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    Subject[PATCH v9 4/5] PM / devfreq: exynos-bus: Add registration of interconnect child device
    Date
    This patch adds registration of a child platform device for the exynos
    interconnect driver. It is assumed that the interconnect provider will
    only be needed when #interconnect-cells property is present in the bus
    DT node, hence the child device will be created only when such a property
    is present.

    Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
    Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
    Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
    ---
    Changes for v9:
    - whitespace (indentation) corrections.

    Changes for v8...v6:
    - none.

    Changes for v5:
    - new patch.
    ---
    drivers/devfreq/exynos-bus.c | 17 +++++++++++++++++
    1 file changed, 17 insertions(+)

    diff --git a/drivers/devfreq/exynos-bus.c b/drivers/devfreq/exynos-bus.c
    index 1e684a4..20447a4 100644
    --- a/drivers/devfreq/exynos-bus.c
    +++ b/drivers/devfreq/exynos-bus.c
    @@ -24,6 +24,7 @@

    struct exynos_bus {
    struct device *dev;
    + struct platform_device *icc_pdev;

    struct devfreq *devfreq;
    struct devfreq_event_dev **edev;
    @@ -156,6 +157,8 @@ static void exynos_bus_exit(struct device *dev)
    if (ret < 0)
    dev_warn(dev, "failed to disable the devfreq-event devices\n");

    + platform_device_unregister(bus->icc_pdev);
    +
    dev_pm_opp_of_remove_table(dev);
    clk_disable_unprepare(bus->clk);
    if (bus->opp_table) {
    @@ -168,6 +171,8 @@ static void exynos_bus_passive_exit(struct device *dev)
    {
    struct exynos_bus *bus = dev_get_drvdata(dev);

    + platform_device_unregister(bus->icc_pdev);
    +
    dev_pm_opp_of_remove_table(dev);
    clk_disable_unprepare(bus->clk);
    }
    @@ -432,6 +437,18 @@ static int exynos_bus_probe(struct platform_device *pdev)
    if (ret < 0)
    goto err;

    + /* Create child platform device for the interconnect provider */
    + if (of_get_property(dev->of_node, "#interconnect-cells", NULL)) {
    + bus->icc_pdev = platform_device_register_data(
    + dev, "exynos-generic-icc",
    + PLATFORM_DEVID_AUTO, NULL, 0);
    +
    + if (IS_ERR(bus->icc_pdev)) {
    + ret = PTR_ERR(bus->icc_pdev);
    + goto err;
    + }
    + }
    +
    max_state = bus->devfreq->profile->max_state;
    min_freq = (bus->devfreq->profile->freq_table[0] / 1000);
    max_freq = (bus->devfreq->profile->freq_table[max_state - 1] / 1000);
    --
    2.7.4
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