i2c: qcom-geni: Suspend and resume the bus during SYSTEM_SLEEP_PM ops

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>

diff --git a/drivers/i2c/busses/i2c-qcom-geni.c b/drivers/i2c/busses/i2c-qcom-geni.c
index d4ca00df6a5efc8716ac691cf210c12c35eda5f8..c73b997899af8835b2856a207ca74454947c0db1 100644 (file)
--- a/drivers/i2c/busses/i2c-qcom-geni.c
+++ b/drivers/i2c/busses/i2c-qcom-geni.c
@@ -685,6 +685,8 @@ static int __maybe_unused geni_i2c_suspend_noirq(struct device *dev)
 {
        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);
@@ -694,8 +696,16 @@ static int __maybe_unused geni_i2c_suspend_noirq(struct device *dev)
        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)
 };