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@xxxxxxxxx>
Signed-off-by: Matt Ranostay <matt.ranostay@xxxxxxxxxxxx>
---
drivers/iio/proximity/as3935.c | 6 ++----
1 file 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);
--
2.11.0
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