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authorLorenzo Bianconi <lorenzo.bianconi83@gmail.com>2017-08-30 13:50:39 +0200
committerJonathan Cameron <Jonathan.Cameron@huawei.com>2017-10-09 21:01:45 +0100
commite72a060151e5bb673af24993665e270fc4f674a7 (patch)
tree4931e3d26c32eb9f554b91b9a10d4b50d1f24a51 /drivers/iio/pressure
parentc1375d671a352c525d76a8aba306667e0000d98a (diff)
iio: st_sensors: add register mask for status register
Introduce register mask for data-ready status register since pressure sensors (e.g. LPS22HB) export just two channels (BIT(0) and BIT(1)) and BIT(2) is marked reserved while in st_sensors_new_samples_available() value read from status register is masked using 0x7. Moreover do not mask status register using active_scan_mask since now status value is properly masked and if the result is not zero the interrupt has to be consumed by the driver. This fix an issue on LPS25H and LPS331AP where channel definition is swapped respect to status register. Furthermore that change allows to properly support new devices (e.g LIS2DW12) that report just ZYXDA (data-ready) field in status register to figure out if the interrupt has been generated by the device. Fixes: 97865fe41322 (iio: st_sensors: verify interrupt event to status) Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/pressure')
-rw-r--r--drivers/iio/pressure/st_pressure_core.c15
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c
index 86120715913b..5f8358e23f5b 100644
--- a/drivers/iio/pressure/st_pressure_core.c
+++ b/drivers/iio/pressure/st_pressure_core.c
@@ -287,7 +287,10 @@ static const struct st_sensor_settings st_press_sensors_settings[] = {
.mask_ihl = 0x80,
.addr_od = 0x22,
.mask_od = 0x40,
- .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
+ .stat_drdy = {
+ .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+ .mask = 0x03,
+ },
},
.multi_read_bit = true,
.bootime = 2,
@@ -395,7 +398,10 @@ static const struct st_sensor_settings st_press_sensors_settings[] = {
.mask_ihl = 0x80,
.addr_od = 0x22,
.mask_od = 0x40,
- .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
+ .stat_drdy = {
+ .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+ .mask = 0x03,
+ },
},
.multi_read_bit = true,
.bootime = 2,
@@ -456,7 +462,10 @@ static const struct st_sensor_settings st_press_sensors_settings[] = {
.mask_ihl = 0x80,
.addr_od = 0x12,
.mask_od = 0x40,
- .addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
+ .stat_drdy = {
+ .addr = ST_SENSORS_DEFAULT_STAT_ADDR,
+ .mask = 0x03,
+ },
},
.multi_read_bit = false,
.bootime = 2,