Re: [PATCH V3 1/2] spmi: remove wakeup command before slave probe

From: Josh Cartwright
Date: Wed Feb 18 2015 - 10:45:46 EST

On Mon, Feb 09, 2015 at 03:51:11PM -0700, Gilad Avidov wrote:
> According to spmi spec a slave powers up into startup state and then
> transitions into active state. Thus, the wakeup command is not required
> before calling the slave's probe. The wakeup command is only needed for
> slaves that are in sleep state after receiving the sleep command.
> This is a bug since spmi master controllers, such as spmi-pmic-arb,
> which have no support for wakeup command return an error on that
> command and thus fail before reaching a slave driver probe.

If masters are required by the spec to support all commands as Stephen
mentions, then I'd argue this is not a bug in the core code at all, but
in the spmi-pmic-arb driver. But, unfortunately, having lost access to
the spec, I'll defer.

Regardless, I think this is useful as an optimization, just with dubious


Acked-by: Josh Cartwright <joshc@xxxxxxxxxxxx>

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