// SPDX-License-Identifier: GPL-2.0+ /* * (C) Copyright 2011-2013 * Texas Instruments, <www.ti.com> */ #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; }