staging: iio: tsl2x7x: refactor {read,write}_event_value to allow handling multiple...

tsl2x7x_read_thresh() and tsl2x7x_write_thresh() currently assumes
that IIO_EV_INFO_VALUE is the only iio_event_info that will be
passed in.  This patch refactors these two functions so that
additional iio_event_infos can be passed in. The functions are
renamed from tsl2x7x_{read,write}_thresh() to
tsl2x7x_{read,write}_event_value(). This patch also adds the
missing return value check to tsl2x7x_invoke_change() since this
was previously missing. This patch is in preparation for moving
the in_intensity0_thresh_period and in_proximity0_thresh_period sysfs
attributes to be created by iio_event_spec.

Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/staging/iio/light/tsl2x7x.c b/drivers/staging/iio/light/tsl2x7x.c
index 5734628..d80f5dc 100644 (file)
--- a/drivers/staging/iio/light/tsl2x7x.c
+++ b/drivers/staging/iio/light/tsl2x7x.c
@@ -1218,78 +1218,101 @@ static int tsl2x7x_write_interrupt_config(struct iio_dev *indio_dev,
        return 0;
 }
 
-static int tsl2x7x_write_thresh(struct iio_dev *indio_dev,
-                               const struct iio_chan_spec *chan,
-                               enum iio_event_type type,
-                               enum iio_event_direction dir,
-                               enum iio_event_info info,
-                               int val, int val2)
+static int tsl2x7x_write_event_value(struct iio_dev *indio_dev,
+                                    const struct iio_chan_spec *chan,
+                                    enum iio_event_type type,
+                                    enum iio_event_direction dir,
+                                    enum iio_event_info info,
+                                    int val, int val2)
 {
        struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+       int ret = -EINVAL;
 
-       if (chan->type == IIO_INTENSITY) {
-               switch (dir) {
-               case IIO_EV_DIR_RISING:
-                       chip->tsl2x7x_settings.als_thresh_high = val;
-                       break;
-               case IIO_EV_DIR_FALLING:
-                       chip->tsl2x7x_settings.als_thresh_low = val;
-                       break;
-               default:
-                       return -EINVAL;
-               }
-       } else {
-               switch (dir) {
-               case IIO_EV_DIR_RISING:
-                       chip->tsl2x7x_settings.prox_thres_high = val;
-                       break;
-               case IIO_EV_DIR_FALLING:
-                       chip->tsl2x7x_settings.prox_thres_low = val;
-                       break;
-               default:
-                       return -EINVAL;
+       switch (info) {
+       case IIO_EV_INFO_VALUE:
+               if (chan->type == IIO_INTENSITY) {
+                       switch (dir) {
+                       case IIO_EV_DIR_RISING:
+                               chip->tsl2x7x_settings.als_thresh_high = val;
+                               ret = 0;
+                               break;
+                       case IIO_EV_DIR_FALLING:
+                               chip->tsl2x7x_settings.als_thresh_low = val;
+                               ret = 0;
+                               break;
+                       default:
+                               break;
+                       }
+               } else {
+                       switch (dir) {
+                       case IIO_EV_DIR_RISING:
+                               chip->tsl2x7x_settings.prox_thres_high = val;
+                               ret = 0;
+                               break;
+                       case IIO_EV_DIR_FALLING:
+                               chip->tsl2x7x_settings.prox_thres_low = val;
+                               ret = 0;
+                               break;
+                       default:
+                               break;
+                       }
                }
+               break;
+       default:
+               break;
        }
 
-       tsl2x7x_invoke_change(indio_dev);
+       if (ret < 0)
+               return ret;
 
-       return 0;
+       return tsl2x7x_invoke_change(indio_dev);
 }
 
-static int tsl2x7x_read_thresh(struct iio_dev *indio_dev,
-                              const struct iio_chan_spec *chan,
-                              enum iio_event_type type,
-                              enum iio_event_direction dir,
-                                  enum iio_event_info info,
-                              int *val, int *val2)
+static int tsl2x7x_read_event_value(struct iio_dev *indio_dev,
+                                   const struct iio_chan_spec *chan,
+                                   enum iio_event_type type,
+                                   enum iio_event_direction dir,
+                                   enum iio_event_info info,
+                                   int *val, int *val2)
 {
        struct tsl2X7X_chip *chip = iio_priv(indio_dev);
+       int ret = -EINVAL;
 
-       if (chan->type == IIO_INTENSITY) {
-               switch (dir) {
-               case IIO_EV_DIR_RISING:
-                       *val = chip->tsl2x7x_settings.als_thresh_high;
-                       break;
-               case IIO_EV_DIR_FALLING:
-                       *val = chip->tsl2x7x_settings.als_thresh_low;
-                       break;
-               default:
-                       return -EINVAL;
-               }
-       } else {
-               switch (dir) {
-               case IIO_EV_DIR_RISING:
-                       *val = chip->tsl2x7x_settings.prox_thres_high;
-                       break;
-               case IIO_EV_DIR_FALLING:
-                       *val = chip->tsl2x7x_settings.prox_thres_low;
-                       break;
-               default:
-                       return -EINVAL;
+       switch (info) {
+       case IIO_EV_INFO_VALUE:
+               if (chan->type == IIO_INTENSITY) {
+                       switch (dir) {
+                       case IIO_EV_DIR_RISING:
+                               *val = chip->tsl2x7x_settings.als_thresh_high;
+                               ret = IIO_VAL_INT;
+                               break;
+                       case IIO_EV_DIR_FALLING:
+                               *val = chip->tsl2x7x_settings.als_thresh_low;
+                               ret = IIO_VAL_INT;
+                               break;
+                       default:
+                               break;
+                       }
+               } else {
+                       switch (dir) {
+                       case IIO_EV_DIR_RISING:
+                               *val = chip->tsl2x7x_settings.prox_thres_high;
+                               ret = IIO_VAL_INT;
+                               break;
+                       case IIO_EV_DIR_FALLING:
+                               *val = chip->tsl2x7x_settings.prox_thres_low;
+                               ret = IIO_VAL_INT;
+                               break;
+                       default:
+                               break;
+                       }
                }
+               break;
+       default:
+               break;
        }
 
-       return IIO_VAL_INT;
+       return ret;
 }
 
 static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
@@ -1614,8 +1637,8 @@ static const struct iio_info tsl2X7X_device_info[] = {
                .driver_module = THIS_MODULE,
                .read_raw = &tsl2x7x_read_raw,
                .write_raw = &tsl2x7x_write_raw,
-               .read_event_value = &tsl2x7x_read_thresh,
-               .write_event_value = &tsl2x7x_write_thresh,
+               .read_event_value = &tsl2x7x_read_event_value,
+               .write_event_value = &tsl2x7x_write_event_value,
                .read_event_config = &tsl2x7x_read_interrupt_config,
                .write_event_config = &tsl2x7x_write_interrupt_config,
        },
@@ -1625,8 +1648,8 @@ static const struct iio_info tsl2X7X_device_info[] = {
                .driver_module = THIS_MODULE,
                .read_raw = &tsl2x7x_read_raw,
                .write_raw = &tsl2x7x_write_raw,
-               .read_event_value = &tsl2x7x_read_thresh,
-               .write_event_value = &tsl2x7x_write_thresh,
+               .read_event_value = &tsl2x7x_read_event_value,
+               .write_event_value = &tsl2x7x_write_event_value,
                .read_event_config = &tsl2x7x_read_interrupt_config,
                .write_event_config = &tsl2x7x_write_interrupt_config,
        },
@@ -1636,8 +1659,8 @@ static const struct iio_info tsl2X7X_device_info[] = {
                .driver_module = THIS_MODULE,
                .read_raw = &tsl2x7x_read_raw,
                .write_raw = &tsl2x7x_write_raw,
-               .read_event_value = &tsl2x7x_read_thresh,
-               .write_event_value = &tsl2x7x_write_thresh,
+               .read_event_value = &tsl2x7x_read_event_value,
+               .write_event_value = &tsl2x7x_write_event_value,
                .read_event_config = &tsl2x7x_read_interrupt_config,
                .write_event_config = &tsl2x7x_write_interrupt_config,
        },
@@ -1647,8 +1670,8 @@ static const struct iio_info tsl2X7X_device_info[] = {
                .driver_module = THIS_MODULE,
                .read_raw = &tsl2x7x_read_raw,
                .write_raw = &tsl2x7x_write_raw,
-               .read_event_value = &tsl2x7x_read_thresh,
-               .write_event_value = &tsl2x7x_write_thresh,
+               .read_event_value = &tsl2x7x_read_event_value,
+               .write_event_value = &tsl2x7x_write_event_value,
                .read_event_config = &tsl2x7x_read_interrupt_config,
                .write_event_config = &tsl2x7x_write_interrupt_config,
        },
@@ -1658,8 +1681,8 @@ static const struct iio_info tsl2X7X_device_info[] = {
                .driver_module = THIS_MODULE,
                .read_raw = &tsl2x7x_read_raw,
                .write_raw = &tsl2x7x_write_raw,
-               .read_event_value = &tsl2x7x_read_thresh,
-               .write_event_value = &tsl2x7x_write_thresh,
+               .read_event_value = &tsl2x7x_read_event_value,
+               .write_event_value = &tsl2x7x_write_event_value,
                .read_event_config = &tsl2x7x_read_interrupt_config,
                .write_event_config = &tsl2x7x_write_interrupt_config,
        },