diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2015-11-19 10:15:17 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2016-01-10 12:35:32 +0000 |
| commit | a9fd053b56c6bb14972ab7a19da0b575fe4c5d66 (patch) | |
| tree | 625a014d7de7fd5ad114f8c045e8f2821f99679a /drivers/iio/pressure | |
| parent | c4f0ebd91467c701b32879bf6091e5c91c6e79c1 (diff) | |
| download | linux-a9fd053b56c6bb14972ab7a19da0b575fe4c5d66.tar.bz2 | |
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/pressure')
| -rw-r--r-- | drivers/iio/pressure/st_pressure_core.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/iio/pressure/st_pressure_core.c b/drivers/iio/pressure/st_pressure_core.c index b39a2fb0671c..172393ad34af 100644 --- a/drivers/iio/pressure/st_pressure_core.c +++ b/drivers/iio/pressure/st_pressure_core.c @@ -62,6 +62,8 @@ #define ST_PRESS_LPS331AP_DRDY_IRQ_ADDR 0x22 #define ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK 0x04 #define ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK 0x20 +#define ST_PRESS_LPS331AP_IHL_IRQ_ADDR 0x22 +#define ST_PRESS_LPS331AP_IHL_IRQ_MASK 0x80 #define ST_PRESS_LPS331AP_MULTIREAD_BIT true #define ST_PRESS_LPS331AP_TEMP_OFFSET 42500 @@ -100,6 +102,8 @@ #define ST_PRESS_LPS25H_DRDY_IRQ_ADDR 0x23 #define ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK 0x01 #define ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK 0x10 +#define ST_PRESS_LPS25H_IHL_IRQ_ADDR 0x22 +#define ST_PRESS_LPS25H_IHL_IRQ_MASK 0x80 #define ST_PRESS_LPS25H_MULTIREAD_BIT true #define ST_PRESS_LPS25H_TEMP_OFFSET 42500 #define ST_PRESS_LPS25H_OUT_XL_ADDR 0x28 @@ -220,6 +224,8 @@ static const struct st_sensor_settings st_press_sensors_settings[] = { .addr = ST_PRESS_LPS331AP_DRDY_IRQ_ADDR, .mask_int1 = ST_PRESS_LPS331AP_DRDY_IRQ_INT1_MASK, .mask_int2 = ST_PRESS_LPS331AP_DRDY_IRQ_INT2_MASK, + .addr_ihl = ST_PRESS_LPS331AP_IHL_IRQ_ADDR, + .mask_ihl = ST_PRESS_LPS331AP_IHL_IRQ_MASK, }, .multi_read_bit = ST_PRESS_LPS331AP_MULTIREAD_BIT, .bootime = 2, @@ -304,6 +310,8 @@ static const struct st_sensor_settings st_press_sensors_settings[] = { .addr = ST_PRESS_LPS25H_DRDY_IRQ_ADDR, .mask_int1 = ST_PRESS_LPS25H_DRDY_IRQ_INT1_MASK, .mask_int2 = ST_PRESS_LPS25H_DRDY_IRQ_INT2_MASK, + .addr_ihl = ST_PRESS_LPS25H_IHL_IRQ_ADDR, + .mask_ihl = ST_PRESS_LPS25H_IHL_IRQ_MASK, }, .multi_read_bit = ST_PRESS_LPS25H_MULTIREAD_BIT, .bootime = 2, |