Omanakuttan wrote:
Hi,
in kernel 2.4.17, arch/ppc/8260/uart.c contains the following lines in rs_8xx_stop()
{
....
sccp->scc_sccm &= ~UART_SCCM_TX;
^ Did you noticed that?
....
}
UART_SCCM_TX is defined to 0x00000020
i.e, only the TX bit is 1
Now the manual (MPC8260UM.pdf) states that clearing a bit is 1 for both SCCE and SCCM. Following it, what I understand is the above C statement clears all the bits of ccp->scc_sccm except TX bit.
Then how does it stop the SCC/SCM?
Clearly something is wrong in _my_ logic, what can that be?
Thanks for your time,
Om.
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