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    Subject[PATCH 13/20] mfd/tc3589x: add suspend/resume support
    Date
    Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
    ---
    drivers/mfd/tc3589x.c | 42 ++++++++++++++++++++++++++++++++++++++++++
    1 files changed, 42 insertions(+), 0 deletions(-)

    diff --git a/drivers/mfd/tc3589x.c b/drivers/mfd/tc3589x.c
    index fd206fd..a7dd2b6 100644
    --- a/drivers/mfd/tc3589x.c
    +++ b/drivers/mfd/tc3589x.c
    @@ -14,6 +14,9 @@
    #include <linux/mfd/core.h>
    #include <linux/mfd/tc3589x.h>

    +#define TC3589x_CLKMODE_MODCTL_SLEEP 0x0
    +#define TC3589x_CLKMODE_MODCTL_OPERATION (1 << 0)
    +
    /**
    * tc3589x_reg_read() - read a single TC3589x register
    * @tc3589x: Device to read from
    @@ -365,6 +368,42 @@ static int __devexit tc3589x_remove(struct i2c_client *client)
    return 0;
    }

    +#ifdef CONFIG_PM
    +static int tc3589x_suspend(struct device *dev)
    +{
    + struct tc3589x *tc35892 = dev_get_drvdata(dev);
    + struct i2c_client *client = tc3589x->i2c;
    + int ret = 0;
    +
    + /* put the system to sleep mode */
    + if (!device_may_wakeup(&client->dev))
    + ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE,
    + TC3589x_CLKMODE_MODCTL_SLEEP);
    +
    + return ret;
    +}
    +
    +static int tc3589x_resume(struct device *dev)
    +{
    + struct tc3589x *tc3589x = dev_get_drvdata(dev);
    + struct i2c_client *client = tc3589x->i2c;
    + int ret = 0;
    +
    + /* enable the system into operation */
    + if (!device_may_wakeup(&client->dev))
    + ret = tc3589x_reg_write(tc3589x, TC3589x_CLKMODE,
    + TC3589x_CLKMODE_MODCTL_OPERATION);
    +
    + return ret;
    +}
    +
    +
    +static const struct dev_pm_ops tc3589x_dev_pm_ops = {
    + .suspend = tc3589x_suspend,
    + .resume = tc3589x_resume,
    +};
    +#endif
    +
    static const struct i2c_device_id tc3589x_id[] = {
    { "tc3589x", 24 },
    { }
    @@ -374,6 +413,9 @@ MODULE_DEVICE_TABLE(i2c, tc3589x_id);
    static struct i2c_driver tc3589x_driver = {
    .driver.name = "tc3589x",
    .driver.owner = THIS_MODULE,
    +#ifdef CONFIG_PM
    + .driver.pm = &tc3589x_dev_pm_ops,
    +#endif
    .probe = tc3589x_probe,
    .remove = __devexit_p(tc3589x_remove),
    .id_table = tc3589x_id,
    --
    1.7.2.dirty


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