projects / thirdparty / u-boot.git / blame
| Commit | Line | Data |
|---|---|---|
| 83d290c5 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| b04601a7 PA |
2 | /* |
| 3 | * (C) Copyright 2011-2013 | |
| 4 | * Texas Instruments, <www.ti.com> | |
| b04601a7 PA |
5 | */ |
| 6 | ||
| 7 | #include <common.h> | |
| 8 | #include <i2c.h> | |
| 9 | #include <power/tps65910.h> | |
| 10 | ||
| 11 | /* | |
| 12 | * tps65910_set_i2c_control() - Set the TPS65910 to be controlled via the I2C | |
| 13 | * interface. | |
| 14 | * @return: 0 on success, not 0 on failure | |
| 15 | */ | |
| 16 | int tps65910_set_i2c_control(void) | |
| 17 | { | |
| 18 | int ret; | |
| 19 | uchar buf; | |
| 20 | ||
| 21 | /* VDD1/2 voltage selection register access by control i/f */ | |
| 22 | ret = i2c_read(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1, | |
| 23 | &buf, 1); | |
| 24 | ||
| 25 | if (ret) | |
| 26 | return ret; | |
| 27 | ||
| 28 | buf |= TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C; | |
| 29 | ||
| 30 | return i2c_write(TPS65910_CTRL_I2C_ADDR, TPS65910_DEVCTRL_REG, 1, | |
| 31 | &buf, 1); | |
| 32 | } | |
| 33 | ||
| 34 | /* | |
| 35 | * tps65910_voltage_update() - Voltage switching for MPU frequency switching. | |
| 36 | * @module: mpu - 0, core - 1 | |
| 37 | * @vddx_op_vol_sel: vdd voltage to set | |
| 38 | * @return: 0 on success, not 0 on failure | |
| 39 | */ | |
| 40 | int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel) | |
| 41 | { | |
| 42 | uchar buf; | |
| 43 | unsigned int reg_offset; | |
| 44 | int ret; | |
| 45 | ||
| 46 | if (module == MPU) | |
| 47 | reg_offset = TPS65910_VDD1_OP_REG; | |
| 48 | else | |
| 49 | reg_offset = TPS65910_VDD2_OP_REG; | |
| 50 | ||
| 51 | /* Select VDDx OP */ | |
| 52 | ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); | |
| 53 | if (ret) | |
| 54 | return ret; | |
| 55 | ||
| 56 | buf &= ~TPS65910_OP_REG_CMD_MASK; | |
| 57 | ||
| 58 | ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); | |
| 59 | if (ret) | |
| 60 | return ret; | |
| 61 | ||
| 62 | /* Configure VDDx OP Voltage */ | |
| 63 | ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); | |
| 64 | if (ret) | |
| 65 | return ret; | |
| 66 | ||
| 67 | buf &= ~TPS65910_OP_REG_SEL_MASK; | |
| 68 | buf |= vddx_op_vol_sel; | |
| 69 | ||
| 70 | ret = i2c_write(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); | |
| 71 | if (ret) | |
| 72 | return ret; | |
| 73 | ||
| 74 | ret = i2c_read(TPS65910_CTRL_I2C_ADDR, reg_offset, 1, &buf, 1); | |
| 75 | if (ret) | |
| 76 | return ret; | |
| 77 | ||
| 78 | if ((buf & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel) | |
| 79 | return 1; | |
| 80 | ||
| 81 | return 0; | |
| 82 | } |