RE: [PATCH 1/3] Bluetooth: btmrvl: use cal-data from device-tree instead of conf file

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Hi Marcel,

> > +#include <linux/of.h>
> > #include <net/bluetooth/bluetooth.h>
> > #include <net/bluetooth/hci_core.h>
> 
> here now it becomes tricky. Does this now depend on CONFIG_OF as well?

No. It doesn't depend on CONFIG_OF.
The of.h takes good care of the two OF functions (of_find_node_by_name and of_property_read_u8_array) used in this patch. If CONFIG_OF is not defined, the 1st function returns NULL and the 2nd function returns -ENOSYS.

> 
> What happens to x86 systems that generally do not use open firmware or device tree. Do they still
> work? 

On x86 systems without OF or device tree, the entire calibration data downloading will be skipped.

> Which kind of devices need the calibration data anyway? All of them? Just the ones without
> EEPROM?

Some ARM versions of Chromebook need the calibration data.
They do have EEPROM but still need a piece of new calibration data in test mode.

> 
> You need to pretty much verbose in your commit message on what is going on. And I get the feeling
> that you have to handle the case where CONFIG_OF is not selected.

When CONFIG_OF is not selected, or the specific property is not present in the device tree, the calibration downloading will not happen.

I can add above messages to the commit log in v2.

Thanks,
Bing

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