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    Subject[PATCH 5.12 157/161] i2c: qcom-geni: Suspend and resume the bus during SYSTEM_SLEEP_PM ops
    Date
    From: Roja Rani Yarubandi <rojay@codeaurora.org>

    commit 57648e860485de39c800a89f849fdd03c2d31d15 upstream.

    Mark bus as suspended during system suspend to block the future
    transfers. Implement geni_i2c_resume_noirq() to resume the bus.

    Fixes: 37692de5d523 ("i2c: i2c-qcom-geni: Add bus driver for the Qualcomm GENI I2C controller")
    Signed-off-by: Roja Rani Yarubandi <rojay@codeaurora.org>
    Reviewed-by: Stephen Boyd <swboyd@chromium.org>
    Signed-off-by: Wolfram Sang <wsa@kernel.org>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
    ---
    drivers/i2c/busses/i2c-qcom-geni.c | 12 +++++++++++-
    1 file changed, 11 insertions(+), 1 deletion(-)

    --- a/drivers/i2c/busses/i2c-qcom-geni.c
    +++ b/drivers/i2c/busses/i2c-qcom-geni.c
    @@ -698,6 +698,8 @@ static int __maybe_unused geni_i2c_suspe
    {
    struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);

    + i2c_mark_adapter_suspended(&gi2c->adap);
    +
    if (!gi2c->suspended) {
    geni_i2c_runtime_suspend(dev);
    pm_runtime_disable(dev);
    @@ -707,8 +709,16 @@ static int __maybe_unused geni_i2c_suspe
    return 0;
    }

    +static int __maybe_unused geni_i2c_resume_noirq(struct device *dev)
    +{
    + struct geni_i2c_dev *gi2c = dev_get_drvdata(dev);
    +
    + i2c_mark_adapter_resumed(&gi2c->adap);
    + return 0;
    +}
    +
    static const struct dev_pm_ops geni_i2c_pm_ops = {
    - SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(geni_i2c_suspend_noirq, NULL)
    + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(geni_i2c_suspend_noirq, geni_i2c_resume_noirq)
    SET_RUNTIME_PM_OPS(geni_i2c_runtime_suspend, geni_i2c_runtime_resume,
    NULL)
    };

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