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