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committed a86854d0c59/* * max8660.c -- Voltage regulation for the Maxim 8660/8661 * * based on max1586.c and wm8400-regulator.c * * Copyright (C) 2009 Wolfram Sang, Pengutronix e.K. * * 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; version 2 of the License. * * 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., 59 Temple * Place, Suite 330, Boston, MA 02111-1307 USA * * Some info: * * Datasheet: http://datasheets.maxim-ic.com/en/ds/MAX8660-MAX8661.pdf * * This chip is a bit nasty because it is a write-only device. Thus, the driver * uses shadow registers to keep track of its values. The main problem appears * to be the initialization: When Linux boots up, we cannot know if the chip is * in the default state or not, so we would have to pass such information in * platform_data. As this adds a bit of complexity to the driver, this is left * out for now until it is really needed. * * [A|S|M]DTV1 registers are currently not used, but [A|S|M]DTV2. * * If the driver is feature complete, it might be worth to check if one set of * functions for V3-V7 is sufficient. For maximum flexibility during * development, they are separated for now. * */