$ git am --whitespace=fix ~/sserial_updates.patch
Applying: Add support for second user register in Smart Serial, and improve the handling of errors.
/tmp/emc2-dev/.git/rebase-apply/patch:18: trailing whitespace.
digital I/O pin.  By default all Module instances with the exception of
/tmp/emc2-dev/.git/rebase-apply/patch:19: trailing whitespace.
SmartSerial are enabled, and all the board's pins are used by the Module
/tmp/emc2-dev/.git/rebase-apply/patch:47: trailing whitespace.
port pins, three parameters and a further 7 pins shared between all ports used
/tmp/emc2-dev/.git/rebase-apply/patch:65: trailing whitespace.
(u32, ro) .error-count: Indicates the state of the Smart Serial error handler,
/tmp/emc2-dev/.git/rebase-apply/patch:66: trailing whitespace.
see the parameters sections for more details.
error: patch failed: src/hal/drivers/mesa-hostmot2/hostmot2.h:516
error: src/hal/drivers/mesa-hostmot2/hostmot2.h: patch does not apply
error: src/hal/drivers/mesa-hostmot2/mesa_other_sserial.c: does not exist in index
Patch failed at 0001 Add support for second user register in Smart Serial, and improve the handling of errors.
When you have resolved this problem run "git am --resolved".
If you would prefer to skip this patch, instead run "git am --skip".
To restore the original branch and stop patching run "git am --abort".