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authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-08-22 15:43:55 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2011-10-24 14:09:10 +0200
commit881de67046f424fc3a6e05b1c681c12afd94e802 (patch)
tree3f83b7d051532c785a598d442daa64267c2be210 /include/linux/mfd
parent862de70c12bb6227943e155251c75e7fa4558068 (diff)
mfd: Allow WM8994 LDO enable pulls to be disabled
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>
Diffstat (limited to 'include/linux/mfd')
-rw-r--r--include/linux/mfd/wm8994/core.h2
-rw-r--r--include/linux/mfd/wm8994/pdata.h7
2 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/mfd/wm8994/core.h b/include/linux/mfd/wm8994/core.h
index f0b69cdae41..5ab71bd76f9 100644
--- a/include/linux/mfd/wm8994/core.h
+++ b/include/linux/mfd/wm8994/core.h
@@ -63,6 +63,8 @@ struct wm8994 {
void *control_data;
+ bool ldo_ena_always_driven;
+
int gpio_base;
int irq_base;
diff --git a/include/linux/mfd/wm8994/pdata.h b/include/linux/mfd/wm8994/pdata.h
index 97cf4f27d64..ea32f306dca 100644
--- a/include/linux/mfd/wm8994/pdata.h
+++ b/include/linux/mfd/wm8994/pdata.h
@@ -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