Re: [PATCH v2 0/2] pinctrl: Intel Cherryview/Braswell support

Timur Tabi
2014-11-04T22:39:15Z

On 11/04/2014 04:32 PM, Timur Tabi wrote:
>
> There are lots of situations where you don't know the size of the
> property in advance (e.g. strings), and drivers use of_find_property()
> or of_get_property() to pre-allocate a buffer or to verify that the
> property is correctly formed in the device tree.

To follow-up, I have this problem right now with pinctrl_dt_to_map().
The pinctrl-%d property in the device tree is an array of phandles. The
array can be any size, and pinctrl_dt_to_map() queries the size of the
property to determine how many phandles there are. It iterates over all
of them. How do I support that with device_property_read_u32_array()?
That function expects to be told how many phandles there are, and it
doesn't even tell me if there are more or fewer than the number I've given.

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