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Based on the board schematics at https://dl.radxa.com/rockpi4/docs/hw/rockpi4/rockpi_4c_v12_sch_20200620.pdf on page 18: vcc_lan is not controllable by software, it is just an analog LC filter. Because of this, it can not be turned off-in-suspend. and on page 17: vcc_cam and vcc_mipi are not voltage regulators, they are just switches. So, the voltage range is not applicable. This silences an error message about not being able to adjust the voltage. Signed-off-by: Vicente Bergas <vicencb@gmail.com> Link: https://lore.kernel.org/r/20201201154132.1286-2-vicencb@gmail.com Signed-off-by: Heiko Stuebner <heiko@sntech.de>