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iio: cros_ec: Expose hwfifo_timeout

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Expose EC minimal interrupt period through buffer/hwfifo_timeout:
- Maximal timeout is limited to 65s.
- When timeout for all sensors is set to 0, EC will not send events,
  even if the sensor sampling rate is greater than 0.

Rename frequency to sampling_frequency to match IIO ABI.

Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
This commit is contained in:
Gwendal Grignou 2020-03-27 15:34:40 -07:00 committed by Enric Balletbo i Serra
parent 2861be4ca9
commit 6562793b55
5 changed files with 82 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/iio/common/cros_ec_sensors/cros_ec_sensors.c
View File

@ -236,6 +236,8 @@ static int cros_ec_sensors_probe(struct platform_device *pdev)
if (ret)
return ret;
iio_buffer_set_attrs(indio_dev->buffer, cros_ec_sensor_fifo_attributes);
indio_dev->info = &ec_sensors_info;
state = iio_priv(indio_dev);
for (channel = state->channels, i = CROS_EC_SENSOR_X;
@ -247,7 +249,6 @@ static int cros_ec_sensors_probe(struct platform_device *pdev)
BIT(IIO_CHAN_INFO_CALIBSCALE);
channel->info_mask_shared_by_all =
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_FREQUENCY) |
BIT(IIO_CHAN_INFO_SAMP_FREQ);
channel->info_mask_shared_by_all_available =
BIT(IIO_CHAN_INFO_SAMP_FREQ);

95
drivers/iio/common/cros_ec_sensors/cros_ec_sensors_core.c
View File

@ -11,6 +11,7 @@
#include <linux/iio/common/cros_ec_sensors_core.h>
#include <linux/iio/iio.h>
#include <linux/iio/kfifo_buf.h>
#include <linux/iio/sysfs.h>
#include <linux/iio/trigger_consumer.h>
#include <linux/iio/triggered_buffer.h>
#include <linux/kernel.h>
@ -83,6 +84,77 @@ static void get_default_min_max_freq(enum motionsensor_type type,
}
}
static int cros_ec_sensor_set_ec_rate(struct cros_ec_sensors_core_state *st,
int rate)
{
int ret;
if (rate > U16_MAX)
rate = U16_MAX;
mutex_lock(&st->cmd_lock);
st->param.cmd = MOTIONSENSE_CMD_EC_RATE;
st->param.ec_rate.data = rate;
ret = cros_ec_motion_send_host_cmd(st, 0);
mutex_unlock(&st->cmd_lock);
return ret;
}
static ssize_t cros_ec_sensor_set_report_latency(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
int integer, fract, ret;
int latency;
ret = iio_str_to_fixpoint(buf, 100000, &integer, &fract);
if (ret)
return ret;
/* EC rate is in ms. */
latency = integer * 1000 + fract / 1000;
ret = cros_ec_sensor_set_ec_rate(st, latency);
if (ret < 0)
return ret;
return len;
}
static ssize_t cros_ec_sensor_get_report_latency(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct cros_ec_sensors_core_state *st = iio_priv(indio_dev);
int latency, ret;
mutex_lock(&st->cmd_lock);
st->param.cmd = MOTIONSENSE_CMD_EC_RATE;
st->param.ec_rate.data = EC_MOTION_SENSE_NO_VALUE;
ret = cros_ec_motion_send_host_cmd(st, 0);
latency = st->resp->ec_rate.ret;
mutex_unlock(&st->cmd_lock);
if (ret < 0)
return ret;
return sprintf(buf, "%d.%06u\n",
latency / 1000,
(latency % 1000) * 1000);
}
static IIO_DEVICE_ATTR(hwfifo_timeout, 0644,
cros_ec_sensor_get_report_latency,
cros_ec_sensor_set_report_latency, 0);
const struct attribute *cros_ec_sensor_fifo_attributes[] = {
&iio_dev_attr_hwfifo_timeout.dev_attr.attr,
NULL,
};
EXPORT_SYMBOL_GPL(cros_ec_sensor_fifo_attributes);
int cros_ec_sensors_push_data(struct iio_dev *indio_dev,
s16 *data,
s64 timestamp)
@ -631,18 +703,6 @@ int cros_ec_sensors_core_read(struct cros_ec_sensors_core_state *st,
switch (mask) {
case IIO_CHAN_INFO_SAMP_FREQ:
st->param.cmd = MOTIONSENSE_CMD_EC_RATE;
st->param.ec_rate.data =
EC_MOTION_SENSE_NO_VALUE;
ret = cros_ec_motion_send_host_cmd(st, 0);
if (ret)
break;
*val = st->resp->ec_rate.ret;
ret = IIO_VAL_INT;
break;
case IIO_CHAN_INFO_FREQUENCY:
st->param.cmd = MOTIONSENSE_CMD_SENSOR_ODR;
st->param.sensor_odr.data =
EC_MOTION_SENSE_NO_VALUE;
@ -712,7 +772,7 @@ int cros_ec_sensors_core_write(struct cros_ec_sensors_core_state *st,
int ret;
switch (mask) {
case IIO_CHAN_INFO_FREQUENCY:
case IIO_CHAN_INFO_SAMP_FREQ:
st->param.cmd = MOTIONSENSE_CMD_SENSOR_ODR;
st->param.sensor_odr.data = val;
@ -721,15 +781,6 @@ int cros_ec_sensors_core_write(struct cros_ec_sensors_core_state *st,
ret = cros_ec_motion_send_host_cmd(st, 0);
break;
case IIO_CHAN_INFO_SAMP_FREQ:
st->param.cmd = MOTIONSENSE_CMD_EC_RATE;
st->param.ec_rate.data = val;
ret = cros_ec_motion_send_host_cmd(st, 0);
if (ret)
break;
st->curr_sampl_freq = val;
break;
default:
ret = -EINVAL;
break;

5
drivers/iio/light/cros_ec_light_prox.c
View File

@ -183,6 +183,8 @@ static int cros_ec_light_prox_probe(struct platform_device *pdev)
if (ret)
return ret;
iio_buffer_set_attrs(indio_dev->buffer, cros_ec_sensor_fifo_attributes);
indio_dev->info = &cros_ec_light_prox_info;
state = iio_priv(indio_dev);
state->core.type = state->core.resp->info.type;
@ -191,8 +193,7 @@ static int cros_ec_light_prox_probe(struct platform_device *pdev)
/* Common part */
channel->info_mask_shared_by_all =
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_FREQUENCY);
BIT(IIO_CHAN_INFO_SAMP_FREQ);
channel->info_mask_shared_by_all_available =
BIT(IIO_CHAN_INFO_SAMP_FREQ);
channel->scan_type.realbits = CROS_EC_SENSOR_BITS;

5
drivers/iio/pressure/cros_ec_baro.c
View File

@ -140,6 +140,8 @@ static int cros_ec_baro_probe(struct platform_device *pdev)
if (ret)
return ret;
iio_buffer_set_attrs(indio_dev->buffer, cros_ec_sensor_fifo_attributes);
indio_dev->info = &cros_ec_baro_info;
state = iio_priv(indio_dev);
state->core.type = state->core.resp->info.type;
@ -149,8 +151,7 @@ static int cros_ec_baro_probe(struct platform_device *pdev)
channel->info_mask_separate = BIT(IIO_CHAN_INFO_RAW);
channel->info_mask_shared_by_all =
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_SAMP_FREQ) |
BIT(IIO_CHAN_INFO_FREQUENCY);
BIT(IIO_CHAN_INFO_SAMP_FREQ);
channel->info_mask_shared_by_all_available =
BIT(IIO_CHAN_INFO_SAMP_FREQ);
channel->scan_type.realbits = CROS_EC_SENSOR_BITS;

4
include/linux/iio/common/cros_ec_sensors_core.h
View File

@ -50,7 +50,6 @@ typedef irqreturn_t (*cros_ec_sensors_capture_t)(int irq, void *p);
* the timestamp. The timestamp is always last and
* is always 8-byte aligned.
* @read_ec_sensors_data: function used for accessing sensors values
* @cuur_sampl_freq: current sampling period
*/
struct cros_ec_sensors_core_state {
struct cros_ec_device *ec;
@ -73,8 +72,6 @@ struct cros_ec_sensors_core_state {
int (*read_ec_sensors_data)(struct iio_dev *indio_dev,
unsigned long scan_mask, s16 *data);
int curr_sampl_freq;
/* Table of known available frequencies : 0, Min and Max in mHz */
int frequencies[3];
};
@ -116,5 +113,6 @@ int cros_ec_sensors_core_write(struct cros_ec_sensors_core_state *st,
/* List of extended channel specification for all sensors */
extern const struct iio_chan_spec_ext_info cros_ec_sensors_ext_info[];
extern const struct attribute *cros_ec_sensor_fifo_attributes[];
#endif /* __CROS_EC_SENSORS_CORE_H */