include/linux/regulator/max8973-regulator.h

   1 /*
   2  * max8973-regulator.h -- MAXIM 8973 regulator
   3  *
   4  * Interface for regulator driver for MAXIM 8973 DC-DC step-down
   5  * switching regulator.
   6  *
   7  * Copyright (C) 2012 NVIDIA Corporation
   8
   9  * Author: Laxman Dewangan <ldewangan@nvidia.com>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but WITHOUT
  17  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  18  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  19  * more details.
  20  *
  21  * You should have received a copy of the GNU General Public License along
  22  * with this program; if not, write to the Free Software Foundation, Inc.,
  23  * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  24  *
  25  */
  26
  27 #ifndef __LINUX_REGULATOR_MAX8973_H
  28 #define __LINUX_REGULATOR_MAX8973_H
  29
  30 /*
  31  * Control flags for configuration of the device.
  32  * Client need to pass this information with ORed
  33  */
  34 #define MAX8973_CONTROL_REMOTE_SENSE_ENABLE                     0x00000001
  35 #define MAX8973_CONTROL_FALLING_SLEW_RATE_ENABLE                0x00000002
  36 #define MAX8973_CONTROL_OUTPUT_ACTIVE_DISCH_ENABLE              0x00000004
  37 #define MAX8973_CONTROL_BIAS_ENABLE                             0x00000008
  38 #define MAX8973_CONTROL_PULL_DOWN_ENABLE                        0x00000010
  39 #define MAX8973_CONTROL_FREQ_SHIFT_9PER_ENABLE                  0x00000020
  40
  41 #define MAX8973_CONTROL_CLKADV_TRIP_DISABLED                    0x00000000
  42 #define MAX8973_CONTROL_CLKADV_TRIP_75mV_PER_US                 0x00010000
  43 #define MAX8973_CONTROL_CLKADV_TRIP_150mV_PER_US                0x00020000
  44 #define MAX8973_CONTROL_CLKADV_TRIP_75mV_PER_US_HIST_DIS        0x00030000
  45
  46 #define MAX8973_CONTROL_INDUCTOR_VALUE_NOMINAL                  0x00000000
  47 #define MAX8973_CONTROL_INDUCTOR_VALUE_MINUS_30_PER             0x00100000
  48 #define MAX8973_CONTROL_INDUCTOR_VALUE_PLUS_30_PER              0x00200000
  49 #define MAX8973_CONTROL_INDUCTOR_VALUE_PLUS_60_PER              0x00300000
  50
  51 /*
  52  * struct max8973_regulator_platform_data - max8973 regulator platform data.
  53  *
  54  * @reg_init_data: The regulator init data.
  55  * @control_flags: Control flags which are ORed value of above flags to
  56  *              configure device.
  57  * @junction_temp_warning: Junction temp in millicelcius on which warning need
  58  *                         to be set. Thermal functionality is only supported on
  59  *                         MAX77621. The threshold warning supported by MAX77621
  60  *                         are 120C and 140C.
  61  * @enable_ext_control: Enable the voltage enable/disable through external
  62  *              control signal from EN input pin. If it is false then
  63  *              voltage output will be enabled/disabled through EN bit of
  64  *              device register.
  65  * @enable_gpio: Enable GPIO. If EN pin is controlled through GPIO from host
  66  *              then GPIO number can be provided. If no GPIO controlled then
  67  *              it should be -1.
  68  * @dvs_gpio: GPIO for dvs. It should be -1 if this is tied with fixed logic.
  69  * @dvs_def_state: Default state of dvs. 1 if it is high else 0.
  70  */
  71 struct max8973_regulator_platform_data {
  72         struct regulator_init_data *reg_init_data;
  73         unsigned long control_flags;
  74         unsigned long junction_temp_warning;
  75         bool enable_ext_control;
  76         int enable_gpio;
  77         int dvs_gpio;
  78         unsigned dvs_def_state:1;
  79 };
  80
  81 #endif /* __LINUX_REGULATOR_MAX8973_H */