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| author | Matt Ranostay <matt.ranostay@konsulko.com> | 2017-04-15 01:38:19 +0200 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2017-04-26 08:06:31 +0200 |
| commit | 6272c0de13abf1480f701d38288f28a11b4301c4 (patch) | |
| tree | 277d6a6717ed9c98674b4ef2e1a8f69b1a10e865 /drivers/iio/proximity | |
| parent | staging/android: Update Ion TODO list (diff) | |
| download | linux-6272c0de13abf1480f701d38288f28a11b4301c4.tar.xz linux-6272c0de13abf1480f701d38288f28a11b4301c4.zip | |
iio: proximity: as3935: recalibrate RCO after resume
According to the datasheet the RCO must be recalibrated
on every power-on-reset. Also remove mutex locking in the
calibration function since callers other than the probe
function (which doesn't need it) will have a lock.
Fixes: 24ddb0e4bba4 ("iio: Add AS3935 lightning sensor support")
Cc: George McCollister <george.mccollister@gmail.com>
Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/proximity')
| -rw-r--r-- | drivers/iio/proximity/as3935.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/drivers/iio/proximity/as3935.c b/drivers/iio/proximity/as3935.c index ddf9bee89f77..d0f5e53aad59 100644 --- a/drivers/iio/proximity/as3935.c +++ b/drivers/iio/proximity/as3935.c @@ -269,8 +269,6 @@ static irqreturn_t as3935_interrupt_handler(int irq, void *private) static void calibrate_as3935(struct as3935_state *st) { - mutex_lock(&st->lock); - /* mask disturber interrupt bit */ as3935_write(st, AS3935_INT, BIT(5)); @@ -280,8 +278,6 @@ static void calibrate_as3935(struct as3935_state *st) mdelay(2); as3935_write(st, AS3935_TUNE_CAP, (st->tune_cap / TUNE_CAP_DIV)); - - mutex_unlock(&st->lock); } #ifdef CONFIG_PM_SLEEP @@ -318,6 +314,8 @@ static int as3935_resume(struct device *dev) val &= ~AS3935_AFE_PWR_BIT; ret = as3935_write(st, AS3935_AFE_GAIN, val); + calibrate_as3935(st); + err_resume: mutex_unlock(&st->lock); |