha Hauer Reviewed-by: Fabio Estevam Signed-off-by: Greg Kroah-Hartman

tty: serial: msm_serial: Fix XON/XOFF

2019-05-21T10:18:16Z

When the tty layer requests the uart to throttle, the current code executing in msm_serial will trigger "Bad mode in Error Handler" and generate an invalid stack frame in pstore before rebooting (that is if pstore is indeed configured: otherwise the user shall just notice a reboot with no further information dumped to the console). This patch replaces the PIO byte accessor with the word accessor already used in PIO mode. Fixes: 68252424a7c7 ("tty: serial: msm: Support big-endian CPUs") Cc: stable@vger.kernel.org Signed-off-by: Jorge Ramirez-Ortiz Reviewed-by: Bjorn Andersson Reviewed-by: Stephen Boyd Signed-off-by: Greg Kroah-Hartman

Merge tag 'dmaengine-5.2-rc1' of git://git.infradead.org/users/vkoul/slave-dma

2019-05-09T15:51:45Z

Pull dmaengine updates from Vinod Koul: - Updates to stm32 dma residue calculations - Interleave dma capability to axi-dmac and support for ZynqMP arch - Rework of channel assignment for rcar dma - Debugfs for pl330 driver - Support for Tegra186/Tegra194, refactoring for new chips and support for pause/resume - Updates to axi-dmac, bcm2835, fsl-edma, idma64, imx-sdma, rcar-dmac, stm32-dma etc - dev_get_drvdata() updates on few drivers * tag 'dmaengine-5.2-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (34 commits) dmaengine: tegra210-adma: restore channel status dmaengine: tegra210-dma: free dma controller in remove() dmaengine: tegra210-adma: add pause/resume support dmaengine: tegra210-adma: add support for Tegra186/Tegra194 Documentation: DT: Add compatibility binding for Tegra186 dmaengine: tegra210-adma: prepare for supporting newer Tegra chips dmaengine: at_xdmac: remove a stray bottom half unlock dmaengine: fsl-edma: Adjust indentation dmaengine: fsl-edma: Fix typo in Vybrid name dmaengine: stm32-dma: fix residue calculation in stm32-dma dmaengine: nbpfaxi: Use dev_get_drvdata() dmaengine: bcm-sba-raid: Use dev_get_drvdata() dmaengine: stm32-dma: Fix unsigned variable compared with zero dmaengine: stm32-dma: use platform_get_irq() dmaengine: rcar-dmac: Update copyright information dmaengine: imx-sdma: Only check ratio on parts that support 1:1 dmaengine: xgene-dma: fix spelling mistake "descripto" -> "descriptor" dmaengine: idma64: Move driver name to the header dmaengine: bcm2835: Drop duplicate capability setting. dmaengine: pl330: _stop: clear interrupt status ...

Merge tag 'tty-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty

2019-05-08T17:07:28Z

Pull tty/serial updates from Greg KH: "Here is the "big" set of tty/serial driver patches for 5.2-rc1. It's really pretty small, not much happening in this portion of the kernel at the moment. When the "highlight" is the movement of the documentation from .txt to .rst files, it's a good merge window. There's a number of small fixes and updates over the various serial drivers, and a new "tty null" driver for those embedded systems that like to make things even smaller and not break things. All of these have been in linux-next for a while with no reported issues" * tag 'tty-5.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (45 commits) tty: serial: add driver for the SiFive UART dt-bindings: serial: add documentation for the SiFive UART driver serial: uartps: Add support for cts-override dt-bindings: xilinx-uartps: Add support for cts-override serial: milbeaut_usio: Fix error handling in probe and remove tty: rocket: deprecate the rp_ioctl tty: rocket: Remove RCPK_GET_STRUCT ioctl tty: update obsolete termios comment tty: serial_core: fix error code returned by uart_register_driver() serial: 8250-mtk: modify baudrate setting serial: 8250-mtk: add follow control docs: serial: convert docs to ReST and rename to *.rst serial: 8250_exar: Adjust IOT2000 matching TTY: serial_core, add ->install serial: Fix using plain integer instead of Null pointer tty:serial_core: Spelling mistake tty: Add NULL TTY driver tty: vt: keyboard: Allow Unicode compose base char Revert "tty: fix NULL pointer issue when tty_port ops is not set" serial: Add Milbeaut serial control ...

Merge tag 'arm64-mmiowb' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

2019-05-06T23:57:52Z

Pull mmiowb removal from Will Deacon: "Remove Mysterious Macro Intended to Obscure Weird Behaviours (mmiowb()) Remove mmiowb() from the kernel memory barrier API and instead, for architectures that need it, hide the barrier inside spin_unlock() when MMIO has been performed inside the critical section. The only relatively recent changes have been addressing review comments on the documentation, which is in a much better shape thanks to the efforts of Ben and Ingo. I was initially planning to split this into two pull requests so that you could run the coccinelle script yourself, however it's been plain sailing in linux-next so I've just included the whole lot here to keep things simple" * tag 'arm64-mmiowb' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (23 commits) docs/memory-barriers.txt: Update I/O section to be clearer about CPU vs thread docs/memory-barriers.txt: Fix style, spacing and grammar in I/O section arch: Remove dummy mmiowb() definitions from arch code net/ethernet/silan/sc92031: Remove stale comment about mmiowb() i40iw: Redefine i40iw_mmiowb() to do nothing scsi/qla1280: Remove stale comment about mmiowb() drivers: Remove explicit invocations of mmiowb() drivers: Remove useless trailing comments from mmiowb() invocations Documentation: Kill all references to mmiowb() riscv/mmiowb: Hook up mmwiob() implementation to asm-generic code powerpc/mmiowb: Hook up mmwiob() implementation to asm-generic code ia64/mmiowb: Add unconditional mmiowb() to arch_spin_unlock() mips/mmiowb: Add unconditional mmiowb() to arch_spin_unlock() sh/mmiowb: Add unconditional mmiowb() to arch_spin_unlock() m68k/io: Remove useless definition of mmiowb() nds32/io: Remove useless definition of mmiowb() x86/io: Remove useless definition of mmiowb() arm64/io: Remove useless definition of mmiowb() ARM/io: Remove useless definition of mmiowb() mmiowb: Hook up mmiowb helpers to spinlocks and generic I/O accessors ...

tty: serial: add driver for the SiFive UART

2019-04-29T14:30:59Z

Add a serial driver for the SiFive UART, found on SiFive FU540 devices (among others). The underlying serial IP block is relatively basic, and currently does not support serial break detection. Further information on the IP block can be found in the documentation and Chisel sources: https://static.dev.sifive.com/FU540-C000-v1.0.pdf https://github.com/sifive/sifive-blocks/tree/master/src/main/scala/devices/uart This driver was written in collaboration with Wesley Terpstra . Tested on a SiFive HiFive Unleashed A00 board, using BBL and the open- source FSBL (using a DT file based on what's targeted for mainline). This revision incorporates changes based on comments by Julia Lawall , Emil Renner Berthing , and Andreas Schwab . Thanks also to Andreas for testing the driver with his userspace and reporting a bug with the set_termios implementation. Signed-off-by: Paul Walmsley Signed-off-by: Paul Walmsley Cc: Greg Kroah-Hartman Cc: Jiri Slaby Cc: Palmer Dabbelt Cc: Wesley Terpstra Cc: linux-serial@vger.kernel.org Cc: linux-riscv@lists.infradead.org Cc: linux-kernel@vger.kernel.org Cc: Julia Lawall Cc: Emil Renner Berthing Cc: Andreas Schwab Signed-off-by: Greg Kroah-Hartman

serial: uartps: Add support for cts-override

2019-04-29T14:20:24Z

Having flow is configurable. Add support for the same by checking for cts-override. Signed-off-by: Shubhrajyoti Datta Signed-off-by: Greg Kroah-Hartman

serial: milbeaut_usio: Fix error handling in probe and remove

2019-04-29T14:20:24Z

devm_clk_get() is used so there is no reason to explicitly call clk_put() in probe or remove functions. Also remove duplicate assign for port->membase. Fixes: ba44dc043004 ("serial: Add Milbeaut serial control") Signed-off-by: Wei Yongjun Tested-by: Sugaya Taichi Signed-off-by: Greg Kroah-Hartman