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    Subject[PATCH v2 11/12] ASoC: tegra: register dependency parser for firmware nodes
    Date
    So others can find out what dependencies a nvidia,tegra-audio-max98090
    device has, as specified in
    bindings/sound/nvidia,tegra-audio-max98090.txt.

    Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
    ---

    Changes in v2: None

    sound/soc/tegra/tegra_max98090.c | 42 +++++++++++++++++++++++++++++++++++++++-
    1 file changed, 41 insertions(+), 1 deletion(-)

    diff --git a/sound/soc/tegra/tegra_max98090.c b/sound/soc/tegra/tegra_max98090.c
    index 902da36..0f7cbf3 100644
    --- a/sound/soc/tegra/tegra_max98090.c
    +++ b/sound/soc/tegra/tegra_max98090.c
    @@ -316,7 +316,47 @@ static struct platform_driver tegra_max98090_driver = {
    .probe = tegra_max98090_probe,
    .remove = tegra_max98090_remove,
    };
    -module_platform_driver(tegra_max98090_driver);
    +
    +static void add_dependency(struct fwnode_handle *fwnode,
    + const char *property,
    + struct list_head *deps)
    +{
    + struct device_node *np;
    +
    + np = of_parse_phandle(to_of_node(fwnode), property, 0);
    + if (!np)
    + return;
    +
    + fwnode_add_dependency(&np->fwnode, deps);
    +}
    +
    +static void tegra_max98090_get_dependencies(struct fwnode_handle *fwnode,
    + struct list_head *deps)
    +{
    + add_dependency(fwnode, "nvidia,i2s-controller", deps);
    + add_dependency(fwnode, "nvidia,audio-codec", deps);
    +}
    +
    +static int __init tegra_max98090_init(void)
    +{
    + int err;
    +
    + err = platform_driver_register(&tegra_max98090_driver);
    + if (err < 0)
    + return err;
    +
    + fwnode_add_dependency_parser(tegra_max98090_get_dependencies);
    +
    + return 0;
    +}
    +module_init(tegra_max98090_init);
    +
    +static void __exit tegra_max98090_exit(void)
    +{
    + fwnode_remove_dependency_parser(tegra_max98090_get_dependencies);
    + platform_driver_unregister(&tegra_max98090_driver);
    +}
    +module_exit(tegra_max98090_exit);

    MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
    MODULE_DESCRIPTION("Tegra max98090 machine ASoC driver");
    --
    2.4.1


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