drivers/power/pmic/pmic_tps65910.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2011-2013
   4  * Texas Instruments, <www.ti.com>
   5  */
   6
   7 #include <common.h>
   8 #include <i2c.h>
   9 #include <power/tps65910.h>
  10
  11 struct udevice *tps65910_dev __section(".data") = NULL;
  12
  13 static inline int tps65910_read_reg(int addr, uchar *buf)
  14 {
  15 #if !CONFIG_IS_ENABLED(DM_I2C)
  16         return i2c_read(TPS65910_CTRL_I2C_ADDR, addr, 1, buf, 1);
  17 #else
  18         int rc;
  19
  20         rc = dm_i2c_reg_read(tps65910_dev, addr);
  21         if (rc < 0)
  22                 return rc;
  23         *buf = (uchar)rc;
  24         return 0;
  25 #endif
  26 }
  27
  28 static inline int tps65910_write_reg(int addr, uchar *buf)
  29 {
  30 #if !CONFIG_IS_ENABLED(DM_I2C)
  31         return i2c_write(TPS65910_CTRL_I2C_ADDR, addr, 1, buf, 1);
  32 #else
  33         return dm_i2c_reg_write(tps65910_dev, addr, *buf);
  34 #endif
  35 }
  36
  37 int power_tps65910_init(unsigned char bus)
  38 {
  39 #if CONFIG_IS_ENABLED(DM_I2C)
  40         struct udevice *dev = NULL;
  41         int rc;
  42
  43         rc = i2c_get_chip_for_busnum(bus, TPS65910_CTRL_I2C_ADDR, 1, &dev);
  44
  45         if (rc)
  46                 return rc;
  47         tps65910_dev = dev;
  48 #endif
  49         return 0;
  50 }
  51
  52 /*
  53  * tps65910_set_i2c_control() - Set the TPS65910 to be controlled via the I2C
  54  *                              interface.
  55  * @return:                    0 on success, not 0 on failure
  56  */
  57 int tps65910_set_i2c_control(void)
  58 {
  59         int ret;
  60         uchar buf;
  61
  62         /* VDD1/2 voltage selection register access by control i/f */
  63         ret = tps65910_read_reg(TPS65910_DEVCTRL_REG, &buf);
  64
  65         if (ret)
  66                 return ret;
  67
  68         buf |= TPS65910_DEVCTRL_REG_SR_CTL_I2C_SEL_CTL_I2C;
  69
  70         return tps65910_write_reg(TPS65910_DEVCTRL_REG, &buf);
  71 }
  72
  73 /*
  74  * tps65910_voltage_update() - Voltage switching for MPU frequency switching.
  75  * @module:                    mpu - 0, core - 1
  76  * @vddx_op_vol_sel:           vdd voltage to set
  77  * @return:                    0 on success, not 0 on failure
  78  */
  79 int tps65910_voltage_update(unsigned int module, unsigned char vddx_op_vol_sel)
  80 {
  81         uchar buf;
  82         unsigned int reg_offset;
  83         int ret;
  84
  85         if (module == MPU)
  86                 reg_offset = TPS65910_VDD1_OP_REG;
  87         else
  88                 reg_offset = TPS65910_VDD2_OP_REG;
  89
  90         /* Select VDDx OP   */
  91         ret = tps65910_read_reg(reg_offset, &buf);
  92         if (ret)
  93                 return ret;
  94
  95         buf &= ~TPS65910_OP_REG_CMD_MASK;
  96
  97         ret = tps65910_write_reg(reg_offset, &buf);
  98         if (ret)
  99                 return ret;
 100
 101         /* Configure VDDx OP  Voltage */
 102         ret = tps65910_read_reg(reg_offset, &buf);
 103         if (ret)
 104                 return ret;
 105
 106         buf &= ~TPS65910_OP_REG_SEL_MASK;
 107         buf |= vddx_op_vol_sel;
 108
 109         ret = tps65910_write_reg(reg_offset, &buf);
 110         if (ret)
 111                 return ret;
 112
 113         ret = tps65910_read_reg(reg_offset, &buf);
 114         if (ret)
 115                 return ret;
 116
 117         if ((buf & TPS65910_OP_REG_SEL_MASK) != vddx_op_vol_sel)
 118                 return 1;
 119
 120         return 0;
 121 }