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tty: serial: msm_serial: code cleanup in msm_console_setup
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The change does following:
 - baud, flow, bits, parity were being overwritten as they were
   being reinitialized after parsing.  Initialize them when they are
   declared so that user provided setting are not overwritten.
 - msm_set_baud_rate() is anyway called in uart_set_options when it calls
   msm_set_termios(). msm_reset() is called when we change the baud rate.
   Hence doing away with both of these calls.
 - CR_CMD_PROTECTION_EN and CR_TX_ENABLE settings are done in msm_set_baud_rate.
   So do away with this here.

Signed-off-by: Pramod Gurav <pramod.gurav@smartplayin.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pramod Gurav authored and Greg Kroah-Hartman committed Feb 2, 2015
1 parent 0a0d412 commit 4daba33
Showing 1 changed file with 4 additions and 20 deletions.
24 changes: 4 additions & 20 deletions drivers/tty/serial/msm_serial.c
Original file line number Diff line number Diff line change
Expand Up @@ -920,14 +920,15 @@ static void msm_console_write(struct console *co, const char *s,
static int __init msm_console_setup(struct console *co, char *options)
{
struct uart_port *port;
struct msm_port *msm_port;
int baud = 0, flow, bits, parity;
int baud = 115200;
int bits = 8;
int parity = 'n';
int flow = 'n';

if (unlikely(co->index >= UART_NR || co->index < 0))
return -ENXIO;

port = get_port_from_line(co->index);
msm_port = UART_TO_MSM(port);

if (unlikely(!port->membase))
return -ENXIO;
Expand All @@ -937,23 +938,6 @@ static int __init msm_console_setup(struct console *co, char *options)
if (options)
uart_parse_options(options, &baud, &parity, &bits, &flow);

bits = 8;
parity = 'n';
flow = 'n';
msm_write(port, UART_MR2_BITS_PER_CHAR_8 | UART_MR2_STOP_BIT_LEN_ONE,
UART_MR2); /* 8N1 */

if (baud < 300 || baud > 115200)
baud = 115200;
msm_set_baud_rate(port, baud);

msm_reset(port);

if (msm_port->is_uartdm) {
msm_write(port, UART_CR_CMD_PROTECTION_EN, UART_CR);
msm_write(port, UART_CR_TX_ENABLE, UART_CR);
}

pr_info("msm_serial: console setup on port #%d\n", port->line);

return uart_set_options(port, co, baud, parity, bits, flow);
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