Hello Geert, On Mon, Mar 06, 2017 at 09:49:39AM +0100, Geert Uytterhoeven wrote: > > Given that mctrl-gpio can be useful on legacy platforms, a device could > > silently run without cts-gpio even there. > > On platforms were CONFIG_GPIOLIB=n, this is not true, so the issue is moot. > > All serial drivers using (optional) mctrl-gpio have this in Kconfig: > > select SERIAL_MCTRL_GPIO if GPIOLIB > > So they will use mctrl-gpio when GPIOLIB is enabled. > If GPIOPLIB is disabled, no flow control GPIOs are expected, and the > driver should not break that case.
So it all boils down to the question: Is GPIOLIB=n enough to assume no gpio is needed? I'd say it is not. Best regards Uwe -- Pengutronix e.K. | Uwe Kleine-König | Industrial Linux Solutions | http://www.pengutronix.de/ |
