arch/arm/mach-ux500/board-u5500.c: calibrate ALS input voltage

Provide the support for auto calibration of ALS Zone boundaries based on
min/max ALS input voltage.

Signed-off-by: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/led-lm3530.h b/include/linux/led-lm3530.h
index 58592fa67d24..8eb12357a110 100644
--- a/include/linux/led-lm3530.h
+++ b/include/linux/led-lm3530.h
@@ -84,6 +84,8 @@ enum lm3530_als_mode {
  * @brt_ramp_rise: rate of rise of led current
  * @als1_resistor_sel: internal resistance from ALS1 input to ground
  * @als2_resistor_sel: internal resistance from ALS2 input to ground
+ * @als_vmin: als input voltage calibrated for max brightness in mV
+ * @als_vmax: als input voltage calibrated for min brightness in mV
  * @brt_val: brightness value (0-255)
  */
 struct lm3530_platform_data {
@@ -101,6 +103,9 @@ struct lm3530_platform_data {
         u8 als1_resistor_sel;
         u8 als2_resistor_sel;
 
+        u32 als_vmin;
+        u32 als_vmax;
+
         u8 brt_val;
 };