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| author | Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> | 2017-07-17 19:39:01 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2017-07-22 22:21:46 +0200 |
| commit | e7b4b45e1e1f22585cfc986b1c5c99e124def10e (patch) | |
| tree | 81d5aa17388b09bcfe082647962678864d71dabd /drivers/iio/humidity/hts221_buffer.c | |
| parent | iio: humidity: hts221: squash hts221_power_on/off in hts221_set_enable (diff) | |
| download | linux-e7b4b45e1e1f22585cfc986b1c5c99e124def10e.tar.xz linux-e7b4b45e1e1f22585cfc986b1c5c99e124def10e.zip | |
iio: humidity: hts221: 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 <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/humidity/hts221_buffer.c')
| -rw-r--r-- | drivers/iio/humidity/hts221_buffer.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/drivers/iio/humidity/hts221_buffer.c b/drivers/iio/humidity/hts221_buffer.c index c4ed153ad397..ad5222295b2c 100644 --- a/drivers/iio/humidity/hts221_buffer.c +++ b/drivers/iio/humidity/hts221_buffer.c @@ -22,6 +22,8 @@ #include "hts221.h" +#define HTS221_REG_DRDY_HL_ADDR 0x22 +#define HTS221_REG_DRDY_HL_MASK BIT(7) #define HTS221_REG_STATUS_ADDR 0x27 #define HTS221_RH_DRDY_MASK BIT(1) #define HTS221_TEMP_DRDY_MASK BIT(0) @@ -67,6 +69,7 @@ static irqreturn_t hts221_trigger_handler_thread(int irq, void *private) int hts221_allocate_trigger(struct hts221_hw *hw) { struct iio_dev *iio_dev = iio_priv_to_dev(hw); + bool irq_active_low = false; unsigned long irq_type; int err; @@ -76,6 +79,10 @@ int hts221_allocate_trigger(struct hts221_hw *hw) case IRQF_TRIGGER_HIGH: case IRQF_TRIGGER_RISING: break; + case IRQF_TRIGGER_LOW: + case IRQF_TRIGGER_FALLING: + irq_active_low = true; + break; default: dev_info(hw->dev, "mode %lx unsupported, using IRQF_TRIGGER_RISING\n", @@ -84,6 +91,10 @@ int hts221_allocate_trigger(struct hts221_hw *hw) break; } + err = hts221_write_with_mask(hw, HTS221_REG_DRDY_HL_ADDR, + HTS221_REG_DRDY_HL_MASK, irq_active_low); + if (err < 0) + return err; err = devm_request_threaded_irq(hw->dev, hw->irq, NULL, hts221_trigger_handler_thread, irq_type | IRQF_ONESHOT, |