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Revert "OMAP: UART: Keep the TX fifo full when possible"
This reverts commit c441508421
.
Kevin writes:
Hmm, another OMAP serial patch that wasn't Cc'd to linux-omap
where OMAP users might have seen it. :(
I just bisected a strange problem in linux-next on OMAP3 down to
this patch. Reverting it fixes the problem.
On OMAP3530 Beagle and Overo, after boot, doing a 'cat
/proc/cpuinfo' was not returning to a prompt, suggesting
something strange with the FIFO. Hitting return gets me back to
a prompt.
Greg, this one should also be dropped from tty-next until it can
be further investgated and the problem solved.
Reported-by: Kevin Hilman <khilman@linaro.org>
Cc: Dmitry Fink <finik@ti.com>
Cc: Alexander Savchenko <oleksandr.savchenko@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
7b013e440a
commit
355fe568e2
2 changed files with 1 additions and 3 deletions
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@ -350,8 +350,7 @@ static void transmit_chars(struct uart_omap_port *up, unsigned int lsr)
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serial_omap_stop_tx(&up->port);
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return;
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}
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count = up->port.fifosize -
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(serial_in(up, UART_OMAP_TXFIFO_LVL) & 0xFF);
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count = up->port.fifosize / 4;
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do {
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serial_out(up, UART_TX, xmit->buf[xmit->tail]);
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xmit->tail = (xmit->tail + 1) & (UART_XMIT_SIZE - 1);
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@ -366,7 +366,6 @@
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#define UART_OMAP_MDR1_FIR_MODE 0x05 /* FIR mode */
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#define UART_OMAP_MDR1_CIR_MODE 0x06 /* CIR mode */
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#define UART_OMAP_MDR1_DISABLE 0x07 /* Disable (default state) */
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#define UART_OMAP_TXFIFO_LVL 0x1A /* TX FIFO fullness */
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/*
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* These are definitions for the Exar XR17V35X and XR17(C|D)15X
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