[PATCH V3 2/6] hwmon: Add support for RPi voltage sensor

Guenter Roeck [off-list ref] writes:

On Fri, May 25, 2018 at 09:24:35PM +0200, Stefan Wahren wrote:

quoted

Currently there is no easy way to detect undervoltage conditions on a
remote Raspberry Pi. This hwmon driver retrieves the state of the
undervoltage sensor via mailbox interface. The handling based on
Noralf's modifications to the downstream firmware driver. In case of
an undervoltage condition only an entry is written to the kernel log.

CC: "Noralf Tr?nnes" <redacted>
Signed-off-by: Stefan Wahren <redacted>

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

... assuming this will go through some arm tree.

That's fine with me, I can pull this whole set for 4.19.  Thanks!
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