[PATCH v4 04/14] mfd: Add Samsung PWM/timer master driver

[Mark Brown]

On Thu, Apr 11, 2013 at 12:35:47AM +0200, Arnd Bergmann wrote:

> Sorry for not replying earlier. My idea for the register level interface
> was to create a platform_device for each PWM, e.g. using the mfd_cell
> infrastructure. You can then pass a "struct regmap" as the platform
> data for each child of the timer node, and all the DT handling code
> can stay in the parent driver.

Dunno if it helps or not but there's also dev_get_regmap() if you're
passing the struct device around or can fish one out of thhe parent.
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