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b110a8fb24
The V3 regulator can be configured with an external resistor connected to the feedback pin (R24 in the data sheet) to increase the voltage range. For example, hx4700 has R24 = 3.32 kOhm to achieve a maximum V3 voltage of 1.55 V which is needed for 624 MHz CPU frequency. Signed-off-by: Philipp Zabel <philipp.zabel@gmail.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
64 lines
2.1 KiB
C
64 lines
2.1 KiB
C
/*
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* max1586.h -- Voltage regulation for the Maxim 1586
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*
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* Copyright (C) 2008 Robert Jarzmik
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef REGULATOR_MAX1586
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#define REGULATOR_MAX1586
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#include <linux/regulator/machine.h>
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#define MAX1586_V3 0
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#define MAX1586_V6 1
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/* precalculated values for v3_gain */
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#define MAX1586_GAIN_NO_R24 1000000 /* 700000 .. 1475000 mV */
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#define MAX1586_GAIN_R24_3k32 1051098 /* 735768 .. 1550369 mV */
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#define MAX1586_GAIN_R24_5k11 1078648 /* 755053 .. 1591005 mV */
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#define MAX1586_GAIN_R24_7k5 1115432 /* 780802 .. 1645262 mV */
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/**
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* max1586_subdev_data - regulator data
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* @id: regulator Id (either MAX1586_V3 or MAX1586_V6)
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* @name: regulator cute name (example for V3: "vcc_core")
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* @platform_data: regulator init data (contraints, supplies, ...)
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*/
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struct max1586_subdev_data {
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int id;
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char *name;
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struct regulator_init_data *platform_data;
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};
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/**
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* max1586_platform_data - platform data for max1586
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* @num_subdevs: number of regultors used (may be 1 or 2)
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* @subdevs: regulator used
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* At most, there will be a regulator for V3 and one for V6 voltages.
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* @v3_gain: gain on the V3 voltage output multiplied by 1e6.
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* This can be calculated as ((1 + R24/R25 + R24/185.5kOhm) * 1e6)
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* for an external resistor configuration as described in the
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* data sheet (R25=100kOhm).
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*/
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struct max1586_platform_data {
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int num_subdevs;
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struct max1586_subdev_data *subdevs;
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int v3_gain;
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};
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#endif
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