Chip must not be in shutdown for reading temperature, so briefly leave
shutdown if buffer is not already running
Signed-off-by: NPeter Meerwald-Stadler <pmeerw@pmeerw.net>
Acked-by: NMatt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>