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serial: sh-sci: Fix up PORT_SCI console output ordering.

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Fix SCI transmission sequence in console output function.

This reorders the write sequence to match the SH-3 manual, and corrects
a console corruption bug observed on SH-3 SCI.

Signed-off-by: Toshinobu Sugioka <sugioka@itonet.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
SUGIOKA Toshinobu 2009-06-01 03:53:41 +00:00 committed by Paul Mundt
parent 4778541470
commit dd0a3e77c8
1 changed files with 1 additions and 2 deletions
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3
drivers/serial/sh-sci.c
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@ -151,9 +151,8 @@ static void sci_poll_put_char(struct uart_port *port, unsigned char c)
status = sci_in(port, SCxSR); status = sci_in(port, SCxSR);
} while (!(status & SCxSR_TDxE(port))); } while (!(status & SCxSR_TDxE(port)));
sci_in(port, SCxSR); /* Dummy read */
sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port));
sci_out(port, SCxTDR, c); sci_out(port, SCxTDR, c);
sci_out(port, SCxSR, SCxSR_TDxE_CLEAR(port) & ~SCxSR_TEND(port));
} }
#endif /* CONFIG_CONSOLE_POLL || CONFIG_SERIAL_SH_SCI_CONSOLE */ #endif /* CONFIG_CONSOLE_POLL || CONFIG_SERIAL_SH_SCI_CONSOLE */