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iio: magnetometer: st_magn: fix drdy line configuration for LIS3MDL

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Data-ready line in LIS3MDL is routed to drdy pin and it is not possible
to select a different INT pin. st_sensors_set_dataready_irq() assumes
that if drdy int address is not exported in register map, irq trigger
is not supported by the sensor and hw_irq_trigger is always false.
Based on this configuration st_sensors_irq_thread does not consume
generated interrupt causing an unhandled irq.
Fix this taking into account status register address in
st_sensors_set_dataready_irq()

Fixes: 90efe05562 (iio: st_sensors: harden interrupt handling)
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Lorenzo Bianconi 2017-08-29 13:45:11 +02:00 committed by Jonathan Cameron
parent 3af75db12e
commit c65e3d6ef4
2 changed files with 14 additions and 1 deletions
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11
drivers/iio/common/st_sensors/st_sensors_core.c
View File

@ -463,8 +463,17 @@ int st_sensors_set_dataready_irq(struct iio_dev *indio_dev, bool enable)
u8 drdy_mask;
struct st_sensor_data *sdata = iio_priv(indio_dev);
if (!sdata->sensor_settings->drdy_irq.addr)
if (!sdata->sensor_settings->drdy_irq.addr) {
/*
* there are some devices (e.g. LIS3MDL) where drdy line is
* routed to a given pin and it is not possible to select a
* different one. Take into account irq status register
* to understand if irq trigger can be properly supported
*/
if (sdata->sensor_settings->drdy_irq.addr_stat_drdy)
sdata->hw_irq_trigger = enable;
return 0;
}
/* Enable/Disable the interrupt generator 1. */
if (sdata->sensor_settings->drdy_irq.ig1.en_addr > 0) {

4
drivers/iio/magnetometer/st_magn_core.c
View File

@ -315,6 +315,10 @@ static const struct st_sensor_settings st_magn_sensors_settings[] = {
},
},
},
.drdy_irq = {
/* drdy line is routed drdy pin */
.addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
},
.multi_read_bit = true,
.bootime = 2,
},