From mboxrd@z Thu Jan 1 00:00:00 1970 From: NeilBrown Subject: [PATCH 0/3] tty slave device support - version 3. Date: Wed, 18 Mar 2015 16:58:31 +1100 Message-ID: <20150318055437.21025.13990.stgit@notabene.brown> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Return-path: Sender: linux-kernel-owner@vger.kernel.org To: Mark Rutland , One Thousand Gnomes , Peter Hurley , Arnd Bergmann , Greg Kroah-Hartman , Sebastian Reichel , Pavel Machek , Grant Likely , Jiri Slaby Cc: GTA04 owners , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org List-Id: devicetree@vger.kernel.org Hi again, here is version 3 of support for tty-slaves. This version introduces a new bus-type for tty-slaves, and causes a tty-slave device to appear in /sys/devices between the uart and the tty. It effectively intercepts and calls from the tty to the uart (i.e. any tty_operations) and applies extra functionality at that point. Currently the only driver intercepts open and close. It powers on the device on open, and powers off at last-close. Power can be controlled by a regulator or by toggling a GPIO. I think I've incorporated most of the feed back I received from previous versions, but if I missed something - I apologize. If this approach is structurally acceptable then I can fix up all the smaller issues. Thanks for your review, NeilBrown --- NeilBrown (3): TTY: use class_find_device to find port in uart_suspend/resume. TTY: add support for tty_slave devices. tty/slaves: add a driver to power on/off UART attached devices. .../bindings/tty_slave/wi2wi,w2cbw003.txt | 19 + .../bindings/tty_slave/wi2wi,w2sg0004.txt | 37 + .../devicetree/bindings/vendor-prefixes.txt | 1 drivers/tty/Kconfig | 1 drivers/tty/Makefile | 1 drivers/tty/serial/serial_core.c | 21 - drivers/tty/slave/Kconfig | 21 + drivers/tty/slave/Makefile | 4 drivers/tty/slave/serial-power-manager.c | 510 ++++++++++++++++++++ drivers/tty/slave/tty_slave_core.c | 136 +++++ drivers/tty/tty_io.c | 60 ++ include/linux/tty.h | 2 include/linux/tty_slave.h | 26 + 13 files changed, 813 insertions(+), 26 deletions(-) create mode 100644 Documentation/devicetree/bindings/tty_slave/wi2wi,w2cbw003.txt create mode 100644 Documentation/devicetree/bindings/tty_slave/wi2wi,w2sg0004.txt create mode 100644 drivers/tty/slave/Kconfig create mode 100644 drivers/tty/slave/Makefile create mode 100644 drivers/tty/slave/serial-power-manager.c create mode 100644 drivers/tty/slave/tty_slave_core.c create mode 100644 include/linux/tty_slave.h -- Signature