On Wed, Oct 19, 2011 at 11:05 AM, Mohammed, Afzal [off-list ref] wrote:

Hi Govindraj,

On Tue, Oct 18, 2011 at 21:05:41, R, Govindraj wrote:

quoted

If OMAP UART is used as console uart and debug is enabled,
avoid gating of uart clocks to print all debug prints.

:
:

quoted

? ? ? ? ? ? ? ? ? ? ? console_uart_id = uart->num;

+ ? ? ? ? ? ? ? ? ? ? if (cmdline_find_option("debug")) {
+ ? ? ? ? ? ? ? ? ? ? ? ? ? ? uart_debug = true;

Shouldn't "loglevel" also be checked?

Might not be necessary,

loglevel only sets the option in console driver how a printk should be handled
from vprintk so any printk should be to sent to console or to syslogd action
where it will be buffered to a file(var/log/messages).

Any print's with any log level should be handled and printed to console.

consider below path below path

uart->ops
 -> runtime_get_sync
      -> omap_device_enable
          -> clock_enable

All the prints in given path are dev_dbgs for which we need debug to be set from
command line argument.

As stated in change log any dev_dbg prints from these path can be
redirect to uart->ops
so even before our clock was enabled we got redirected back to uart code.

So for dev_dbg prints from above path we need debug to be set from command-line
and we can prevent uart clock gating to this scenario.

--
Govindraj.R