Re: [PATCH v4 3/4] regulator: tps65086: Add regulator driver for the TPS65086 PMIC

From: Mark Brown
Date: Mon Nov 23 2015 - 14:00:53 EST

On Mon, Nov 23, 2015 at 11:40:55AM -0600, Andrew F. Davis wrote:

> But which of_node?

> regulator_config->of_node
> regulator_config->dev->of_node

> The second is the only one I see getting used, the first is only
> used when drivers provide their own init_data and automatic init
> data getting fails.

The configuration of_node is there to override the device one if there
were some reason to do it. This should only happen in a situation where
we weren't able to use the core parsing, with modern drivers it
indicates a problematic binding so the code deliberately doesn't handle
it. Anything with a problematic binding will have generated the
init_data in driver code anyway. If we come up with a reason to extend
the interface we can do that but for now there is no need.

> The same issue is present in GPIO (gpiolib.c:612), where the of_node

Line number references are complately unhelpful if you don't say what
you're looking at (for me that's a call to irq_find_mapping() which I'm
guessing isn't what you were talking about).

> in the config takes precedence over the one in config->dev, the
> opposite is true for regulators, this is very confusing and should be
> standardized.

No, they both do the same thing.

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