include/tps6586x.h

   1 /*
   2  *  (C) Copyright 2010,2011
   3  *  NVIDIA Corporation <www.nvidia.com>
   4  *
   5  * See file CREDITS for list of people who contributed to this
   6  * project.
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License as
  10  * published by the Free Software Foundation; either version 2 of
  11  * the License, or (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  21  * MA 02111-1307 USA
  22  */
  23
  24 #ifndef __H_
  25 #define _TPS6586X_H_
  26
  27 enum {
  28         /* SM0-2 PWM/PFM Mode Selection */
  29         TPS6586X_PWM_SM0        = 1 << 0,
  30         TPS6586X_PWM_SM1        = 1 << 1,
  31         TPS6586X_PWM_SM2        = 1 << 2,
  32 };
  33
  34 /**
  35  * Enable PWM mode for selected SM0-2
  36  *
  37  * @param mask  Mask of synchronous converter to enable (TPS6586X_PWM_...)
  38  * @return 0 if ok, -1 on error
  39  */
  40 int tps6586x_set_pwm_mode(int mask);
  41
  42 /**
  43  * Adjust SM0 and SM1 voltages to the given targets in incremental steps.
  44  *
  45  * @param sm0_target    Target voltage for SM0 in 25mW units, 0=725mV, 31=1.5V
  46  * @param sm1_target    Target voltage for SM1 in 25mW units, 0=725mV, 31=1.5V
  47  * @param step          Amount to change voltage in each step, in 25mW units
  48  * @param rate          Slew ratein mV/us: 0=instantly, 1=0.11, 2=0.22,
  49  *                      3=0.44, 4=0.88, 5=1.76, 6=3.52, 7=7.04
  50  * @param min_sm0_over_sm1      Minimum amount by which sm0 must exceed sm1.
  51  *                      If this condition is not met, no adjustment will be
  52  *                      done and an error will be reported. Use -1 to skip
  53  *                      this check.
  54  * @return 0 if ok, -1 on error
  55  */
  56 int tps6586x_adjust_sm0_sm1(int sm0_target, int sm1_target, int step, int rate,
  57                             int min_sm0_over_sm1);
  58
  59 /**
  60  * Set up the TPS6586X I2C bus number. This will be used for all operations
  61  * on the device. This function must be called before using other functions.
  62  *
  63  * @param bus   I2C bus number containing the TPS6586X chip
  64  * @return 0 (always succeeds)
  65  */
  66 int tps6586x_init(int bus);
  67
  68 #endif  /* _TPS6586X_H_ */