diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/media/v4l2-common.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h index 0a43f56578bc..9d6c236e8f14 100644 --- a/include/media/v4l2-common.h +++ b/include/media/v4l2-common.h @@ -97,6 +97,7 @@ int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, /* ------------------------------------------------------------------------- */ +struct clk; struct v4l2_device; struct v4l2_subdev; struct v4l2_subdev_ops; @@ -620,6 +621,32 @@ int v4l2_link_freq_to_bitmap(struct device *dev, const u64 *fw_link_freqs, unsigned int num_of_driver_link_freqs, unsigned long *bitmap); +/** + * devm_v4l2_sensor_clk_get - lookup and obtain a reference to a clock producer + * for a camera sensor. + * + * @dev: device for v4l2 sensor clock "consumer" + * @id: clock consumer ID + * + * This function behaves the same way as devm_clk_get() except where there + * is no clock producer like in ACPI-based platforms. + * + * For ACPI-based platforms, the function will read the "clock-frequency" + * ACPI _DSD property and register a fixed-clock with the frequency indicated + * in the property. + * + * This function also handles the special ACPI-based system case where: + * + * * The clock-frequency _DSD property is present. + * * A reference to the clock producer is present, where the clock is provided + * by a camera sensor PMIC driver (e.g. int3472/tps68470.c) + * + * In this case try to set the clock-frequency value to the provided clock. + * + * Returns a pointer to a struct clk on success or an error pointer on failure. + */ +struct clk *devm_v4l2_sensor_clk_get(struct device *dev, const char *id); + static inline u64 v4l2_buffer_get_timestamp(const struct v4l2_buffer *buf) { /* |