iio: cm32181: Change cm32181 ambient light sensor driver

Integration time of cm32181 is guessed about milliseconds.
But cm32181_read_als_it function return IIO_VAL_INT.
So fixed to return IIO_VAL_INT_PLUS_MICRO.
Next, add .write_raw_get_fmt callback function for call iio_str_to_fixpoint.

v2: cm32181_write_als_id function fixed as it was.

Cc: Kevin Tsai <ktsai@capellamicro.com>
Signed-off-by: Beomho Seo <beomho.seo@samsung.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/light/cm32181.c b/drivers/iio/light/cm32181.c
index f17b4e6183c6bae6f36ee8acfaac897f76dfd8d9..47a6dbac2d0ca8b23dcea31158b43d3c3df3d2f0 100644 (file)
--- a/drivers/iio/light/cm32181.c
+++ b/drivers/iio/light/cm32181.c
@@ -103,13 +103,13 @@ static int cm32181_reg_init(struct cm32181_chip *cm32181)
 /**
  *  cm32181_read_als_it() - Get sensor integration time (ms)
  *  @cm32181:  pointer of struct cm32181
- *  @val:      pointer of int to load the als_it value.
+ *  @val2:     pointer of int to load the als_it value.
  *
  *  Report the current integartion time by millisecond.
  *
- *  Return: IIO_VAL_INT for success, otherwise -EINVAL.
+ *  Return: IIO_VAL_INT_PLUS_MICRO for success, otherwise -EINVAL.
  */
-static int cm32181_read_als_it(struct cm32181_chip *cm32181, int *val)
+static int cm32181_read_als_it(struct cm32181_chip *cm32181, int *val2)
 {
        u16 als_it;
        int i;
@@ -119,8 +119,8 @@ static int cm32181_read_als_it(struct cm32181_chip *cm32181, int *val)
        als_it >>= CM32181_CMD_ALS_IT_SHIFT;
        for (i = 0; i < ARRAY_SIZE(als_it_bits); i++) {
                if (als_it == als_it_bits[i]) {
-                       *val = als_it_value[i];
-                       return IIO_VAL_INT;
+                       *val2 = als_it_value[i];
+                       return IIO_VAL_INT_PLUS_MICRO;
                }
        }
 
@@ -221,7 +221,7 @@ static int cm32181_read_raw(struct iio_dev *indio_dev,
                *val = cm32181->calibscale;
                return IIO_VAL_INT;
        case IIO_CHAN_INFO_INT_TIME:
-               ret = cm32181_read_als_it(cm32181, val);
+               ret = cm32181_read_als_it(cm32181, val2);
                return ret;
        }
 
@@ -240,7 +240,7 @@ static int cm32181_write_raw(struct iio_dev *indio_dev,
                cm32181->calibscale = val;
                return val;
        case IIO_CHAN_INFO_INT_TIME:
-               ret = cm32181_write_als_it(cm32181, val);
+               ret = cm32181_write_als_it(cm32181, val2);
                return ret;
        }
 
@@ -264,7 +264,7 @@ static ssize_t cm32181_get_it_available(struct device *dev,
 
        n = ARRAY_SIZE(als_it_value);
        for (i = 0, len = 0; i < n; i++)
-               len += sprintf(buf + len, "%d ", als_it_value[i]);
+               len += sprintf(buf + len, "0.%06u ", als_it_value[i]);
        return len + sprintf(buf + len, "\n");
 }