[PATCH] rtc: sun6i: Add NVMEM provider

[Maxime Ripard]

Hi,

On Sun, Apr 18, 2021 at 08:45:49PM -0500, Samuel Holland wrote:
> The sun6i RTC provides 32 bytes of general-purpose data registers.
> They can be used to save data in the always-on RTC power domain.
> The registers are writable via 32-bit MMIO accesses only.
> 
> Expose the region as a NVMEM provider so it can be used by userspace and
> other drivers.
> 
> Signed-off-by: Samuel Holland <samuel at sholland.org>

As far as I understood, you want to use those registers to implement
super-standby? If so, while it makes sense for the kernel to be able to
be able to write to those registers, I guess it would be a bit unwise to
allow the userspace to access it?

Maxime
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