mfd: Export ISEL values from WM831x core

The current settings which can be used with the WM831x current sinks
can't easily be mapped between register values and currents at run
time without a lookup table since the values scale logarithmically
to match the way the human eye interprets brightness. This lookup
table is inclided in the core since several drivers need to use it.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 64 insertions, 0 deletions

diff --git a/drivers/mfd/wm831x-core.c b/drivers/mfd/wm831x-core.c
index 33eaea2f988e..49b7885c2702 100644
--- a/drivers/mfd/wm831x-core.c
+++ b/drivers/mfd/wm831x-core.c
@@ -24,6 +24,70 @@
 #include <linux/mfd/wm831x/irq.h>
 #include <linux/mfd/wm831x/auxadc.h>
 #include <linux/mfd/wm831x/otp.h>
+#include <linux/mfd/wm831x/regulator.h>
+
+/* Current settings - values are 2*2^(reg_val/4) microamps.  These are
+ * exported since they are used by multiple drivers.
+ */
+int wm831x_isinkv_values[WM831X_ISINK_MAX_ISEL] = {
+        2,
+        2,
+        3,
+        3,
+        4,
+        5,
+        6,
+        7,
+        8,
+        10,
+        11,
+        13,
+        16,
+        19,
+        23,
+        27,
+        32,
+        38,
+        45,
+        54,
+        64,
+        76,
+        91,
+        108,
+        128,
+        152,
+        181,
+        215,
+        256,
+        304,
+        362,
+        431,
+        512,
+        609,
+        724,
+        861,
+        1024,
+        1218,
+        1448,
+        1722,
+        2048,
+        2435,
+        2896,
+        3444,
+        4096,
+        4871,
+        5793,
+        6889,
+        8192,
+        9742,
+        11585,
+        13777,
+        16384,
+        19484,
+        23170,
+        27554,
+};
+EXPORT_SYMBOL_GPL(wm831x_isinkv_values);
 
 enum wm831x_parent {
         WM8310 = 0,