mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-12 14:23:00 +00:00
121 lines
2.4 KiB
C
121 lines
2.4 KiB
C
// 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>
|
|
|
|
struct udevice *tps65910_dev __section(".data") = NULL;
|
|
|
|
static inline int tps65910_read_reg(int addr, uchar *buf)
|
|
{
|
|
#if !CONFIG_IS_ENABLED(DM_I2C)
|
|
return i2c_read(TPS65910_CTRL_I2C_ADDR, addr, 1, buf, 1);
|
|
#else
|
|
int rc;
|
|
|
|
rc = dm_i2c_reg_read(tps65910_dev, addr);
|
|
if (rc < 0)
|
|
return rc;
|
|
*buf = (uchar)rc;
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
static inline int tps65910_write_reg(int addr, uchar *buf)
|
|
{
|
|
#if !CONFIG_IS_ENABLED(DM_I2C)
|
|
return i2c_write(TPS65910_CTRL_I2C_ADDR, addr, 1, buf, 1);
|
|
#else
|
|
return dm_i2c_reg_write(tps65910_dev, addr, *buf);
|
|
#endif
|
|
}
|
|
|
|
int power_tps65910_init(unsigned char bus)
|
|
{
|
|
#if CONFIG_IS_ENABLED(DM_I2C)
|
|
struct udevice *dev = NULL;
|
|
int rc;
|
|
|
|
rc = i2c_get_chip_for_busnum(bus, TPS65910_CTRL_I2C_ADDR, 1, &dev);
|
|
|
|
if (rc)
|
|
return rc;
|
|
tps65910_dev = dev;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* 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 = tps65910_read_reg(TPS65910_DEVCTRL_REG, &buf);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
buf |= TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C;
|
|
|
|
return tps65910_write_reg(TPS65910_DEVCTRL_REG, &buf);
|
|
}
|
|
|
|
/*
|
|
* 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 = tps65910_read_reg(reg_offset, &buf);
|
|
if (ret)
|
|
return ret;
|
|
|
|
buf &= ~TPS65910_OP_REG_CMD_MASK;
|
|
|
|
ret = tps65910_write_reg(reg_offset, &buf);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* Configure VDDx OP Voltage */
|
|
ret = tps65910_read_reg(reg_offset, &buf);
|
|
if (ret)
|
|
return ret;
|
|
|
|
buf &= ~TPS65910_OP_REG_SEL_MASK;
|
|
buf |= vddx_op_vol_sel;
|
|
|
|
ret = tps65910_write_reg(reg_offset, &buf);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = tps65910_read_reg(reg_offset, &buf);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if ((buf & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel)
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|