Am 24.08.2017 um 20:46 schrieb Heiner Kallweit:

Hi Enric,

I just saw your submitted patch on patchwork. As I haven't been subscribed
to linux-rtc list yet, I can't reply to the original mail.

Few remarks:
I think the same can be achieved easier (apart from the fact that member
irq was just removed from struct ds1307).
The curent call to device_set_wakeup_capable has to be replaced with
device_init_wakeup, in addition we have to call dev_pm_set_wake_irq to
register the interrupt with the Linux wakeup core. Then the core takes
care of everything.

After further checking not even this may be necessary.
If flag I2C_CLIENT_WAKE is set for the i2c client then i2c_device_probe()
enables the device as wakeup device and registers the interrupt with the
wakeup core.
If the i2c client is defined via DT, then of_i2c_register_device() sets
this flag based on the "wakeup-source" property.
Is your device configured via DT? If yes, did you check whether wakeup
works w/o your patch with just setting property wakeup-source ?

See also rtc-ds1343, although I think the calls to enable/disable_irq_wake
are not needed there because the core takes care of this already
(enable_irq_wake is called from dev_pm_arm_wake_irq).

Rgds, Heiner