1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
/*
* (C) Copyright 2011-2013
* Texas Instruments, <www.ti.com>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <i2c.h>
#include <power/tps65910.h>
/*
* tps65910_set_i2c_control() - Set the TPS65910 to be controlled via the I2C
* interface.
* @return: 0 on success, not 0 on failure
*/
int tps65910_set_i2c_control(void)
{
int ret;
uchar buf;
/* VDD1/2 voltage selection register access by control i/f */
ret = i2c_read(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1,
&buf, 1);
if (ret)
return ret;
buf |= TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C;
return i2c_write(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1,
&buf, 1);
}
/*
* tps65910_voltage_update() - Voltage switching for MPU frequency switching.
* @module: mpu - 0, core - 1
* @vddx_op_vol_sel: vdd voltage to set
* @return: 0 on success, not 0 on failure
*/
int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel)
{
uchar buf;
unsigned int reg_offset;
int ret;
if (module == MPU)
reg_offset = TPS65910_VDD1_OP_REG;
else
reg_offset = TPS65910_VDD2_OP_REG;
/* Select VDDx OP */
ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
if (ret)
return ret;
buf &= ~TPS65910_OP_REG_CMD_MASK;
ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
if (ret)
return ret;
/* Configure VDDx OP Voltage */
ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
if (ret)
return ret;
buf &= ~TPS65910_OP_REG_SEL_MASK;
buf |= vddx_op_vol_sel;
ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
if (ret)
return ret;
ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
if (ret)
return ret;
if ((buf & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel)
return 1;
return 0;
}
|
