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[SERIAL] Update parity handling documentation

Update documentation to match reality. INPCK controls whether input
parity checking is enabled.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

authored by Peter Korsgaard and committed by Russell King 89f3da3e ba8f5bab

+5 -4
unified split
+5 -4
Documentation/serial/driver
··· 214 214 The interaction of the iflag bits is as follows (parity error 215 215 given as an example): 216 216 Parity error INPCK IGNPAR 217 - None n/a n/a character received 218 - Yes n/a 0 character discarded 219 - Yes 0 1 character received, marked as 217 + n/a 0 n/a character received, marked as 220 218 TTY_NORMAL 221 - Yes 1 1 character received, marked as 219 + None 1 n/a character received, marked as 220 + TTY_NORMAL 221 + Yes 1 0 character received, marked as 222 222 TTY_PARITY 223 + Yes 1 1 character discarded 223 224 224 225 Other flags may be used (eg, xon/xoff characters) if your 225 226 hardware supports hardware "soft" flow control.