Eli Brin wrote: > Hello, > > I have noticed, in kernel 2.4.20, that SCC1 and SCC4 cannot be configured as > uarts. > > Also, the configuration for RTS,CTS,DCD and DTR are missing. > > Comparing 8xx_io/uart.c file to the 2.4.4 version of uart.c shows that all > the code to support the above has been removed, although both show driver > 0.3. > > Our target will use all SCC's as uarts with hardware handshake. So I will > need to put this back into uart.c and the config.in files. > > Is there a reason for this feature (SCC1 and SCC4 as uarts are part of the > 8xx ability) being removed ?
They haven't been removed! This feature just never made it into the official BitKeeper tree. Have a look at linuxppc_2_4_devel in the DENX CVS. Especialy between the labels LABEL_2003_03_11_2045 and LABEL_2003_03_11_2055! BTW: Make sure you understood the "hardware handshake" done by the MPC8xx! MPC8xx CTS/RTS have a different meaning than you might expect when dealing with real UARTS! Basicly the only support flow control in one direction! So a device can throttle the MPC. But the MPC can _not_ stop the device from sending more! Hope this helps. Steven ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/
