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https://github.com/AsahiLinux/u-boot
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121 lines
2.4 KiB
C
121 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* (C) Copyright 2011-2013
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* Texas Instruments, <www.ti.com>
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*/
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#include <common.h>
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#include <i2c.h>
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#include <power/tps65910.h>
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struct udevice *tps65910_dev __section(".data") = NULL;
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static inline int tps65910_read_reg(int addr, uchar *buf)
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{
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#if !CONFIG_IS_ENABLED(DM_I2C)
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return i2c_read(TPS65910_CTRL_I2C_ADDR, addr, 1, buf, 1);
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#else
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int rc;
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rc = dm_i2c_reg_read(tps65910_dev, addr);
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if (rc < 0)
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return rc;
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*buf = (uchar)rc;
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return 0;
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#endif
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}
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static inline int tps65910_write_reg(int addr, uchar *buf)
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{
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#if !CONFIG_IS_ENABLED(DM_I2C)
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return i2c_write(TPS65910_CTRL_I2C_ADDR, addr, 1, buf, 1);
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#else
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return dm_i2c_reg_write(tps65910_dev, addr, *buf);
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#endif
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}
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int power_tps65910_init(unsigned char bus)
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{
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#if CONFIG_IS_ENABLED(DM_I2C)
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struct udevice *dev = NULL;
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int rc;
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rc = i2c_get_chip_for_busnum(bus, TPS65910_CTRL_I2C_ADDR, 1, &dev);
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if (rc)
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return rc;
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tps65910_dev = dev;
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#endif
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return 0;
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}
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/*
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* tps65910_set_i2c_control() - Set the TPS65910 to be controlled via the I2C
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* interface.
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* @return: 0 on success, not 0 on failure
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*/
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int tps65910_set_i2c_control(void)
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{
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int ret;
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uchar buf;
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/* VDD1/2 voltage selection register access by control i/f */
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ret = tps65910_read_reg(TPS65910_DEVCTRL_REG, &buf);
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if (ret)
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return ret;
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buf |= TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C;
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return tps65910_write_reg(TPS65910_DEVCTRL_REG, &buf);
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}
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/*
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* tps65910_voltage_update() - Voltage switching for MPU frequency switching.
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* @module: mpu - 0, core - 1
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* @vddx_op_vol_sel: vdd voltage to set
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* @return: 0 on success, not 0 on failure
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*/
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int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel)
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{
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uchar buf;
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unsigned int reg_offset;
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int ret;
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if (module == MPU)
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reg_offset = TPS65910_VDD1_OP_REG;
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else
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reg_offset = TPS65910_VDD2_OP_REG;
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/* Select VDDx OP */
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ret = tps65910_read_reg(reg_offset, &buf);
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if (ret)
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return ret;
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buf &= ~TPS65910_OP_REG_CMD_MASK;
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ret = tps65910_write_reg(reg_offset, &buf);
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if (ret)
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return ret;
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/* Configure VDDx OP Voltage */
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ret = tps65910_read_reg(reg_offset, &buf);
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if (ret)
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return ret;
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buf &= ~TPS65910_OP_REG_SEL_MASK;
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buf |= vddx_op_vol_sel;
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ret = tps65910_write_reg(reg_offset, &buf);
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if (ret)
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return ret;
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ret = tps65910_read_reg(reg_offset, &buf);
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if (ret)
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return ret;
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if ((buf & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel)
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return 1;
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return 0;
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}
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