diff options
| author | Charles Keepax <ckeepax@opensource.wolfsonmicro.com> | 2015-09-16 11:42:18 +0200 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2015-09-22 08:27:59 +0200 |
| commit | f719ae3311f9b609151a0319f0cc2fdb7491d37a (patch) | |
| tree | 1ae0906efed7d6435f43e2388f564f3641af44b7 /drivers/extcon | |
| parent | extcon: arizona: Add support for general purpose switch (diff) | |
| download | linux-f719ae3311f9b609151a0319f0cc2fdb7491d37a.tar.xz linux-f719ae3311f9b609151a0319f0cc2fdb7491d37a.zip | |
extcon: arizona: Additional settings to improve accuracy of HP detect
If the TST_CAP_SEL bits aren't set correctly on wm5110/8280 there will
be a 100k load along side the headphones, which will affect the accurary
towards the very top of the detection range. This patch sets those bits.
Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/extcon')
| -rw-r--r-- | drivers/extcon/extcon-arizona.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/drivers/extcon/extcon-arizona.c b/drivers/extcon/extcon-arizona.c index d719ee724651..6d35147b1d6c 100644 --- a/drivers/extcon/extcon-arizona.c +++ b/drivers/extcon/extcon-arizona.c @@ -43,6 +43,9 @@ #define ARIZONA_MICD_CLAMP_MODE_JDL_GP5H 0x9 #define ARIZONA_MICD_CLAMP_MODE_JDH_GP5H 0xb +#define ARIZONA_TST_CAP_DEFAULT 0x3 +#define ARIZONA_TST_CAP_CLAMP 0x1 + #define ARIZONA_HPDET_MAX 10000 #define HPDET_DEBOUNCE 500 @@ -147,6 +150,7 @@ static void arizona_extcon_hp_clamp(struct arizona_extcon_info *info, { struct arizona *arizona = info->arizona; unsigned int mask = 0, val = 0; + unsigned int cap_sel = 0; int ret; switch (arizona->type) { @@ -154,10 +158,21 @@ static void arizona_extcon_hp_clamp(struct arizona_extcon_info *info, case WM8280: mask = ARIZONA_HP1L_SHRTO | ARIZONA_HP1L_FLWR | ARIZONA_HP1L_SHRTI; - if (clamp) + if (clamp) { val = ARIZONA_HP1L_SHRTO; - else + cap_sel = ARIZONA_TST_CAP_CLAMP; + } else { val = ARIZONA_HP1L_FLWR | ARIZONA_HP1L_SHRTI; + cap_sel = ARIZONA_TST_CAP_DEFAULT; + } + + ret = regmap_update_bits(arizona->regmap, + ARIZONA_HP_TEST_CTRL_1, + ARIZONA_HP1_TST_CAP_SEL_MASK, + cap_sel); + if (ret != 0) + dev_warn(arizona->dev, + "Failed to set TST_CAP_SEL: %d\n", ret); break; default: mask = ARIZONA_RMV_SHRT_HP1L; |