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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_ */ |