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authorCharles Keepax <ckeepax@opensource.wolfsonmicro.com>2013-11-14 16:18:24 +0000
committerChanwoo Choi <cw00.choi@samsung.com>2014-01-07 11:54:28 +0900
commit9141461d81717ef94b7d38a4b3581114ac1307db (patch)
tree38e247728f5aacdf7ef156dc8ba8de9c84122cf5 /drivers/extcon
parent31a847e6e1ed4db5002a4af191988aa85008c407 (diff)
downloadlinux-9141461d81717ef94b7d38a4b3581114ac1307db.tar.bz2
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>
Diffstat (limited to 'drivers/extcon')
-rw-r--r--drivers/extcon/extcon-arizona.c21
1 files changed, 7 insertions, 14 deletions
diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c
index f36debffe6e8..4487bdaf9b43 100644
--- 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);