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b04601a7 PA |
1 | /* |
2 | * (C) Copyright 2011-2013 | |
3 | * Texas Instruments, <www.ti.com> | |
4 | * | |
5 | * SPDX-License-Identifier: GPL-2.0+ | |
6 | */ | |
7 | ||
8 | #include <common.h> | |
9 | #include <i2c.h> | |
10 | #include <power/tps65910.h> | |
11 | ||
12 | /* | |
13 | * tps65910_set_i2c_control() - Set the TPS65910 to be controlled via the I2C | |
14 | * interface. | |
15 | * @return: 0 on success, not 0 on failure | |
16 | */ | |
17 | int tps65910_set_i2c_control(void) | |
18 | { | |
19 | int ret; | |
20 | uchar buf; | |
21 | ||
22 | /* VDD1/2 voltage selection register access by control i/f */ | |
23 | ret = i2c_read(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1, | |
24 | &buf, 1); | |
25 | ||
26 | if (ret) | |
27 | return ret; | |
28 | ||
29 | buf |= TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C; | |
30 | ||
31 | return i2c_write(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1, | |
32 | &buf, 1); | |
33 | } | |
34 | ||
35 | /* | |
36 | * tps65910_voltage_update() - Voltage switching for MPU frequency switching. | |
37 | * @module: mpu - 0, core - 1 | |
38 | * @vddx_op_vol_sel: vdd voltage to set | |
39 | * @return: 0 on success, not 0 on failure | |
40 | */ | |
41 | int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel) | |
42 | { | |
43 | uchar buf; | |
44 | unsigned int reg_offset; | |
45 | int ret; | |
46 | ||
47 | if (module == MPU) | |
48 | reg_offset = TPS65910_VDD1_OP_REG; | |
49 | else | |
50 | reg_offset = TPS65910_VDD2_OP_REG; | |
51 | ||
52 | /* Select VDDx OP */ | |
53 | ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); | |
54 | if (ret) | |
55 | return ret; | |
56 | ||
57 | buf &= ~TPS65910_OP_REG_CMD_MASK; | |
58 | ||
59 | ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); | |
60 | if (ret) | |
61 | return ret; | |
62 | ||
63 | /* Configure VDDx OP Voltage */ | |
64 | ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); | |
65 | if (ret) | |
66 | return ret; | |
67 | ||
68 | buf &= ~TPS65910_OP_REG_SEL_MASK; | |
69 | buf |= vddx_op_vol_sel; | |
70 | ||
71 | ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); | |
72 | if (ret) | |
73 | return ret; | |
74 | ||
75 | ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); | |
76 | if (ret) | |
77 | return ret; | |
78 | ||
79 | if ((buf & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel) | |
80 | return 1; | |
81 | ||
82 | return 0; | |
83 | } |