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serial: imx: enable the clocks only when the uart is used
authorHuang Shijie <b32955@freescale.com>
Tue, 4 Jun 2013 01:59:33 +0000 (09:59 +0800)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 6 Jun 2013 20:05:38 +0000 (13:05 -0700)
Current code opens the clocks when the uart driver is probed.
This will wastes some power if several uarts are enabled, but not really
used.

So close these clocks for uart, and enable the clocks only when
the uart is used.

Signed-off-by: Huang Shijie <b32955@freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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