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mfd: Allow WM8994 LDO enable pulls to be disabled

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In systems where the LDO enables are always driven (for example, being
connected to an always on supply rail or a GPIO which is driven by the
CPU even in suspend) then we can disable the pull downs on the LDO for
a small power savings.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Mark Brown 2011-08-22 15:43:55 +02:00 • committed by Samuel Ortiz
commit 881de67046
3 changed files with 28 additions and 0 deletions
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7
include/linux/mfd/wm8994/pdata.h
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@ -167,6 +167,13 @@ struct wm8994_pdata {
/* WM8958 microphone bias configuration */
int micbias[2];
/* Disable the internal pull downs on the LDOs if they are
* always driven (eg, connected to an always on supply or
* GPIO that always drives an output. If they float power
* consumption will rise.
*/
bool ldo_ena_always_driven;
};
#endif