[U-Boot] [PATCH] clk: convert API to match reset/mailbox style

[Stephen Warren <swarren@wwwdotorg.org>]

On 05/23/2016 11:47 AM, Stephen Warren wrote:
> From: Stephen Warren <swarren@nvidia.com>
>
> The following changes are made to the clock API:
> * The concept of "clocks" and "peripheral clocks" are unified; each clock
>    provider now implements a single set of clocks. This provides a simpler
>    conceptual interface to clients, and better aligns with device tree
>    clock bindings.
> * Clocks are now identified with a single "struct clk", rather than
>    requiring clients to store the clock provider device and clock identity
>    values separately. For simple clock consumers, this isolates clients
>    from internal details of the clock API.
> * clk.h is split into clk_client.h and clk_uclass.h to make it obvious
>    which parts are relevant to consumers and providers. This aligns with
>    the recently added reset and mailbox APIs.
> * clk_ops .of_xlate(), .request(), and .free() are added so providers
>    can customize these operations if needed. This also aligns with the
>    recently added reset and mailbox APIs.
> * clk_disable() is added.
> * All users of the current clock APIs are updated.
> * Sandbox clock tests are updated to exercise clock lookup via DT, and
>    clock enable/disable.
> * rkclk_get_clk() is removed and replaced with standard APIs.
>
> Buildman shows no clock-related errors for any board for which buildman
> can download a toolchain.
>
> test/py passes for sandbox (which invokes the dm clk test amongst
> others).

Simon, does this look good?

(Note I'll be away on vacation Jun 4-15 so won't be able to respond for 
a while)