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authorStefan Wahren <stefan.wahren@i2se.com>2018-05-25 21:24:35 +0200
committerFlorian Fainelli <f.fainelli@gmail.com>2018-07-09 10:47:27 -0700
commit74d1e007915fab590f8be9dc647b19511260210c (patch)
tree57c13529adb99345e5294865c075ebee18b8496e /tools/power
parentbe3035e3627d2570de4c2c612ecd095968986437 (diff)
hwmon: Add support for RPi voltage sensor
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 Trønnes" <noralf@tronnes.org> Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com> Signed-off-by: Eric Anholt <eric@anholt.net> Acked-by: Guenter Roeck <linux@roeck-us.net>
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