On Wed, Aug 2, 2017 at 2:12 PM, Danilo Krummrich <danilokrummrich@xxxxxxxxxxxxx> wrote: > This driver provides PS/2 serio bus support by implementing bit banging > with the GPIO API. The GPIO pins, data and clock, can be configured with > a node in the device tree or by generic device properties (GDP). > > Writing to a device is supported as well, though it is not recommended as > the timings to be halt given by libps2 are very tough and difficult to > reach with bit banging. Therefore it can be configured (also in DT and > GDP) whether the serio write function should be available for clients. > > This driver is for development purposes and not for productive use. > However, this driver can be useful e.g. when no USB port is available or > using old peripherals is desired as PS/2 controller chips getting rare. > > This driver was tested on RPI1 and on Hikey960 and it worked well together > with the atkbd driver. > > Signed-off-by: Danilo Krummrich <danilokrummrich@xxxxxxxxxxxxx> > --- > v2: Removed one verbose print statement, changed another one to dev_dbg. > v3: - fixed compiler warning on blackfin > - depends on GPIOLIB > - clarify documentation > v4: - fixed concurrent calls to ps2_gpio_write (serio->write) > - use gpiod API > - use generic device properties > - request irq separately, do not use gpiod_to_irq > - abort when gpio is connected via slow bus > - Fixed a bug where PS2_CMD_RESEND is always send after tx failed once. > The makes the write functionallity work better, tough timing is still > critical. > - disable irq initially until ps2_gpip_open (serio->open) is called Oh there is a new version of this patch. This is better, some review comments from my old review still holds. Yours, Linus Walleij -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
