Messages in this thread Patch in this message | | | From | Philippe Langlais <> | Subject | [PATCH] tty: serial: 8250: remove U6715 16550A auto-detection | Date | Tue, 19 Mar 2013 20:50:09 +0100 |
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The auto-detection based on 64 bytes fifo size causes troubles for the identification of the MultiTechZPX Modems (pci 11c1:0480). They loose the ability to do hardware flow control (specifically CTS is never set).
Signed-off-by: Philippe Langlais <philippe.langlais@st.com> --- drivers/tty/serial/8250/8250.c | 9 --------- 1 file changed, 9 deletions(-)
diff --git a/drivers/tty/serial/8250/8250.c b/drivers/tty/serial/8250/8250.c index cf6a538..3255014 100644 --- a/drivers/tty/serial/8250/8250.c +++ b/drivers/tty/serial/8250/8250.c @@ -1026,15 +1026,6 @@ static void autoconfig_16550a(struct uart_8250_port *up) return; } - - /* - * We distinguish between 16550A and U6 16550A by counting - * how many bytes are in the FIFO. - */ - if (up->port.type == PORT_16550A && size_fifo(up) == 64) { - up->port.type = PORT_U6_16550A; - up->capabilities |= UART_CAP_AFE; - } } /* -- 1.7.9.5
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