Hi,
On Thu, Oct 26, 2017 at 06:03:27PM +0300, Sakari Ailus wrote:
> Add v4l2_fwnode_parse_reference_sensor_common for parsing common
> sensor properties that refer to adjacent devices such as flash or lens
> driver chips.
>
> As this is an association only, there's little a regular driver needs to
> know about these devices as such.
>
> Signed-off-by: Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>
> Acked-by: Hans Verkuil <hans.verkuil@xxxxxxxxx>
> Acked-by: Pavel Machek <pavel@xxxxxx>
Reviewd-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxxxx>
-- Sebastian
> ---
> since v16:
>
> - use const char * const *props for string arrays with property names.
>
> drivers/media/v4l2-core/v4l2-fwnode.c | 35 +++++++++++++++++++++++++++++++++++
> include/media/v4l2-async.h | 3 ++-
> include/media/v4l2-fwnode.h | 21 +++++++++++++++++++++
> 3 files changed, 58 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c
> index f8cd88f791c4..39387dc6cadd 100644
> --- a/drivers/media/v4l2-core/v4l2-fwnode.c
> +++ b/drivers/media/v4l2-core/v4l2-fwnode.c
> @@ -865,6 +865,41 @@ static int v4l2_fwnode_reference_parse_int_props(
> return ret;
> }
>
> +int v4l2_async_notifier_parse_fwnode_sensor_common(
> + struct device *dev, struct v4l2_async_notifier *notifier)
> +{
> + static const char * const led_props[] = { "led" };
> + static const struct {
> + const char *name;
> + const char * const *props;
> + unsigned int nprops;
> + } props[] = {
> + { "flash-leds", led_props, ARRAY_SIZE(led_props) },
> + { "lens-focus", NULL, 0 },
> + };
> + unsigned int i;
> +
> + for (i = 0; i < ARRAY_SIZE(props); i++) {
> + int ret;
> +
> + if (props[i].props && is_acpi_node(dev_fwnode(dev)))
> + ret = v4l2_fwnode_reference_parse_int_props(
> + dev, notifier, props[i].name,
> + props[i].props, props[i].nprops);
> + else
> + ret = v4l2_fwnode_reference_parse(
> + dev, notifier, props[i].name);
> + if (ret && ret != -ENOENT) {
> + dev_warn(dev, "parsing property \"%s\" failed (%d)\n",
> + props[i].name, ret);
> + return ret;
> + }
> + }
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(v4l2_async_notifier_parse_fwnode_sensor_common);
> +
> MODULE_LICENSE("GPL");
> MODULE_AUTHOR("Sakari Ailus <sakari.ailus@xxxxxxxxxxxxxxx>");
> MODULE_AUTHOR("Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>");
> diff --git a/include/media/v4l2-async.h b/include/media/v4l2-async.h
> index 17c4ac7c73e8..8d8cfc3f3100 100644
> --- a/include/media/v4l2-async.h
> +++ b/include/media/v4l2-async.h
> @@ -156,7 +156,8 @@ void v4l2_async_notifier_unregister(struct v4l2_async_notifier *notifier);
> * Release memory resources related to a notifier, including the async
> * sub-devices allocated for the purposes of the notifier but not the notifier
> * itself. The user is responsible for calling this function to clean up the
> - * notifier after calling @v4l2_async_notifier_parse_fwnode_endpoints.
> + * notifier after calling @v4l2_async_notifier_parse_fwnode_endpoints or
> + * @v4l2_fwnode_reference_parse_sensor_common.
> *
> * There is no harm from calling v4l2_async_notifier_cleanup in other
> * cases as long as its memory has been zeroed after it has been
> diff --git a/include/media/v4l2-fwnode.h b/include/media/v4l2-fwnode.h
> index 105cfeee44ef..ca50108dfd8f 100644
> --- a/include/media/v4l2-fwnode.h
> +++ b/include/media/v4l2-fwnode.h
> @@ -319,4 +319,25 @@ int v4l2_async_notifier_parse_fwnode_endpoints_by_port(
> struct v4l2_fwnode_endpoint *vep,
> struct v4l2_async_subdev *asd));
>
> +/**
> + * v4l2_fwnode_reference_parse_sensor_common - parse common references on
> + * sensors for async sub-devices
> + * @dev: the device node the properties of which are parsed for references
> + * @notifier: the async notifier where the async subdevs will be added
> + *
> + * Parse common sensor properties for remote devices related to the
> + * sensor and set up async sub-devices for them.
> + *
> + * Any notifier populated using this function must be released with a call to
> + * v4l2_async_notifier_release() after it has been unregistered and the async
> + * sub-devices are no longer in use, even in the case the function returned an
> + * error.
> + *
> + * Return: 0 on success
> + * -ENOMEM if memory allocation failed
> + * -EINVAL if property parsing failed
> + */
> +int v4l2_async_notifier_parse_fwnode_sensor_common(
> + struct device *dev, struct v4l2_async_notifier *notifier);
> +
> #endif /* _V4L2_FWNODE_H */
> --
> 2.11.0
>
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