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- // 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 __attribute__((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;
- }
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