VIM3 Android Power Suspend by Voltage Level / GPIO?

Terry · January 23, 2021, 7:16am

Did you want to wake up the system when the device go into deep sleep? Not early suspend?

On deep sleep mode
- You need to modify the file on u-boot

khadas/u-boot/blob/khadas-vims-pie/board/khadas/kvim3l/firmware/scp_task/pwr_ctrl.c


/*
 * board/khadas/kvim3l/firmware/scp_task/pwr_ctrl.c
 *
 * Copyright (C) 2015 Amlogic, Inc. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/

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On early suspend
- You need to add driver support on kernel