xref: /openbmc/u-boot/include/tps6586x.h (revision 3e9aa320)
1 /*
2  *  (C) Copyright 2010,2011
3  *  NVIDIA Corporation <www.nvidia.com>
4  *
5  * SPDX-License-Identifier:	GPL-2.0+
6  */
7 
8 #ifndef _TPS6586X_H_
9 #define _TPS6586X_H_
10 
11 enum {
12 	/* SM0-2 PWM/PFM Mode Selection */
13 	TPS6586X_PWM_SM0	= 1 << 0,
14 	TPS6586X_PWM_SM1	= 1 << 1,
15 	TPS6586X_PWM_SM2	= 1 << 2,
16 };
17 
18 /**
19  * Enable PWM mode for selected SM0-2
20  *
21  * @param mask	Mask of synchronous converter to enable (TPS6586X_PWM_...)
22  * @return 0 if ok, -1 on error
23  */
24 int tps6586x_set_pwm_mode(int mask);
25 
26 /**
27  * Adjust SM0 and SM1 voltages to the given targets in incremental steps.
28  *
29  * @param sm0_target	Target voltage for SM0 in 25mW units, 0=725mV, 31=1.5V
30  * @param sm1_target	Target voltage for SM1 in 25mW units, 0=725mV, 31=1.5V
31  * @param step		Amount to change voltage in each step, in 25mW units
32  * @param rate		Slew ratein mV/us: 0=instantly, 1=0.11, 2=0.22,
33  *			3=0.44, 4=0.88, 5=1.76, 6=3.52, 7=7.04
34  * @param min_sm0_over_sm1	Minimum amount by which sm0 must exceed sm1.
35  *			If this condition is not met, no adjustment will be
36  *			done and an error will be reported. Use -1 to skip
37  *			this check.
38  * @return 0 if ok, -1 on error
39  */
40 int tps6586x_adjust_sm0_sm1(int sm0_target, int sm1_target, int step, int rate,
41 			    int min_sm0_over_sm1);
42 
43 /**
44  * Set up the TPS6586X I2C bus number. This will be used for all operations
45  * on the device. This function must be called before using other functions.
46  *
47  * @param bus	I2C bus containing the TPS6586X chip
48  * @return 0 (always succeeds)
49  */
50 int tps6586x_init(struct udevice *bus);
51 
52 #endif	/* _TPS6586X_H_ */
53