diff options
| author | Charles Keepax <ckeepax@opensource.wolfsonmicro.com> | 2014-05-30 13:19:17 +0100 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2014-06-16 13:33:19 +0900 |
| commit | 24a279b1cae0af0eb4bf0dd8b3ef85956a96ff7a (patch) | |
| tree | 6dcf3da94e99ecd5029c0773602e25ef88f8a6e2 /drivers/extcon | |
| parent | e368f525218497a9943b61301148d30382c1e014 (diff) | |
| download | linux-24a279b1cae0af0eb4bf0dd8b3ef85956a96ff7a.tar.bz2 | |
extcon: arizona: Update manual headphone detection calculation
The higher levels of impedance have a higher minimum value than the
first level. As the same value was used for all levels, higher impedances
were reported with a very low level of accuracy. This patch applies the
approriate lower threshold for each level, whilst we are changing things
add a define for the maximum value at each level to improve readability.
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.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index c6347965c639..c2eed30cfc3a 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -329,14 +329,17 @@ static void arizona_stop_mic(struct arizona_extcon_info *info) } static struct { + unsigned int threshold; unsigned int factor_a; unsigned int factor_b; } arizona_hpdet_b_ranges[] = { - { 5528, 362464 }, - { 11084, 6186851 }, - { 11065, 65460395 }, + { 100, 5528, 362464 }, + { 169, 11084, 6186851 }, + { 169, 11065, 65460395 }, }; +#define ARIZONA_HPDET_B_RANGE_MAX 0x3fb + static struct { int min; int max; @@ -391,7 +394,8 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info) >> ARIZONA_HP_IMPEDANCE_RANGE_SHIFT; if (range < ARRAY_SIZE(arizona_hpdet_b_ranges) - 1 && - (val < 100 || val >= 0x3fb)) { + (val < arizona_hpdet_b_ranges[range].threshold || + val >= ARIZONA_HPDET_B_RANGE_MAX)) { range++; dev_dbg(arizona->dev, "Moving to HPDET range %d\n", range); @@ -404,7 +408,8 @@ static int arizona_hpdet_read(struct arizona_extcon_info *info) } /* If we go out of range report top of range */ - if (val < 100 || val >= 0x3fb) { + if (val < arizona_hpdet_b_ranges[range].threshold || + val >= ARIZONA_HPDET_B_RANGE_MAX) { dev_dbg(arizona->dev, "Measurement out of range\n"); return ARIZONA_HPDET_MAX; } |