> This prepares the interrupt to be used for other stuff than
> fifo reading + event readings.
>
> Signed-off-by: Sean Nyekjaer <sean@xxxxxxxxxx>
> ---
> .../iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c | 78 +---------------
> drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c | 88 +++++++++++++++++++
> 2 files changed, 89 insertions(+), 77 deletions(-)
>
Acked-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> index b0f3da1976e4..ef579650fd52 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_buffer.c
> @@ -30,8 +30,6 @@
> * Denis Ciocca <denis.ciocca@xxxxxx>
> */
> #include <linux/module.h>
> -#include <linux/interrupt.h>
> -#include <linux/irq.h>
> #include <linux/iio/kfifo_buf.h>
> #include <linux/iio/iio.h>
> #include <linux/iio/buffer.h>
> @@ -42,10 +40,6 @@
>
> #include "st_lsm6dsx.h"
>
> -#define ST_LSM6DSX_REG_HLACTIVE_ADDR 0x12
> -#define ST_LSM6DSX_REG_HLACTIVE_MASK BIT(5)
> -#define ST_LSM6DSX_REG_PP_OD_ADDR 0x12
> -#define ST_LSM6DSX_REG_PP_OD_MASK BIT(4)
> #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)
> @@ -654,25 +648,6 @@ int st_lsm6dsx_update_fifo(struct st_lsm6dsx_sensor *sensor, bool enable)
> return err;
> }
>
> -static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private)
> -{
> - struct st_lsm6dsx_hw *hw = private;
> -
> - return hw->sip > 0 ? IRQ_WAKE_THREAD : IRQ_NONE;
> -}
> -
> -static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private)
> -{
> - struct st_lsm6dsx_hw *hw = private;
> - int count;
> -
> - mutex_lock(&hw->fifo_lock);
> - count = hw->settings->fifo_ops.read_fifo(hw);
> - mutex_unlock(&hw->fifo_lock);
> -
> - return count ? IRQ_HANDLED : IRQ_NONE;
> -}
> -
> static int st_lsm6dsx_buffer_preenable(struct iio_dev *iio_dev)
> {
> struct st_lsm6dsx_sensor *sensor = iio_priv(iio_dev);
> @@ -702,59 +677,8 @@ static const struct iio_buffer_setup_ops st_lsm6dsx_buffer_ops = {
>
> int st_lsm6dsx_fifo_setup(struct st_lsm6dsx_hw *hw)
> {
> - struct device_node *np = hw->dev->of_node;
> - struct st_sensors_platform_data *pdata;
> 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));
> -
> - 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 = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_HLACTIVE_ADDR,
> - ST_LSM6DSX_REG_HLACTIVE_MASK,
> - FIELD_PREP(ST_LSM6DSX_REG_HLACTIVE_MASK,
> - irq_active_low));
> - if (err < 0)
> - return err;
> -
> - pdata = (struct st_sensors_platform_data *)hw->dev->platform_data;
> - if ((np && of_property_read_bool(np, "drive-open-drain")) ||
> - (pdata && pdata->open_drain)) {
> - err = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_PP_OD_ADDR,
> - ST_LSM6DSX_REG_PP_OD_MASK,
> - FIELD_PREP(ST_LSM6DSX_REG_PP_OD_MASK,
> - 1));
> - if (err < 0)
> - return err;
> -
> - irq_type |= IRQF_SHARED;
> - }
> -
> - err = devm_request_threaded_irq(hw->dev, hw->irq,
> - st_lsm6dsx_handler_irq,
> - st_lsm6dsx_handler_thread,
> - irq_type | IRQF_ONESHOT,
> - "lsm6dsx", hw);
> - if (err) {
> - dev_err(hw->dev, "failed to request trigger irq %d\n",
> - hw->irq);
> - return err;
> - }
> + int i;
>
> for (i = 0; i < ST_LSM6DSX_ID_MAX; i++) {
> if (!hw->iio_devs[i])
> diff --git a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> index 2d3495560136..d0bcbbfb6297 100644
> --- a/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> +++ b/drivers/iio/imu/st_lsm6dsx/st_lsm6dsx_core.c
> @@ -50,6 +50,8 @@
> #include <linux/delay.h>
> #include <linux/iio/iio.h>
> #include <linux/iio/sysfs.h>
> +#include <linux/interrupt.h>
> +#include <linux/irq.h>
> #include <linux/pm.h>
> #include <linux/regmap.h>
> #include <linux/bitfield.h>
> @@ -65,6 +67,11 @@
> #define ST_LSM6DSX_REG_BDU_ADDR 0x12
> #define ST_LSM6DSX_REG_BDU_MASK BIT(6)
>
> +#define ST_LSM6DSX_REG_HLACTIVE_ADDR 0x12
> +#define ST_LSM6DSX_REG_HLACTIVE_MASK BIT(5)
> +#define ST_LSM6DSX_REG_PP_OD_ADDR 0x12
> +#define ST_LSM6DSX_REG_PP_OD_MASK BIT(4)
> +
> static const struct iio_chan_spec st_lsm6dsx_acc_channels[] = {
> ST_LSM6DSX_CHANNEL(IIO_ACCEL, 0x28, IIO_MOD_X, 0),
> ST_LSM6DSX_CHANNEL(IIO_ACCEL, 0x2a, IIO_MOD_Y, 1),
> @@ -1466,6 +1473,83 @@ static struct iio_dev *st_lsm6dsx_alloc_iiodev(struct st_lsm6dsx_hw *hw,
> return iio_dev;
> }
>
> +static irqreturn_t st_lsm6dsx_handler_irq(int irq, void *private)
> +{
> + struct st_lsm6dsx_hw *hw = private;
> +
> + return hw->sip > 0 ? IRQ_WAKE_THREAD : IRQ_NONE;
> +}
> +
> +static irqreturn_t st_lsm6dsx_handler_thread(int irq, void *private)
> +{
> + struct st_lsm6dsx_hw *hw = private;
> + int count;
> +
> + mutex_lock(&hw->fifo_lock);
> + count = hw->settings->fifo_ops.read_fifo(hw);
> + mutex_unlock(&hw->fifo_lock);
> +
> + return count ? IRQ_HANDLED : IRQ_NONE;
> +}
> +
> +static int st_lsm6dsx_irq_setup(struct st_lsm6dsx_hw *hw)
> +{
> + struct st_sensors_platform_data *pdata;
> + struct device_node *np = hw->dev->of_node;
> + unsigned long irq_type;
> + bool irq_active_low;
> + int err;
> +
> + irq_type = irqd_get_trigger_type(irq_get_irq_data(hw->irq));
> +
> + 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 = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_HLACTIVE_ADDR,
> + ST_LSM6DSX_REG_HLACTIVE_MASK,
> + FIELD_PREP(ST_LSM6DSX_REG_HLACTIVE_MASK,
> + irq_active_low));
> + if (err < 0)
> + return err;
> +
> + pdata = (struct st_sensors_platform_data *)hw->dev->platform_data;
> + if ((np && of_property_read_bool(np, "drive-open-drain")) ||
> + (pdata && pdata->open_drain)) {
> + err = regmap_update_bits(hw->regmap, ST_LSM6DSX_REG_PP_OD_ADDR,
> + ST_LSM6DSX_REG_PP_OD_MASK,
> + FIELD_PREP(ST_LSM6DSX_REG_PP_OD_MASK,
> + 1));
> + if (err < 0)
> + return err;
> +
> + irq_type |= IRQF_SHARED;
> + }
> +
> + err = devm_request_threaded_irq(hw->dev, hw->irq,
> + st_lsm6dsx_handler_irq,
> + st_lsm6dsx_handler_thread,
> + irq_type | IRQF_ONESHOT,
> + "lsm6dsx", hw);
> + if (err) {
> + dev_err(hw->dev, "failed to request trigger irq %d\n",
> + hw->irq);
> + return err;
> + }
> +
> + return 0;
> +}
> +
> int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id,
> struct regmap *regmap)
> {
> @@ -1514,6 +1598,10 @@ int st_lsm6dsx_probe(struct device *dev, int irq, int hw_id,
> }
>
> if (hw->irq > 0) {
> + err = st_lsm6dsx_irq_setup(hw);
> + if (err < 0)
> + return err;
> +
> err = st_lsm6dsx_fifo_setup(hw);
> if (err < 0)
> return err;
> --
> 2.23.0
>
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