Re: [PATCH] serial: Two branches the same in timbuart_set_mctrl()

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On 03/15/2010 02:33 PM, Roel Kluin wrote:
Hi Richard,

       if (mctrl&   TIOCM_RTS)
           iowrite8(TIMBUART_CTRL_RTS, port->membase + TIMBUART_CTRL);
       else
-        iowrite8(TIMBUART_CTRL_RTS, port->membase + TIMBUART_CTRL);
+        iowrite8(TIMBUART_CTRL_CTS, port->membase + TIMBUART_CTRL);

This is not completely correct. CTS is a read only bit and we are to
stop signal RTS. So the line should look like:
iowrite8(0, port->membase + TIMBUART_CTRL);

It appears as if this will also unset TIMBUART_CTRL_CTS (which is
probably ok since it's read-only) but TIMBUART_CTRL_FLSHTX and
TIMBUART_CTRL_FLSHRX as well.

TIMBUART_CTRL_FLSH(RX/TX) are write only bits, writing a 1 to these will
flush the corresponding FIFO. In this case we should not flush the FIFO:s,
so writing 0 as I suggested is correct.


If not required I'll send the patch as you suggested.

Great! Thanks!

--Richard
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