[PATCH v4 17/17] iio: cros_ec: Use Hertz as unit for sampling frequency

Gwendal Grignou
2019-11-05T22:27:34Z

To be compliant with other sensors, set and get sensor sampling
frequency in Hz, not mHz.

Fixes: ae7b02ad2f32 ("iio: common: cros_ec_sensors: Expose
cros_ec_sensors frequency range via iio sysfs")

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
---
Changes in v4:
- Check patch with --strict option
Alignement
No changes in v3.
No changes in v2.

.../cros_ec_sensors/cros_ec_sensors_core.c | 32 +++++++++++--------
.../linux/iio/common/cros_ec_sensors_core.h | 6 ++--
2 files changed, 22 insertions(+), 16 deletions(-)

diff --git a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
index 4169c6c055d8..f91685119cb0 100644
--- a/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
+++ b/drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
@@ -261,6 +261,7 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
struct cros_ec_dev *ec = sensor_hub->ec;
struct cros_ec_sensor_platform *sensor_platform = dev_get_platdata(dev);
u32 ver_mask;
+ int frequencies[ARRAY_SIZE(state->frequencies) / 2] = { 0 };
int ret, i;

platform_set_drvdata(pdev, indio_dev);
@@ -309,20 +310,22 @@ int cros_ec_sensors_core_init(struct platform_device *pdev,
state->calib[i].scale = MOTION_SENSE_DEFAULT_SCALE;

/* 0 is a correct value used to stop the device */
- state->frequencies[0] = 0;
if (state->msg->version < 3) {
get_default_min_max_freq(state->resp->info.type,
- &state->frequencies[1],
- &state->frequencies[2],
+ &frequencies[1],
+ &frequencies[2],
&state->fifo_max_event_count);
} else {
- state->frequencies[1] =
- state->resp->info_3.min_frequency;
- state->frequencies[2] =
- state->resp->info_3.max_frequency;
+ frequencies[1] = state->resp->info_3.min_frequency;
+ frequencies[2] = state->resp->info_3.max_frequency;
state->fifo_max_event_count =
state->resp->info_3.fifo_max_event_count;
}
+ for (i = 0; i < ARRAY_SIZE(frequencies); i++) {
+ state->frequencies[2 * i] = frequencies[i] / 1000;
+ state->frequencies[2 * i + 1] =
+ (frequencies[i] % 1000) * 1000;
+ }

ret = devm_iio_triggered_buffer_setup(dev, indio_dev, NULL,
trigger_capture, NULL);
@@ -713,7 +716,7 @@ int cros_ec_sensors_core_read(struct cros_ec_sensors_core_state *st,
struct iio_chan_spec const *chan,
int *val, int *val2, long mask)
{
- int ret;
+ int ret, frequency;

switch (mask) {
case IIO_CHAN_INFO_SAMP_FREQ:
@@ -725,8 +728,10 @@ int cros_ec_sensors_core_read(struct cros_ec_sensors_core_state *st,
if (ret)
break;

- *val = st->resp->sensor_odr.ret;
- ret = IIO_VAL_INT;
+ frequency = st->resp->sensor_odr.ret;
+ *val = frequency / 1000;
+ *val2 = (frequency % 1000) * 1000;
+ ret = IIO_VAL_INT_PLUS_MICRO;
break;
default:
ret = -EINVAL;
@@ -761,7 +766,7 @@ int cros_ec_sensors_core_read_avail(struct iio_dev *indio_dev,
case IIO_CHAN_INFO_SAMP_FREQ:
*length = ARRAY_SIZE(state->frequencies);
*vals = (const int *)&state->frequencies;
- *type = IIO_VAL_INT;
+ *type = IIO_VAL_INT_PLUS_MICRO;
return IIO_AVAIL_LIST;
}

@@ -783,12 +788,13 @@ int cros_ec_sensors_core_write(struct cros_ec_sensors_core_state *st,
struct iio_chan_spec const *chan,
int val, int val2, long mask)
{
- int ret;
+ int ret, frequency;

switch (mask) {
case IIO_CHAN_INFO_SAMP_FREQ:
+ frequency = val * 1000 + val2 / 1000;
st->param.cmd = MOTIONSENSE_CMD_SENSOR_ODR;
- st->param.sensor_odr.data = val;
+ st->param.sensor_odr.data = frequency;

/* Always roundup, so caller gets at least what it asks for. */
st->param.sensor_odr.roundup = 1;
diff --git a/include/linux/iio/common/cros_ec_sensors_core.h b/include/linux/iio/common/cros_ec_sensors_core.h
index bc26ae2e3272..7bc961defa87 100644
--- a/include/linux/iio/common/cros_ec_sensors_core.h
+++ b/include/linux/iio/common/cros_ec_sensors_core.h
@@ -51,6 +51,8 @@ typedef irqreturn_t (*cros_ec_sensors_capture_t)(int irq, void *p);
* is always 8-byte aligned.
* @read_ec_sensors_data: function used for accessing sensors values
* @fifo_max_event_count: Size of the EC sensor FIFO
+ * @frequencies: Table of known available frequencies:
+ * 0, Min and Max in mHz
*/
struct cros_ec_sensors_core_state {
struct cros_ec_device *ec;
@@ -74,9 +76,7 @@ struct cros_ec_sensors_core_state {
unsigned long scan_mask, s16 *data);

u32 fifo_max_event_count;
-
- /* Table of known available frequencies : 0, Min and Max in mHz */
- int frequencies[3];
+ int frequencies[6];
};

int cros_ec_sensors_read_lpc(struct iio_dev *indio_dev, unsigned long scan_mask,
--
2.24.0.rc1.363.gb1bccd3e3d-goog