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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 | // 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; } |