diff options
| author | Lorenzo Bianconi <lorenzo.bianconi83@gmail.com> | 2017-07-17 19:39:01 +0200 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2017-07-22 21:21:46 +0100 |
| commit | e7b4b45e1e1f22585cfc986b1c5c99e124def10e (patch) | |
| tree | 81d5aa17388b09bcfe082647962678864d71dabd /drivers | |
| parent | e3e25446a3d2d1beb2443b65a919e59a060182d5 (diff) | |
| download | linux-e7b4b45e1e1f22585cfc986b1c5c99e124def10e.tar.bz2 | |
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')
| -rw-r--r-- | drivers/iio/humidity/hts221.h | 1 | ||||
| -rw-r--r-- | drivers/iio/humidity/hts221_buffer.c | 11 | ||||
| -rw-r--r-- | drivers/iio/humidity/hts221_core.c | 3 |
3 files changed, 13 insertions, 2 deletions
diff --git a/drivers/iio/humidity/hts221.h b/drivers/iio/humidity/hts221.h index 69dfa5c63ec2..c3de6e494f8c 100644 --- a/drivers/iio/humidity/hts221.h +++ b/drivers/iio/humidity/hts221.h @@ -61,6 +61,7 @@ struct hts221_hw { extern const struct dev_pm_ops hts221_pm_ops; int hts221_config_drdy(struct hts221_hw *hw, bool enable); +int hts221_write_with_mask(struct hts221_hw *hw, u8 addr, u8 mask, u8 val); int hts221_probe(struct iio_dev *iio_dev); int hts221_set_enable(struct hts221_hw *hw, bool enable); int hts221_allocate_buffers(struct hts221_hw *hw); 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, diff --git a/drivers/iio/humidity/hts221_core.c b/drivers/iio/humidity/hts221_core.c index dc55d9fbc702..25fcb9993998 100644 --- a/drivers/iio/humidity/hts221_core.c +++ b/drivers/iio/humidity/hts221_core.c @@ -135,8 +135,7 @@ static const struct iio_chan_spec hts221_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(2), }; -static int hts221_write_with_mask(struct hts221_hw *hw, u8 addr, u8 mask, - u8 val) +int hts221_write_with_mask(struct hts221_hw *hw, u8 addr, u8 mask, u8 val) { u8 data; int err; |