Grafting old platform drivers onto a new DT kernel

Måns Rullgård mans at
Mon Nov 9 08:12:16 PST 2015

Mason <slash.tmp at> writes:

> On 09/11/2015 16:40, Måns Rullgård wrote:
>> The simplest solution for you is probably to add a quick and dirty DT
>> binding to the old driver.  If it doesn't use any driver-specific
>> platform data struct, you only need to set .of_match_table in the
>> struct platform_driver.  If there is a platform data struct, you'll also
>> need to write some code to populate it from DT properties.  It shouldn't
>> take more than a few minutes per driver in most cases.
> I'll try that approach, although I fear that "a few minutes per driver"
> is an optimistic assessment.

If the driver only needs an MMIO region and an IRQ, it is literally five
lines of code.

Måns Rullgård
mans at

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