extcon: arizona: No need to switch back down HPDET ranges

No point in revisiting ranges the detection will be no more accurate
the second time simply report that the resistance is right on the
range boundry.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>

diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index f36debffe6e8c8b2c21dd825626b9be08c7fc5d0..4487bdaf9b439c3769341c4233def0762c2a5526 100644 (file)
--- a/drivers/extcon/extcon-arizona.c
+++ b/drivers/extcon/extcon-arizona.c
@@ -441,20 +441,7 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info)
                range = (range & ARIZONA_HP_IMPEDANCE_RANGE_MASK)
                           >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT;
 
-               /* Skip up or down a range? */
-               if (range && (val < arizona_hpdet_c_ranges[range].min)) {
-                       range--;
-                       dev_dbg(arizona->dev, "Moving to HPDET range %d-%d\n",
-                               arizona_hpdet_c_ranges[range].min,
-                               arizona_hpdet_c_ranges[range].max);
-                       regmap_update_bits(arizona->regmap,
-                                          ARIZONA_HEADPHONE_DETECT_1,
-                                          ARIZONA_HP_IMPEDANCE_RANGE_MASK,
-                                          range <<
-                                          ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
-                       return -EAGAIN;
-               }
-
+               /* Skip up a range, or report? */
                if (range < ARRAY_SIZE(arizona_hpdet_c_ranges) - 1 &&
                    (val >= arizona_hpdet_c_ranges[range].max)) {
                        range++;
@@ -468,6 +455,12 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info)
                                           ARIZONA_HP_IMPEDANCE_RANGE_SHIFT);
                        return -EAGAIN;
                }
+
+               if (range && (val < arizona_hpdet_c_ranges[range].min)) {
+                       dev_dbg(arizona->dev, "Reporting range boundary %d\n",
+                               arizona_hpdet_c_ranges[range].min);
+                       val = arizona_hpdet_c_ranges[range].min;
+               }
        }
 
        dev_dbg(arizona->dev, "HP impedance %d ohms\n", val);