drivers/power/pmic/pmic_tps62362.c

   1 /*
   2  * (C) Copyright 2014 Texas Instruments Incorporated -  http://www.ti.com
   3  * Author: Felipe Balbi <balbi@ti.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <i2c.h>
  10 #include <linux/errno.h>
  11 #include <power/pmic.h>
  12 #include <power/tps62362.h>
  13
  14 /**
  15  * tps62362_voltage_update() - Function to change a voltage level, as this
  16  *                             is a multi-step process.
  17  * @reg:        Register address to write to
  18  * @volt_sel:   Voltage register value to write
  19  * @return:     0 on success, 1 on failure
  20  */
  21 int tps62362_voltage_update(unsigned char reg, unsigned char volt_sel)
  22 {
  23         if (reg > TPS62362_NUM_REGS)
  24                 return 1;
  25
  26         return i2c_write(TPS62362_I2C_ADDR, reg, 1, &volt_sel, 1);
  27 }
  28
  29 int power_tps62362_init(unsigned char bus)
  30 {
  31         static const char name[] = "TPS62362";
  32         struct pmic *p = pmic_alloc();
  33
  34         if (!p) {
  35                 printf("%s: POWER allocation error!\n", __func__);
  36                 return -ENOMEM;
  37         }
  38
  39         p->name = name;
  40         p->interface = PMIC_I2C;
  41         p->number_of_regs = TPS62362_NUM_REGS;
  42         p->hw.i2c.addr = TPS62362_I2C_ADDR;
  43         p->hw.i2c.tx_num = 1;
  44         p->bus = bus;
  45
  46         return 0;
  47 }