Hello, 2016-01-16 2:55 GMT+03:00 Peter Hurley <pe...@hurleysoftware.com>: > Please use the helpers in serial_mctrl_gpio.c if you try this. > > And please build on top of Matwey's patches, as those will likely be > the rs485 implementation for the 8250_omap driver soon.
As far as I understand, since em485 callbacks are invoked by timers, the code is to be executed in atomic context. However certain GPIO controllers (particularly the OMAP-based one which is used on our AM335x) require the use of the gpio_*_cansleep() functions, and cannot work with the atomic-friendly non-cansleep ones. Do the aforementioned helpers in serial_mctrl_gpio.c address this issue? Regards, Ilyas G.