1*b04601a7SPhilip, Avinash /*
2*b04601a7SPhilip, Avinash * (C) Copyright 2011-2013
3*b04601a7SPhilip, Avinash * Texas Instruments, <www.ti.com>
4*b04601a7SPhilip, Avinash *
5*b04601a7SPhilip, Avinash * SPDX-License-Identifier: GPL-2.0+
6*b04601a7SPhilip, Avinash */
7*b04601a7SPhilip, Avinash
8*b04601a7SPhilip, Avinash #include <common.h>
9*b04601a7SPhilip, Avinash #include <i2c.h>
10*b04601a7SPhilip, Avinash #include <power/tps65910.h>
11*b04601a7SPhilip, Avinash
12*b04601a7SPhilip, Avinash /*
13*b04601a7SPhilip, Avinash * tps65910_set_i2c_control() - Set the TPS65910 to be controlled via the I2C
14*b04601a7SPhilip, Avinash * interface.
15*b04601a7SPhilip, Avinash * @return: 0 on success, not 0 on failure
16*b04601a7SPhilip, Avinash */
tps65910_set_i2c_control(void)17*b04601a7SPhilip, Avinash int tps65910_set_i2c_control(void)
18*b04601a7SPhilip, Avinash {
19*b04601a7SPhilip, Avinash int ret;
20*b04601a7SPhilip, Avinash uchar buf;
21*b04601a7SPhilip, Avinash
22*b04601a7SPhilip, Avinash /* VDD1/2 voltage selection register access by control i/f */
23*b04601a7SPhilip, Avinash ret = i2c_read(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1,
24*b04601a7SPhilip, Avinash &buf, 1);
25*b04601a7SPhilip, Avinash
26*b04601a7SPhilip, Avinash if (ret)
27*b04601a7SPhilip, Avinash return ret;
28*b04601a7SPhilip, Avinash
29*b04601a7SPhilip, Avinash buf |= TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C;
30*b04601a7SPhilip, Avinash
31*b04601a7SPhilip, Avinash return i2c_write(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1,
32*b04601a7SPhilip, Avinash &buf, 1);
33*b04601a7SPhilip, Avinash }
34*b04601a7SPhilip, Avinash
35*b04601a7SPhilip, Avinash /*
36*b04601a7SPhilip, Avinash * tps65910_voltage_update() - Voltage switching for MPU frequency switching.
37*b04601a7SPhilip, Avinash * @module: mpu - 0, core - 1
38*b04601a7SPhilip, Avinash * @vddx_op_vol_sel: vdd voltage to set
39*b04601a7SPhilip, Avinash * @return: 0 on success, not 0 on failure
40*b04601a7SPhilip, Avinash */
tps65910_voltage_update(unsigned int module,unsigned char vddx_op_vol_sel)41*b04601a7SPhilip, Avinash int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel)
42*b04601a7SPhilip, Avinash {
43*b04601a7SPhilip, Avinash uchar buf;
44*b04601a7SPhilip, Avinash unsigned int reg_offset;
45*b04601a7SPhilip, Avinash int ret;
46*b04601a7SPhilip, Avinash
47*b04601a7SPhilip, Avinash if (module == MPU)
48*b04601a7SPhilip, Avinash reg_offset = TPS65910_VDD1_OP_REG;
49*b04601a7SPhilip, Avinash else
50*b04601a7SPhilip, Avinash reg_offset = TPS65910_VDD2_OP_REG;
51*b04601a7SPhilip, Avinash
52*b04601a7SPhilip, Avinash /* Select VDDx OP */
53*b04601a7SPhilip, Avinash ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
54*b04601a7SPhilip, Avinash if (ret)
55*b04601a7SPhilip, Avinash return ret;
56*b04601a7SPhilip, Avinash
57*b04601a7SPhilip, Avinash buf &= ~TPS65910_OP_REG_CMD_MASK;
58*b04601a7SPhilip, Avinash
59*b04601a7SPhilip, Avinash ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
60*b04601a7SPhilip, Avinash if (ret)
61*b04601a7SPhilip, Avinash return ret;
62*b04601a7SPhilip, Avinash
63*b04601a7SPhilip, Avinash /* Configure VDDx OP Voltage */
64*b04601a7SPhilip, Avinash ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
65*b04601a7SPhilip, Avinash if (ret)
66*b04601a7SPhilip, Avinash return ret;
67*b04601a7SPhilip, Avinash
68*b04601a7SPhilip, Avinash buf &= ~TPS65910_OP_REG_SEL_MASK;
69*b04601a7SPhilip, Avinash buf |= vddx_op_vol_sel;
70*b04601a7SPhilip, Avinash
71*b04601a7SPhilip, Avinash ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
72*b04601a7SPhilip, Avinash if (ret)
73*b04601a7SPhilip, Avinash return ret;
74*b04601a7SPhilip, Avinash
75*b04601a7SPhilip, Avinash ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1);
76*b04601a7SPhilip, Avinash if (ret)
77*b04601a7SPhilip, Avinash return ret;
78*b04601a7SPhilip, Avinash
79*b04601a7SPhilip, Avinash if ((buf & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel)
80*b04601a7SPhilip, Avinash return 1;
81*b04601a7SPhilip, Avinash
82*b04601a7SPhilip, Avinash return 0;
83*b04601a7SPhilip, Avinash }
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