diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2015-11-19 12:15:17 +0300 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-01-10 15:35:32 +0300 |
| commit | a9fd053b56c6bb14972ab7a19da0b575fe4c5d66 (patch) | |
| tree | 625a014d7de7fd5ad114f8c045e8f2821f99679a /drivers/iio/magnetometer | |
| parent | c4f0ebd91467c701b32879bf6091e5c91c6e79c1 (diff) | |
| download | linux-a9fd053b56c6bb14972ab7a19da0b575fe4c5d66.tar.xz | |
iio: st_sensors: support active-low interrupts
Most ST MEMS Sensors that support interrupts can also handle sending
an active low interrupt, i.e. going from high to low on data ready
(or other interrupt) and thus triggering on a falling edge to the
interrupt controller.
Set up logic to inspect the interrupt line we get for a sensor: if
it is triggering on rising edge, leave everything alone, but if it
triggers on falling edges, set up active low, and if unsupported
configurations appear: warn with errors and reconfigure the interrupt
to a rising edge, which all interrupt generating sensors support.
Create a local header for st_sensors_core.h to share functions
between the sensor core and the trigger setup code.
Cc: Giuseppe Barba <giuseppe.barba@st.com>
Cc: Denis Ciocca <denis.ciocca@st.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio/magnetometer')
| -rw-r--r-- | drivers/iio/magnetometer/st_magn_core.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c index b27f0146647b..501f858df413 100644 --- a/drivers/iio/magnetometer/st_magn_core.c +++ b/drivers/iio/magnetometer/st_magn_core.c @@ -175,6 +175,8 @@ #define ST_MAGN_3_BDU_MASK 0x10 #define ST_MAGN_3_DRDY_IRQ_ADDR 0x62 #define ST_MAGN_3_DRDY_INT_MASK 0x01 +#define ST_MAGN_3_IHL_IRQ_ADDR 0x63 +#define ST_MAGN_3_IHL_IRQ_MASK 0x04 #define ST_MAGN_3_FS_AVL_15000_GAIN 1500 #define ST_MAGN_3_MULTIREAD_BIT false #define ST_MAGN_3_OUT_X_L_ADDR 0x68 @@ -480,6 +482,8 @@ static const struct st_sensor_settings st_magn_sensors_settings[] = { .drdy_irq = { .addr = ST_MAGN_3_DRDY_IRQ_ADDR, .mask_int1 = ST_MAGN_3_DRDY_INT_MASK, + .addr_ihl = ST_MAGN_3_IHL_IRQ_ADDR, + .mask_ihl = ST_MAGN_3_IHL_IRQ_MASK, }, .multi_read_bit = ST_MAGN_3_MULTIREAD_BIT, .bootime = 2, |