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    Subject[RFC/RFT 10/10] i2c: rcar: add suspend/resume support
    Date
    Because the adapter will be set up before every transaction anyhow, we
    just need to mark it as adapted to the I2C core.

    Signed-off-by: Hiromitsu Yamasaki <hiromitsu.yamasaki.ym@renesas.com>
    Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
    ---
    drivers/i2c/busses/i2c-rcar.c | 25 +++++++++++++++++++++++++
    1 file changed, 25 insertions(+)

    diff --git a/drivers/i2c/busses/i2c-rcar.c b/drivers/i2c/busses/i2c-rcar.c
    index 254e6219e538..30cff066e0da 100644
    --- a/drivers/i2c/busses/i2c-rcar.c
    +++ b/drivers/i2c/busses/i2c-rcar.c
    @@ -1017,10 +1017,35 @@ static int rcar_i2c_remove(struct platform_device *pdev)
    return 0;
    }

    +#ifdef CONFIG_PM_SLEEP
    +static int rcar_i2c_suspend(struct device *dev)
    +{
    + struct rcar_i2c_priv *priv = dev_get_drvdata(dev);
    +
    + i2c_mark_adapter_suspended(&priv->adap, true);
    + return 0;
    +}
    +
    +static int rcar_i2c_resume(struct device *dev)
    +{
    + struct rcar_i2c_priv *priv = dev_get_drvdata(dev);
    +
    + i2c_mark_adapter_suspended(&priv->adap, false);
    + return 0;
    +}
    +
    +static SIMPLE_DEV_PM_OPS(rcar_i2c_pm_ops, rcar_i2c_suspend, rcar_i2c_resume);
    +
    +#define DEV_PM_OPS (&rcar_i2c_pm_ops)
    +#else
    +#define DEV_PM_OPS NULL
    +#endif /* CONFIG_PM_SLEEP */
    +
    static struct platform_driver rcar_i2c_driver = {
    .driver = {
    .name = "i2c-rcar",
    .of_match_table = rcar_i2c_dt_ids,
    + .pm = DEV_PM_OPS,
    },
    .probe = rcar_i2c_probe,
    .remove = rcar_i2c_remove,
    --
    2.11.0
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