Messages in this thread | | | From | NeilBrown <> | Date | Wed, 18 Mar 2015 16:58:31 +1100 | Subject | [PATCH 0/3] tty slave device support - version 3. |
| |
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
| |