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* tty/serdev: add serdev registration interfaceJohan Hovold2017-05-181-2/+5
| | | | | | | | | | | | | | | Add a new interface for registering a serdev controller and clients, and a helper function to deregister serdev devices (or a tty device) that were previously registered using the new interface. Once every driver currently using the tty_port_register_device() helpers have been vetted and converted to use the new serdev registration interface (at least for deregistration), we can move serdev registration to the current helpers and get rid of the serdev-specific functions. Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serdev: Restore serdev_device_write_buf for atomic contextStefan Wahren2017-05-181-7/+7
| | | | | | | | | | | | | Starting with commit 6fe729c4bdae ("serdev: Add serdev_device_write subroutine") the function serdev_device_write_buf cannot be used in atomic context anymore (mutex_lock is sleeping). So restore the old behavior. Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Fixes: 6fe729c4bdae ("serdev: Add serdev_device_write subroutine") Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Johan Hovold <johan@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* Merge tag 'tty-4.12-rc1' of ↵Linus Torvalds2017-05-081-4/+17
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty Pull tty/serial updates from Greg KH: "Here is the "big" TTY/Serial patch updates for 4.12-rc1 Not a lot of new things here, the normal number of serial driver updates and additions, tiny bugs fixed, and some core files split up to make future changes a bit easier for Nicolas's "tiny-tty" work. All of these have been in linux-next for a while" * tag 'tty-4.12-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (62 commits) serial: small Makefile reordering tty: split job control support into a file of its own tty: move baudrate handling code to a file of its own console: move console_init() out of tty_io.c serial: 8250_early: Add earlycon support for Palmchip UART tty: pl011: use "qdf2400_e44" as the earlycon name for QDF2400 E44 vt: make mouse selection of non-ASCII consistent vt: set mouse selection word-chars to gpm's default imx-serial: Reduce RX DMA startup latency when opening for reading serial: omap: suspend device on probe errors serial: omap: fix runtime-pm handling on unbind tty: serial: omap: add UPF_BOOT_AUTOCONF flag for DT init serial: samsung: Remove useless spinlock serial: samsung: Add missing checks for dma_map_single failure serial: samsung: Use right device for DMA-mapping calls serial: imx: setup DCEDTE early and ensure DCD and RI irqs to be off tty: fix comment typo s/repsonsible/responsible/ tty: amba-pl011: Fix spurious TX interrupts serial: xuartps: Enable clocks in the pm disable case also serial: core: Re-use struct uart_port {name} field ...
| * serdev: Add serdev_device_write subroutineAndrey Smirnov2017-04-081-2/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add serdev_device_write() a blocking call allowing to transfer arbitraty amount of data (potentially exceeding amount that serdev_device_write_buf can process in a single call) To support that, also add serdev_device_write_wakeup(). Drivers wanting to use full extent of serdev_device_write functionality are expected to provide serdev_device_write_wakeup() as a sole handler of .write_wakeup event or call it as a part of driver's custom .write_wakeup code. Because serdev_device_write() subroutine is a superset of serdev_device_write_buf() the patch re-impelements latter is terms of the former. For drivers wanting to just use serdev_device_write_buf() .write_wakeup handler is optional. Cc: cphealy@gmail.com Cc: Guenter Roeck <linux@roeck-us.net> Cc: linux-serial@vger.kernel.org Cc: linux-kernel@vger.kernel.org Reviewed-by: Rob Herring <robh@kernel.org> Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| * linux/serdev.h: Replace 'ctrl->serdev' with 'serdev'Andrey Smirnov2017-03-171-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | Replace 'ctrl->serdev' with 'serdev' in serdev_controller_write_wakeup() and serdev_controller_receive_buf(). Cc: Rob Herring <robh@kernel.org> Cc: cphealy@gmail.com Cc: linux-serial@vger.kernel.org Cc: linux-kernel@vger.kernel.org Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | serdev: add helpers for cts and rts handlingSebastian Reichel2017-04-121-0/+31
| | | | | | | | | | | | | | | | | | | | Add serdev helper functions for handling of cts and rts lines using the serdev's tiocm functions. Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Sebastian Reichel <sre@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
* | serdev: implement get/set tiocmSebastian Reichel2017-04-121-0/+13
| | | | | | | | | | | | | | | | | | | | Add method for getting and setting tiocm. Acked-by: Pavel Machek <pavel@ucw.cz> Acked-by: Rob Herring <robh@kernel.org> Signed-off-by: Sebastian Reichel <sre@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
* | serdev: add serdev_device_wait_until_sentSebastian Reichel2017-04-121-0/+3
|/ | | | | | | | | | | | Add method, which waits until the transmission buffer has been sent. Note, that the change in ttyport_write_wakeup is related, since tty_wait_until_sent will hang without that change. Acked-by: Rob Herring <robh@kernel.org> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Sebastian Reichel <sre@kernel.org> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
* serdev: add a tty port controller driverRob Herring2017-02-031-0/+21
| | | | | | | | | | | | | Add a serdev controller driver for tty ports. The controller is registered with serdev when tty ports are registered with the TTY core. As the TTY core is built-in only, this has the side effect of making serdev built-in as well. Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-By: Sebastian Reichel <sre@kernel.org> Tested-By: Sebastian Reichel <sre@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* serdev: Introduce new bus for serial attached devicesRob Herring2017-02-031-0/+241
The serdev bus is designed for devices such as Bluetooth, WiFi, GPS and NFC connected to UARTs on host processors. Tradionally these have been handled with tty line disciplines, rfkill, and userspace glue such as hciattach. This approach has many drawbacks since it doesn't fit into the Linux driver model. Handling of sideband signals, power control and firmware loading are the main issues. This creates a serdev bus with controllers (i.e. host serial ports) and attached devices. Typically, these are point to point connections, but some devices have muxing protocols or a h/w mux is conceivable. Any muxing is not yet supported with the serdev bus. Signed-off-by: Rob Herring <robh@kernel.org> Reviewed-By: Sebastian Reichel <sre@kernel.org> Tested-By: Sebastian Reichel <sre@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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