iio: magnetometer: mmc35240: fix available sampling frequencies

Fix the sampling frequencies according to the datasheet (page 8). The
datasheet specifies the following available frequencies for continuous
mode: 1.5 Hz, 13 Hz, 25 Hz, and 50 Hz.

Also fix comments about the ODR to comply with datasheet.

Signed-off-by: Teodora Baluta <teodora.baluta@intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

diff --git a/drivers/iio/magnetometer/mmc35240.c b/drivers/iio/magnetometer/mmc35240.c
index 7a2ea71..d927397 100644 (file)
--- a/drivers/iio/magnetometer/mmc35240.c
+++ b/drivers/iio/magnetometer/mmc35240.c
@@ -84,10 +84,10 @@
 #define MMC35240_OTP_START_ADDR                0x1B
 
 enum mmc35240_resolution {
-       MMC35240_16_BITS_SLOW = 0, /* 100 Hz */
-       MMC35240_16_BITS_FAST,     /* 200 Hz */
-       MMC35240_14_BITS,          /* 333 Hz */
-       MMC35240_12_BITS,          /* 666 Hz */
+       MMC35240_16_BITS_SLOW = 0, /* 7.92 ms */
+       MMC35240_16_BITS_FAST,     /* 4.08 ms */
+       MMC35240_14_BITS,          /* 2.16 ms */
+       MMC35240_12_BITS,          /* 1.20 ms */
 };
 
 enum mmc35240_axis {
@@ -100,22 +100,22 @@ static const struct {
        int sens[3]; /* sensitivity per X, Y, Z axis */
        int nfo; /* null field output */
 } mmc35240_props_table[] = {
-       /* 16 bits, 100Hz ODR */
+       /* 16 bits, 125Hz ODR */
        {
                {1024, 1024, 1024},
                32768,
        },
-       /* 16 bits, 200Hz ODR */
+       /* 16 bits, 250Hz ODR */
        {
                {1024, 1024, 770},
                32768,
        },
-       /* 14 bits, 333Hz ODR */
+       /* 14 bits, 450Hz ODR */
        {
                {256, 256, 193},
                8192,
        },
-       /* 12 bits, 666Hz ODR */
+       /* 12 bits, 800Hz ODR */
        {
                {64, 64, 48},
                2048,
@@ -133,9 +133,15 @@ struct mmc35240_data {
        int axis_scale[3];
 };
 
-static const int mmc35240_samp_freq[] = {100, 200, 333, 666};
+static const struct {
+       int val;
+       int val2;
+} mmc35240_samp_freq[] = { {1, 500000},
+                          {13, 0},
+                          {25, 0},
+                          {50, 0} };
 
-static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("100 200 333 666");
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("1.5 13 25 50");
 
 #define MMC35240_CHANNEL(_axis) { \
        .type = IIO_MAGN, \
@@ -168,7 +174,8 @@ static int mmc35240_get_samp_freq_index(struct mmc35240_data *data,
        int i;
 
        for (i = 0; i < ARRAY_SIZE(mmc35240_samp_freq); i++)
-               if (mmc35240_samp_freq[i] == val)
+               if (mmc35240_samp_freq[i].val == val &&
+                   mmc35240_samp_freq[i].val2 == val2)
                        return i;
        return -EINVAL;
 }
@@ -378,9 +385,9 @@ static int mmc35240_read_raw(struct iio_dev *indio_dev,
                if (i < 0 || i >= ARRAY_SIZE(mmc35240_samp_freq))
                        return -EINVAL;
 
-               *val = mmc35240_samp_freq[i];
-               *val2 = 0;
-               return IIO_VAL_INT;
+               *val = mmc35240_samp_freq[i].val;
+               *val2 = mmc35240_samp_freq[i].val2;
+               return IIO_VAL_INT_PLUS_MICRO;
        default:
                return -EINVAL;
        }