diff options
| author | Soren Brinkmann <soren.brinkmann@xilinx.com> | 2014-04-04 17:23:40 -0700 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-04-24 16:21:50 -0700 |
| commit | 5ce15d2d1efb9cacab9a331c730cc805124ee612 (patch) | |
| tree | b8dc31859e0800fd8d1c73f948a249b7afe959b3 /drivers/tty/serial/xilinx_uartps.c | |
| parent | e555a21149806b21ae63ba0b02d42ce100db5639 (diff) | |
tty: xuartps: Print warning in clock notifier
Print a warning if the clock notifier rejects a clock frequency change
to facilitate debugging (see:
http://thread.gmane.org/gmane.linux.ports.arm.kernel/304329/focus=304379)
Signed-off-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Tested-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/serial/xilinx_uartps.c')
| -rw-r--r-- | drivers/tty/serial/xilinx_uartps.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/tty/serial/xilinx_uartps.c b/drivers/tty/serial/xilinx_uartps.c index 787a12064fa0..814391038abb 100644 --- a/drivers/tty/serial/xilinx_uartps.c +++ b/drivers/tty/serial/xilinx_uartps.c @@ -429,8 +429,10 @@ static int xuartps_clk_notifier_cb(struct notifier_block *nb, * frequency. */ if (!xuartps_calc_baud_divs(ndata->new_rate, xuartps->baud, - &bdiv, &cd, &div8)) + &bdiv, &cd, &div8)) { + dev_warn(port->dev, "clock rate change rejected\n"); return NOTIFY_BAD; + } spin_lock_irqsave(&xuartps->port->lock, flags); |