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| author |   Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> | 2017-06-07 20:17:10 +0200 |
|---|---|---|
| committer |   Jonathan Cameron <jic23@kernel.org> | 2017-06-11 15:07:36 +0100 |
| commit | 89ca88a7cdf20f4afb841c296f2234b527a5c54a (patch) | |
| tree | f2c7c640ac4e2690bc043323ad6f9a25351b87dd /drivers/iio | |
| parent | iio: adc: ad7791: Use sysfs_match_string() helper (diff) | |
| download | linux-dev-89ca88a7cdf20f4afb841c296f2234b527a5c54a.tar.xz linux-dev-89ca88a7cdf20f4afb841c296f2234b527a5c54a.zip | |
iio: imu: st_lsm6dsx: support active-low interrupts
Add support for active low interrupts (IRQF_TRIGGER_LOW and
IRQF_TRIGGER_FALLING). Configure the device as active high or low
according to the requested irq line.
Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@st.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c index b19a62d8c884..2a72acc6e049 100644 --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c @@ -37,6 +37,8 @@ #define ST_LSM6DSX_REG_FIFO_THH_ADDR 0x07 #define ST_LSM6DSX_FIFO_TH_MASK GENMASK(11, 0) #define ST_LSM6DSX_REG_FIFO_DEC_GXL_ADDR 0x08 +#define ST_LSM6DSX_REG_HLACTIVE_ADDR 0x12 +#define ST_LSM6DSX_REG_HLACTIVE_MASK BIT(5) #define ST_LSM6DSX_REG_FIFO_MODE_ADDR 0x0a #define ST_LSM6DSX_FIFO_MODE_MASK GENMASK(2, 0) #define ST_LSM6DSX_FIFO_ODR_MASK GENMASK(6, 3) @@ -417,6 +419,7 @@ int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw) { struct iio_buffer *buffer; unsigned long irq_type; + bool irq_active_low; int i, err; irq_type = irqd_get_trigger_type(irq_get_irq_data(hw->irq)); @@ -424,12 +427,23 @@ int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw) switch (irq_type) { case IRQF_TRIGGER_HIGH: case IRQF_TRIGGER_RISING: + irq_active_low = false; + break; + case IRQF_TRIGGER_LOW: + case IRQF_TRIGGER_FALLING: + irq_active_low = true; break; default: dev_info(hw->dev, "mode %lx unsupported\n", irq_type); return -EINVAL; } + err = st_lsm6dsx_write_with_mask(hw, ST_LSM6DSX_REG_HLACTIVE_ADDR, + ST_LSM6DSX_REG_HLACTIVE_MASK, + irq_active_low); + if (err < 0) + return err; + err = devm_request_threaded_irq(hw->dev, hw->irq, st_lsm6dsx_handler_irq, st_lsm6dsx_handler_thread, |