Commit 9ef38afd authored by Gwendal Grignou's avatar Gwendal Grignou Committed by Jonathan Cameron
Browse files

iio: cros_ec_accel_legacy: Add Read Only frequency entries 



Report to user space that 10Hz is the sampling frequency of
the accelerometers in legacy mode, and it can not be changed.

Signed-off-by: default avatarGwendal Grignou <gwendal@chromium.org>
Reviewed-by: default avatarEnric Balletbo i Serra <enric.balletbo@collabora.com>
Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 853fa487

drivers/iio/accel/cros_ec_accel_legacy.c

+45 −1
Original line number Diff line number Diff line
@@ -33,6 +33,11 @@ 
 */

#define ACCEL_LEGACY_NSCALE 9586168



/*

 * Sensor frequency is hard-coded to 10Hz.

 */

static const int cros_ec_legacy_sample_freq[] = { 10, 0 };



static int cros_ec_accel_legacy_read_cmd(struct iio_dev *indio_dev,

				  unsigned long scan_mask, s16 *data)

{
@@ -96,6 +101,11 @@ static int cros_ec_accel_legacy_read(struct iio_dev *indio_dev, 
		*val = 0;

		ret = IIO_VAL_INT;

		break;

	case IIO_CHAN_INFO_SAMP_FREQ:

		*val = cros_ec_legacy_sample_freq[0];

		*val2 = cros_ec_legacy_sample_freq[1];

		ret = IIO_VAL_INT_PLUS_MICRO;

		break;

	default:

		ret = cros_ec_sensors_core_read(st, chan, val, val2,

				mask);
@@ -120,9 +130,39 @@ static int cros_ec_accel_legacy_write(struct iio_dev *indio_dev, 
	return -EINVAL;

}



/**

 * cros_ec_accel_legacy_read_avail() - get available values

 * @indio_dev:		pointer to state information for device

 * @chan:	channel specification structure table

 * @vals:	list of available values

 * @type:	type of data returned

 * @length:	number of data returned in the array

 * @mask:	specifies which values to be requested

 *

 * Return:	an error code or IIO_AVAIL_LIST

 */

static int cros_ec_accel_legacy_read_avail(struct iio_dev *indio_dev,

					   struct iio_chan_spec const *chan,

					   const int **vals,

					   int *type,

					   int *length,

					   long mask)

{

	switch (mask) {

	case IIO_CHAN_INFO_SAMP_FREQ:

		*length = ARRAY_SIZE(cros_ec_legacy_sample_freq);

		*vals = cros_ec_legacy_sample_freq;

		*type = IIO_VAL_INT_PLUS_MICRO;

		return IIO_AVAIL_LIST;

	}



	return -EINVAL;

}



static const struct iio_info cros_ec_accel_legacy_info = {

	.read_raw = &cros_ec_accel_legacy_read,

	.write_raw = &cros_ec_accel_legacy_write,

	.read_avail = &cros_ec_accel_legacy_read_avail,

};



/*
@@ -142,7 +182,11 @@ static const struct iio_info cros_ec_accel_legacy_info = { 
		.info_mask_separate =					\

			BIT(IIO_CHAN_INFO_RAW) |			\

			BIT(IIO_CHAN_INFO_CALIBBIAS),			\

		.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SCALE),	\

		.info_mask_shared_by_all =				\

			BIT(IIO_CHAN_INFO_SCALE) |			\

			BIT(IIO_CHAN_INFO_SAMP_FREQ),			\

		.info_mask_shared_by_all_available =			\

			BIT(IIO_CHAN_INFO_SAMP_FREQ),			\

		.ext_info = cros_ec_sensors_ext_info,			\

		.scan_type = {						\

			.sign = 's',					\