On Tue, Oct 08, 2013 at 05:46:49PM +0800, Wei Ni wrote: > In the regulator_dev_lookup(), it will try to read the "xx-supply" to > get the regnode, but I didn't set the vcc-supply in dts file for lm90, > so the of_get_regulator() will return NULL, then the > regulator_dev_lookup() will set the ret to -ENODEV, and return the rdev > as NULL.
OK, I think the device tree board code just needs to set full constraints during machine initialisation. We can't have multiple initcalls in the regulator code and doing it there is really a bit of a workaround anyway.
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