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SubjectRe: [PATCH v2] mfd: vexpress: Convert custom func API to regmap
On Wed, Apr 30, 2014 at 05:01:26PM +0100, Pawel Moll wrote:
> Components of the Versatile Express platform (configuration
> microcontrollers on motherboard and daughterboards in particular)
> talk to each other over a custom configuration bus. They
> provide miscellaneous functions (from clock generator control
> to energy sensors) which are represented as platform devices
> (and Device Tree nodes). The transactions on the bus can
> be generated by different "bridges" in the system, some
> of which are universal for the whole platform (for the price
> of high transfer latencies), others restricted to a subsystem
> (but much faster).
>
> Until now drivers for such functions were using custom "func"
> API, which is being replaced in this patch by regmap calls.
> This required:
>
> * a rework (and move to drivers/bus directory, as suggested
> by Samuel and Arnd) of the config bus core, which is much
> simpler now and uses device model infrastructure (class)
> to keep track of the bridges; non-DT case (soon to be
> retired anyway) is simply covered by a special device
> registration function
>
> * the new config-bus driver also takes over device population,
> so there is no need for special matching table for
> of_platform_populate nor "simple-bus" hack in the arm64
> model dtsi file (relevant bindings documentation has
> been updated); this allows all the vexpress devices
> fit into normal device model, making it possible
> to remove plenty of early inits and other hacks in
> the near future
>
> * adaptation of the syscfg bridge implementation in the
> sysreg driver, again making it much simpler; there is
> a special case of the "energy" function spanning two
> registers, where they should be both defined in the tree
> now, but backward compatibility is maintained in the code
>
> * modification of the relevant drivers:
>
> * hwmon - just a straight-forward API change
> * power/reset driver - API change
> * regulator - API change plus error handling
> simplification
> * osc clock driver - this one required larger rework
> in order to turn in into a standard platform driver
>
> Signed-off-by: Pawel Moll <pawel.moll@arm.com>
> Acked-by: Mark Brown <broonie@linaro.org>
> Acked-by: Lee Jones <lee.jones@linaro.org>

For hwmon:

Acked-by: Guenter Roeck <linux@roeck-us.net>


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