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Commit e7b4b45e authored by Lorenzo Bianconi's avatar Lorenzo Bianconi Committed by Jonathan Cameron
Browse files

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: default avatarLorenzo Bianconi <lorenzo.bianconi@st.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent e3e25446

drivers/iio/humidity/hts221.h

+1 −0
Original line number Diff line number Diff line
@@ -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);

drivers/iio/humidity/hts221_buffer.c

+11 −0
Original line number Diff line number Diff line
@@ -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,

drivers/iio/humidity/hts221_core.c

+1 −2
Original line number Diff line number Diff line
@@ -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;