On Wed, Mar 18, 2020 at 03:26:35PM +0100, Heiko Stuebner wrote: > From: Heiko Stuebner <heiko.stuebner@xxxxxxxxxxxxxxxxxxxxx> > > In cases where a serial register needs to be polled until a specific > state, this should have a timeout as noted in the thread bringing em485 > support to 8250_dw. > > To not re-implement timeout handling in each case, add a helper modelled > after readx_poll_timeout / regmap_read_poll_timeout to facilitate this. > +#define serial_in_poll_timeout(port, offs, val, cond, timeout_us) \ This can (re-)use readx_poll_timeout(). Example: https://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git/commit/?h=testing&id=b0415c224926c6d94c778d72f3d44c83862eb214 -- With Best Regards, Andy Shevchenko
