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_ */ 69