> MMC host has a sysfs interface to let user specify the auto suspended delay.
> Each slot of the host controller can have a different delay for runtime
> suspended.


>   out:
> +     /* power off host controller */
> +     pm_runtime_put(&host->class_dev);
If you want to use autosuspend feature, then you need to use the function 
pm_runtime_put_autosuspend().


I'm also worried about this patch not taking in account the 8 clock cycles 
before shutting down the clock, contrary to the clock gating fw.
If you power down hc, you will also gate the clock. So the sdio protocol might 
not be strictly followed.


Regards,
Pierre
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