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>

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