Commit da1690e6 authored by Jonathan Cameron's avatar Jonathan Cameron
Browse files

iio:temperature:tmp006 put sampling_frequency in info_mask_shared_by_all 



Doing this makes it possible to access this control from within the kernel.

Signed-off-by: default avatarJonathan Cameron <jic23@kernel.org>
Acked-by: default avatarPeter Meerwald <pmeerw@pmeerw.net>
Reviewed-by: default avatarLars-Peter Clausen <lars@metafoo.de>
parent 6a63aa0a

drivers/iio/temperature/tmp006.c

+27 −30
Original line number Diff line number Diff line
@@ -70,12 +70,16 @@ static int tmp006_read_measurement(struct tmp006_data *data, u8 reg) 
	return i2c_smbus_read_word_swapped(data->client, reg);

}



static const int tmp006_freqs[5][2] = { {4, 0}, {2, 0}, {1, 0},

					{0, 500000}, {0, 250000} };



static int tmp006_read_raw(struct iio_dev *indio_dev,

			    struct iio_chan_spec const *channel, int *val,

			    int *val2, long mask)

{

	struct tmp006_data *data = iio_priv(indio_dev);

	s32 ret;

	int cr;



	switch (mask) {

	case IIO_CHAN_INFO_RAW:
@@ -106,6 +110,12 @@ static int tmp006_read_raw(struct iio_dev *indio_dev, 
			break;

		}

		return IIO_VAL_INT_PLUS_MICRO;

	case IIO_CHAN_INFO_SAMP_FREQ:

		cr = (data->config & TMP006_CONFIG_CR_MASK)

			>> TMP006_CONFIG_CR_SHIFT;

		*val = tmp006_freqs[cr][0];

		*val2 = tmp006_freqs[cr][1];

		return IIO_VAL_INT_PLUS_MICRO;

	default:

		break;

	}
@@ -113,48 +123,32 @@ static int tmp006_read_raw(struct iio_dev *indio_dev, 
	return -EINVAL;

}



static const char * const tmp006_freqs[] = { "4", "2", "1", "0.5", "0.25" };



static ssize_t tmp006_show_freq(struct device *dev,

				struct device_attribute *attr, char *buf)

{

	struct tmp006_data *data = iio_priv(dev_to_iio_dev(dev));

	int cr = (data->config & TMP006_CONFIG_CR_MASK)

		>> TMP006_CONFIG_CR_SHIFT;

	return sprintf(buf, "%s\n", tmp006_freqs[cr]);

}



static ssize_t tmp006_store_freq(struct device *dev,

				 struct device_attribute *attr,

				 const char *buf, size_t len)

static int tmp006_write_raw(struct iio_dev *indio_dev,

			    struct iio_chan_spec const *chan,

			    int val,

			    int val2,

			    long mask)

{

	struct iio_dev *indio_dev = dev_to_iio_dev(dev);

	struct tmp006_data *data = iio_priv(indio_dev);

	int i;

	bool found = false;



	for (i = 0; i < ARRAY_SIZE(tmp006_freqs); i++)

		if (sysfs_streq(buf, tmp006_freqs[i])) {

			found = true;

			break;

		}

	if (!found)

		return -EINVAL;



		if ((val == tmp006_freqs[i][0]) &&

		    (val2 == tmp006_freqs[i][1])) {

			data->config &= ~TMP006_CONFIG_CR_MASK;

			data->config |= i << TMP006_CONFIG_CR_SHIFT;



	return i2c_smbus_write_word_swapped(data->client, TMP006_CONFIG,

			return i2c_smbus_write_word_swapped(data->client,

							    TMP006_CONFIG,

							    data->config);

}



static IIO_DEV_ATTR_SAMP_FREQ(S_IRUGO | S_IWUSR,

			tmp006_show_freq, tmp006_store_freq);

		}

	return -EINVAL;

}



static IIO_CONST_ATTR(sampling_frequency_available, "4 2 1 0.5 0.25");



static struct attribute *tmp006_attributes[] = {

	&iio_dev_attr_sampling_frequency.dev_attr.attr,

	&iio_const_attr_sampling_frequency_available.dev_attr.attr,

	NULL

};
@@ -168,16 +162,19 @@ static const struct iio_chan_spec tmp006_channels[] = { 
		.type = IIO_VOLTAGE,

		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |

			BIT(IIO_CHAN_INFO_SCALE),

		.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),

	},

	{

		.type = IIO_TEMP,

		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |

			BIT(IIO_CHAN_INFO_SCALE),

		.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),

	}

};



static const struct iio_info tmp006_info = {

	.read_raw = tmp006_read_raw,

	.write_raw = tmp006_write_raw,

	.attrs = &tmp006_attribute_group,

	.driver_module = THIS_MODULE,

};