84 lines
1.8 KiB
C
84 lines
1.8 KiB
C
/*
|
|
* (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;
|
|
}
|