| Simon Glass | 7bbdecd | 2012-04-02 13:18:44 +0000 | [diff] [blame] | 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_ */ |