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iio: cros_ec: Register to cros_ec_sensorhub when EC supports FIFO

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When EC supports FIFO, each IIO device registers a callback, to put
samples in the buffer when they arrives from the FIFO.

When no FIFO, the user space app needs to call trigger_new, or better
register a high precision timer.

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 15:34:38 -07:00
committed by Enric Balletbo i Serra
parent 69f0793eb6
commit aa984f1ba4
7 changed files with 119 additions and 29 deletions
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10
include/linux/iio/common/cros_ec_sensors_core.h
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@@ -12,6 +12,7 @@
#include <linux/irqreturn.h>
#include <linux/platform_data/cros_ec_commands.h>
#include <linux/platform_data/cros_ec_proto.h>
#include <linux/platform_data/cros_ec_sensorhub.h>
enum {
CROS_EC_SENSOR_X,
@@ -32,6 +33,8 @@ enum {
/* Minimum sampling period to use when device is suspending */
#define CROS_EC_MIN_SUSPEND_SAMPLING_FREQUENCY 1000 /* 1 second */
typedef irqreturn_t (*cros_ec_sensors_capture_t)(int irq, void *p);
/**
* struct cros_ec_sensors_core_state - state data for EC sensors IIO driver
* @ec: cros EC device structure
@@ -87,9 +90,14 @@ int cros_ec_sensors_read_cmd(struct iio_dev *indio_dev, unsigned long scan_mask,
struct platform_device;
int cros_ec_sensors_core_init(struct platform_device *pdev,
struct iio_dev *indio_dev, bool physical_device);
struct iio_dev *indio_dev, bool physical_device,
cros_ec_sensors_capture_t trigger_capture,
cros_ec_sensorhub_push_data_cb_t push_data);
irqreturn_t cros_ec_sensors_capture(int irq, void *p);
int cros_ec_sensors_push_data(struct iio_dev *indio_dev,
s16 *data,
s64 timestamp);
int cros_ec_motion_send_host_cmd(struct cros_ec_sensors_core_state *st,
u16 opt_length);