1 files changed, 11 insertions, 0 deletions

diff --git a/include/linux/regulator/max1586.h b/include/linux/regulator/max1586.h
index 2056973396b6..44563192bf16 100644
--- a/include/linux/regulator/max1586.h
+++ b/include/linux/regulator/max1586.h
@@ -26,6 +26,12 @@
 #define MAX1586_V3 0
 #define MAX1586_V6 1
 
+/* precalculated values for v3_gain */
+#define MAX1586_GAIN_NO_R24   1000000  /* 700000 .. 1475000 mV */
+#define MAX1586_GAIN_R24_3k32 1051098  /* 735768 .. 1550369 mV */
+#define MAX1586_GAIN_R24_5k11 1078648  /* 755053 .. 1591005 mV */
+#define MAX1586_GAIN_R24_7k5  1115432  /* 780802 .. 1645262 mV */
+
 /**
  * max1586_subdev_data - regulator data
  * @id: regulator Id (either MAX1586_V3 or MAX1586_V6)
@@ -43,10 +49,15 @@ struct max1586_subdev_data {
  * @num_subdevs: number of regultors used (may be 1 or 2)
  * @subdevs: regulator used
  *           At most, there will be a regulator for V3 and one for V6 voltages.
+ * @v3_gain: gain on the V3 voltage output multiplied by 1e6.
+ *           This can be calculated as ((1 + R24/R25 + R24/185.5kOhm) * 1e6)
+ *           for an external resistor configuration as described in the
+ *           data sheet (R25=100kOhm).
  */
 struct max1586_platform_data {
         int num_subdevs;
         struct max1586_subdev_data *subdevs;
+        int v3_gain;
 };
 
 #endif